Process for preparing polyolefins

Details Process for preparing polyolefins Process for preparing polyolefins

1983-03-22

1984-09-04

Michl, Paul R.

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

Synthetic resins

Effecting a change in a polymerization process in response...

526 60, C08F 234

Patent

active

044698534

ABSTRACT:
The invention is to provide an improved process for preparing polyolefins having predetermined properties, in particular, melt index and/or density by polymerizing olefin in the presence of a Ziegler catalyst and hydrogen. The parameters corresponding to the concentrations of olefin and hydrogen, participating in the properties, in the gas phase of reactor are detected by high-speed gaschromatography. The detected signals are applied to a computer.
The feed volumes of olefin and hydrogen into the reactor are controlled by means of an operation control output, and the respective concentrations in the reactor are controlled. Consequently, the resulting polyolefins possess extremely stable and uniform properties.

REFERENCES:
patent: 3130187 (1964-04-01), Tolin
patent: 3254071 (1966-05-01), Morgan
patent: 3356667 (1967-12-01), Smith
patent: 3476729 (1969-11-01), Smith
patent: 3817962 (1974-06-01), Smith
patent: 3998995 (1976-12-01), Buss

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