Process for recovering C.sub.4 + hydrocarbons using a dephlegmat

Details Process for recovering C.sub.4 + hydrocarbons using a dephlegmat Process for recovering C.sub.4 + hydrocarbons using a dephlegmat

1983-04-25

1985-05-28

Sever, Frank

Refrigeration

Processes

Circulating external gas

62 31, 62 34, 62 39, F25J 302

Patent

active

045198250

ABSTRACT:
A process is described for separating C.sub.4 + hydrocarbons in high recovery and high purity from a feed gas comprising about 0-5% C.sub.5 and heavier hydrocarbons, 1-10% C.sub.4 hydrocarbons, 0-10% C.sub.3 hydrocarbons, 0-10% C.sub.2 hydrocarbons and the balance CH.sub.4 and light inerts. Efficient separation is effected by using a dephlegmator cycle employing only internal refrigeration.

REFERENCES:
patent: 3274102 (1966-09-01), Brazell et al.
patent: 4002042 (1977-01-01), Pryor et al.
patent: 4140504 (1979-02-01), Campbell et al.
patent: 4270940 (1981-06-01), Rowles et al.

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