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US4295992A
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Support prepared from organomagnesium compounds and silicon halides; and catalysts for polymerizing olefins
Assignee: Dow Chemical Co
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Filing: 1980-06-17
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Granted: 1981-10-20
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Expires: 2000-06-17
Abstract
Abstract A catalyst for the polymerization of olefins is prepared by the reaction of an aliphatic alcohol such as n-propyl alcohol with a mixture of an alkyl magnesium compound such as n-butyl, sec-butyl magnesium and a silicon tetrahalide such as SiCl 4 . After washing the precipitate several times with a hydrocarbon such as hexane, it is suspended in a hydrocarbon such as hexane and an organic titanium compound such as TiCl 4 is added after which a suitable reducing agent such as diethyl aluminum chloride is added. The thus formed solid catalyst is washed several times with a hydrocarbon solvent such as hexane.
Inventors
- 👤 Ronald L. Gibbs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:06
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
135 words
A catalyst support which comprises the reaction product formed by reacting (1) a mixture of an organomagnesium compound represented by the formula MgR 2 and a silicon halide represented by the formula R' 4-n SiX n , said mixture being in a non-polar solvent, with (2) an alcohol represented by the formula R"OH; wherein the organomagnesium compound is or can be rendered hydrocarbon soluble and wherein each R, R' and R" is independently an aliphatic hydrocarbon group having from 1 to about 20 carbon atoms, X is Cl, Br or I, n has a value of from 1 to 4 and wherein the molar ratio of R"OH:MgR 2 is at least 2:1 and the molar ratio of R"OH:R' 4-n SiX n is sufficient so as to provide at least one X group per OH group.
Claim 2
Dependent Claim
135 words
A catalyst support which comprises the reaction product formed by reacting (1) a mixture of an organomagnesium compound represented by the formula MgR 2 and a silicon halide represented by the formula R' 4-n SiX n , said mixture being in a non-polar solvent, with (2) an alcohol represented by the formula R"OH; wherein the organomagnesium compound is or can be rendered hydrocarbon soluble and wherein each R, R' and R" is independently an aliphatic hydrocarbon group having from 1 to about 20 carbon atoms, X is Cl, Br or I, n has a value of from 1 to 4 and wherein the molar ratio of R"OH:MgR 2 is at least 2:1 and the molar ratio of R"OH:R' 4-n SiX n is sufficient so as to provide at least one X group per OH group.
Claim 3
Dependent Claim
87 words
The catalyst support of claim 1 wherein R has from about 2 to about 8 carbon atoms, R' has from about 1 to about 6 carbon atoms, R" is an aliphatic group having from about 1 to about 6 carbon atoms, X is chlorine or bromine; wherein the ratio of R"OH:R' 4-n SiX n is sufficient so as to provide from 2 to about 3 X groups per OH group; and wherein said non-polar solvent has a hydrocarbon having from about 5 to about 10 carbon atoms.
Claim 4
Dependent Claim
94 words
The catalyst support of claim 2 wherein the organomagnesium compound is selected from the group consisting of dibutyl magnesium, butyl isobutyl magnesium, butyl ethyl magnesium, dihexyl magnesium, ethyl hexyl magnesium, butyl octyl magnesium, dioctyl magnesium and mixtures thereof; the alcohol is selected from the group consisting of ethanol, n-propanol, isopropanol, n-butanol, sec-butanol and mixtures thereof; and the silicon halide is selected from the group consisting of SiCl 4 , CH 3 SiCl 3 , (CH 3 ) 2 SiCl 2 , (CH 3 ) 3 SiCl, SiBr 4 , (Et)SiCl 3 and mixtures thereof.
Claim 5
Dependent Claim
30 words
The catalyst support of claims 1, 2 or 3 wherein component (2) is added in a controlled manner to component (1) at a temperature of about 100° C. or less.
Claim 6
Dependent Claim
18 words
The catalyst support of claim 4 wherein the temperature is from about 0° C. to about 70° C.
Claim 7
Dependent Claim
30 words
The catalyst support of claims 1, 2 or 3 wherein component (1) is added in a controlled manner to component (2) at a temperature of about 100° C. or less.
Claim 8
Dependent Claim
18 words
The catalyst support of claim 6 wherein the temperature is from about 0° C. to about 70° C.
Claim 9
Dependent Claim
17 words
The catalyst support of claim 7 wherein component (2) is said alcohol dissolved in a non-polar solvent.
Claim 10
Dependent Claim
87 words
A catalyst composition resulting from the addition of a reducing agent to a mixture of the support of claims 1, 2 or 3 suspended in an inert liquid hydrocarbon and a transition metal compound of Groups 4b, 5b, 6b, 7b, or 8 of Mendeleev's Periodic Table under conditions so as to produce a catalytically active product and in proportions such that the magnesium: transition metal atomic ratio is from about 0.1:1 to about 30:1 followed by washing the resultant solid catalyst product with an inert liquid hydrocarbon.
Claim 11
Dependent Claim
22 words
The catalyst composition of claim 9 wherein the transition metal compound is that of a metal selected from Groups 4b or 5b.
Claim 12
Dependent Claim
14 words
The catalyst composition of claim 10 wherein the transition metal is titanium or vanadium.
