Purification of propylene polymerization product

Details Purification of propylene polymerization product Purification of propylene polymerization product

1978-04-21

1979-09-11

Levin, Stanford M.

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

Synthetic resins

Treating polymer containing material or treating a solid...

526351, 528493, 528494, 528496, C08F 602, C08F 628

Patent

active

041676190

ABSTRACT:
This invention is directed to an improved method for the work-up of the reaction product from stereospecific polymerization of propylene with Ziegler Type catalysts in a liquid phase polymerization process employing a C.sub.3 reaction medium. The product work-up comprises treatment of the reactor effluent slurry with a small amount of a C.sub.3 or C.sub.4 alkanol and with oxygen or an effective peroxide, followed by washing of the polymer with a C.sub.3 hydrocarbon medium containing a small amount of a C.sub.3 or C.sub.4 alkanol.

REFERENCES:
patent: 2974132 (1961-03-01), Jacobi
patent: 3112299 (1963-11-01), Borrows et al.
patent: 3130186 (1964-04-01), Siggel et al.
patent: 3287343 (1966-11-01), Kutner
patent: 3496156 (1970-02-01), Luciani et al.
patent: 3775389 (1973-11-01), Hundmeyer et al.

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