JPH0366936B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention is applicable to nitrogen, methane, carbon dioxide, hydrogen,
The present invention relates to a method for preparing a solid adsorbent composed of copper salt and activated carbon for adsorbing and separating carbon monoxide from a mixed gas containing carbon monoxide together with water.

(Prior art) Conventionally, as a solid adsorbent for separating carbon monoxide, which is mainly composed of copper and activated carbon, copper halide ()-activated carbon system (Japanese Patent Application Laid-open No. 156517/1982), copper ()
A salt-activated carbon system (JP-A-59-69414) is known.

The method for preparing copper halide ()-activated carbon adsorbent is to mix copper halide () with activated carbon in a solvent, stir it, and then remove the solvent by depressurizing, distilling, etc. Methods that use hydrochloric acid as a solvent have the disadvantage of severe corrosion of preparation equipment, etc., and adsorbents that use acetonitrile or the like as a solvent have the disadvantage of a small amount of carbon monoxide adsorption.

In copper() salt-activated carbon based adsorbents, copper()
An activation step was necessary because the salt does not inherently have the property of adsorbing carbon monoxide. This activation process is a heat treatment under an inert gas or reducing gas atmosphere, but it is not sufficiently effective due to the low heating temperature, and the amount of carbon monoxide adsorbed is also lower than that of halogen when hydrochloric acid is used as a solvent. The amount of copper oxide was lower than that of the activated carbon adsorbent.

(Problems to be Solved by the Invention) The present invention solves the conventional problems and provides a simple method for preparing a copper salt-activated carbon-based adsorbent for carbon monoxide separation that has higher performance than the conventional one. The purpose is to

(Means for Solving the Problems) The gist of the present invention for achieving the above object is the method described in the following items 1 to 5.

(1) After supporting activated carbon with a monovalent or divalent copper salt dissolved in a solvent and removing the solvent,
A method for preparing an adsorbent for separating carbon monoxide, which comprises heating to a temperature exceeding 250°C in a non-oxidizing atmosphere or under reduced pressure.

(2) When supporting a monovalent copper salt on activated carbon, copper halide (2) is dissolved in an organic solvent or a mixture thereof, then impregnated with activated carbon, excess organic solvent is removed, and the copper halide is dissolved. The method for preparing an adsorbent for separating carbon monoxide according to the above item 1, which comprises supporting () on activated carbon.

(3) When supporting a monovalent copper salt on activated carbon, copper halide () is made into an aqueous solution of copper ()-ammonium complex, then impregnated into activated carbon, moisture is removed, and the copper ()-ammonium complex is transferred to activated carbon. The method for preparing an adsorbent for separating carbon monoxide according to the above item 1, which comprises supporting the adsorbent on carbon monoxide.

(4) When supporting monovalent copper salt on activated carbon, copper halide () is dissolved in a solvent, then impregnated with activated carbon, the solvent is removed and activated carbon is supported, and then immersed in a solution of sulfites. 2. The method for preparing an adsorbent for carbon monoxide separation according to item 1 above, which comprises reducing copper () to copper () and then removing the solvent to support copper halide () on activated carbon.

(5) When supporting a divalent copper salt on activated carbon, the above step consists of dissolving the copper () salt in a solvent, impregnating the activated carbon, removing the solvent, and allowing the activated carbon to support the copper () salt. A method for preparing an adsorbent for carbon monoxide separation according to item 1.

As a result of intensive study to overcome the shortcomings of conventional methods,
Activated carbon after supporting monovalent or divalent copper salt and removing the solvent used to support the copper salt,
We have discovered a method of preparing a high-performance adsorbent for carbon monoxide separation by heat treatment at a higher temperature than conventionally known, and completed the present invention.

The present invention supports a monovalent or divalent copper salt,
In this method, after removing the solvent used to support the copper salt, the activated carbon is heat-treated in a non-oxidizing atmosphere or under reduced pressure to obtain an adsorbent for separating carbon monoxide.

Regarding the embodiments of the present invention, there are the following methods.

Copper halide () is mixed and stirred with activated carbon in an organic solvent, the solvent is removed by vacuum, heat distillation, etc., and this is heat treated in a non-oxidizing atmosphere or under reduced pressure to adsorb carbon monoxide for separation. How to use it as an agent.

Copper halide () is dissolved as a complex in a solution of ammonia or an ammonia-like compound, mixed and stirred with activated carbon, and then the solvent is removed by methods such as reduced pressure and heat distillation, and the solution is heat-treated in a non-oxidizing atmosphere or under reduced pressure. A method of using carbon monoxide as an adsorbent for separating carbon monoxide.