Claim 13
Dependent Claim
79 words
A catalyst composition resulting from the addition of a reducing agent at a temperature below about 100° C. to a mixture of the support of claim 6 suspended in an inert liquid hydrocarbon and a transition metal compound of Groups 4b, 5b, 6b, 7b, or 8 of Mendeleev's Periodic Table in proportions such that the magnesium:transition metal atomic ratio is from about 0.1:1 to about 30:1 followed by washing the resultant solid catalyst product with an inert liquid hydrocarbon.
Claim 14
Dependent Claim
40 words
The catalyst composition of claim 12 wherein the transition metal compound is that of a metal selected from groups 4b or 5b and wherein the reducing agent is added in a controlled manner at a temperature below about 70° C.
Claim 15
Dependent Claim
14 words
The catalyst composition of claim 13 wherein the transition metal is titanium or vanadium.
Claim 16
Dependent Claim
79 words
The catalyst composition resulting from the addition of a reducing agent at a temperature below about 100° C. to a mixture of the support of claim 4 suspended in an inert liquid hydrocarbon and a transition metal compound of Groups 4b, 5b, 6b, 7b, or 8 or Mendeleev's Periodic Table in proportions such that the magnesium:transition metal atomic ratio is from about 0.1:1 to about 30:1 followed by washing the resultant solid catalyst product with an inert liquid hydrocarbon.
Claim 17
Dependent Claim
40 words
The catalyst composition of claim 15 wherein the transition metal compound is that of a metal selected from groups 4b or 5b and wherein the reducing agent is added in a controlled manner at a temperature below about 70° C.
Claim 18
Dependent Claim
14 words
The catalyst composition of claim 16 wherein the transition metal is titanium or vanadium.
Claim 19
Dependent Claim
20 words
The catalyst composition of claim 17 wherein the atomic ratio of magnesium:transition metal is from about 0.2:1 to about 3:1.
Claim 20
Dependent Claim
58 words
The catalyst composition of claim 18 which contains, as a co-catalyst, an organometallic compound which is a halide, hydride or totally alkylated derivative of the metals of Groups 1a, 2a, 3a or 4a of the Periodic Table, or mixtures thereof, and is present in quantities such that the metal:transition metal ratio is from about 1:1 to about 200:1.
Claim 21
Dependent Claim
14 words
The catalyst composition of claim 19 wherein the co-catalyst is a derivative of aluminum.
Claim 22
Dependent Claim
19 words
The catalyst composition of claim 20 wherein the transition metal compound is titanium tetrachloride and the co-catalyst is triisobutylaluminum.
Claim 23
Dependent Claim
84 words
The catalyst composition resulting from the addition of a reducing agent to a mixture of the support of claim 6 suspended in an inert liquid hydrocarbon and a transition metal compound of Groups 4b, 5b, 6b, 7b, or 8 of Mendeleev's Periodic Table under conditions so as to produce a catalytically active product and in proportions such that the magnesium: transition metal atomic ratio is from about 0.1:1 to about 30:1 followed by washing the resultant solid catalyst product with an inert liquid hydrocarbon.
Claim 24
Dependent Claim
84 words
A catalyst composition resulting from the addition of a reducing agent to a mixture of the support of claim 7 suspended in an inert liquid hydrocarbon and a transition metal compound of Groups 4b, 5b, 6b, 7b, or 8 of Mendeleev's Periodic Table under conditions so as to produce a catalytically active product and in proportions such that the magnesium: transition metal atomic ratio is from about 0.1:1 to about 30:1 followed by washing the resultant solid catalyst product with an inert liquid hydrocarbon.
Claim 25
Dependent Claim
84 words
A catalyst composition resulting from the addition of a reducing agent to a mixture of the support of claim 8 suspended in an inert liquid hydrocarbon and a transition metal compound of Groups 4b, 5b, 6b, 7b, or 8 of Mendeleev's Periodic Table under conditions so as to produce a catalytically active product and in proportions such that the magnesium: transition metal atomic ratio is from about 0.1:1 to about 30:1 followed by washing the resultant solid catalyst product with an inert liquid hydrocarbon.
Claim 26
Dependent Claim
22 words
The catalyst composition of claim 22 wherein the transition metal compound is that of a metal selected from Groups 4b or 5b.
Claim 27
Dependent Claim
22 words
The catalyst composition of claim 23 wherein the transition metal compound is that of a metal selected from Groups 4b or 5b.
Claim 28
Dependent Claim
22 words
The catalyst composition of claim 24 wherein the transition metal compound is that of a metal selected from Groups 4b or 5b.
Claim 29
Dependent Claim
14 words
The catalyst composition of claim 25 wherein the transition metal is titanium or vanadium.
Claim 30
Dependent Claim
14 words
The catalyst composition of claim 26 wherein the transition metal is titanium or vanadium.
Claim 31
Dependent Claim
14 words
The catalyst composition of claim 27 wherein the transition metal is titanium or vanadium.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-19 | 1985-04-20 | 1985-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-19 | 1989-04-20 | 1989-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-19 | 1993-04-20 | 1993-10-20 | $7700.00 | Window Closed / Lapsed |