JPH10237471A - Dispersion stabilizer for carbonaceous powder slurry - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a high-concentration slurry capable of pipeline transportation and stable for a long term by dispersing a coal powder or an oil coke powder. SOLUTION: This stabilizer comprises a formaldehyde cocondensate of a polyxcyalkylene monoglycidyl ether (A represented by the formula (wherein R1 is a 1-20C alkyl or a phenyl; AO and BO are each a 2-5C oxyalkylene, AOs or BOs have block and/or random arrangements, and m and n are each an integer of 0-100, provided that 100>=m+n>=4), a monomer (B) capable of formaldehyde cocondensation with component A and a compound (C) forming a sulfo groups.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a dispersant for slurry of carbonaceous powder. More specifically, the present invention relates to a dispersion stabilizer for dispersing, for example, coal powder or oil coke powder in water to obtain a high-concentration slurry that is stable for a long period of time in a state where pipeline transportation is possible.

[0002]

2. Description of the Related Art In recent years,
Although oil is the largest source of energy worldwide, its resources are unevenly distributed and its reserves may be depleted, sometimes leading to global supply uncertainty. Therefore, early development of alternative energy to petroleum is desired to reduce dependence on petroleum. Among them, coal that is widely available worldwide and can be supplied stably at low cost is being reviewed. It is also conceivable to use, as an energy source, oil coke generated as a distillation residue when pyrolyzing a heavy fraction in petroleum refining. At this time, the problem is that coal and oil coke are solid, so they are poorly handled, cannot be transported by pipeline like oil, and are extremely disadvantageous in handling. In order to solve this, various methods have been studied for powdering coal or oil coke, dispersing the same in a liquid such as water, oil or methanol, and transporting and storing the slurry. Among them, the one in which coal or oil coke powder is dispersed in water is currently regarded as the most promising.

[0003] Here, when coal powder or oil coke powder is dispersed in water, it is desired to increase the concentration as much as possible from the viewpoint of a decrease in calorific value and an increase in transportation cost. However, when the concentration of these slurries is increased, the viscosity is remarkably increased and the fluidity is lost. Therefore, when these powders are dispersed in water, use of various dispersants has been attempted. Examples of various dispersants include naphthalene sulfonic acid formaldehyde condensate (Japanese Patent Publication No. 60-6395) and melamine sulfonic acid formaldehyde polycondensate (Japanese Unexamined Patent Publication No.
No. 7-133192), lignin sulfonate (Japanese Patent Publication No. 28798/1991), polystyrene sulfonate (Japanese Patent Application Laid-Open No. 03-200893), and a copolymer salt of (meth) acrylic acid and a vinyl monomer (Japanese Patent Publication No. Kosho 62-
No. 52791), hydroxyethanediphosphonate, nonylphenol condensate etherene oxide adduct (Japanese Patent Application Laid-Open No. 59-80320), and an addition polymer of polyethylene polyamine and alkylene oxide (Japanese Patent Publication No. Hei.
-43957) and the like. However,
These dispersants are not satisfactory in terms of fluidity and dispersion stability in practical use.

[0004]

DISCLOSURE OF THE INVENTION The present inventors have conducted intensive studies to improve the fluidity and dispersion stability at high concentrations, which are disadvantages of carbonaceous powder slurries such as coal and oil coke. When a compound having a specific structure is used as a dispersant, it has been found that the compound has an excellent dispersing effect, and the present invention has been accomplished.

That is, the present invention provides a polyoxyalkylene monoglycidyl ether (A) represented by the following general formula (I):
And a dispersion stabilizer for carbonaceous powder slurry comprising a formaldehyde co-condensate of a monomer (B) capable of formaldehyde co-condensation with polyoxyalkylene monoglycidyl ether (A) and a compound (C) that forms a sulfone group. General formula (I) Here, R ₁ : an alkyl group having 1 to 20 carbon atoms, a phenyl group AO, BO: an oxyalkylene group having 2 to 5 carbon atoms AO and BO are block and / or random m, n: an integer of 0 to 100. However, 100 ≧ m + n ≧ 4.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail. The polyoxyalkylene monoglycidyl ether (A) represented by the following general formula (I) is used in the present invention. General formula (I) Here, R ₁ : an alkyl group having 1 to 20 carbon atoms, a phenyl group AO, BO: an oxyalkylene group having 2 to 5 carbon atoms AO and BO are block and / or random m, n: an integer of 0 to 100. However, 100 ≧ m + n ≧ 4 The compounds represented by the general formula (I) polyoxyalkylene monoglycidyl ether (A) include phenol polyoxyethylene glycidyl ether, phenol polyoxypropylene glycidyl ether, phenol polyoxyethylene oxypropylene glycidyl ether. , Lauryl alcohol polyoxyethylene glycidyl ether,
And polyoxyalkylene glycidyl ethers such as lauryl alcohol polyoxypropylene glycidyl ether and lauryl alcohol polyoxyethylene oxypropylene glycidyl ether. This oxyalkylene group has 2 to 5 carbon atoms. This oxyalkylene may be of one type, or may be one in which two or more types of oxyalkylene are bonded in a block or random manner. The number of repeating units is 4 to 100, and more preferably 7 to 70.

