Method for producing polymers

Details Method for producing polymers Method for producing polymers

1992-09-02

1994-06-21

Teskin, Fred

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Treating polymer containing material or treating a solid...

528483, 528490, 528498, 528501, 526 77, 585826, 585829, 585836, 585851, 585852, 585864, 585867, 585868, C08F 600

Patent

active

053229274

ABSTRACT:
Polyolefins are produced by a process which includes the steps of: polymerizing an olefin in a reaction zone; removing unreacted olefin from the polymer in a flash chamber and recycling the unreacted olefin to the reaction zone; stripping unreacted olefin from the polymer by passing a stripping gas through the polymer in a stripping zone; passing the unreacted olefin from the stripping zone at superatmospheric pressure through an adsorbent which selectively adsorbs olefins; depressurizing the adsorbent to produce a substantially pure olefin and recycling the substantially pure olefin to the reaction zone; purging the adsorbent bed with a nonadsorbable gas to remove residual unreacted olefin from the adsorbent; and passing the purge gas-unreacted olefin to the stripping zone to be used as stripping gas.

REFERENCES:
patent: 2977346 (1961-03-01), Cull
patent: 3280091 (1966-10-01), Dance
patent: 3600463 (1971-08-01), Hagemeyer, Jr. et al.
patent: 4067854 (1978-01-01), Fiorentino
patent: 4133842 (1979-01-01), Anderson
patent: 5177293 (1993-01-01), Mitariten et al.

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