Process for separating CO.sub.2 from a gaseous mixture

Details Process for separating CO.sub.2 from a gaseous mixture Process for separating CO.sub.2 from a gaseous mixture

1986-03-20

1987-12-01

Makay, Albert J.

Refrigeration

Processes

Circulating external gas

62 41, 62 42, F25J 302

Patent

active

047102136

ABSTRACT:
A process for the separation of CO.sub.2 from gases containing light hydrocarbons and a relatively high proportion of CO.sub.2 comprises a two stage fractionation procedure. In a first fractionating stage, the entire amount of C.sub.1 and C.sub.2 hydrocarbons are separated from the gaseous mixture; the resultant bottoms fraction, which contains the C.sub.3+ hydrocarbons and CO.sub.2, is pumped to a higher pressure and further distilled in a second fractionating stage. During this process, the head cooling of the second fractionating stage is coupled with the bottoms heating of the first fractionating stage.

REFERENCES:
patent: 3983711 (1976-10-01), Solomon
patent: 4149864 (1979-04-01), Eakman et al.
patent: 4312652 (1982-01-01), Mikulla
patent: 4351655 (1982-09-01), Styring, Jr.
"Process Improves Acid Gas Separation", Hydrocarbon Processing, May 1982, pp. 131-136.

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