JPH0796082B2 - Fibrous adsorbent, solution processing method and solution processing apparatus using the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fibrous adsorbent using a powder anion exchange resin as an adsorbent, and further to a solution processing method and a solution processing apparatus using the same.

[0002]

2. Description of the Related Art Powdered ion-exchange resins have excellent performance as detergents and are expected to be effectively used in various fields, but they are very expensive and have a morphological characteristic of powder. Therefore, there are many difficulties in operability, and it is said that the operation for solid-liquid separation is particularly difficult. Therefore, its field of use is very limited, and there are only a few reports in the nuclear field.

Under these circumstances, the inventors of the present invention have conducted repeated studies on the repeated recycling of powder ion exchange resins,
We have already proposed a technology to decolorize the solution while regenerating the powder anion exchange resin. This makes it possible to efficiently remove the dye components etc. in the solution with a powdered anion exchange resin of a specific particle size, and it can be used repeatedly by a completely different regeneration method from the ordinary regeneration of granular ion exchange resin. In particular, by pulverizing and using a used granular anion exchange resin that cannot recover its ability as a powder anion exchange resin, a great economic effect is expected.

[0004]

As described above, the present inventors have found the possibility of repetitive reuse of the powdered anion exchange resin, but considering the use on an industrial scale,
In terms of operability, etc., it is still not sufficient, and there are many points to be improved. For example, if the above-mentioned powder anion exchange resin is directly packed in a column and used, even though it can be filtered to some extent, its liquid permeability is greatly inferior to that of granular ion exchange resin, and regeneration on an industrial scale is possible. When considering the above, the operability is not always satisfactory.

Therefore, in order to use the powdered anion exchange resin on an industrial scale, it is essential to secure liquid permeability.

As a technique for ensuring liquid permeability, it may be considered to use a powder adsorbent mixed with a filter aid (diatomaceous earth, cellulose fiber, etc.) by a precoat filtration method. However, the biggest difficulty of the filter body composed of the powder anion exchange resin and the above-mentioned filter aid is that the filtration resistance is remarkably increased by the regeneration operation (acid treatment, alkali treatment),
In extreme cases, the flow operation itself becomes infeasible.

Further, in the conventional precoat filtration method, the adsorbent and the filter aid are assumed to be disposable, and the thickness of the adsorbent layer is up to about 20 mm. Therefore, it is very difficult to apply the conventional precoat filtration method as it is and recycle and reuse the powder anion exchange resin as the adsorbent.

Another technique for ensuring liquid permeability is to reduce the amount of the powdered anion exchange resin used. In order to enable the regeneration operation with a small amount, improve the filterability by regranulating while maintaining the characteristics of the powdered anion exchange resin, or filter it extremely against the equipment volume. It is impractical to develop a solid-liquid separation device with a large area.

Therefore, the present invention has been proposed in view of the above conventional circumstances, and shows good liquid permeability even when a powder anion exchange resin is used as an adsorbent, and the regenerating operation is extremely simple. It is an object of the present invention to provide a fibrous adsorbent capable of repeatedly reusing the powder anion exchange resin on an industrial scale. Furthermore, the present invention can be used as an alternative in most fields where purification operations have been carried out using activated carbon, bone charcoal, granular ion exchange resin, etc., such as various types of wastewater and sugar solution cleaning, decolorization, decolloid, softening, An object of the present invention is to provide a solution processing method and a solution processing apparatus capable of efficiently and economically removing harmful components, removing turbid components, and adjusting pH.

[0010]

[Means for Solving the Problems] In order to enable a regeneration operation of a powder anion exchange resin on an industrial scale and to broaden the range of application of the powder anion exchange resin, an easy-to-use form, that is, solid-liquid separation is used. It needs to be in an easy form. That is, it is necessary to create an adsorbent that is difficult to consolidate and has a low filtration resistance.

The present inventors thought that solid-liquid separation could be facilitated by mixing fibers having a certain length with powdered anion exchange resin, and selected fibers that meet this purpose. Therefore, various fibers were examined for their affinity with the powder anion exchange resin.

