Process for selective production of propylene from...

Details Process for selective production of propylene from... Process for selective production of propylene from...

2005-07-12

2005-07-12

Doroshenk, Alexa (Department: 1764)

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Organic polymerization

C422S131000, C422S134000, C422S187000, C422S186220, C585S518000, C585S520000

Reexamination Certificate

active

06916448

ABSTRACT:
For the selective production of propylene from an olefinic C4fraction, a process is implemented that successively comprises:1) the selective hydrogenation of butadiene with isomerization of butene-1 into butene-2;2) the separation by distillation of a mixture that is rich in isobutene and butene-1 at the top and a fraction that is rich in butene-2 at the bottom;3) the skeletal isomerization of isobutene into n-butenes on the top fraction, with recycling in stage 1; and4) the metathesis of the butene-2-rich fraction with ethylene.The advantage of this process is to produce in a very selective way polymerization-quality propylene from all of the olefinic compounds of a C4fraction, including isobutene.

REFERENCES:
patent: 5962750 (1999-10-01), Cameron et al.
patent: 6075173 (2000-06-01), Chodorge et al.
patent: 6207115 (2001-03-01), Chodorge et al.

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