Zirconium and/or hafnium based catalyst for the polymerization of unsaturated compounds

Zirconium and/or hafnium based catalyst for the polymerization of unsaturated compounds

A catalyst comprising zirconium and/or hafnium is prepared by the following steps: (a) vaporization in vacuo of magnesium and reaction of the thus obtained vapour with a compound of quadrivalent titanium in the presence of a halogen donor and of a compound of zirconium and/or hafnium; (b) thermal tr...

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Hauptverfasser: ANGELO MOALLI, MARGHERITA CORBELLINI
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Sprache:eng
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CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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creator ANGELO MOALLI
MARGHERITA CORBELLINI
description A catalyst comprising zirconium and/or hafnium is prepared by the following steps: (a) vaporization in vacuo of magnesium and reaction of the thus obtained vapour with a compound of quadrivalent titanium in the presence of a halogen donor and of a compound of zirconium and/or hafnium; (b) thermal treatment of a mixture comprising an alcohol of the formula ROH, wherein R is an aliphatic, linear or branched chain, containing from 1 to 10 carbon atoms, optionally substituted by one or more aromatic groups, and the solution prepared in step (a); (c) thermal treatment of a mixture comprising an organometallic aluminium compound of the formula AIR'3-yXy wherein R' is a hydrocarbon radical, X is a halogen atom and y is a number of from 0 to 2 inclusive, such that 1
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The catalyst is used for the polymerisation of unsaturated compounds.</abstract><edition>4</edition><oa>free_for_read</oa></addata></record>
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subjects CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
title Zirconium and/or hafnium based catalyst for the polymerization of unsaturated compounds
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