The step of adding the compound represented by the general formula (I) may be any step of synthesizing the co-condensate of the present invention. That is, it may be previously charged into the reaction apparatus at the start of the reaction, or may be added immediately before or immediately after pH adjustment when formaldehyde co-condensation reaction is performed under the condition of a weakly acidic pH.

The compounds represented by the general formula (I) can be used in combination of one or more kinds. Further, the addition amount is preferably 0.005 to 0.5 mol, more preferably 1 mol, per 1 mol of the monomer (B) capable of co-condensing polyoxyalkylene monoglycidyl ether (A) with formaldehyde. 0.01-0.35 mol is preferred.

The monomer (B) capable of co-condensing polyoxyalkylene monoglycidyl ether (A) with formaldehyde is represented by the general formula (II) Here, X ₁ X ₂ X ₃ : H, CH ₂ OH or CH ₂ SO
₃ Y Y: alkali metal, alkaline earth metal, ammonium,
Compounds represented by amines and substituted amines, that is, melamine, melamine having a methylol group, melamine having a sulfomethyl group, and the like can be used. In the case of sulphomethyl group-containing melamine, salts thereof can also be used. As the salts, inorganic salts, that is, alkali metal salts or alkaline earth metal salts such as potassium, sodium, and magnesium, and organic salts, that is, ammonium salts, monoethanolamine salts, diethanolamine salts, and the like can also be used. Among them, melamine and sulfomethyl group-containing melamine are preferred from the viewpoint of economy and reactivity.

In addition, other than the above, general formula (III) Here, X ₄ : H, CH ₂ OH or CH ₂ SO ₃ Y, ammonium salt, amine salt, substituted amine salt Y: alkali metal, alkaline earth metal, ammonium,
An amine, a substituted amine sulfone group, or an alkali metal salt thereof, an alkaline earth metal, a compound represented by R ₃ : H or an alkyl group having 1 to 6 carbon atoms,
That is, alkylphenols such as phenol, cresol, pt-butylphenol, and pt-amylphenol, or sulfonic acids or sulfonic acid salts thereof can also be used. As the salts, similarly to the general formula (II), inorganic salts and organic salts thereof can be used.

Furthermore, the general formula (IV) Here, X ₅ and X ₆ : H, CH ₂ OH or CH ₂ SO ₃
Y Y: alkali metal, alkaline earth metal, ammonium,
Compounds represented by amines and substituted amines, that is, urea, urea containing a methylol group, and urea containing a sulfomethyl group can also be used. In the case of a sulfomethyl group-containing urea, inorganic salts and organic salts thereof can be used as in the case of the general formula (II).

Further, the general formula (V) Here, X ₇ : H, an alkali metal, an alkaline earth metal,
Ammonium, amine, substituted amine R ₃ : a compound represented by H or an alkyl group having 1 to 6 carbon atoms,
That is, aminobenzenesulfonic acids such as sulfanilic acid, metanic acid, and ternic acid, or salts thereof can be used. As the salts, similarly to the general formula (II), inorganic salts and organic salts thereof can be used.
Among them, sulfanilic acid, metanic acid and salts thereof are preferable from the viewpoint of economy and reactivity.

In the present invention, general formula (II):
Formula (III), Formula (IV), and Formula (V)
One or more monomers may be used in combination, but it is preferable to use the general formula (II) from the viewpoint of economy and reactivity.

As the compound that generates a sulfone group, known sulfonating agents such as sodium sulfite, sodium bisulfite, sodium pyrosulfite, sulfur dioxide, fuming sulfuric acid and the like can be used. These sulfonating agents have been previously prepared by the general formulas (II), (III) and (IV)
May be used when introducing a sulfomethyl group into the raw material corresponding to the above. Alternatively, a sulfomethyl group may be directly introduced into the cocondensate by acting after synthesizing a cocondensate with formaldehyde.

