Treatment of catalyst particles

Details Treatment of catalyst particles Treatment of catalyst particles

1988-11-18

1990-06-05

Sever, Frank

Liquid purification or separation

Processes

Separating

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

Patent

active

049311930

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:

REFERENCES:
patent: 3925338 (1975-12-01), Ort
patent: 3931134 (1976-01-01), Hartmann et al.
patent: 3990996 (1976-11-01), Sandor Oak et al.
patent: 4098979 (1978-07-01), Maemoto et al.
patent: 4111835 (1978-09-01), Foechini et al.
patent: 4329440 (1982-05-01), Kokubo et al.
patent: 4354959 (1982-10-01), Epstein
patent: 4399054 (1983-08-01), Ferravis et al.

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