Method and apparatus for olefin recovery

Details Method and apparatus for olefin recovery Method and apparatus for olefin recovery

1988-10-19

1989-12-05

Bascomb, Wilbur

Distillation: processes, separatory

Plural distillations performed on same material

One a distillation under positive pressure or vacuum

203 87, 203 88, 62 24, 62 42, 62 43, 62 44, 202153, 208354, 208361, 208364, 585809, 585810, C07C 704, F25J 302

Patent

active

048850632

ABSTRACT:
A process and apparatus are disclosed for recovering olefins, particularly C.sub.3, C.sub.4, and C.sub.5 olefins, from gaseous mixture thereof with lower-boiling components. The olefin-containing gas mixtures is compressed and cooled to yield vapor and condensate streams, the vapor stream is further cooled forming additional condensate, both condensate streams are combined and adiabatically flash evaporated, and the remaining liquid is distilled to recover the desired olefins in a liquid bottoms products. Flash vapor, and optionally the distillation vapor product, are recycled to the compression step.

REFERENCES:
patent: 1393248 (1921-10-01), Saunders
patent: 2014724 (1935-09-01), Eastman
patent: 2514294 (1950-07-01), Rupp
patent: 2617272 (1952-11-01), Aicher
patent: 3054745 (1962-09-01), Forbes et al.
patent: 3429805 (1969-02-01), Karbosky
patent: 3542673 (1970-11-01), Ringler
patent: 4272270 (1981-06-01), Higgins

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