Multi-stage process for the (CO) polymerization of olefins
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United States of America Patent
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Jan 31, 2006
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N/A
app pub date -
Mar 6, 2000
filing date -
Mar 9, 1999
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Abstract
Multi-stage process for the polymerization of olefins CH2═CHR, where R is hydrogen or a C1-C10 alkyl, cycloalkyl or aryl radical, comprising: (I) a first polymerization stage carried out in the presence of a catalyst comprising the product of the reaction between an alkyl-Al compound and a solid component comprising at least one compound of transition metal M1 not containing M1-π bonds, thus obtaining a porous polymer, (II) a treatment stage, wherein said porous polymer is contacted with a compound capable of deactivating the catalyst used in stage (I) and with a late transition metal complex; and (III) a second stage of polymerization, carried out in the presence of the product obtained from treatment stage (II).
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