Membrane-aided distillation for carbon dioxide and hydrocarbon s

Details Membrane-aided distillation for carbon dioxide and hydrocarbon s Membrane-aided distillation for carbon dioxide and hydrocarbon s

1985-06-05

1986-07-29

Sever, Frank

Refrigeration

Processes

Circulating external gas

55158, 62 28, 62 30, 62 31, 62 34, 210640, F25J 502, B01D 1300

Patent

active

046024778

ABSTRACT:
A process is described for separating a carbonaceous off-gas in a low temperature distillative separation to produce a fuel gas stream, a carbon dioxide-sulfur stream and a heavy hydrocarbon stream wherein the carbon dioxide-sulfur stream is reduced in pressure to produce refrigeration to return a portion of the fuel gas stream as reflux to the distillation, and the fuel gas stream, now at relatively higher pressure than the carbon dioxide-sulfur stream, is passed over a semi-permeable membrane selective to carbon dioxide to separate carbon dioxide from the fuel gas to combine the permeate carbon dioxide with the carbon dioxide-sulfur stream.

REFERENCES:
patent: 4417449 (1983-11-01), Hegarty et al.
patent: 4444571 (1984-04-01), Matson
"Membrane Separation Processes for Acid Gases", S. S. Kulkarni, E. W. Funk, N. N. Li, Aiche Summer National Meeting, Denver, 28-31, Aug. 1983.
Separation Techniques: "Membranes for Natural Gas Sweetening and CO.sub.2 Enrichment", Reprinted from Chemical Engineering Progress, Oct. 1982.
"W. R. Grace & Co., Working to Make the `Big 3` in Membranes Become the `Big 4`". from Membrane & Separation Technology News vol. 2, No. 10, Jun. 1984.
A Monthly Newsletter on Microporous RO UF ED Electrolytic & Gas Separation Technologies.
"Spiral Wound Membranes CO.sub.2 Removal Process for the Wellhead" by Thomas E. Cooley to AIChE 1984 Spring National Meeting, May 21, 1984, Anaheim, California.
"Membrane Separation of CO.sub.2 and H.sub.2 S from Natural Gas--Field Experience", Nicholas R. Grey, William H. Mazur, Envirogenics Systems Co., El Monte, CA, to American Institute of Chemical Engineers, 1984, Spring National Meeting, Anaheim, CA, May 20-23, 1984.
"Applications of Prism Separators in Natural Gas Service" by D. J. Stookey, T. E. Graham, A. P. Aneja, to American Institute of Chemical Engineers, 1984, Spring National Meeting, Anaheim, CA May 20-23.

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