Sulphur extraction

Details Sulphur extraction Sulphur extraction

C - Chemistry, Metallurgy

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C10G 29/02 (2006.01) B01D 11/04 (2006.01) C01B 17/06 (2006.01) C09K 8/532 (2006.01) C10G 21/08 (2006.01) C10G 29/10 (2006.01)

Patent

CA 1137435

A B S T R A C T Circulating oil used for removal of sulphur in sour gas wells is contacted with an aqueous solution of a lower polysulphide of an alkali metal or ammonia to form a higher polysulphide of the alkali metal or ammonia, and the oil is separated from the higher polysulphide. The higher polysulphide may be converted to a lower polysulphide by precipitating part of the sulphur contained therein, and the lower polysulphide may be recycled for oil de- sulphurization.

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