Installation and process for the gas-phase polymerization of ole

Details Installation and process for the gas-phase polymerization of ole Installation and process for the gas-phase polymerization of ole

1989-07-17

1991-07-02

Schofer, Joseph L.

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

Synthetic resins

Removing and recycling removed material from an ongoing...

526 74, 526104, 526112, 526151, 526901, C08F 234

Patent

active

050286692

ABSTRACT:
A process for polymerizing olefins in the presence of a Ziegler-Natta type catalyst or a catalyst based on chromium oxide using a gas-phase fluidized-bed reactor (1) having a recycle line (5) for removing the olefin-containing gas from the top of the reactor and returning it to the bottom of the reactor, the recycle line having at least one heat exchanger (7,10) for cooling the olefin-containing gas, which process comprises introducing an organometallic compound, as a mixture or as a solution in at least one C.sub.3 to C.sub.12 liquid olefin, into the recycle line at a point upstream of a heater exchanger (10).

REFERENCES:
patent: 3770714 (1973-11-01), Dorschner et al.
patent: 4593009 (1986-06-01), Nowlin

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