As a result, all the fibers showed a certain degree of affinity with the powder anion exchange resin, but if the fibers and the powder anion exchange resin were simply mixed, disturbances would occur and acid treatment would occur. It was found that the powder anion exchange resin easily separated from the fiber when applied. Therefore, the component with the opposite charge to the powder anion exchange resin,
For example, when the powder cation exchange resin was mixed, the affinity between the fiber and the powder ion exchange resin was remarkably improved, and an adsorbent that was fairly stable against disturbance such as a mixing operation was obtained.

The fibrous adsorbent of the present invention has been completed based on the above findings, and has an average particle size of 1.5 to 25.
The present invention is characterized in that cut fibers are added to an aggregate produced by mixing 0 μm of a powder anion exchange resin with at least one kind of powder cation exchange resin, diatomaceous earth and cellulose fiber.

In the present invention, a powder anion exchange resin is used as the adsorbent. As the powder anion exchange resin that can be used, a copolymer of styrene and divinylbenzene or a copolymer of acryl and divinylbenzene is used as a base, and quaternary ammonium, tertiary amine, secondary amine, polyamine, amino group, etc. Are fine particles of a strong basic anion exchange resin, a medium basic anion exchange resin, and a weak basic anion exchange resin each having a strong basic group, a medium basic group, and a weak basic group as an ion exchange group. Examples of the ionic form of the anion exchange resin include various salt forms such as Cl form and SO ₄ form in addition to the OH form. Particularly, the OH form strongly basic anion exchange resin or the Cl form strongly basic. Anion exchange resins are preferred.

The average particle size of the powdered anion exchange resin is preferably 250 μm or less. If the average particle size exceeds 250 μm, it becomes difficult to efficiently treat the liquid to be treated, and it becomes difficult to desorb the adsorbed substance mainly composed of the dye component, and the regeneration operation becomes difficult. On the other hand, if the average particle size is less than 1.5 μm, the risk of leak becomes particularly large, and the resin may be mixed in the solution to be treated. Therefore, the average particle diameter is preferably 1.5 to 250 μm, more preferably 5 to 100 μm.

As a method for producing the above-mentioned powdery anion exchange resin, a method of pulverizing a granular anion exchange resin or a method of industrially synthesizing can be considered, but pulverization is preferable. Further, examples of the pulverization method include an air flow type pulverization method, a freeze pulverization method, a mechanical pulverization method and the like, but it is preferable to use the air flow type pulverization method or the freeze pulverization method. This is because if heat is applied during pulverization, thermal deterioration may occur and the performance may deteriorate.

When a powdery anion exchange resin is prepared by pulverization, a new resin may be used as a raw material granular anion exchange resin, but it is used in various decolorization processes, desalting processes, etc. It is also possible to use a resin that cannot be recovered in capacity in the regenerative operation and is originally discarded. The economic effect of using such a used anion exchange resin as a raw material is extremely large, and it is also very beneficial from the viewpoint of environmental protection.

However, when the used anion exchange resin is pulverized and used, it is necessary to desorb the dye and the like accumulated by the regeneration operation. At this time, as the regenerative agent, an acid-containing solution such as hydrochloric acid or a metal ion-containing solution such as caustic soda-containing saline, or a mixed solution thereof can be used, but particularly acid-containing acetone, acid-containing methanol, or the like. Acid-containing organic solvent or metal ion-containing organic solvent such as methanol containing alkali metal ions (both can be mixed solutions with water)
Is effective.

