Patent US4324693A successfully refreshed from Google Patents.
US4324693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Olefin polymerization catalyst
Assignee: BP Corp North America Inc
•
Filing: 1980-10-10
•
Granted: 1982-04-13
•
Expires: 2000-10-10
Abstract
Abstract In a method to produce an alpha-olefin polymerization catalyst comprising reducing titanium tetrachloride with an aluminum alkyl, contacting the resulting reduced solid with a pretreatment amount of alpha-olefin monomer under polymerization conditions and reacting the resulting product with a Lewis base complexing agent and additional titanium tetrachloride, the improvement comprising reacting the Lewis base complexing agent in a molar ratio to the reduced titanium compound of greater than 1.15 to 1.
Inventors
- 👤 Gregory G. Arzoumanidis
- 👤 Sam S. Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:22
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
71 words
In a method to produce an alpha-olefin polymerization catalyst comprising reducing titanium tetrachloride with an aluminum alkyl, contacting the resulting reduced solid with a pretreatment amount of alpha-olefin monomer under polymerization conditions, and reacting the resulting product with an ether complexing agent and additional titanium tetrachloride, the improvement comprising reacting a mixture of di-n-butyl and diisoamylethers in a molar ratio to the reduced titanium compound of greater than 1.15 to 1.
Claim 2
Dependent Claim
71 words
In a method to produce an alpha-olefin polymerization catalyst comprising reducing titanium tetrachloride with an aluminum alkyl, contacting the resulting reduced solid with a pretreatment amount of alpha-olefin monomer under polymerization conditions, and reacting the resulting product with an ether complexing agent and additional titanium tetrachloride, the improvement comprising reacting a mixture of di-n-butyl and diisoamylethers in a molar ratio to the reduced titanium compound of greater than 1.15 to 1.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein the molar ratio of ethers to titanium compound is less than about 1.5 to 1.
Claim 4
Dependent Claim
25 words
The method of claim 2 wherein the molar ratio of ethers to titanium compound is between about 1.25 to 1 and about 1.35 to 1.
Claim 5
Dependent Claim
17 words
The method of claim 1 wherein the olefin monomer is propylene, butene-1, pentene-1, hexene-1, heptene-1 or 4-methylpentene-1.
Claim 6
Dependent Claim
11 words
The method of claim 2 wherein the olefin monomer is propylene.
Claim 7
Dependent Claim
24 words
The method of claim 1 wherein the molar ratio of di-n-butylether to diisoamylether is between about 1 to 3 to about 3 to 1.
Claim 8
Dependent Claim
92 words
In a method to produce an olefin polymerization catalyst comprising reducing titanium tetrachloride with an aluminum alkyl, contacting the resulting reduced solid with a pretreatment amount of olefin monomer under polymerization conditions, and reacting the resulting product with a Lewis base complexing agent and additional titanium tetrachloride, the improvement comprising reacting a mixture of di-n-butyl and diisoamylethers in a molar ratio of ethers to reduced titanium compound greater than 1.15 to 1 and less than about 1.5 to 1 and maintaining an average particle size between about 20 to about 45 microns.
Claim 9
Dependent Claim
92 words
In a method to produce an olefin polymerization catalyst comprising reducing titanium tetrachloride with an aluminum alkyl, contacting the resulting reduced solid with a pretreatment amount of olefin monomer under polymerization conditions, and reacting the resulting product with a Lewis base complexing agent and additional titanium tetrachloride, the improvement comprising reacting a mixture of di-n-butyl and diisoamylethers in a molar ratio of ethers to reduced titanium compound greater than 1.15 to 1 and less than about 1.5 to 1 and maintaining an average particle size between about 20 to about 45 microns.
Claim 10
Dependent Claim
17 words
The method of claim 7 wherein the olefin monomer is propylene, butene-1, pentene-1, hexene-1, heptene-1 or 4-methylpentene-1.
Claim 11
Dependent Claim
24 words
The method of claim 8 wherein the molar ratio of di-n-butylether to diisoamylether is between about 1 to 3 to about 3 to 1.
Claim 12
Dependent Claim
25 words
The method of claim 8 wherein the molar ratio of ethers to titanium compound is between about 1.25 to 1 and about 1.35 to 1.
Claim 13
Dependent Claim
18 words
The method of claim 10 wherein the average particle size is between about 20 to about 45 microns.
Claim 14
Dependent Claim
18 words
The method of claim 11 wherein the average particle size is between about 30 to about 35 microns.
Claim 15
Dependent Claim
18 words
The method of claim 12 wherein the molar ratio of di-n-butylether to diisoamylether is about 1 to 2.
Claim 16
Dependent Claim
11 words
The method of claim 2 wherein the olefin monomer is butene-1.
Claim 17
Dependent Claim
11 words
The method of claim 7 wherein the olefin monomer is propylene.
Claim 18
Dependent Claim
11 words
The method of claim 7 wherein the olefin monomer is butene-1.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-04-12 | 1985-10-12 | 1986-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-12 | 1989-10-12 | 1990-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-12 | 1993-10-12 | 1994-04-13 | $7700.00 | Window Closed / Lapsed |