US4532313A
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Method for preparing an improved catalyst support, Ziegler-Natta catalyst utilizing said support and polymerization of 1-olefins utilizing said catalyst
Assignee: Himont Inc
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Filing: 1984-08-20
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Granted: 1985-07-30
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Expires: 2004-08-20
Abstract
Abstract Disclosed is a transition metal component of a Ziegler-Natta catalyst which is composed of a titanium halide deposited on an essentially anhydrous magnesium chloride support. An improved support is prepared by contacting a hydrocarbon solution of magnesium alkanoate and a hydrocarbon solution of alkylaluminum dichloride in a liquid hydrocarbon reaction medium containing alkylaluminum dichloride and alkylaluminum alkanoate chloride. After workup and treatment with the titanium halide, the transition metal component is used in the Ziegler-Natta catalysis polymerization of 1-olefins. The resulting polyolefins have a narrow particle size distribution and a high bulk density.
Inventors
- 👤 Albert S. Matlack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:20
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
139 words
In a process for the preparation of an essentially anhydrous magnesium chloride support for use in the polymerization of 1-olefins, having the steps of (1) precipitating the product formed by contacting a hydrocarbon solution of a magnesium alkanoate with a hydrocarbon solution of an alkylaluminum dichloride, (2) isolating the precipitation product from the hydrocarbon precipitation medium, (3) successively washing the precipitation product with a hydrocarbon solvent, (4) contacting the washed precipitation product with an electron donor, and (5) washing the electron donor-treated precipitation product with a hydrocarbon solvent, the improvement which comprises contacting the hydrocarbon solution of said magnesium alkanoate with the hydrocarbon solution of said alkylaluminum dichloride in a liquid hydrocarbon reaction medium containing from about 0.05 to about 0.6 mole alkylaluminum dichloride per liter and from about 0.05 to about 0.8 mole alkylaluminum alkanoate chloride per liter.
Claim 2
Dependent Claim
139 words
In a process for the preparation of an essentially anhydrous magnesium chloride support for use in the polymerization of 1-olefins, having the steps of (1) precipitating the product formed by contacting a hydrocarbon solution of a magnesium alkanoate with a hydrocarbon solution of an alkylaluminum dichloride, (2) isolating the precipitation product from the hydrocarbon precipitation medium, (3) successively washing the precipitation product with a hydrocarbon solvent, (4) contacting the washed precipitation product with an electron donor, and (5) washing the electron donor-treated precipitation product with a hydrocarbon solvent, the improvement which comprises contacting the hydrocarbon solution of said magnesium alkanoate with the hydrocarbon solution of said alkylaluminum dichloride in a liquid hydrocarbon reaction medium containing from about 0.05 to about 0.6 mole alkylaluminum dichloride per liter and from about 0.05 to about 0.8 mole alkylaluminum alkanoate chloride per liter.
Claim 3
Dependent Claim
71 words
The process for the preparation of an essentially anhydrous magnesium chloride support of claim 1, wherein the improvement comprises contacting the hydrocarbon solution of a magnesium salt of an aliphatic carboxylic acid with the hydrocarbon solution of said alkylaluminum dichloride in a liquid hydrocarbon reaction medium containing from about 0.15 to about 0.4 mole alkylaluminum dichloride per liter and from about 0.15 to about 0.7 mole alkylaluminum alkanoate chloride per liter.
Claim 4
Dependent Claim
130 words
An essentially anhydrous magnesium chloride support composition for use in the polymerization of 1-olefins, obtained by the process comprising (1) precipitating the product formed by contacting a hydrocarbon solution of a magnesium alkanoate with a hydrocarbon solution of an alkylaluminum dichloride, (2) isolating the precipitation product from the hydrocarbon precipitation medium, (3) successively washing the precipitation product with a hydrocarbon solvent, (4) contacting the washed precipitation product with an electron donor, (5) washing the donor-treated precipitation product with a hydrocarbon solvent, and (6) contacting the hydrocarbon solution of said magnesium alkanoate with the hydrocarbon solution of said alkylaluminum dichloride in a liquid hydrocarbon reaction medium containing from about 0.05 to about 0.6 mole alkylaluminum dichloride per liter and from about 0.05 to about 0.8 mole alkylaluminum alkanoate chloride per liter.
Claim 5
Dependent Claim
130 words
An essentially anhydrous magnesium chloride support composition for use in the polymerization of 1-olefins, obtained by the process comprising (1) precipitating the product formed by contacting a hydrocarbon solution of a magnesium alkanoate with a hydrocarbon solution of an alkylaluminum dichloride, (2) isolating the precipitation product from the hydrocarbon precipitation medium, (3) successively washing the precipitation product with a hydrocarbon solvent, (4) contacting the washed precipitation product with an electron donor, (5) washing the donor-treated precipitation product with a hydrocarbon solvent, and (6) contacting the hydrocarbon solution of said magnesium alkanoate with the hydrocarbon solution of said alkylaluminum dichloride in a liquid hydrocarbon reaction medium containing from about 0.05 to about 0.6 mole alkylaluminum dichloride per liter and from about 0.05 to about 0.8 mole alkylaluminum alkanoate chloride per liter.
