Patent ID: 8974759
Filing Date: 2015-03-10
Classification: B01D,C01B,C12M

Abstract:
1. A process for selectively reducing the concentration of hydrogen cyanide with respect to carbon monoxide in a gas feed, said gas feed containing at least about 5 volume percent carbon monoxide and between about 1 and 500 parts per million by volume hydrogen cyanide, comprising: a. continuously passing said gas feed into contact with an aqueous solution of between about 50 and 2000 parts per million by mass of permanganate anion under conditions sufficient for permanganate anion to oxidize hydrogen cyanide and generate manganese dioxide, 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.