Patent FR2434738A2 successfully refreshed from Google Patents.
US4194075A
Expired / Lapsed
US
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Magnesium reducing agent-hydrocarbylaluminum halide cocatalyst for titanium tetrahalide
Assignee: Phillips Petroleum Co
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Filing: 1978-05-02
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Granted: 1980-03-18
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Expires: 1998-05-02
Abstract
Abstract A magnesium reducing agent is prepared by reacting an organic halide with magnesium metal in the absence of an ether or other complexing diluent, preferably in the absence of any extraneous diluent, to form a magnesium reducing agent which is thereafter mixed with an organoaluminum halide to form a cocatalyst. The resulting cocatalyst is contacted with a titanium tetrahalide to give a catalyst. This catalyst is suitable for olefin polymerization and particularly suitable for the polymerization of ethylene. In one embodiment, the organic halide is added dropwise to the magnesium metal.
Inventors
- 👤 Richard E. Dietz
- 👤 Charles M. Selman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:33
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
147 words
A process comprising: reacting an organic halide having the formula RX or R'X 2 wherein X represents a halogen atom, R is selected from alkynyl, alkenyl, alkyl, aryl, cycloalkenyl, and cycloalkyl radicals and combinations thereof containing from 1 to 12 carbon atoms per molecule and R' is a saturated divalent hydrocarbyl radical containing from 2 to 10 carbon atoms per molecule and magnesium metal in the absence of a complexing diluent to form a magnesium reducing agent reaction mixture containing at least 10 weight percent each of a diorganomagnesium compound and magnesium halide; mixing the total magnesium reducing agent reaction mixture thus produced with a dihydrocarbylaluminum halide of the formula R" 2 AlX wherein R" is an alkyl or an aryl radical having 1 to 12 carbon atoms and X is a halogen atom to form a cocatalyst; and thereafter contacting said cocatalyst with a titanium tetrahalide.
Claim 2
Dependent Claim
147 words
A process comprising: reacting an organic halide having the formula RX or R'X 2 wherein X represents a halogen atom, R is selected from alkynyl, alkenyl, alkyl, aryl, cycloalkenyl, and cycloalkyl radicals and combinations thereof containing from 1 to 12 carbon atoms per molecule and R' is a saturated divalent hydrocarbyl radical containing from 2 to 10 carbon atoms per molecule and magnesium metal in the absence of a complexing diluent to form a magnesium reducing agent reaction mixture containing at least 10 weight percent each of a diorganomagnesium compound and magnesium halide; mixing the total magnesium reducing agent reaction mixture thus produced with a dihydrocarbylaluminum halide of the formula R" 2 AlX wherein R" is an alkyl or an aryl radical having 1 to 12 carbon atoms and X is a halogen atom to form a cocatalyst; and thereafter contacting said cocatalyst with a titanium tetrahalide.
Claim 3
Dependent Claim
24 words
A method according to claim 1 wherein said organic halide is added slowly to said magnesium metal in the absence of any extraneous diluent.
Claim 4
Dependent Claim
13 words
A method according to claim 1 wherein said titanium tetrahalide is titanium tetrachloride.
Claim 5
Dependent Claim
21 words
A method according to claim 1 wherein there is added in addition a polar organic compound which is an electron donor.
Claim 6
Dependent Claim
27 words
A method according to claim 4 wherein said polar organic compound is ethyl benzoate and is added to said titanium tetrahalide prior to contact with said cocatalyst.
Claim 7
Dependent Claim
17 words
A method according to claim 1 wherein said organic halide is added dropwise to said magnesium metal.
Claim 8
Dependent Claim
38 words
A method according to claim 6 wherein said organic halide has the formula RX wherein R is an alkynyl, alkenyl, alkyl, aryl, cycloalkenyl, or cycloalkyl radical having 1 to 12 carbon atoms and X is chlorine or bromine.
Claim 9
Dependent Claim
22 words
A method according to claim 7 wherein the atom ratio of aluminum to titanium is within the range of 200:1 to 3300:1.
Claim 10
Dependent Claim
38 words
A method according to claim 8 wherein the atom ratio of aluminum to magnesium is within the range of 0.1:1 to 2:1 and wherein said organic halide is added to said magnesium metal in an about stoichiometric amount.
Claim 11
Dependent Claim
13 words
A method according to claim 9 wherein said dihydrocarbylaluminum halide is diethylaluminum chloride.
Claim 12
Dependent Claim
40 words
A method according to claim 10 wherein said organic halide is n-pentyl chloride and the temperature during said addition of said organic halide is the reflux temperature of said organic halide, said organic halide being added dropwise to said magnesium.
Claim 13
Dependent Claim
9 words
A catalyst produced by the method of claim 11.
Claim 14
Dependent Claim
9 words
A catalyst produced by the method of claim 1.
Claim 15
Dependent Claim
18 words
A polymerization process comprising contacting at least one mono-1-olefin under polymerization conditions with the catalyst of claim 1.
Claim 16
Dependent Claim
55 words
A method according to claim 14 wherein said polymerization is carried out in the presence of a diluent under conditions of temperature and pressure such that said diluent is in the liquid phase and the resulting polymer is insoluble in said diluent, said catalyst being used without the subsequent addition of an organoaluminum compound activator.
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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) | 1983-03-18 | 1983-09-17 | 1984-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-18 | 1987-09-17 | 1988-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-18 | 1991-09-17 | 1992-03-18 | $7700.00 | Window Closed / Lapsed |