Claim 6
Dependent Claim
40 words
The essentially anhydrous magnesium chloride support of claim 3, wherein the liquid hydrocarbon reaction medium contains from about 0.15 to about 0.4 mole alkylaluminum dichloride per liter and from about 0.15 to about 0.7 mole alkylaluminum alkanoate chloride per liter.
Claim 7
Dependent Claim
116 words
In a process for the polymerization of a 1-olefin by Ziegler-Natta catalysis, the improvement wherein the transition metal component comprises a titanium halide deposited on an essentially anhydrous magnesium chloride support prepared by precipitating the product formed by contacting in a liquid hydrocarbon reaction medium containing alkylaluminum dichloride at about 0.05-0.6 mole per liter and alkylaluminum alkanoate chloride at about 0.05-0.8 mole per liter a hydrocarbon solution of a magnesium alkanoate with a hydrocarbon solution of an alkylaluminum dichloride, isolating the precipitation product from the precipitation medium, successively washing the precipitation product with a hydrocarbon solvent, contacting the wash precipitation product with an electron donor, and washing the electron donor-tested precipitation product with a hydrocarbon solvent.
Claim 8
Dependent Claim
116 words
In a process for the polymerization of a 1-olefin by Ziegler-Natta catalysis, the improvement wherein the transition metal component comprises a titanium halide deposited on an essentially anhydrous magnesium chloride support prepared by precipitating the product formed by contacting in a liquid hydrocarbon reaction medium containing alkylaluminum dichloride at about 0.05-0.6 mole per liter and alkylaluminum alkanoate chloride at about 0.05-0.8 mole per liter a hydrocarbon solution of a magnesium alkanoate with a hydrocarbon solution of an alkylaluminum dichloride, isolating the precipitation product from the precipitation medium, successively washing the precipitation product with a hydrocarbon solvent, contacting the wash precipitation product with an electron donor, and washing the electron donor-tested precipitation product with a hydrocarbon solvent.
Claim 9
Dependent Claim
11 words
The process according to claim 5 wherein said 1-olefin is propylene.
Claim 10
Dependent Claim
112 words
An improved transition metal component for use in the Ziegler-Natta catalysis of 1-olefin polymerization, which comprises a titanium halide deposited on an essentially anhydrous magnesium chloride support prepared by precipitating the product formed by contacting in a liquid hydrocarbon reaction medium containing alkylaluminum dichloride at about 0.05-0.6 mole per liter and alkylaluminum alkanoate chloride at about 0.05-0.8 mole per liter a hydrocarbon solution of a magnesium alkanoate with a hydrocarbon solution of an alkylaluminum dichloride, isolating the precipitation product from the precipitation medium, successively washing the precipitation product with a hydrocarbon solvent, contacting the wash precipitation product with an electron donor, and washing the electron donor-treated precipitation product with a hydrocarbon solvent.
Claim 11
Dependent Claim
112 words
An improved transition metal component for use in the Ziegler-Natta catalysis of 1-olefin polymerization, which comprises a titanium halide deposited on an essentially anhydrous magnesium chloride support prepared by precipitating the product formed by contacting in a liquid hydrocarbon reaction medium containing alkylaluminum dichloride at about 0.05-0.6 mole per liter and alkylaluminum alkanoate chloride at about 0.05-0.8 mole per liter a hydrocarbon solution of a magnesium alkanoate with a hydrocarbon solution of an alkylaluminum dichloride, isolating the precipitation product from the precipitation medium, successively washing the precipitation product with a hydrocarbon solvent, contacting the wash precipitation product with an electron donor, and washing the electron donor-treated precipitation product with a hydrocarbon solvent.
Claim 12
Dependent Claim
16 words
A transition metal component according to claim 7 in which said titanium halide is titanium tetrachloride.
Claim 13
Dependent Claim
26 words
A transition metal component according to claim 8 in which the magnesium to titanium mole ratio is in the range from about 200:1 to about 1:1.
Claim 14
Dependent Claim
23 words
A transition metal component according to claim 9 in which said mole ratio is in the range from about 80:1 to about 5:1.
References Cited (Backward Citations)
US4277372A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-29 | 1989-01-28 | 1989-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-29 | 1993-01-28 | 1993-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-29 | 1997-01-28 | 1997-07-30 | $7700.00 | Window Closed / Lapsed |