The above-mentioned powder anion exchange resin contains at least one kind of powder cation exchange resin, diatomaceous earth, and cellulose fiber having an electric charge opposite to that of the powder anion exchange resin in order to enhance the affinity for the fiber. Add to form aggregates (so-called flocs). Here, the addition amount of the powder cation exchange resin, diatomaceous earth or cellulose fiber is 1/10 with respect to the powder anion exchange resin.
It is preferable to set the range to be 1/1. This is because when the addition amount of these components is less than the above range, the adsorption of the powder component to the fiber becomes insufficient, and conversely, when the addition amount is too large, the powder anion exchange resin becomes relatively small and the decolorizing effect is insufficient. This is because However, for example, in the field of water treatment for the purpose of removing heavy metals, when the effect of the cation exchange resin is expected, an equivalent amount of the powder cation exchange resin to the powder anion exchange resin is used. The amount may be 10 times.

Further, in the present invention, by adding cut fibers to the agglomerate, a fibrous adsorbent that is difficult to compact and has a low filtration resistance. In addition, as the cut fiber to be added, a non-woven fiber having a length of 1 to 10 is used.
Those cut into mm are preferable, and those cut into 1 to 5 mm are more preferable. The types of fibers used are synthetic fibers,
Chemical fibers, natural fibers, inorganic fibers, etc. are optional, but for example, polypropylene, hydrophilic polypropylene, polyester, polyacrylonitrile, rayon, electred polypropylene, activated carbon fibers, etc. are compatible with powdery basic anion exchange resins. When the properties were examined, hydrophilic polypropylene fibers, polyester fibers and rayon were found to have excellent affinity with the powder ion exchange resin. Further, it was found that among fibers of the same material, thin fibers (having a smaller dN) have a higher affinity and hydrophilically processed fibers are more easily adsorbed.

Further, the development of new materials in the ceramic industry has been remarkable, and high performance ceramic fibers have been put on the market. Then, when the ceramic fiber was obtained and the affinity with the powdery strong basic anion exchange resin was examined, it was found that it had an affinity higher than any of the fibers used previously. However, it was also found that the ceramic fiber alone has a small porosity between the aggregates and the filterability is poor, and some kind of ingenuity is required.

As a result of repeated examinations by repeating trial and error, as a result, the ceramic fiber was mixed with the powder ion-exchange resin at a constant ratio (10/1 to 1/10), and the same amount as the ceramic fiber was added thereto. Double the amount of synthetic fiber,
By adding chemical fibers and carbon fibers and entwining each fiber sufficiently in an aqueous solution, it is possible to form an adsorbent that has a powder ion exchange resin that has an appropriate porosity and is difficult to consolidate and that has excellent filtration performance. It turned out to be possible.

That is, the ceramic fiber and the powder ion exchange resin are strongly bonded to each other, and in particular, when both the anion and cation ion exchange resins are present, they have a shape like a single substance. A preferable void is created by adding a fiber having a low affinity for the powder ion exchange resin (for example, polyester cut fiber etc.) to this so as to have expandability. Due to the synergistic action of these mixed substances, it is possible to prevent disturbance. An ideal fibrous adsorbent that is stable, stable, and hard to consolidate is formed. As a result, adsorbent layer height (thickness)
It is possible to operate with a filtration tower system of about 100 cm, and as described later, it is possible to perform flow-through purification treatment even for a high-viscosity solution (for example, sugar solution of Bx.67 or more) that cannot be achieved by ordinary cloth filtration. Become.

At this time, the ceramic fiber used is not necessarily in a cut shape, and may be in a cotton shape only for the purpose of adsorbing and capturing the powder anion exchange resin. In the case of the fibrous adsorbent of the present invention which is intended to be repeatedly reused, it is preferable that the form of the fiber is a cut fiber from the viewpoint of regeneration operation.

The ceramic fiber is obtained by electromelting a raw material containing alumina or silica as a main component and blowing it off with high-speed air to form a fiber, and most of its uses are high temperature refractory heat insulating materials. There is no example used for an application similar to the present invention. Specific examples of the ceramic fiber include Kao wool manufactured by Isolite Industrial Co., Ltd., and ceramic fiber manufactured by Nichias, trade name ceramic fiber, and alumina fiber.

