Process for removal of carbonyl sulfide in liquified hydrocarbon

Details Process for removal of carbonyl sulfide in liquified hydrocarbon Process for removal of carbonyl sulfide in liquified hydrocarbon

1979-04-27

1980-11-11

Gantz, Delbert E.

Mineral oils: processes and products

Refining

Sulfur removal

55 37, 55 73, 423226, 423228, 423243, C07C 711, C01B 3126, C01B 1716, C07C 910

Patent

active

042331412

ABSTRACT:
Liquified hydrocarbon gases containing at least carbonyl sulfide as an impurity are purified by intimately mixing the liquified hydrocarbon gas with an aqueous absorbent for hydrogen sulfide in a hydrolysis zone maintained at a temperature and a pressure sufficient to maintain the liquified hydrocarbon gas in the liquid state and hydrolyze the carbonyl sulfide to hydrogen sulfide and carbon dioxide. The liquified hydrocarbon gas containing at least a portion of the formed carbonyl sulfide and carbon dioxide is separated from the liquid absorbent and passed to an absorption zone where it is contacted with a liquid hydrogen sulfide absorbent where at least the formed hydrogen sulfide is separated from the liquified petroleum gas. A stage of absorption of at least hydrogen sulfide may proceed mixing of the liquified hydrocarbon gas with the absorbent in the hydrolysis reaction zone. The absorbent employed does not combine irreversibly with carbonyl sulfide, hydrogen sulfide, and carbon dioxide, and preferably is an aqueous solution of diethanolamine.

REFERENCES:
patent: 2383416 (1945-08-01), Reed
patent: 2594311 (1952-04-01), Johnson et al.
patent: 2726992 (1955-12-01), Easthagen et al.
patent: 3098705 (1963-07-01), Bally
patent: 3100680 (1963-08-01), Shaw et al.
patent: 3961015 (1976-06-01), Dailey
patent: 3966875 (1976-06-01), Bratzler et al.
patent: 4011066 (1977-03-01), Bratzler et al.

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