Sulfur extraction method

Details Sulfur extraction method Sulfur extraction method

1978-12-01

1980-10-28

Novosad, Stephen J.

Wells

Processes

Cleaning or unloading well

208230, 208235, 208236, C10G 1900, C10G 2908, E21B 2100

Patent

active

042301840

ABSTRACT:
Circulating oil used for removal of sulfur in sour gas wells is contacted with an aqueous solution of a lower polysulfide of an alkali metal or ammonia to form a higher polysulfide of the alkali metal or ammonia, and the oil is separated from the higher polysulfide. The higher polysulfide is converted to lower polysulfide by precipitating part of the sulfur contained therein, and the lower polysulfide is recycled for oil desulfurization.

REFERENCES:
patent: 2020661 (1935-11-01), Schulze et al.
patent: 3393733 (1968-07-01), Chiang-Hai Kuo et al.
patent: 3474028 (1969-10-01), Bulian et al.
patent: 3501397 (1970-03-01), Thompson et al.
patent: 3881550 (1975-05-01), Barry
patent: 4018572 (1977-04-01), Swanson

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