The above is the constitution of the fibrous adsorbent of the present invention. By completing such an adsorbent, it becomes possible to fill the powder ion-exchange resin into the cartridge filter and use it. Will enable the production of a full-scale large-scale processing device on the premise of repeated reuse. That is, in the above-mentioned fibrous adsorbent, it is possible to provide operability close to that of a granular ion exchange resin while maintaining the performance of the powder ion exchange resin. For example, a filter bed should be filled with the adsorbent and used. Is possible.

Therefore, for the purification operation of the solution to be treated, it suffices to pass the solution to be treated through a cartridge filter, a filtration bed or the like packed with the above-mentioned fibrous adsorbents, as in the case of the granular ion exchange resin column. It is possible to secure the liquid permeability of. At this time, if the filtration bed filled with the ceramic fiber or cristobalite is arranged in the subsequent stage of the cartridge filter or the like filled with the fibrous adsorbent of the present invention, in the unlikely event that the powder anion exchange resin leaks. Can be reliably captured, and the risk of contamination with the processing solution can be avoided.

Examples of the solution to be treated include industrial water, industrial waste water, drinking water and the like, which can be applied to all water treatments.
It can also be applied to the purification of sugar solutions. in this case,
Bx. The sugar solution of 67 or more can be directly subjected to the flow purification treatment, and the refining operation of the high viscosity sugar solution, which has been difficult so far, can be greatly simplified.

Further, the above-mentioned fibrous adsorbent can be easily regenerated and reused by a regeneration operation. That is, when the capacity of the powder anion exchange resin decreases due to the treatment of the solution to be treated, the regenerated agent is passed through to remove the adsorbed substance such as the pigment component and recover the ability.

An acid-containing solution is used as the regenerant at this time. For example, 0.1-5% heated to 40 ℃ or higher
By passing the aqueous acid solution, not only the pigment component but also the suspended matter which is difficult to be desorbed can be easily desorbed. Examples of the acid used in the aqueous acid solution include hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, formic acid, acetic acid, and the like, and mineral acids such as hydrochloric acid are preferable.

A metal ion-containing solution (eg, saline) may be added to the acid aqueous solution, or an organic solvent such as methanol, ethanol, chloroform, hexane, or acetone may be added to further enhance the desorption effect. Is also possible.

It has also been found that the performance of the powder ion exchange resin is improved by further treating with the alkaline solution after treating with the acid aqueous solution. Therefore, the most preferable method for regenerating the fibrous adsorbent is to first pass a low-concentration (for example, 0.1 to 2%) acid aqueous solution heated to 40 ° C. or higher, and then pass an alkaline aqueous solution. That is. At this time, it is also possible to use, as the alkaline solution, a dilute alkaline solution of, for example, 0.5% or less that cannot be used for the regeneration of the granular ion exchange resin. Such a dilute alkaline solution can be used only for the regeneration of the powder ion exchange resin, and is advantageous from the economical point of view.

As the alkali, sodium hydroxide, potassium hydroxide, lithium hydroxide, ammonia or the like can be used, but calcium hydroxide can also be used. There is no example in which calcium hydroxide is used to regenerate an ion exchange resin, and it is actually disliked that it contaminates the resin. Therefore, the efficacy of calcium hydroxide as a regenerant is a unique action and effect found only in the regenerating operation of the powder ion exchange resin as found in the present invention, and the dilute alkaline solution described above can be used. Combined with this, it becomes possible to significantly reduce the cost of the regenerant.

[0034]

[Function] The powdered anion exchange resin has excellent adsorption efficiency for dyes and the like and is useful for decolorizing and purifying a solution. The processing operation is more complicated and the processing time is longer than that of the exchange resin.

On the other hand, in the present invention, a powder cation exchange resin having an opposite charge is mixed with the powder anion exchange resin to form an aggregate, which has a certain length. Since we have added cut fibers,
Consolidation is prevented, the affinity between the fiber and the powder ion-exchange resin is remarkably improved, and an adsorbent that is considerably stable against disturbance such as mixing operation can be obtained.