The method for introducing a sulfomethyl group into melamine can be carried out by a known method. That is, it can be introduced by adding and condensing melamine with formaldehyde to form methylol melamine, followed by the action of a sulfonating agent and replacement with a hydroxyl group. It is known that 6 mol of formaldehyde is addition-condensed as methylol group to 1 mol of melamine. In the present invention, since 2 moles of methylol groups are likely to be used for cocondensation, sulfomethyl groups can be introduced into the remaining 4 moles of methylol groups at the maximum. Considering the economic aspect and the dispersing effect of the obtained co-condensate, the amount of sulfomethyl group to be introduced is preferably from 0.3 to 4 mol, more preferably from 0.5 to 2 mol.

The same applies to the case where a sulfomethyl group is introduced into phenol.
２2 mol is preferable, and more preferably 0.5 to 2 mol.
Introduction of .about.1.5 mol is preferred. Further, the same applies to the case where a sulfomethyl group is introduced into urea, and the amount of introduction is preferably from 0.3 to 2 mol, more preferably from 0.5 to 1.5 mol, per mol of urea.

The formaldehyde used for synthesizing these formaldehyde cocondensates is usually 3
Those having a concentration of 0 to 60% by weight can be used. Further, if necessary, paraform can be used in combination. The amount of formaldehyde to be used is preferably 1 to 6 times the total number of moles of the polyoxyalkylene monoglycidyl ether (A) and the total number of monomers (B) capable of formaldehyde cocondensation. In consideration of economy, ease of the condensation reaction, and the like, it is more preferable to use 1.5 to 4 moles. Formaldehyde co-condensation reaction is pH
It is carried out by a usual method in the range of 4 to 12, that is, from a weakly acidic region to a basic region. The formaldehyde may be added in advance in the reactor or may be added dropwise during the reaction.

The composition of the compound constituting the dispersion stabilizer for carbonaceous powder slurry (hereinafter simply referred to as dispersion stabilizer) in the present invention is important. That is, the molar ratio of polyoxyalkylene monoglycidyl ether (A): polyoxyalkylene monoglycidyl ether (A) and a monomer capable of co-condensing with formaldehyde (B): a compound that produces a sulfone group (C): , (0.00
5: 0.5): 1: (0.3-4) :( 1-6). More preferably, (0.01-0.
35): 1: (0.5-2) :( 1.5-4) is preferred.

The amount of the dispersion stabilizer in the present invention varies depending on the type of the carbonaceous powder, but is generally preferably 0.05 to 3.0% by weight based on the carbonaceous powder.
More preferably, the content is 0.5 to 2.0% by weight.

The dispersion stabilizer of the present invention may be used alone or in combination with one or more other known dispersants. Other known dispersants include, for example, naphthalene sulfonic acid formaldehyde condensate (hereinafter, referred to as naphthalene-based), melamine sulfonic acid formaldehyde polycondensate (hereinafter, referred to as melamine-based), lignin sulfonic acid salt (hereinafter, referred to as melamine sulfonic acid salt). Lignin type), polystyrene sulfonate (hereinafter referred to as polystyrene type), polyoxyethylene alkyl phenyl ether, poly (meth) acrylate, polyoxyethylene alkyl ether sulfate, (meth) acrylic acid and vinyl monomer A copolymer salt of (meth) acrylic acid with a vinyl monomer having a polyoxyalkylene glycol chain in the molecule, hydroxyethanediphosphonate, nonylphenol condensate ethylene oxide adduct, polyethylenepolyamine and alkylene Oxide Pressurized polymer and the like.

Further, the dispersion stabilizer of the present invention can be used in combination with one or more other known water-soluble polymers in order to further improve the dispersion stability. Other known water-soluble polymers include methylcellulose, carboxymethylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose,
Hydroxypropyl methylcellulose, cellulose derivatives such as sulfoethylcellulose alkali metal salts, polyvinyl alcohol and derivatives thereof, starch and derivatives thereof, sodium alginate, casein, xanthan gum, tamarind gum, natural polymers such as guar gum and derivatives thereof, curdlan, Microbial polysaccharides such as β-1,3-glucan such as paramylon and welan gum; high molecular weight copolymers of acrylic acid or unsaturated polybasic acid with other vinyl monomers; polyacrylamide or acrylamide and other High molecular weight products of copolymers with a vinyl monomer are exemplified.