After supporting copper halide () on activated carbon, this is brought into contact with a reducing agent in the liquid phase.
A method of using salt-supported activated carbon as an adsorbent for carbon monoxide separation by heat-treating it in a non-oxidizing atmosphere or under reduced pressure.

This is a method in which a copper () salt is supported on activated carbon and then heat treated in a non-oxidizing atmosphere or under reduced pressure to obtain an adsorbent for separating carbon monoxide.

It is known that monovalent copper salts generally have the property of adsorbing carbon monoxide, whereas divalent copper salts do not have the property of adsorbing carbon monoxide. However, certain metal salts (mercury, iron, silver, gold, etc.)
It is known that the adsorbent of the present invention is reduced when adsorbed on activated carbon (JW Hassler, co-translated by Takashi Oda and Yoshitomo Eguchi, "Activated Charcoal", p. 206-207, Kyoritsu Shuppan Co., Ltd., 1966). In this case, it is thought that due to the action of activated carbon, copper () is reduced by heat treatment above a certain temperature to become copper (), which has the property of adsorbing carbon monoxide.

The activated carbon used in the present invention can be in various shapes, such as briquette coal, granular coal made of crushed coal, fibrous carbon, and powdered carbon. As raw materials for activated carbon, wood, coconut shells, coal, petroleum pitch, etc. are used, and a chemical activation method, a gas activation method, etc. can be applied to this activation method.

The copper halide (2) used in the present invention is a monovalent copper halide, and copper chloride (1), copper bromide (2), and copper iodide (2) can be used.

Examples of the organic solvent used in the present invention include various nitriles such as acetonitrile, propionitrile, benzonitrile, and benzylnitrile, and various nitriles such as pyridine, picoline, hexamethylphosphoric acid triamide (HMPA), and monoethanolamine (MEA). Organic solvents such as amines that can dissolve copper halides can be used.

In the present invention, the components forming a complex with the copper salt include, for example, ammonia, ammonium carbonate, ammonium hydrogen carbonate, and the like.

In addition, copper halide () used in the present invention
Or copper () salts include copper chloride (), copper bromide (), copper iodide (), copper sulfate, copper acetate, copper carbonate,
Examples include copper nitrate and copper formate.
Note that copper halide () is a halide of divalent copper.

In the present invention, examples of the solvent used when supporting copper () halide or copper () salt on activated carbon include water, basic aqueous solution, acetone, ethyl acetate, methyl alcohol, ethyl alcohol, acetonitrile, and propionic acid. Nitrile, etc.

The reducing agent used in the present invention is, for example, sodium sulfite, acetic acid sodium sulfite,
Sulfites such as ammonium sulfite and acidic ammonium sulfite.

Regarding the composition of the adsorbent for carbon monoxide separation in the present invention, the weight ratio of activated carbon to copper () salt is 1.0 to 75, preferably 2.0 to 12.0, and the weight ratio of activated carbon to copper () salt is 0.5 to 50. Preferably it is 1.5-8.0.

Activated carbon supporting a copper salt that can be applied to the present invention includes, for example, a copper () salt-activated carbon system, a copper () salt-activated carbon system, a copper complex-activated carbon system, etc., and a solid mainly composed of a copper salt or activated carbon. It is.

In the present invention, the activated carbon is heated at a temperature exceeding 250° C. after supporting the copper salt and removing the solvent used in supporting the copper salt. If the heating temperature is below 250°C, the activation treatment will not fully utilize the ability of the adsorbent. The maximum temperature varies depending on various factors, such as the type of solvent used to support the copper salt on activated carbon and the degree of pressure reduction, and is preferably 500° C. or lower. The preferred temperature range is about 260°C to 400°C.

The heating atmosphere is a non-oxidizing atmosphere or under reduced pressure. The copper salt-activated carbon-based adsorbent for carbon monoxide separation is
It has been confirmed that it deteriorates in the presence of oxygen,
Therefore, the heat treatment must be performed in a non-oxidizing atmosphere or under reduced pressure. The non-oxidizing atmosphere is a reducing atmosphere such as carbon monoxide, hydrogen, etc., or an inert atmosphere such as nitrogen, argon, etc. Also, under reduced pressure, it is 1 mm.
Hg or less is preferable.

The carbon monoxide separation adsorbent prepared according to the present invention selectively and rapidly adsorbs carbon monoxide. Further, the adsorbed carbon monoxide can be easily desorbed and released by heating at 90° C. or higher or by reducing pressure.