Therefore, for example, even if the thickness of the powder ion-exchange resin adsorbent is 20 mm or more, the flow-through operation can be performed, and the solution to be treated can be purified by the same operation and time as for the granular ion-exchange resin.

[0037]

EXAMPLES Specific examples to which the present invention is applied will be described in more detail with reference to experimental results.

Example 1 A test column having a diameter of 5 cm and a height of 40 cm was filled with a mixture of a powder ion exchange resin having the composition shown in Table 1 below and various fibers after stirring and condensing in water. .
A sugar solution having a solid content of 60% was passed therethrough at a flow rate of 200 ml / h at 60 ° C., and the pressure difference between the inlet and the outlet was examined. The results are shown in Table 2.
Shown in.

[0039]

[Table 1]

[0040]

[Table 2]

Example 2 Each adsorbent used in Example 1 and having a reduced purification capacity was regenerated under the following conditions, and the change in filterability after regeneration was examined in the same manner as in Example 1. The change in differential pressure was investigated. The results are shown in Table 3. <Regeneration Condition> 3.5 L of a 0.5% HCl aqueous solution heated to 70 ° C. was passed through and extruded and washed, and then 0.6 L of a 1% NaOH aqueous solution was passed through, extruded and washed and regenerated.

[0042]

[Table 3]

As is clear from the above test results, the powder resin alone (Nos. 1 and 2) cannot be operated because the filtration resistance is large with respect to the flow and the differential pressure becomes extreme. By using polyester fibers together (No. 3, 4), it is not comparable with the case of powder resin alone (No. 1, 2),
The operability has been improved, but as the playback is repeated,
The differential pressure rises. If only ceramic fibers and powder resin are used alone (No. 5, 6), the differential pressure is large and the operability is not good, but No. In the mixtures shown in Nos. 7 and 8, the generation of differential pressure is small and the operability is remarkably improved.

Example 3 A used granular ion exchange resin (mixture of a strongly basic anion exchange resin and a strongly acidic cation exchange resin), which has been used for desalting boiler water and has a reduced capacity, is crushed to 250 μm.
The following powder ion exchange resins were prepared. 50 g of this powder ion-exchange resin (dry product) is added to ceramic cut fiber (Nichias Co., trade name Bulk Shotless F-SL
An adsorbent was prepared by mixing 12.5 g of P) and 25 g of polyester-cut fiber (Kuraray Co., Ltd., trade name EPO4) in water and stirring. The same column as in Example 1 was packed with this adsorbent, and the purification effect was examined. The layer height (thickness) of the adsorbent is 25 cm.

<Characteristics of supplied sugar solution> Sugar concentration, Bx. 67 Color Value (Absorbance), -logT 420 nm, 1 cm, 0.073 -logT 720 nm, 1 cm; 0.025 FeO content, 50 mg / l pH 9 The same regeneration operation as in Example 2 was performed and repeatedly used, 10
The quality of the sugar solution purified after the cycle was examined. The results are shown in Table 4.
Shown in.

[0046]

[Table 4]

High concentrations (Bx.6) as seen in this experiment
The refining operation in 7) is the first operation that can be performed by applying the adsorbent based on the present invention. As a supplementary test, in the regeneration operation (HCl → NaOH), N
A similar test was conducted using 3 liters of a saturated aqueous solution of calcium hydroxide instead of aOH. As a result, the amount of pigment,
As a result, a high-quality refined treatment liquid was obtained which was as good or superior as to its clarity and change in differential pressure. (However, the alkaline agent is unsuitable for the purpose of removing hardness components.)

Example 4 The following experiment was conducted using refined sugar factory wastewater, assuming the operation of a large-scale apparatus in the adsorption tower system. Diameter 60c
A cylindrical reaction tower having a height of 100 cm and a height of 100 cm was prepared, and 0.5 kg of a mixed molded product of ceramic fiber and non-woven fiber (nylon) was added to the bottom of Cristobal stone to about 20 cm.
It was placed on a laid filter bed, and an adsorbent having a powder ion-exchange resin as a matrix and having the following composition was filled therein.

