| 摘要 |
An ingredient for producing copper (I) chloride obtained by mixing copper (II) chloride and copper (II) carboxylate. A production process of copper (I) chloride comprising the steps of mixing copper (II) chloride and copper (II) carboxylate and heat-treating the resultant mixture under a reduced pressure, under the atmosphere of an inert gas, or under the atmosphere of a reductive gas. An absorbent for at least one reductive gas selected from carbon monoxide gas, ethylene gas or acetylene gas, which is obtained by supporting copper (II) chloride and copper (II) carboxylate on a carrier and by heat-treating the resultant carrier under a reduced pressure, under the atmosphere of an inert gas, or under the atmosphere of a reductive gas. A recovering method of carbon monoxide gas, wherein a gas containing carbon monoxide is brought into contact with an absorbent which is obtained by supporting copper (II) chloride and copper (II) carboxylate on a carrier and by heat-treating the resultant carrier under a reduced pressure, under the atmosphere of an inert gas, or under the atmosphere of a reductive gas, thereafter recovering carbon monoxide gas by desorbing it from the absorbent by heat-treatment and/or pressure reduction. The ingredient for producing copper (I) chloride of the present invention can be prepared without using any special manufacturing facilities or instruments under the atmosphere of the air, and at the same time, it can be stored under the atmosphere of the air without changing in quality for a long term. Moreover, the adsorbent of reductive gas in accordance with the present invention can adsorb carbon monoxide gas again soon after desorbing carbon monoxide gas without particularly treating it.
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