Conversion of acid gas to sulphate or phosphate-based fertilizers
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United States of America Patent
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Nov 17, 2015
Grant Date -
Feb 6, 2014
app pub date -
Apr 20, 2012
filing date -
Apr 20, 2011
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Abstract
A method is disclosed for producing sulphate or phosphate-based fertilizer from hydrogen sulphide. The method involves feeding a stream containing a substantial volume of hydrogen sulphide and air to a furnace, where it is burned to produce a sulphur dioxide rich gas stream. The sulphur dioxide rich gas stream is then fed to a reactor to produce a sulphuric acid stream and a waste stream comprising carbon dioxide, nitrogen, oxygen, trace impurities and trace amounts of unreacted sulphur dioxide. The sulphuric acid stream is finally converted to a sulphate or phosphate-based fertilizer.
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