The dispersion stabilizer of the present invention imparts excellent fluidity to the carbonaceous powder slurry, maintains the dispersion stability without forming a hard pack over a long period of time, and makes it possible to increase the concentration of the slurry. Although the reason is not clear, it is speculated as follows. That is, since the dispersion stabilizer of the present invention has a sulfone group in the molecule, its electric repulsion enhances the dispersibility of the carbonaceous fine particles. Further, when the dispersion stabilizer of the present invention is adsorbed on the carbonaceous fine particles, it is considered that the polyoxyalkylene group contained in the molecule extends to the outside of the particles. A hydration layer is formed around the polyoxyalkylene group extending outward, and it is expected that the steric hindrance effect will keep the dispersibility of the carbonaceous fine particles for a long time and will not cause a hard pack. .

The dispersion stabilizer of the present invention will be described in more detail in the following examples, but the present invention is not limited thereto. In addition, all percentages or parts described below as units of numerical values are% by weight or parts by weight unless otherwise specified.

[0024]

【Example】

Production Example 1 0.52 mol (65.5 parts) of melamine, 3.0 mol (243.2 parts) of 37% formalin, and 250.0 parts of water were mixed with a stirrer, a thermometer, a reflux tube, and a dropping funnel. The mixture was charged into a one-necked flask and mixed with stirring. After the temperature was raised to 65 ° C., the pH was adjusted to 11.5 with a 25% aqueous sodium hydroxide solution.
The reaction was performed at 65 ° C. for 1 hour. Add 0.2 mole of urea (1
2.0 parts) and 0.15 mol of sulfanilic acid (26.0).
Was added and the mixture was further reacted at 70 ° C. for 1 hour. Next, 131.4 parts of water was added, and at the same time, the mixture was cooled to 45 ° C. Then, 0.13 mol (12.2 parts) of phenol was added thereto over 30 minutes using a dropping funnel. After completion of the charging, the reaction was carried out at 60 ° C. for 1 hour. Subsequently, lauryl alcohol (E
O) Denacol EX-1 which is a 15 glycidyl ether
71 (manufactured by Nagase Kasei Kogyo Co., Ltd.) at 0.03 mol (2
7.1 parts), anhydrous sodium bisulfite 0.53 mol (5
5.1 parts) and reacted at 80 ° C. for 1 hour. 60
After cooling to 40 ° C., the pH was adjusted to 6.0 with 40% sulfuric acid,
C. and the reaction was carried out, and the viscosity of the reaction solution was 40 cp / 2.
When the temperature reached 5 ° C., the reaction was stopped by neutralization with a 25% aqueous sodium hydroxide solution. The composition and physical properties are shown in Table 1.

Production Example 2 647.8 parts of water, 3.1 mol of 37% formalin (25 mol
(1.4 parts) was charged into a four-necked flask equipped with a stirrer, a thermometer, and a reflux tube, followed by stirring and mixing. 0.7 mol (88.2 parts) of melamine and 0.1 mol of urea (6.
0 parts), 0.2 mol (34.6 parts) of sulfanilic acid and 0.5 mol (95.0 parts) of sodium pyrosulfite were added with stirring. After raising the temperature to 75 ° C. and confirming that a transparent liquid was obtained, 0.13 mol (117.3 parts) of Denacol EX-171 used in Production Example 1 was added, and then 25% sodium hydroxide was added. PH 11 with aqueous solution, 7
The reaction was performed at 5 ° C. for 2 hours. After confirming that free sulfite ions had disappeared, the mixture was cooled to 60 ° C. Then 4
The pH was adjusted to 6.0 with 0% sulfuric acid, the reaction was allowed to proceed at 60 ° C., and when the viscosity of the reaction solution reached 50 cp / 25 ° C., 25%
The reaction was terminated by neutralization with an aqueous sodium hydroxide solution, and the resulting product was used as condensate 2. The composition and physical properties are shown in Table 1.

