Process for fractionation of a gaseous mixture employing side st

Details Process for fractionation of a gaseous mixture employing side st Process for fractionation of a gaseous mixture employing side st

1984-05-16

1986-07-08

Bashore, S. Leon

Refrigeration

Processes

Circulating external gas

62 20, 62 33, 55 16, 203 98, 203DIG19, F25J 302

Patent

active

045990964

ABSTRACT:
In fractionating a gaseous mixture, e.g. an acid gas and hydrocarbon, in a column wherein, during distillation, components of the gaseous mixture tend to form a substantially azeotropic mixture, or at least one of the components of the gaseous mixture tends to freeze out, withdrawing a side stream fluid from the column during fractionation, and separating said side stream fluid, e.g. by membranes or scrubbing, so as to remove preferentially at least a portion of one of the components of the substantially azeotropic mixture, or of at least one of the components tending to freeze out, and recycling resultant depleted side stream to said fractionating column.

REFERENCES:
patent: 2690989 (1951-10-01), Bottenberg
patent: 3445347 (1969-05-01), Borrel et al.
patent: 3702541 (1972-11-01), Randall et al.
patent: 4130403 (1978-12-01), Cooley et al.
patent: 4350511 (1982-09-01), Holmes et al.
patent: 4383842 (1983-05-01), O'Brien
Technical Publication: Khimicheskaya Promyshlennost [Chemical Industry], No. 2, 1979, pp. 37-41, (and English translation).

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