Patent ID: 9115000
Filing Date: 2015-08-25
Classification: B01J,C01B

Abstract:
1. A process for producing carbonyl sulfide, the process comprising continuously adding carbon monoxide into a reactor which contains sulfur dissolved or suspended in an organic solvent in the presence of a base catalyst; reacting the sulfur with the carbon monoxide at a pressure of 0.2-3.0 MPa and a temperature of 40-120° C. to form carbonyl sulfide; recovering a gas phase from the reactor; cooling the recovered gas phase using a condenser to condense the carbonyl sulfide in the gas phase; continuously recovering the condensed carbonyl sulfide; and returning the uncondensed gas to the reactor to continuously produce carbonyl sulfide, wherein the base catalyst is a basic organic compound selected from the group consisting of amidine bases, guanidine bases, and phosphazene bases, wherein the amidine bases are selected from the group consisting of 1,8-diazabicyclo[5.4.0]undec-7-ene and 1,5-diazabicyclo[4.3.0]non-5-ene, the guanidine bases are selected from the group consisting of 1,5,7-triazabicyclo[4.4.0]dec-5-ene and 7-methyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene, and the phosphazene bases are selected from the group consisting of alkylimino-tris(dimethylamino)phosphorane in which the alkyl is a C