Method for preparing active carrier particles of equal size for a polymerization catalyst
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United States of America Patent
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May 18, 1999
Grant Date -
N/A
app pub date -
Nov 30, 1993
filing date -
May 31, 1991
priority date (Note) -
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Abstract
The active carrier particles of even size of the polymerization catalyst are prepared so that a melt of a complex composition is provided having the formula (I) MgCl.sub.2 nROH mED (I) in which ROH depicts an aliphatic alcohol, R is a C.sub.1 -C.sub.6 alkyl, ED depicts an electron donor, n is 1 to 6 and m is 0 to 1; the melt provided is fed to a nozzle (4); the melt is sprayed from the nozzle (4) to the spraying area (5), in which it is divided into fine melt droplets and possibly partly solidifies; the possibly partly solidified melt particles are transferred to a cooled crystallization area (6), where they crystallize to solid carrier particles; and the solid carrier particles are recovered. The melt mentioned is sprayed through a nozzle (4), which is rotated or which has attached to it a member that rotates and throws melt outwards from the rotating center to the spraying area (5).
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