EP0027366A1
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EP
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Method for polymerizing ethylene
Assignee: Ube Corp
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Filing: 1980-10-10
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Granted: —
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Expires: 2000-10-10
Abstract
Abstract An ethylene polymer is produced with an excellent yield by bringing a feed containing ethylene into contact with a catalyst which comprises (A) a solid catalytic ingredient prepared (a) by reacting a Grignard compound with an aluminium halide-tetraalkoxysilane reaction produce and (b) bringing the resultant reaction product into contact with titanium tetrahalide and; (B) another catalytic ingredient consisting of a trialkyl aluminium.
Inventors
- 👤 Haruo Ueno
- 👤 Takefumi Yano
- 👤 Michimasa Shimizu
- 👤 Masanori Tamura
- 👤 Sakae Yuasa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 19:10
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/02
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
75 words
A method for polymerizing ethylene which comprises bringing a feed containing ethylene into contact with a catalyst comprising (A) solid catalytic ingredient which has been prepared in such a manner that (a) a Grignard compound is reacted with a reaction product of an aluminium halide with a tetraalkoxysilane, and (b) the resultant solid reaction product is brought into contact with a titanium tetrahalide; and (B) another catalytic ingredient consisting of at least one trialkyl aluminium.
Claim 2
Independent Claim
75 words
A method for polymerizing ethylene which comprises bringing a feed containing ethylene into contact with a catalyst comprising (A) solid catalytic ingredient which has been prepared in such a manner that (a) a Grignard compound is reacted with a reaction product of an aluminium halide with a tetraalkoxysilane, and (b) the resultant solid reaction product is brought into contact with a titanium tetrahalide; and (B) another catalytic ingredient consisting of at least one trialkyl aluminium.
Claim 3
Dependent Claim
27 words
A method as claimed in claim 1, wherein the contact of said feed with said catalyst is carried out at a temperature of from 30 to 100°C.
Claim 4
Dependent Claim
28 words
A method as claimed in claim 1, wherein the contact of said feed with said catalyst is effected under a pressure of from 1 to 80 kg/cm .
Claim 5
Dependent Claim
25 words
A method as claimed in claim 1, wherein said aluminium halide is selected from the group consisting of aluminium chloride, aluminium bromide and aluminium iodide.
Claim 6
Dependent Claim
34 words
A method as claimed in claim 1, wherein said tetraalkoxysilane is selected from those of the formula Si(OR 1 ) 4 wherein R 1 represents an alkyl radical having 1 to 8 carbon atoms.
Claim 7
Dependent Claim
27 words
A method as claimed in claim 1, wherein said aluminium halide is used in an amount of from 0.25 to 10 moles per mole of said tetraalkoxysilane.
Claim 8
Dependent Claim
46 words
A method as claimed in claim 1, wherein said Grignard compound to be used in Step (A) is selected from those of the formula, R 2 MgX, wherein R 2 represents an alkyl radical having 1 to 8 carbon atoms and X represents a halogen atom.
Claim 9
Dependent Claim
30 words
A method as claimed in claim 1, wherein in Step (A) said Grignard compound is used in an amount of from 0.05 to 4 moles per mole of said tetraalkoxysilane.
Claim 10
Dependent Claim
24 words
A method as claimed in claim 1, wherein said reaction of Step (a) is carried out at a temperature of from -50 to 100°C.
Claim 11
Dependent Claim
39 words
A method as claimed in claim 1, wherein the solid reaction product in Step (a) is washed with an organic solvent consisting of at least one member selectec r- from the group consisting of benzene, toluene, hexane and heptane.
Claim 12
Dependent Claim
27 words
A method as claimed in claim 1, wherein said titanium tetrahalide to be used in Step (b) is selected from titanium tetrachloride, titanium tetrabromide, and titanium tetraiodide.
Claim 13
Dependent Claim
34 words
A method as claimed in claim 1, wherein in Step (b), said titanium tetrahalide is used in an amount of at least one mole per mole of said Grignard compound used in Step (A).
Claim 14
Dependent Claim
33 words
A method as claimed in claim 1, wherein the contact of said solid reaction product with said titanium tetrahalide in Step (b) is carried out at a temperature of from 20 to 200°C.
Claim 15
Dependent Claim
20 words
A method as claimed in claim 1, wherein said solid catalytic ingredient contains 0.5 to 10% by weight of titanium.
Claim 16
Dependent Claim
33 words
A method as claimed in claim 1, wherein said trialkyl aluminium is selected from those of the formula, Al R , wherein R represents an alkyl radical having 2 to 6 carbon atoms.
Claim 17
Dependent Claim
33 words
A method as claimed in claim 1, wherein said trialkyl aluminium is used in an amount of from 1 to 1000 moles per gram atom of titanium contained in said solid catalytic ingredient.
Claim 18
Dependent Claim
16 words
A method as claimed in claim 1, wherein said catalyst is suspended in a polymerization medium.
Claim 19
Dependent Claim
36 words
A method as claimed in claim 17, wherein said catalyst suspended in said polymerization medium is in an amount, in terms of elemental titanium, of 0.001 to 10 milligram atoms per liter of said polymerization medium.
Claim 20
Dependent Claim
36 words
A method as claimed in claim 17, wherein said catalyst suspended in said polymerization medium is in an amount, in terms of the trialkyl aluminium, of 0.001 to 1,000 millimoles per liter of said polymerization medium.
Claim 21
Dependent Claim
25 words
A method as claimed in claim 1, wherein said feed contains, in addition to ethylene, at least one α-olefin having 3 or more carbon atoms.
Claim 22
Dependent Claim
22 words
A method as claimed in claim 20, wherein said α-olefin is selected from the group consisting of propylene, 1-butene, 4-methyl-l-pentene and 1-hexene.
References Cited (Backward Citations)
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