Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Effecting a change in a polymerization process in response...
Patent
1982-05-26
1984-04-10
Smith, Edward J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Effecting a change in a polymerization process in response...
526 67, 526 68, 526901, 526905, C08F 234, C08F 1006
Patent
active
044422717
ABSTRACT:
The disclosure is directed to an improvement in the gas phase polymerization of propylene using a Ziegler-Natta catalyst in the presence of hydrogen wherein the gaseous propylene is withdrawn from the reactor, cooled and condensed and returned as a liquid to the reactor in order to regulate the polymerization temperature. The amount of the gaseous phase in the condenser-cooler-accumulator system is kept constant by regulating the amount of gaseous phase returned to the reactor.
REFERENCES:
patent: 4012573 (1977-03-01), Trieschmann et al.
Hennenberger Peter
Klamann Helmut
Rau Wolfgang
BASF - Aktiengesellschaft
Smith Edward J.
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