The adsorbent for carbon monoxide separation activated by the present invention can be used for PSA (Pressure Swing Adsorption) or
It can be used to separate and purify carbon monoxide using the TSA (Thermal Swing Adsorption) method, and can also be used to remove carbon monoxide from a mixed gas containing carbon monoxide.

After supporting copper halide () on activated carbon,
This is brought into contact with a reducing agent in the liquid phase to form copper() salt-supported activated carbon, which is then heat-treated in a non-oxidizing atmosphere or under reduced pressure to produce an adsorbent for carbon monoxide separation, which remains in the adsorbent. The presence of sulfites or sulfates, which is thought to do so, does not inhibit the adsorption and desorption of carbon monoxide; on the contrary, by reducing the surface area of the adsorbent to a certain extent, the amount of adsorption of nitrogen, carbon dioxide, etc. can be reduced. This helps to relatively increase the selective adsorption of carbon monoxide by making it smaller.

The present invention will be explained below with reference to Examples.

Example 1 Copper chloride () special grade reagent manufactured by Showa Kagaku Co., Ltd. was used as copper chloride (). Activated carbon is made by Tsurumicol Co., Ltd.
4GV and acetonitrile are from Wako Pure Chemical Industries.
A liquid chromatograph manufactured by Co., Ltd. was used.

1.5g (15.0mmol) in a 300ml round bottom flask
of copper chloride (), add 40 ml of acetonitrile, and stir at 25℃ using a magnetic stirrer.
It was left for 10 minutes. Activated carbon 10 in this round bottom flask
After stirring for 24 hours, the solvent was removed under reduced pressure using a rotary evaporator, and then heated at 300°C for 2 hours under reduced pressure (0.5 mmHg) to form a black granular adsorbent for carbon monoxide separation. Obtained.

The equilibrium adsorption amount of carbon monoxide of this adsorbent at 1 atmosphere was measured and was found to be 23.1 ml/g.

This adsorbent adsorbs carbon monoxide quickly, and after 1 minute it reaches 17.2 ml/g, which is approximately 75% of the equilibrium adsorption amount.
After 20 minutes, the equilibrium adsorption amount was 23.1ml/g.
adsorbed.

This adsorbent was then pumped for 20 minutes using a vacuum pump.
The adsorbed carbon monoxide was desorbed by applying reduced pressure (0.1 mmHg) at 25°C.

Thereafter, even if this adsorption and desorption operation was repeated, no change was observed in the carbon monoxide adsorption rate and adsorption amount.

Example 2 An adsorbent for carbon monoxide separation was prepared in the same manner as in Example 1, except that 40 ml of propionitrile (Wako Pure Chemical Industries, Ltd. special grade test) was used instead of 40 ml of acetonitrile described in Example 1. did.

As a result of measuring the equilibrium adsorption amount of this adsorbent for carbon monoxide and nitrogen at 1 atm, it was found that carbon monoxide
The nitrogen content was 24.3 ml/g, and the nitrogen content was 3.81 ml/g.

This adsorbent was then pumped for 20 minutes using a vacuum pump.
The adsorbed carbon monoxide was desorbed by applying reduced pressure (0.1 mmHg) at 25°C.

Thereafter, even if this adsorption and desorption operation was repeated, no change was observed in the carbon monoxide adsorption rate and adsorption amount.

Example 3 40 ml of benzonitrile (Wako Pure Chemical Industries, Ltd. special grade reagent) was used instead of 40 ml of acetonitrile described in Example 1, and instead of heat treatment at 300°C under reduced pressure for 2 hours, heat treatment at 400°C under reduced pressure for 2 hours was used. An adsorbent for carbon monoxide separation was prepared in the same manner as in Example 1 except that the heat treatment was carried out for a period of time.

As a result of measuring the equilibrium adsorption amount of this adsorbent for carbon monoxide and nitrogen at 1 atm, it was found that carbon monoxide
22.2 ml/g, nitrogen 3.51 ml/g.

This adsorbent was then pumped for 20 minutes using a vacuum pump.
The adsorbed carbon monoxide was desorbed by applying reduced pressure (0.1 mmHg) at 25°C.

Thereafter, even if this adsorption and desorption operation was repeated, no change was observed in the carbon monoxide adsorption rate and adsorption amount.

