Polymerisation process
AssigneeIneos Europe AG
InventorsDaniel Marissal, Philip Van Breuseghem, Brent R. Walworth
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Abstract
Polymerization of olefins in a reactor system having two reactors in series, more particularly a process for the polymerization of monomer in at least first and second reactors operated in series. The process includes contacting a first stream containing vapor derived from the effluent withdrawn from the second reactor with a feed stream to the second reactor, the feed stream containing effluent derived from the first reactor.
Claims16
A process for the polymerisation of monomer in at least first and second reactors operated in series, which process comprises either:
- (i) contacting a first stream comprising vapour derived from the effluent withdrawn from the second reactor with a feed stream to the second reactor, said feed stream comprising effluent derived from the first reactor and said first stream having been separated from the polymer withdrawn from the second reactor at a pressure of 0.5 MPa (5 bar) or above, or
- (ii) contacting a first stream comprising vapour derived from the effluent withdrawn from a subsequent reactor with a feed stream to the second reactor, said feed stream comprising effluent derived from the first reactor.
A process for treatment of a first stream comprising vapour derived from the effluent withdrawn from a polymerisation reactor, which process comprises:
- i) contacting said first stream with a feed stream to the reactor to produce a vapour comprising hydrogen,
- ii) treating said vapour comprising hydrogen to produce and separate from each other a first liquid stream and a third stream comprising vapour,
- iii) passing said third stream to a first separations step operating at greater than 0.5 MPa and at less than −10° C. to separate hydrogen therefrom, each of steps (i), (ii) and (iii) being performed at a pressure of at least 0.5 MPa, and
- iv) passing a portion of the first liquid stream to a second separations step operating at less than 0.4 MPa and at less than −10° C. to separate hydrogen therefrom.
Dependencies are inferred from the claim text.