Catalyst – solid sorbent – or support therefor: product or process – Forming or treating a sphere – process only – Forming other than by liquid immersion
Patent
1991-09-16
1993-04-20
Garvin, Patrick P.
Catalyst, solid sorbent, or support therefor: product or process
Forming or treating a sphere, process only
Forming other than by liquid immersion
502107, 502108, 502110, 502111, 502113, 502125, 502126, 502127, B01J 3508
Patent
active
052043037
ABSTRACT:
The invention relates to a method for the preparation of a supported procatalyst intended for the polymerization of olefines, in which particles are formed of magnesium dihalide and alcohol, the particles are reacted with an organic compound of a metal from the groups I-III, the thus obtained particulate product is activated by means of a titanium and/or vanadium compound and optionally a donor, and optionally a prepolymerization is carried out for the activated particles. A problem of such a method is how to form particles of magnesium dihalogenide and alcohol having a structure advantageous for the polymerization of olefins. The problem has in the present invention been solved so that the particles are formed by spray crystallizing (spray freezing) a mixture of magnesium dihalide and alcohol to complex particles of magnesium dihalide and alcohol. The hydroxyl content of the particles so obtained is much greater than earlier, which results in a much more active procatalyst than the preceding ones.
REFERENCES:
patent: 4071674 (1978-01-01), Kashiwa et al.
patent: 4076924 (1978-02-01), Toyota et al.
patent: 4295991 (1981-10-01), Wristers
patent: 4829034 (1989-05-01), Iiskolan et al.
Gustatsson Bill B. B.
Iiskola Fero I.
Knuuttila Hilkka R.
Korvenoja Inkeri T.
Kostiainen Arja-Liisa
Garvin Patrick P.
Neste Oy
Peebles Brent M.
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