Example 4 Copper chloride () special grade reagent manufactured by Showa Kagaku Co., Ltd. was used as copper chloride (). Activated carbon is made by Tsurumicol Co., Ltd.
4GV and ammonium hydrogen carbonate from Kanto Chemical
A special grade reagent manufactured by Co., Ltd. was used.

Add 10 g of ammonium hydrogen carbonate and 40 ml of purified water to a 300 ml round bottom flask, stir using a magnetic stirrer, and after ammonium hydrogen carbonate has completely dissolved, add 1.5 g (15 mmol) of copper chloride and stir. This was continued and left at 25°C for about 20 minutes. 10 g of activated carbon was added to this round bottom flask and stirred for 24 hours, then the solvent was removed under reduced pressure using a rotary evaporator, and then under reduced pressure (0.5 mmHg).
A heat treatment was performed at 300° C. for 2 hours to obtain a black granular adsorbent for separating carbon monoxide.

The equilibrium adsorption amount of carbon monoxide on this adsorbent at 1 atm was measured and found to be 27.2 ml/g.

This adsorbent was then pumped for 20 minutes using a vacuum pump.
The adsorbed carbon monoxide was desorbed by applying reduced pressure (0.1 mmHg) at 25°C.

Thereafter, even if this adsorption and desorption operation was repeated, no change was observed in the carbon monoxide adsorption rate and adsorption amount.

Example 5 Instead of the 40 ml of ammonium hydrogen carbonate aqueous solution described in Example 4, 40 ml of ammonia water (Showa Kagaku Co., Ltd.) was used.
Except that 40.0 g of special grade reagent (28%) was used, and instead of heat treatment at 300°C under reduced pressure (0.5 mmHg) for 2 hours, heat treatment was performed at 260°C under reduced pressure (0.5 mmHg) for 2 hours. An adsorbent for carbon monoxide separation was prepared in the same manner as in Example 4.

As a result of measuring the equilibrium adsorption amount of this adsorbent for carbon monoxide and nitrogen at 1 atm, it was found that carbon monoxide
The nitrogen content was 17.8 ml/g, and the nitrogen content was 4.20 ml/g.

This adsorbent was then pumped for 20 minutes using a vacuum pump.
The adsorbed carbon monoxide was desorbed by applying reduced pressure (0.1 mmHg) at 25°C.

Thereafter, even if this adsorption and desorption operation was repeated, no change was observed in the carbon monoxide adsorption rate and adsorption amount.

Example 6 Copper chloride () dihydrate special grade reagent manufactured by Showa Kagaku Co., Ltd. was used as copper chloride (), and anhydrous sodium sulfite special grade reagent manufactured by Showa Kagaku Co., Ltd. was used as sodium sulfite. The activated carbon used was 4GV manufactured by Rutumicol Co., Ltd., and the hydrochloric acid used was a special grade reagent manufactured by Wako Pure Chemical Industries, Ltd.

2.56g (15.0mmol) in a 300ml round bottom flask
of copper chloride () was added, 40 ml of water was added, and the mixture was left at 25°C for about 10 minutes while stirring using a magnetic stirrer. Add 10g of activated carbon to this round bottom flask and add 24
After continuing to stir for an hour, water was removed under reduced pressure using a rotary evaporator. Furthermore, add sodium sulfite aqueous solution (anhydrous sodium sulfite) to this.
After adding 2.0g water (40ml) and continuing stirring at 38℃ for 24 hours, add hydrochloric acid acidic sodium sulfite aqueous solution
ml, anhydrous sodium sulfite 1.0 g, and water 1), and then heat-treated at 300° C. for 2 hours under reduced pressure (0.5 mmHg) to obtain a black granular adsorbent for separating carbon monoxide.

As a result of measuring the equilibrium adsorption amount of this adsorbent for carbon monoxide and nitrogen at 1 atm, it was found that carbon monoxide
The nitrogen content was 25.1 ml/g, and the nitrogen content was 3.20 ml/g.

This adsorbent was then pumped for 20 minutes using a vacuum pump.
The adsorbed carbon monoxide was desorbed by applying reduced pressure (0.1 mmHg) at 25°C.

Thereafter, even if this adsorption and desorption operation was repeated, no change was observed in the carbon monoxide adsorption rate and adsorption amount.

Example 7 Carbon monoxide was separated in the same manner as in Example 6 except that 5.12 g (30.0 mmol) of copper chloride () was used instead of 2.56 g (15.0 mmol) of copper chloride () described in Example 6. An adsorbent was prepared for this purpose.

