METHOD OF REMOVING HCN FROM MIXTURES OF GASES AND A CATALYST FOR DECOMPOSING HCN

摘要

PCT No. PCT/EP94/01646 Sec. 371 Date May 13, 1996 Sec. 102(e) Date May 13, 1996 PCT Filed May 20, 1994 PCT Pub. No. WO94/29004 PCT Pub. Date Dec. 22, 1994The invention relates to a process for the removal of HCN from gas mixtures that contain at least HCN and sulfur compounds, especially from gas mixtures that are obtained by partial oxidation of hydrocarbons, by catalytic decomposition of HCN, as well as a catalyst for the decomposition of HCN. According to the invention, the gas mixture is brought into contact with a catalyst which decomposes the HCN by hydrogenation and/or by hydrolysis and COS that is contained in the gas mixture is decomposed at least partially in this catalyst by hydrolysis. Advantageously, a catalyst that is based on titanium oxide and/or zirconium oxide as a vehicle and that contains chromium oxide as an active component is used. Advantageously, the catalyst is reduced during catalyst production or before use with H2 and/or a reducing gas at temperatures above the operating temperature of catalytic decomposition.