Patent ID: 9676624
Date: 2017-06-13
CPC Classifications: B01D,C01B,C12M

Claim:
1. A process for selectively reducing the concentration of hydrogen cyanide with respect to carbon monoxide in a gas feed, said gas feed containing carbon monoxide and hydrogen cyanide, comprising: a. continuously passing said gas feed into contact with an aqueous solution of permanganate anion under conditions sufficient for the permanganate anion to oxidize the hydrogen cyanide and generate manganese dioxide, the duration of said contacting being at least sufficient to provide a treated gas having a concentration of the hydrogen cyanide that is less than that in the gas feed; b. continuously removing said treated gas from contact with the aqueous solution; c. intermittently or continuously replenishing permanganate anion to said aqueous solution; and d. intermittently or continuously removing manganese dioxide from said aqueous solution.