Then, the relationship between water flow conditions and differential pressure, dye (T420 nm, 1 cm), and turbidity were mainly examined. The water flow conditions were tested at room temperature and a flow rate (LV 10 m / h). The results are shown in Table 5.

<Adsorbent Composition> Powder strong basic anion exchange resin (dry product), 6 kg. Powdered weakly acidic cation exchange resin (dry stone), 1.2 kg. Ceramic fiber (Nichias), 1.5 kg. Polyester cut fiber (made by Toray), 3 kg. Layer height (thickness) of adsorbent: 30 cm

[0051]

[Table 5]

Using this apparatus, the same tests as in Examples 2 and 3 using a sugar solution as a supply solution were conducted, but there was no problem in scale-up, and similar results were obtained. From these results, it can be seen that it is possible to manufacture a large-scale adsorption tower device. In addition, in this example, the leak of the powder resin was completely prevented by the function of the non-woven fiber having the ceramic fiber laid in the lower portion as the base material.

Example 5 A granular ion-exchange resin cartridge (for pure water production, general-purpose product) was used, and an adsorbent made of the same ceramic cut fiber and non-woven fiber as in Example 4 was used at the bottom to provide a water outlet. Covered. Then, an adsorbent having the following composition was filled, and the purification effect was examined by using artificially prepared feed water by adding the following components to pure water.

<Properties of Water Supply> Cadmium content, 10 p. p. m. Ammonium ion content, 10 p. p. m. Residual chlorine content, 20 p. p. m. TOC (acetic acid), 50 p. p. m. Suspended substance content (diatomaceous earth 200 mesh or less), 50 p. p. m. Dye content (caramel); Absorbance; -logT420nm, 1cm, 0.650 -logT720nm, 1cm, 0.105 * The analysis was performed according to the wastewater analysis method JISKO102.

<Structure of Cartridge> Cartridge shape; external dimensions, 220 × 540 mm, composition of FRP adsorbent; powder strong basic anion exchange resin (dry product), 250 g powder strong acidic cation exchange resin (dry product) ), 750 g Ceramic cut fiber 125 g Polyacrylonitrile fiber 250 g Powdered activated carbon 250 g

Using the supplied water absorption, at room temperature, 200 l /
The cartridge filter was passed through at a flow rate of h. 1
m ³ process to to examine the quality of the purified water. During that time, the differential pressure did not rise above 1 kg / cm ² . <Test results> Properties of purified water (average) Cadmium content, undetectable ammonium ion content, undetectable residual chlorine content, 0 TOC (acetic acid), 0 suspended matter content (diatomaceous earth 200 mesh or less ), 0 Dye content (caramel); Absorbance; -logT420nm. 1 cm, 0.002-log T720 nm. 1 cm, 0.00

As is clear from the above test results, the water containing suspended substances and various harmful components was passed through the fibrous adsorbent according to the present invention so that these harmful components were almost completely removed. It has been removed. Further, the adsorbent having a reduced purification capacity was taken out of the cartridge, transferred to the tower of Example 4, and regenerated in the same manner as in Example 3, and then the same water flow test was repeated. Quality was maintained.

Example 6 The following test was carried out in order to investigate the affinity of various non-woven fibers for a powdery adsorbent. That is, filtration area 12 cm
^Using the vacuum filtration tester of No. ² , except the filter cloth, on the wire mesh support bed of 100 mesh, make a precoat layer of the following non-woven fibers, and 1 g of each of the powder strong basic anion exchange resin and powder activated carbon 500 ml of an aqueous solution suspended at a ratio of / 1 was passed through.

Composition of Nonwoven Fiber No. 1; Polyester cut fiber (Kuraray EPO4), 2 g No. 2; Ceramic fiber (Isolite bulk LS), 1 g + polyester cut fiber (Kuraray EPO4), 1 g No. 3; Ceramic fiber (Isolite bulk LS), 2 g Type of powder adsorbent Powder strong basic anion exchange resin (1 to 50 μ; A powder weakly acidic cation exchange resin (1 to 50 μ); B powder activated carbon; C A + B; D

The absorbance of the filtrate was measured at 720 nm. The results are shown in Table 6.