Production Example 3 352.3 parts of water and 2.8 mol of 37% formalin (22 moles)
7.0 parts) was charged into a four-necked flask equipped with a stirrer, a thermometer, and a reflux tube, followed by stirring and mixing. 1.0 mol (126.0 parts) of melamine is added to the flask with stirring.
This was heated to 70 ° C., and after confirming that it became a transparent liquid, 0.1 mol (37%) of denacol EX-145 (manufactured by Nagase Kasei Kogyo Co., Ltd.), which is phenol (EO) 5 glycidyl ether. 0.0 part) 25% aqueous sodium hydroxide solution to adjust the pH to 11, and reacted at 70 ° C for 1 hour. Next, the mixture was cooled to 55 ° C, and anhydrous sodium bisulfite 0.8 (83.2 parts) was added. Although the internal temperature increased by the addition of anhydrous sodium bisulfite, the temperature was further increased to 80 ° C. The reaction was continued at 80 ° C., and after confirming that free sulfite ions had disappeared, the mixture was cooled to 60 ° C. Next, the pH was adjusted to 6.0 with 40% sulfuric acid, the reaction was allowed to proceed at 60 ° C, and when the viscosity of the reaction solution reached 115 cp / 25 ° C, the reaction was neutralized with a 25% aqueous sodium hydroxide solution to stop the reaction. The obtained product was designated as condensate 3. The composition and physical properties are shown in Table 1.

Production Examples 4 and 5 Condensation was carried out in the same manner as in Production Example 1, except that the composition and final viscosity of the compounds were changed as shown in Table 1. As a result, condensate 4
~ 5.

Production Examples 6 and 7 Condensation was carried out in the same manner as in Production Example 2 while changing the compound composition and final viscosity as shown in Table 1. As a result, the condensate 6-
7 was obtained.

Production Examples 8 and 9 Condensation was carried out in the same manner as in Production Example 3 while changing the composition and final viscosity of the compounds as shown in Table 1. As a result, the condensate 8 ~
9 was obtained.

Production Example 10 Condensation was carried out in the same manner as in Production Example 1 except that the compound represented by the general formula (l) was not used, and the composition and final viscosity of the compound were changed as shown in Table 1. As a result, a condensate 10 was obtained.

Production Examples 11 to 12 Using Denacol EX-171 used in Synthesis Example 1, condensation was carried out in the same manner as in Production Example 1 while changing the compound composition and final viscosity as shown in Table 1. As a result, the condensates 11 to 1
2 was obtained.

[0032]

[Table 1]

Example 1 As described below, a water slurry of coal powder and a water slurry of oil coke powder were prepared by using the condensate 1 synthesized in Production Example 1 as a carbonaceous powder slurry. The stability was evaluated. Table 2 shows the results.

1. Preparation of Carbonaceous Powder Slurry Coal used was Australian coal containing 95% of 200 mesh passes. A predetermined amount of the dispersion stabilizer of the present invention, or a comparative dispersion stabilizer, or a comparative dispersant is put in water in advance, and a predetermined amount of coal powder is gradually added thereto, and dispersed with a homomixer at 3000 rpm for 25 minutes. hand,
It was a coal slurry. Oil coke was obtained by coarsely pulverizing an oil coke mass obtained from Ube Ammonia Industry Co., Ltd. with a jaw crusher, and then pulverizing with a Nara free pulverizer to obtain a 50% particle size of 27 μm and a 90% particle size of 95 μm. . This was used as an oil coke slurry in the same manner as the coal slurry.

2. Evaluation of Fluidity The carbonaceous powder slurry obtained by the above preparation method was heated to a predetermined temperature, and the viscosity was measured with a Brookfield viscometer. The viscosity measurement after 7 days was also performed.

3. Evaluation of dispersion stability After preparing the carbonaceous powder slurry, the slurry was transferred to a 100 cc polycup so that the height of the slurry was 45 mm from the bottom. Using a bigger needle specified in JIS R5201, the drop distance of the needle for 10 seconds by its own weight was measured. Further, the slurry that had been allowed to stand for 7 days was measured to be used as an index of dispersion stability. Incidentally, the shorter the falling distance, the lower the dispersion stability.

Examples 2 to 12 Except that the condensates 2 to 9 obtained in Production Examples 2 to 9 were used,
The same test as in Example 1 was performed. The results are shown in Table 2.

Comparative Examples 1 to 3 The same tests as in Example 1 were conducted except that the condensates 10 to 12 obtained in Production Examples 10 to 12 were used. The results are shown in Table 2.

Comparative Examples 4 to 7 Commercially available Melflow 40 (Mitsui Toatsu Chemical Co., Ltd .: melamine type) and Mighty 150 as dispersants for comparison and control.
(Kao Corporation: naphthalene-based), Glarion (Lion Corporation: polystyrene-based), WESCHEM Na-1
(Georgia Pacific Co., Ltd .: lignin system) was used to perform the same operation as in Example 1. Table 2 shows the results.