As a result of measuring the equilibrium adsorption amount of this adsorbent for carbon monoxide and nitrogen at 1 atm, it was found that carbon monoxide
32.8 ml/g, nitrogen 3.05 ml/g.

This adsorbent was then pumped for 20 minutes using a vacuum pump.
The adsorbed carbon monoxide was desorbed by applying reduced pressure (0.1 mmHg) at 25°C.

Thereafter, even if this adsorption and desorption operation was repeated, no change was observed in the carbon monoxide adsorption rate and adsorption amount.

Example 8 The same reagents as described in Example 6 were used. 25.6g in a 500ml round bottom flask
(150.0 mmol) of copper chloride () was added, 200 ml of water was added, and the mixture was left at 25°C for about 10 minutes while stirring using a magnetic stirrer. Activated carbon inside this round bottom flask
After adding 100 g and continuing stirring for 24 hours, water was removed under reduced pressure using a rotary evaporator. Furthermore, add a sodium sulfite aqueous solution (anhydrous sodium sulfite 20.0g, water 200g),
After continued stirring at 38°C for 24 hours, the mixture was washed with an aqueous solution of hydrochloric acid and sodium sulfite (5 ml of hydrochloric acid, 2.5 g of anhydrous sodium sulfite, 2.5 g of water), and then heated at 260°C for 2 hours in a nitrogen gas atmosphere to form black particles. An adsorbent for carbon monoxide separation was obtained.

As a result of measuring the equilibrium adsorption amount of this adsorbent for carbon monoxide and nitrogen at 1 atm, it was found that carbon monoxide
The nitrogen content was 21.2 ml/g, and the nitrogen content was 3.62 ml/g.

This adsorbent was then pumped for 20 minutes using a vacuum pump.
The adsorbed carbon monoxide was desorbed by applying reduced pressure (0.1 mmHg) at 25°C.

Thereafter, even if this adsorption and desorption operation was repeated, no change was observed in the carbon monoxide adsorption rate and adsorption amount.

Example 9 Instead of heat treatment at 260°C for 2 hours under nitrogen gas atmosphere as described in Example 8, heat treatment was performed under argon gas atmosphere.
An adsorbent was prepared in the same manner as in Example 8 except that the heat treatment was performed at 260°C for 2 hours.

The equilibrium adsorption amount of carbon monoxide of this adsorbent at 1 atm was measured and found to be 21.1 ml/g.

This adsorbent was then pumped for 20 minutes using a vacuum pump.
The adsorbed carbon monoxide was desorbed by applying reduced pressure (0.1 mmHg) at 25°C.

Thereafter, even if this adsorption and desorption operation was repeated, no change was observed in the carbon monoxide adsorption rate and adsorption amount.

Example 10 Copper chloride () was a special grade copper chloride () dihydrate reagent manufactured by Showa Kagaku Co., Ltd., and activated carbon was manufactured by Tsurumicol Co., Ltd.
4GV was used.

2.56g (15.0mmol) in a 300ml round bottom flask
of copper chloride (), added 40.0 ml of ethanol, and stirred using a magnetic stirrer for about 10 minutes at 25℃.
Leave it for a minute. 10g of activated carbon in this round bottom flask
After stirring was continued for 24 hours, the solvent was removed under reduced pressure using a rotary evaporator. Thereafter, heat treatment was performed at 300° C. under reduced pressure (0.5 mmHg) for 2 hours to obtain a black particulate adsorbent for separating carbon monoxide.

As a result of measuring the equilibrium adsorption amount of this adsorbent for carbon monoxide and nitrogen at 1 atm, it was found that carbon monoxide
The nitrogen content was 24.3 ml/g, and the nitrogen content was 3.29 ml/g.

This adsorbent was then pumped for 20 minutes using a vacuum pump.
The adsorbed carbon monoxide was desorbed by applying reduced pressure (0.1 mmHg) at 25°C.

Thereafter, even if this adsorption and desorption operation was repeated, no change was observed in the carbon monoxide adsorption rate and adsorption amount.

Comparative Example 1 An adsorbent for carbon monoxide separation was prepared in the same manner as in Example 1, except that instead of the heat treatment at 300°C under reduced pressure for 2 hours as described in Example 1, the heat treatment was performed at 120°C under reduced pressure for 2 hours. did.

The equilibrium adsorption amount of carbon monoxide on this adsorbent at 1 atm was measured, and the result was 11.9 ml/g, which was significantly smaller than that of the adsorbent shown in the above example.

