Refrigeration – Cryogenic treatment of gas or gas mixture – Separation of gas mixture
Patent
1996-05-08
1997-06-03
Capossela, Ronald C.
Refrigeration
Cryogenic treatment of gas or gas mixture
Separation of gas mixture
62627, 62935, F25J 100
Patent
active
056343540
ABSTRACT:
Olefins are recovered from thermally cracked gas or fluid catalytic cracking off gas by cooling the gas to condense a portion of the hydrocarbons, removing hydrogen from the noncondensed gas, and condensing the remaining hydrocarbons in a cold condensing zone using a dephlegmator which operates above about -166.degree. F. This mode of operation minimizes the amount of methane in the condensate which is further processed in demethanizer column(s) and permits the condensation of ethylene at warmer temperatures than possible using a partial condenser in the cold condensing zone. The use of a dephlegmator at temperatures above about -166.degree. F. minimizes or eliminates the formation and accumulation of unstable nitrogen compounds in the ethylene recovery system. Hydrogen is removed from the noncondensed gas in a process selected from polymeric membrane permeation, adsorptive membrane permeation, or pressure swing adsorption.
REFERENCES:
patent: 4002042 (1977-01-01), Pryor et al.
patent: 4654047 (1987-03-01), Hopkins et al.
patent: 4654063 (1987-03-01), Auvil et al.
patent: 4732583 (1988-03-01), DeLong et al.
patent: 4900347 (1990-02-01), McCue, Jr. et al.
patent: 5035732 (1991-07-01), McCue, Jr.
patent: 5053067 (1991-10-01), Chretien
patent: 5082481 (1992-01-01), Barchas et al.
patent: 5332424 (1994-07-01), Rao et al.
patent: 5354547 (1994-10-01), Rao et al.
patent: 5421167 (1995-06-01), Verma
patent: 5452581 (1995-09-01), Dinh et al.
Shelly, S. "Reengineering Ethylene's Cold Train", Chemical Engineering/Jan. 1994, pp. 37-41.
Verma et al., "Revamping Olefins Plant with Membrane Technology, Paper presented at the American Institute of Chemical Engineering spring National Meeting", Apr. 20, 1994, Atlanta, Georgia.
Howard Lee J.
Rowles Howard C.
Air Products and Chemicals Inc.
Capossela Ronald C.
Fernbacher John M.
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