Process for separating aggressive gases from gas mixtures

Patent · Tue Mar 06 04:00:00 EST 1984

OSTI ID:6564600

Graham, T E

A process for separating large percentages of aggressive gases such as carbon dioxide from low temperature gas mixtures wherein the gas mixture is passed through a plurality of treatment zones in series. In each treatment zone the gas mixture is first compressed to a pressure such that the partial pressure of the carbon dioxide is not greater than the critical carbon dioxide partial pressure and the compressed gas mixture is then brought into contact with a membrane more permeable to carbon dioxide than other gases of the mixture such that carbon dioxide permeates the membrane to the other side thereof. The gas mixture is maintained in contact with the membrane a sufficient time to lower the partial pressure of the carbon dioxide in the non-permeated gas mixture to less than about 40 percent of said critical carbon dioxide partial pressure. The process is especially useful for separating carbon dioxide from methane and other gases.

• Assignee: Monsanto Company
• Patent Number(s): US 4435191
• OSTI ID: 6564600
• Country of Publication: United States
• Language: English

Related Subjects

090121 -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
ALKANES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
COMPRESSED GASES
COMPRESSION
DISPERSIONS
FLUIDS
GASES
HYDROCARBONS
MEMBRANE TRANSPORT
MEMBRANES
METHANE
MIXTURES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PARTIAL PRESSURE
PERMEABILITY
POLYMERS
SEPARATION PROCESSES
TEMPERATURE DEPENDENCE