Polyolefin reactor system

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymerizing in tubular or loop reactor

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Details

422132, 526 68, 528498, C08F 1006

Patent

active

041210298

ABSTRACT:
A method and apparatus are provided in a pipeloop reactor system for recovery of soluble catalyst components from polymer slurry effluent into the pipe-loop reactor. The polymer slurry is collected in a wash column attached to the upper run of the loop reactor; the slurry is allowed to settle through a countercurrent flow of wash liquid, the liquid used for wash, being one in which catalyst components are soluble; the washed slurry is collected in a settling leg attached to the wash column; and wash liquid containing catalyst components is overflowed into the reactor loop. In peferred embodiments of the invention the wash liquid is subjected to auto-refrigeration before being admitted into the wash column. In another preferred embodiment unreacted monomer feed is recovered from the polymer slurry, purified, and recycled as wash liquid. In still another embodiment of the invention the flow of polymer from the reactor loop into the wash column is mechanically restricted.

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patent: 3324093 (1967-06-01), Alleman
patent: 3374211 (1968-03-01), Marwil et al.
patent: 3405109 (1968-10-01), Rohlfing

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