Process for purifying polypropylene

Details Process for purifying polypropylene Process for purifying polypropylene

1975-10-29

1977-09-27

Hamrock, William F.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528495, C08F 608

Patent

active

040513130

ABSTRACT:
Polypropylene obtained by polymerizing propylene in contact with stereospecific catalysts supported on anhydrous magnesium dihalides is purified, and the magnesium content thereof is reduced, by treating a suspension of the polypropylene in a hydrocarbon solvent with an aliphatic alcohol containing from 3 to 8 carbon atoms, followed by centrifuging to remove both the hydrocarbon solvent and the catalyst residues solubilized by the alcohol treatment.

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