Selective recovery of carbon dioxide

Patent · Tue Dec 01 04:00:00 EST 1987

OSTI ID:5553772

Nieh, E C.Y.

In a method for the selective separation of carbon dioxide from a stream of acid gas containing carbon dioxide and sulfur containing acid gas components including hydrogen sulfide the improvement is described which comprises the steps of: countercurrently contacting the gas stream in an absorption zone with a treating agent to thereby selectively remove a substantial portion of the carbon dioxide from the gas stream by absorption into the treating agent, discharging a gas stream from the absorption zone containing a significantly reduced amount of carbon dioxide and discharging the treating agent enriched with absorbed carbon dioxide from the absorption zone, the treating agent being an aqueous solution containing from about 35 wt. % to about 55 wt. % of a polyoxypropylene triamine. The polyoxypropylene triamine has a molecular weight of about 320 to about 475 and the aqueous solution having an amine concentration of about 2.5 to about 3.5 meq/g.

• Assignee: Texaco Inc., White Plains, NY
• Patent Number(s): US 4710362
• OSTI ID: 5553772
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ADSORPTION
ALKENES
AMINES
AQUEOUS SOLUTIONS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
DISPERSIONS
GASEOUS WASTES
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
METHYLENE RADICALS
MIXTURES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PH VALUE
PROCESS SOLUTIONS
PROPYLENE
RADICALS
RECOVERY
SEPARATION PROCESSES
SOLUTIONS
SORPTION
SULFIDES
SULFUR COMPOUNDS
SULFUR CONTENT
WASTES