Comparative Example 2 Adsorption for carbon monoxide separation was carried out in the same manner as in Example 4, except that instead of the heat treatment at 300°C under reduced pressure for 2 hours as described in Example 4, the heat treatment was performed at 120°C under reduced pressure for 2 hours. A drug was prepared.

The equilibrium adsorption amount of carbon monoxide on this adsorbent at 1 atm was measured, and the result was 12.7 ml/g, which was significantly smaller than that of the adsorbent shown in the above example.

Comparative Example 3 An adsorbent was prepared in the same manner as in Example 6, except that instead of the heat treatment at 300°C for 2 hours as described in Example 6, the heat treatment was performed at 150°C for 2 hours.

As a result of measuring the equilibrium adsorption amount of this adsorbent for carbon monoxide and nitrogen at 1 atm, it was found that carbon monoxide
The amount of carbon monoxide adsorbed was 14.9 ml/g, and the amount of nitrogen adsorbed was 3.30 ml/g, which was considerably smaller than that of the adsorbent of Example 6.

Comparative Example 4 An adsorbent was prepared in the same manner as in Example 8, except that instead of the heat treatment at 260°C under a nitrogen gas atmosphere described in Example 8, the heat treatment was performed at 150°C under a nitrogen gas atmosphere.

As a result of measuring the equilibrium adsorption amount of this adsorbent for carbon monoxide and nitrogen at 1 atm, it was found that carbon monoxide
The amount of carbon monoxide adsorbed was 13.8 ml/g, and the amount of nitrogen adsorbed was 3.58 ml/g, which was considerably smaller than that of the adsorbent of Example 8.

Comparative Example 5 An adsorbent for carbon monoxide separation was prepared in the same manner as in Example 10, except that instead of the heat treatment at 300°C under reduced pressure for 2 hours as described in Example 10, the heat treatment was performed at 120°C under reduced pressure for 2 hours. was prepared.

The equilibrium adsorption amount of carbon monoxide on this adsorbent at 1 atmosphere was measured, and the result was 8.30 ml/g, which was significantly smaller than the adsorption amount of the adsorbent shown in the above example.

(Effects of the Invention) The adsorbent prepared according to the present invention has an overwhelmingly large amount of CO adsorption compared to conventional adsorbents.
Therefore, the carbon monoxide separation and purification equipment or the carbon monoxide removal equipment using this adsorbent can be made quite small-scale, and there is an advantage that the equipment cost can be kept low.

Among the preparation methods according to the present invention, those using organic solvents do not have the risk of corrosion of the preparation equipment, etc., and the latent heat of vaporization of the solvent is small, so it is advantageous in terms of energy during heating and distillation under reduced pressure. , and the solvent can be recovered and reused, making it excellent in terms of resource conservation.

Since the preparation method according to the present invention does not use corrosive solvents such as highly concentrated hydrochloric acid, the possibility of corrosion of the preparation equipment etc. is small.

Claims (1)

[Claims] 1. Monovalent or divalent copper salt dissolved in a solvent is supported on activated carbon, the solvent is removed, and then the temperature exceeds 250°C in a non-oxidizing atmosphere or under reduced pressure. 1. A method for preparing an adsorbent for carbon monoxide separation, which comprises heating to . 2. When supporting a monovalent copper salt on activated carbon, copper halide () is dissolved in an organic solvent alone or in a mixture thereof, then impregnated with activated carbon, excess organic solvent is removed, and copper halide () is dissolved in activated carbon. 2. A method for preparing an adsorbent for separating carbon monoxide according to claim 1, which comprises supporting the carbon monoxide on activated carbon. 3. When supporting a monovalent copper salt on activated carbon, copper halide () is made into an aqueous solution of copper ()-ammonium complex, and then the activated carbon is impregnated with water, and water is removed.
A method for preparing an adsorbent for separating carbon monoxide according to claim 1, which comprises supporting a copper()-ammonium complex on activated carbon. 4. When supporting a monovalent copper salt on activated carbon, copper halide () is dissolved in a solvent, then impregnated with the activated carbon, the solvent is removed and the activated carbon is supported, and then the copper salt is immersed in a solution of sulfites. A method for preparing an adsorbent for carbon monoxide separation according to claim 1, which comprises reducing copper halide () to copper () and then supporting copper halide () on activated carbon by removing the solvent. . 5 Claims consisting of dissolving the copper () salt in a solvent, impregnating the activated carbon, removing the solvent, and supporting the copper () salt on the activated carbon when supporting the divalent copper salt on the activated carbon. 2. A method for preparing an adsorbent for carbon monoxide separation according to item 1.