Selective removal of carbonyl sulfide from a hydrogen sulfide containing gas mixture

Patent · Tue Dec 25 04:00:00 EST 1990

OSTI ID:5684909

Souby, M C

This patent describes a process for the selective removal of carbonyl sulfide from a gas mixture also comprising hydrogen sulfide. It comprises contacting the gas mixture with an absorbent comprising from about 35% w to about 55% w of a tertiary amine; from about 5% w to about 15% w of water, and the balance being a physical co-solvent; regenerating the loaded absorbent to remove substantially all of the carbonyl sulfide and most of the hydrogen sulfide to provide a lean absorbent containing hydrogen sulfide in an amount of 0.2% w to 2% w; and recycling the lean absorbent to the contacting step.

• Assignee: Shell Oil Co., Houston, TX (USA)
• Patent Number(s): A; US 4980140
• Application Number: PPN: US 7-322448
• OSTI ID: 5684909
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ADSORBENTS
ADSORPTION
AIR POLLUTION CONTROL
CARBON COMPOUNDS
CARBON OXYSULFIDE
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
DESULFURIZATION
DISPERSIONS
FLUIDS
GASES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
MIXTURES
POLLUTION CONTROL
REMOVAL
SORPTION
SULFIDES
SULFUR COMPOUNDS