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1. WO1985000371 - USE OF ALKYLALUMINUM COMPOUNDS AND HYDROXYL-CONTAINING COMPOUNDS TO INITIATE POLYMERIZATION OF ETHYLENE WITH CHROMIUM OXIDE CATALYSTS

Publication Number WO/1985/000371
Publication Date 31.01.1985
International Application No. PCT/US1984/000970
International Filing Date 27.06.1984
IPC
C08F 10/02 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
10Homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
02Ethene
CPC
C08F 10/02
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
10Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
02Ethene
Y10S 526/901
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
526Synthetic resins or natural rubbers -- part of the class 520 series
901Monomer polymerized in vapor state in presence of transition metal containing catalyst
Y10S 526/912
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
526Synthetic resins or natural rubbers -- part of the class 520 series
912Reaction medium purification
Applicants
  • UNION CARBIDE CORPORATION [US]/[US]
Inventors
  • WILLIAMS, Gary, Harry
  • KAROL, Frederick, John
Agents
  • PISCITELLO, John, S.
Priority Data
509,60230.06.1983US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) USE OF ALKYLALUMINUM COMPOUNDS AND HYDROXYL-CONTAINING COMPOUNDS TO INITIATE POLYMERIZATION OF ETHYLENE WITH CHROMIUM OXIDE CATALYSTS
(FR) UTILISATION DE COMPOSES D'ALKYLE ALUMINIUM ET DE COMPOSES CONTENANT DE L'HYDROXYLE POUR DECLENCHER LA POLYMERISATION DE L'ETHYLENE AVEC DES CATALYSEURS A BASE D'OXYDE DE CHROME
Abstract
(EN)
A method for smoothly and reliably initiating polymerization of ethylene with a supported chromium oxide catalyst, with smaller amounts of catalyst and in substantially shorter periods of time then heretofore required, by adding an alkylaluminum compound and ahydroxyl-containing compound to the reactor of a polymerization reaction system prior to the commencement of polymerization and subjecting said alkylaluminum compound and hydroxyl-containing compound to suitable conditions of temperature and pressure for a time sufficient for said alkylaluminum compound to react completely with the moisture present in said reactor and said hydroxyl-containing compound.
(FR)
Procédé permettant de déclencher en douceur et de manière fiable la polymérisation de l'éthylène avec un catalyseur supporté à base d'oxyde de chrome, avec de petites quantités d'un catalyseur et en des laps de temps sensiblement plus courts qu'auparavant, en ajoutant un composé d'alkyle aluminium et un composé contenant de l'hydroxyle au réacteur d'un système de réaction de polymérisation avant le commencement de la polymérisation et en soumettant ce composé d'alkyle aluminium ainsi que le composé contenant de l'hydroxyle à des conditions appropriées de température et de pression pendant un laps de temps suffisant pour que le composé d'alkyle aluminium réagisse complètement avec l'humidité présente dans le réacteur ainsi qu'avec le composé contenant de l'hydroxyle.
Also published as
FI850832
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