[0040]

[Table 2]

[0041]

As is clear from the examples and comparative examples, the dispersion stabilizer for carbonaceous powder obtained according to the present invention shows a high dispersing effect at a low addition amount as compared with existing dispersants, And it has excellent dispersion stability. In other words, it is possible to easily increase the concentration of the slurry, and significant advantages such as an increase in heat generation, a reduction in transportation cost, and an improvement in storability are expected.

Continued on the front page (72) Inventor Yoshihiko Tomita 7-1-1, Hikoshimasako-cho, Shimonoseki-shi, Yamaguchi Pref.

Claims (11)

[Claims] 1. A polyoxyalkylene monoglycidyl ether (A) represented by the following general formula (I), a monomer (B) capable of co-condensing polyoxyalkylene monoglycidyl ether (A) with formaldehyde, and a sulfone group A dispersion stabilizer for carbonaceous powder slurries consisting of a formaldehyde co-condensate with the compound (C) that produces the above. General formula (I) Here, R ₁ : an alkyl group having 1 to 20 carbon atoms, a phenyl group AO, BO: an oxyalkylene group having 2 to 5 carbon atoms AO and BO are block and / or random m, n: an integer of 0 to 100. However, 100 ≧ m + n ≧ 4 2. The polyoxyalkylene monoglycidyl ether (A) and formaldehyde co-condensable monomer (B) are melamine or a derivative thereof, phenol or a derivative thereof, urea or a derivative thereof, aminobenzenesulfonic acid or a derivative thereof. The dispersion stabilizer for a carbonaceous powder slurry according to claim 1, comprising one or two or more compounds selected from the group consisting of a derivative, alkylaminobenzenesulfonic acid or a derivative thereof. 3. A compound (C) which forms a sulfone group
The dispersion stabilizer for a carbonaceous powder slurry according to claim 1, wherein the dispersion stabilizer comprises one or more compounds selected from the group consisting of sodium sulfite, sodium bisulfite, sodium pyrosulfite, fuming sulfuric acid, and sulfur dioxide. 4. The dispersion stabilizer for a carbonaceous powder slurry according to claim 2, wherein the melamine or a derivative thereof is represented by the following general formula (II). General formula (II) Here, X ₁ X ₂ X ₃ : H, CH ₂ OH or CH ₂ SO
₃ Y Y: alkali metal, alkaline earth metal, ammonium,
Amine, substituted amine 5. The dispersion stabilizer for a carbonaceous powder slurry according to claim 2, wherein the phenol or a derivative thereof is represented by the following general formula (III). General formula (III) Here, X ₄ : H, CH ₂ OH or CH ₂ SO ₃ Y, a sulfone group, or an alkali metal or alkaline earth metal thereof,
Ammonium, amine, substituted amine Y: alkali metal, alkaline earth metal, ammonium,
Amine, substituted amine R ₃ : H or alkyl group having 1 to 6 carbon atoms 6. The dispersion stabilizer for a carbonaceous powder slurry according to claim 2, wherein the urea or a derivative thereof is represented by the following general formula (IV). General formula (IV) Here, X ₅ and X ₆ : H, CH ₂ OH or CH ₂ SO ₃
Y Y: alkali metal, alkaline earth metal, ammonium,
Amine, substituted amine 7. The dispersion stabilizer for a carbonaceous powder slurry according to claim 2, wherein the aminobenzenesulfonic acid or a derivative thereof or the alkylaminobenzenesulfonic acid or a derivative thereof is represented by the following general formula (V). General formula (V) Here, X ₇ : H, an alkali metal, an alkaline earth metal,
Ammonium, amine, substituted amine R ₃ : H or an alkyl group having 1 to 6 carbon atoms 8. The dispersion stabilizer for carbonaceous powder slurry according to claim 2, wherein the monomer (B) capable of co-condensing the polyoxyalkylene monoglycidyl ether (A) with formaldehyde is melamine. 9. The dispersion stabilizer for a carbonaceous powder slurry according to claim 2, wherein the monomer (B) capable of co-condensing the polyoxyalkylene monoglycidyl ether (A) with formaldehyde is phenol. 10. The dispersion stabilizer for a carbonaceous powder slurry according to claim 2, wherein the monomer (B) capable of co-condensing the polyoxyalkylene monoglycidyl ether (A) with formaldehyde is urea. 11. The dispersion stabilizer for a carbonaceous powder slurry according to claim 2, wherein the monomer (B) capable of co-condensing polyoxyalkylene monoglycidyl ether (A) with formaldehyde is sulfanilic acid.