Hydrocarbon recovery from carbon dioxide-rich gases

Patent · Mon Mar 30 23:00:00 EST 1987

OSTI ID:6605944

Gottier, G N

A process is described for the lean oil absorptive separation of a carbon dioxide-rich feed stream into a carbon dioxide-enriched product and a C/sub 3+/ hydrocarbon-enriched product comprising the steps of: (a) contacting a carbon dioxide-rich feed stream containing lower molecular weight hydrocarbons with a carbon dioxide-loaded lean oil solvent in an absorption zone; (b) recovering a carbon dioxide-enriched stream at the overhead of the absorption zone and condensing a part of the stream as condensate as reflux to the absorption zone while recovering a carbon dioxide-enriched product from the condensation step; (c) cooling the carbon dioxide-loaded lean oil solvent by heat exchange with a lower temperature fluid; (d) removing a C/sub 3+/ hydrocarbon-rich bottom stream from the absorption zone and contacting it in a stripping zone with additional lean oil solvent; and (e) removing a substantially carbon dioxide-containing stream from the overhead of the stripping zone, while recovering a substantially C/sub 3+/ hydrocrbon-containing stream at the bottom of the stripping zone.

• Assignee: Air Products and Chemicals, Inc., Allentown, PA
• Patent Number(s): US 4654062
• OSTI ID: 6605944
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ADSORPTION
AIR POLLUTION CONTROL
BOILING
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CONDENSATES
CONTROL
COOLING
ENERGY SOURCES
ENERGY TRANSFER
EXTRACTION
FOSSIL FUELS
FUELS
HEAT TRANSFER
HYDROCARBONS
MOLECULAR WEIGHT
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
PHASE TRANSFORMATIONS
POLLUTION CONTROL
RECYCLING
SEPARATION PROCESSES
SOLVENT EXTRACTION
SOLVENTS
SORPTION
TEMPERATURE EFFECTS
VAPOR CONDENSATION