Treatment of catalyst particles

Details Treatment of catalyst particles Treatment of catalyst particles

1987-07-09

1989-04-04

Sever, Frank

Liquid purification or separation

Processes

Separating

210772, 210803, 210804, 210806, E01D 1700, E01D 4502

Patent

active

048184179

ABSTRACT:
The invention relates to processes and apparatus for the elutriation of particles of a Ziegler-Natta type alpha-olefin polymerization catalyst, based on transition metal compound(s) and preferably also comprising magnesium compounds, by means of an elutriation liquid which is a non-polar liquid, for example a hydrocarbon chemically inert in relation to the catalyst. A preferred process comprises the following stages:

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patent: 3931134 (1976-01-01), Hartmann et al.
patent: 3990996 (1956-11-01), Sandor et al.
patent: 4203867 (1980-05-01), Bye
patent: 4213878 (1980-07-01), Bye
patent: 4287088 (1981-09-01), Sirker
patent: 4301265 (1981-11-01), Bye
patent: 4340502 (1982-07-01), Bye
patent: 4354959 (1982-10-01), Epstein
patent: 4370449 (1983-01-01), Bye

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