Patent ID: 6506357
Filing Date: 2003-01-14
Classification: C01B

Abstract:
A method of recovering sulphur from a first gas stream comprising hydrogen sulphide and at least 50% by volume of ammonia and from a second gas stream comprising hydrogen sulphide but essentially no ammonia, including feeding the first gas stream, the second gas stream, and combustion supporting gas comprising at least one stream of air and at least one stream of essentially pure oxygen or oxygen-enriched air to a single combustion zone or a plurality of combustion zones in parallel with each other without premixing of said first gas stream or said second gas stream with oxygen or air, and thereby creating in the or each combustion zone at least one region in which thermal cracking of ammonia takes place, and taking from the reactor an effluent gas stream including sulphur vapour, sulphur dioxide, and hydrogen sulphide, but essentially no residual ammonia.