US4680350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purified catalyst support
Assignee: Akzo America Inc
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Filing: 1983-01-31
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Granted: 1987-07-14
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Expires: 2003-01-31
Abstract
Abstract This invention relates to pretreating the support material for a polymerization catalyst comprising magnesium chloride with an active hydrogen compound such as an organic acid phosphate or a phenol in order to transform substantially elemental magnesium and other impurities. The impure magnesium chloride originates as a by-product from the manufacture of magnesium alkyls by the reaction of alkyl chlorides with elemental magnesium. Succeeding steps are activating the support material with an electron donor and treating the activated product with a titanium halide. The invention also includes the novel catalytic component containing titanium halide, itself, the process for making that component, use of this catalytic system for polymerizing olefins such as propylene, and the purification step for magnesium chloride, itself.
Inventors
- 👤 Carl C. Greco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:10
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/906
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
105 words
A process for polymerizing olefins employing a catalytic system comprising: (a) a component containing titanium chloride obtained by: (i) activating a support material consisting essentially of a magnesium chloride by-product derived from the reaction of a haloalkyl with magnesium metal, with an electron donor to make an activated product, and (ii) treating the activated product with a titanium halide component, and (b) a compound containing an organoaluminum compound, wherein said support material, which contains about 5 percent or more magnesium metal, is pretreated with an active hydrogen compound in order to transform substantially the elemental magnesium to the magnesium salt of the active hydrogen compound.
Claim 2
Dependent Claim
105 words
A process for polymerizing olefins employing a catalytic system comprising: (a) a component containing titanium chloride obtained by: (i) activating a support material consisting essentially of a magnesium chloride by-product derived from the reaction of a haloalkyl with magnesium metal, with an electron donor to make an activated product, and (ii) treating the activated product with a titanium halide component, and (b) a compound containing an organoaluminum compound, wherein said support material, which contains about 5 percent or more magnesium metal, is pretreated with an active hydrogen compound in order to transform substantially the elemental magnesium to the magnesium salt of the active hydrogen compound.
Claim 3
Dependent Claim
26 words
The process of claim 1 wherein the original amount of elemental magnesium is from about 5 to about 15 percent by weight of the magnesium chloride.
Claim 4
Dependent Claim
15 words
The process of claim 1 wherein the active hydrogen compound is an organic acid phosphate.
Claim 5
Dependent Claim
13 words
The process of claim 1 wherein the active hydrogen compound is a phenol.
Claim 6
Dependent Claim
19 words
The process of claim 1 wherein the active hydrogen compound has a pKa from about 2 to about 10.
Claim 7
Dependent Claim
13 words
The process of claim 1 wherein the activation is carried out by copulverization.
Claim 8
Dependent Claim
11 words
The process of claim 6 wherein the copulverization is ball milling.
Claim 9
Dependent Claim
20 words
The process of claim 1 wherein the electron donor is a complex of a carboxylic ester and a titanium halide.
Claim 10
Dependent Claim
13 words
The process of claim 8 wherein the complex is ethyl benzoate.TiCl 4 .
Claim 11
Dependent Claim
12 words
The process of claim 1 wherein the titanium halide is titanium tetrachloride.
Claim 12
Dependent Claim
13 words
The process of claim 1 wherein the titanium halide is titanium trichloride material.
Claim 13
Dependent Claim
20 words
The process of claim 1 wherein the activated product comprises about one percent by weight of elemental magnesium or less.
Claim 14
Dependent Claim
97 words
A process for polymerizing olefins employing a component containing titanium halide comprising: (i) activating a support material consisting essentially of a magnesium chloride by-product derived from the reaction of a haloalkyl with a magnesium metal, with an electron donor to make an activated product, and (ii) treating the activated product with a titanium halide to form the titanium halide component, wherein said support material, which contains about 5 percent or more magnesium metal, is pretreated with an active hydrogen compound in order to transform substantially the elemental magnesium to the magnesium salt of the active hydrogen compound.
Claim 15
Dependent Claim
97 words
A process for polymerizing olefins employing a component containing titanium halide comprising: (i) activating a support material consisting essentially of a magnesium chloride by-product derived from the reaction of a haloalkyl with a magnesium metal, with an electron donor to make an activated product, and (ii) treating the activated product with a titanium halide to form the titanium halide component, wherein said support material, which contains about 5 percent or more magnesium metal, is pretreated with an active hydrogen compound in order to transform substantially the elemental magnesium to the magnesium salt of the active hydrogen compound.
Claim 16
Dependent Claim
26 words
The process of claim 13 wherein the original amount of elemental magnesium is from about 5 to about 15 percent by weight of the magnesium chloride.
Claim 17
Dependent Claim
15 words
The process of claim 13 wherein the active hydrogen compound is an organic acid phosphate.
Claim 18
Dependent Claim
12 words
The process of claim 13 wherein the active hydrogen compound is phenol.
Claim 19
Dependent Claim
19 words
The process of claim 13 wherein the active hydrogen compound has a pKa from about 2 to about 10.
Claim 20
Dependent Claim
13 words
The process of claim 13 wherein the activation is carried out by copulverization.
Claim 21
Dependent Claim
11 words
The process of claim 18 wherein the copulverization is ball milling.
Claim 22
Dependent Claim
20 words
The process of claim 13 wherein the electron donor is a complex of a carboxylic ester and a titanium halide.
Claim 23
Dependent Claim
13 words
The process of claim 20 wherein the complex is ethyl benzoate.TiCl 4 .
Claim 24
Dependent Claim
12 words
The process of claim 13 wherein the titanium halide is titanium tetrachloride.
Claim 25
Dependent Claim
13 words
The process of claim 13 wherein the titanium halide is titanium trichloride material.
Claim 26
Dependent Claim
20 words
The process of claim 13 wherein the activated product comprises about one percent by weight of elemental magnesium or less.
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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) | 1990-07-13 | 1991-01-12 | 1991-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-13 | 1995-01-12 | 1995-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-13 | 1999-01-12 | 1999-07-14 | $7700.00 | Window Closed / Lapsed |