Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymerizing in tubular or loop reactor
Patent
1987-04-08
1988-12-27
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymerizing in tubular or loop reactor
526 79, 526 88, 526 89, 526144, 5263486, 526352, 5263522, 526909, 526922, C08F 214, C08F 1002, C08F 1008
Patent
active
047941510
ABSTRACT:
A process for the continuous preparation of finely divided homopolymers and copolymers of ethene by catalytic polymerization in a circular tube reactor using a liquid alkane as reaction medium in which the ethene or ethene/comonomer mixture to be polymerized is present in dissolved form and the polymer formed is present in suspended form and running the reaction mixture as a cycle stream to which the feed materials are added by bleeding in and from which the polymer formed is withdrawn by bleeding out reaction mixture, comprising (a) maintaining the mean concentration C.sub.m of polymer in the cycle stream at a value within a certain range and (b) effecting the bleeding out of reaction mixture at a point of the cycle stream at which the concentration of polymer has a value which is lower than the mean concentration C.sub.m by a distinct and definite amount.
REFERENCES:
patent: 3242150 (1966-03-01), Scoggin
patent: 3248179 (1966-04-01), Norwood
patent: 3293000 (1966-12-01), Marwil
patent: 4007321 (1977-02-01), Scholz et al.
patent: 4395523 (1983-07-01), Kirch
Bachl Robert
Funk Guido
Hennenberger Peter
Kolk Erich
Mueller-Mall Rudolf
BASF - Aktiengesellschaft
Schofer Joseph L.
Teskin F. M.
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