Patent ID: 9187379
Filing Date: 2015-11-17
Classification: B01D,C01B,C01C,C01F,C05B,C05C,C05D

Abstract:
1. A method of producing a sulphate or a phosphate-based fertilizer from a feedstock stream comprising hydrogen sulphide in a proportion greater than about 25% by volume and carbon dioxide in an amount no more than about 50% by volume, said method comprising: a. combusting the feedstock stream in a furnace to produce a stream comprising sulphur dioxide and carbon dioxide; b. feeding the sulphur dioxide stream to a reactor to produce a stream comprising sulphuric acid and a gaseous waste stream comprising carbon dioxide; and c. reacting the sulphuric acid with a potassium source or a phosphate source to convert the sulphuric acid to a phosphate-based or sulphate-based fertilizer.