Processing C4 olefin streams for the maximum production of...

Details Processing C4 olefin streams for the maximum production of... Processing C4 olefin streams for the maximum production of...

2007-05-08

2007-05-08

Dang, Thuan Dinh (Department: 1764)

Chemistry of hydrocarbon compounds

Plural serial diverse syntheses

To produce unsaturate

C585S644000, C585S646000

Reexamination Certificate

active

10620186

ABSTRACT:
In order to maximize the production of propylene when the external supply of ethylene is limited, the C4cut from a hydrocarbon cracking process is first subjected to autometathesis prior to any isobutylene removal and without any ethylene addition. This favors the reactions which produce propylene and pentenes. The ethylene and propylene produced are then removed leaving a stream of the C4's and heavier components. The C5and heavier components are then removed leaving a mixture of 1-butene, 2-butene, isobutylene, and iso- and normal butanes. The isobutylene is next removed preferably by a catalytic distillation hydroisomerization de-isobutyleneizer. The isobutylene-free C4stream is then mixed with the product ethylene removed from the autometathesis product together with any fresh external ethylene needed and subjected to conventional metathesis producing additional propylene.

REFERENCES:
patent: 5087780 (1992-02-01), Arganbright
patent: 5898091 (1999-04-01), Chodorge et al.
patent: 6075173 (2000-06-01), Chodorge et al.
patent: 6271430 (2001-08-01), Schwab et al.
patent: 6358482 (2002-03-01), Chodorge et al.
patent: 6580009 (2003-06-01), Schwab et al.
patent: 6777582 (2004-08-01), Gartside et al.
PCT International Search Report and Written Opinion for PCT/US2004/022118.

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