[0061]

[Table 6]

As can be seen from Table 6, 720n was obtained by passing the ceramic fiber-based layer.
The absorption of m is almost zero. This shows that the leakage of the powdered strong basic anion exchange resin and the powdered activated carbon was almost completely prevented, and the leakage was completely prevented by using the powdered anion exchange resin and the cation exchange resin together. It can be said that it was possible.

[0063]

As is apparent from the above description, in the present invention, the powder cation exchange resin having the opposite charge is mixed with the powder anion exchange resin to form an aggregate. Since the cut fiber having a certain length is added, it is possible to prevent the compaction, and it is possible to increase the affinity between the fiber and the powder ion exchange resin.

Therefore, even when the powder anion exchange resin is used as an adsorbent, good liquid permeability can be secured, the regeneration operation is extremely simple, and the powder anion exchange resin is repeatedly regenerated on an industrial scale. A fibrous adsorbent that can be used can be provided. Further, the above-mentioned fibrous adsorbent can be used as a substitute in most fields where purification operations have been performed using activated carbon, bone charcoal, granular ion exchange resin, etc., such as cleaning of various types of wastewater and sugar solution, and decolorization and decolorization. It is possible to provide a solution processing method and a solution processing apparatus capable of efficiently and economically performing colloid, softening, removal of harmful components, removal of suspended components, pH adjustment, and the like.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display area C02F 1/42 B C13D 3/12

Claims (13)

[Claims] 1. A ceramic fiber is added to an aggregate produced by mixing a powder anion exchange resin having an average particle diameter of 1.5 to 250 μm and at least one of a powder cation exchange resin, diatomaceous earth and cellulose fiber. A fibrous adsorbent made of. 2. A ceramic fiber and a polyester in an aggregate produced by mixing a powder anion exchange resin having an average particle size of 1.5 to 250 μm and at least one of a powder cation exchange resin, diatomaceous earth and cellulose fiber. A fibrous adsorbent obtained by adding a mixture of fibers. 3. A powder anion exchange resin having an average particle size of 1.5 to 250 μm and a powder cation exchange prepared by pulverizing a used granular anion exchange resin whose ability has been reduced by purification of water or sugar solution. A fibrous adsorbent obtained by adding cut fibers to an aggregate produced by mixing at least one of resin, diatomaceous earth, and cellulose fiber. 4. The fibrous adsorbent according to claim 3, wherein the cut fiber is a ceramic fiber. 5. The fibrous adsorbent according to claim 3, wherein the cut fiber is a mixture of ceramic fiber and polyester fiber. 6. A solution processing method, which comprises passing a solution to be processed through the fibrous adsorbent according to claim 1. 7. The solution processing method according to claim 6, wherein the solution to be processed is a sugar solution. 8. The solution treatment method according to claim 6 or 7, wherein the fibrous adsorbent having a reduced ability is regenerated by passing the solution to be treated and repeatedly used. 9. By contacting a fibrous adsorbent having a reduced ability due to passing of a solution to be treated with a 0.1-5% mineral acid solution heated to 40 ° C. or higher, and then contacting with an alkaline aqueous solution. The solution processing method according to claim 8, wherein the solution processing method is regeneration. 10. The solution processing method according to claim 9, wherein the alkaline aqueous solution is a calcium hydroxide aqueous solution. 11. A solution processing apparatus comprising a packed column filled with the fibrous adsorbent according to claim 1, and a filtration bed arranged in the subsequent stage. 12. The solution processing apparatus according to claim 11, wherein the filter bed is a filter bed filled with cristobalite. 13. The solution treatment apparatus according to claim 11, wherein the filtration bed is a filtration bed filled with a fibrous body mainly composed of ceramic fibers.