Process for multi-step gas-phase polymerization of olefins

Details Process for multi-step gas-phase polymerization of olefins Process for multi-step gas-phase polymerization of olefins

1981-05-22

1983-06-28

Smith, Edward J.

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

Synthetic resins

Polymerizing in two or more physically distinct zones

526 88, 526125, 526901, C08F 234, C08F 1000

Patent

active

043906699

ABSTRACT:
In a process for polymerizing olefins in the gaseous phase in a first gas-phase polymerization zone and a second gas-phase polymerization zone, which are provided independently from each other, in the presence of a catalyst composed of a transition metal catalyst component and an organometallic compound of a metal of Groups I to III of the periodic table while feeding the catalyst-containing polymer formed in the first zone to the second zone; the improvement wherein

REFERENCES:
patent: 3254070 (1966-05-01), Roelen
patent: 3592880 (1971-07-01), Diedrick et al.
patent: 4012573 (1977-03-01), Trieschmann et al.
patent: 4048412 (1977-09-01), Caumartin et al.
patent: 4098974 (1978-07-01), Klaassen
patent: 4269948 (1981-05-01), Nicco
patent: 4291132 (1981-09-01), Clifford

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