Patent ID: 8574539
Filing Date: 2013-11-05
Classification: C01B,C10K

Abstract:
1. A process for the selective oxidation of hydrogen sulphide in a hydrogen sulphide-containing feed gas, comprising a hydrocarbon or hydrogen or a combination thereof, to elemental sulphur in a reaction zone containing a Claus catalyst, comprising the steps of: i) reacting in the reaction zone the hydrogen sulphide in the hydrogen sulphide-containing feed gas with sulphur dioxide at a pressure in the range of from 4 to 200 bar (absolute) and a temperature in the range of from 120 to 160° C., such that the elemental sulphur formed is essentially in liquid form; and the Claus catalyst undergoes sulphation to form an anionic oxide of sulphur on the Claus catalyst to thereby provide a sulphated Claus catalyst, and ii) contacting the sulphated Claus catalyst with a reducing atmosphere under conditions so as to effectuate the reduction of the anionic oxide of sulphur.