Patent ID: 6274109
Filing Date: 2001-08-14
Classification: B01D,C10K

Abstract:
A process for converting carbonyl sulfide and hydrogen cyanide contained in a mixed gas by contacting the mixed gas containing said carbonyl sulfide and hydrogen cyanide with an alkalized chromium oxide-aluminum oxide catalyst in the presence of steam, whereinthe mixed gas and the steam at a volume ratio of 0.05.ltoreq.steam/mixed gas.ltoreq.0.3 are contacted with said alkalized chromium oxide-aluminum oxide catalyst having a grain size in the range of no less than 1 mm and less than 4.5 mm at a gas hourly space velocity no less than 2000 h.sup.-1 at a temperature in the range of 150.degree. C. through 250.degree. C. said grain size representing a diameter when said alkalized chromium oxide-aluminum oxide catalyst has a spherical shape, while representing an equivalent diameter being a length 6 times a ratio between a geometrical volume and a geometrical surface area when said alkalized chromium oxide-aluminum oxide catalyst has a shape other than a spherical shape.