Process for removal of carbonyl sulfide in liquified hydrocarbon gases with absorption of acid gases

Patent · Tue Nov 11 00:00:00 EST 1980

OSTI ID:6521708

Beavon, D K; Mackles, M

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.

• Assignee: Parsons, Ralph M Co
• Patent Number(s): US 4233141
• OSTI ID: 6521708
• Resource Relation: Patent File Date: Filed date 27 Apr 1979
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
CARBON SULFIDES
REMOVAL
LIQUEFIED NATURAL GAS
PURIFICATION
CARBON DIOXIDE
HYDROGEN SULFIDES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HYDROGEN COMPOUNDS
NATURAL GAS
OXIDES
OXYGEN COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
030300* - Natural Gas- Drilling
Production
& Processing