Gas purification process

Details Gas purification process Gas purification process

B - Operations, Transporting

01

D

23/344, 23/352

B01D 53/34 (2006.01)

Patent

CA 1108822

ABSTRACT OF THE DISCLOSURE A process for purifying gases containing hydrogen sulfide and/or hydrogen cyanide is provided wherein said gases are contacted with an absorbing solution containing naphthols or their salts as a catalyst having a nitroso group at .alpha.- position or .beta.- position, acidic group(s) and a standard redox potential in the range of 0.4 V to 0.7 V. Hydrogen sulfide and/or hydrogen cyanide are removed by converting the former mainly into thiosulfuric acid and the latter mainly into thiocyanic acid. According to this process, no trouble is caused by sulfur deposit as in conventional methods. The scale of the purification appa- ratus is smaller, and the amount of catalyst required for purification is reduced. Further by pretreating the absor- bing solution, this process becomes even more advantageous. -1-

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