Preparation of a solid Ziegler catalyst by using a multi-functional, pivoting, inclinable reactor
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United States of America Patent
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Dec 5, 1995
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N/A
app pub date -
Mar 22, 1994
filing date -
Nov 29, 1991
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Abstract
A method for the preparation of a solid procatalyst suitable for the polymerization of olefins wherein the procatalyst comprises a transition metal compound reacted with a carrier by carrying out in the method the following consecutive steps: (a) feeding the transition metal compound and particles of the carrier into a vessel, which in its initial position has an essentially horizontal bottom sieve, (b) mixing and reacting the metal transitional compound and the particles of the carrier to produce raw procatalyst particles and a liquid reaction residue, (c) removing the liquid reaction residue through the bottom sieve of the vessel, (d) washing the raw procatalyst particles with a washing liquid, so that impurities in the raw procatalyst are removed through the bottom sieve, (e) drying the washed raw procatalyst particles by conducting an inert gas therethrough to give the solid procatalyst, and (f) removing the solid procatalyst from the vessel.
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