EP0032308A2
Expired / Lapsed
EP
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Ethylene polymerisation process
Assignee: Imperial Chemical Industries Ltd
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Filing: 1980-12-22
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Granted: —
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Expires: 2000-12-22
Abstract
Abstract Ethylene is polymerised, or copolymerised with another olefin monomer, using a catalyst system comprising an organic metal compound and a titanium-containing material which is obtained by reacting together an inert particulate material, an organic magnesium compound, a halogen-containing compound such as carbon tetrachloride, silicon tetrachloride, trichlorosilane, phosphorus trichloride or boron trichloride, and titanium tetrachloride. The process can be used to effect copolymerisation of ethylene with an alpha-olefin monomer such as butene-1 in a fluidised bed reactor.
Inventors
- 👤 Anthony David Caunt
- 👤 Paul David Gavens
- 👤 John Mcmeeking
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 03:40
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
189 words
A process for the production of an ethylene polymer which process comprises contacting ethylene, or a mixture of ethylene and a monomer which is copolymerisable with ethylene, under polymerisation conditions with a catalyst system obtained by mixing together 1) an organic compound of a metal of Group IIA of the Periodic Table or of aluminium, or a complex of an organic compound of a metal of Group IA or Group IIA of the Periodic Table with an organic compound of aluminium; and 2) a titanium-containing composition, characterised in that the titanium-containing composition is a reaction product obtained by reacting together reagents consisting of a component I, a component II, a component III, and a component IV, wherein component I is at least one substantially inert solid particulate material having reactive sites, component II is an organic magnesium compound or a complex or mixture of an organic magnesium compound and an aluminium compound, component III is at least one halogen-containing compound selected from hydrogen halides, boron halides, halogens, inter-halogen compounds and halides of elements of Groups IVB, VB and VIB of the Periodic Table, and component IV is titanium tetrachloride.
Claim 2
Dependent Claim
189 words
A process for the production of an ethylene polymer which process comprises contacting ethylene, or a mixture of ethylene and a monomer which is copolymerisable with ethylene, under polymerisation conditions with a catalyst system obtained by mixing together 1) an organic compound of a metal of Group IIA of the Periodic Table or of aluminium, or a complex of an organic compound of a metal of Group IA or Group IIA of the Periodic Table with an organic compound of aluminium; and 2) a titanium-containing composition, characterised in that the titanium-containing composition is a reaction product obtained by reacting together reagents consisting of a component I, a component II, a component III, and a component IV, wherein component I is at least one substantially inert solid particulate material having reactive sites, component II is an organic magnesium compound or a complex or mixture of an organic magnesium compound and an aluminium compound, component III is at least one halogen-containing compound selected from hydrogen halides, boron halides, halogens, inter-halogen compounds and halides of elements of Groups IVB, VB and VIB of the Periodic Table, and component IV is titanium tetrachloride.
Claim 3
Dependent Claim
19 words
"A'process as claimed in claim 1 characterised in that ethylene is copolymerised with propylene, butene-1, pentene-1, hexene-1 or 4-methylpentene-l.
Claim 4
Dependent Claim
47 words
A process as claimed in claim 1 or claim 2 characterised in that a mixture of ethylene and another monomer is contacted with the catalyst system, wherein, in the mixture, the molar ratio of ethylene to the other monomer is in the range from 15:1 to 1:1.
Claim 5
Dependent Claim
22 words
A process as claimed, in any one of claims 1 to 3 characterised in that polymerisation is effected in the gas phase.
Claim 6
Dependent Claim
25 words
A process as claimed in any one of claims 1 to 4 characterised in that component 1) of the catalyst system is an aluminium trialkyl.
Claim 7
Dependent Claim
155 words
A process as claimed in any one of claims 1 to 5 characterised=in that component 2) of the catalyst system is a reaction product obtained by reacting together a component I which is an oxide of a metal, including silicon, of Groups I to IV of the Periodic Table; a component II which is a dihydrocarbyl magnesium compound; a component III which is a hydrogen halide, a silicon halide of the formula a hydrocarbyl halide of the formula a phosphorus halide, a phosphorus oxyhalide, a boron halide, chlorine or bromine; and a component IV which is titanium tetrachloride, wherein R 3 is a hydrogen atom or a hydrocarbon radical; R 5 is the residue obtained by removing one or more hydrogen atoms from a hydrocarbon compound; Z is a halogen atom other than fluorine; d is 0 or an integer from 1 up to 3; and e is an integer from 1 up to 10.
Claim 8
Dependent Claim
97 words
A process as claimed in any one of claims 1 to 6 characterised in that component 2) of the catalyst system has been obtained either a) by mixing together all of components I, II, III and IV in a single stage or b) by reacting components II, III and IV with component I in more than one stage subject to the proviso either i) that at least one further component which is component II and/or component IV is added after the addition of component III or ii) the last stage is effected by reaction with component IV.
Claim 9
Dependent Claim
71 words
A process as claimed in any one of claims 1 to 7 characterised in that component 2) of the catalyst system is the reaction product obtained by adding components II, III and IV in turn to component I to give more than one stage and the process is effected without separating the reaction product from the reaction mixture of one stage before adding a further component to effect the next stage.
Claim 10
Dependent Claim
69 words
A process as claimed in any one of claims 1 to 7 characterised in that component 2) of the catalyst system is the reaction product obtained by adding components II, III and IV in sequence to component I to give more than one stage and, between at least two of the stages, the reaction product from one stage is separated and washed before being subjected to the next stage.
Claim 11
Dependent Claim
75 words
A process as claimed in any one of claims 1 to 7 and 9 characterised in that component 2) of the catalyst system is the reaction product obtained by reacting components II, III and IV with component I in more than one stage, using an excess of at least one of components II, III or IV, and separating and washing the reaction product at the end of any stage in which an excess is used.
References Cited (Backward Citations)
No citation records indexed.
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