US4041224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst, method and polymerization processes
Assignee: Enron Chemical Co
•
Filing: 1975-11-19
•
Granted: 1977-08-09
•
Expires: 1995-11-19
Abstract
Abstract A catalyst prepared by (1) forming a mixture of a finely divided support such as silica, alumina, zirconia or thoria and a chromium compound which may be either organic or inorganic followed by (2) adding a titanium compound, then (3) heat activating the reaction product of (2), and then (4) further heating in a gas that comprises oxygen. The disclosure also includes a method of polymerizing olefins with this catalyst and the process of preparing the catalyst.
Inventors
- 👤 Raymond E. Hoff
- 👤 Thomas J. Pullukat
- 👤 Mitsuzo Shida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:32
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
73 words
A catalyst prepared by the process of (1) forming a mixture of a finely divided, difficultly reducible, support selected from the group consisting of silica, alumina, zirconia, thoria and mixtures thereof and a chromium compound, followed by (2) adding a titanium compound, then (3) heat activating said product of (2) in an inert or reducing atmosphere, and then (4) partially oxidizing by heating said product of (3) in a gas that comprises oxygen.
Claim 2
Dependent Claim
73 words
A catalyst prepared by the process of (1) forming a mixture of a finely divided, difficultly reducible, support selected from the group consisting of silica, alumina, zirconia, thoria and mixtures thereof and a chromium compound, followed by (2) adding a titanium compound, then (3) heat activating said product of (2) in an inert or reducing atmosphere, and then (4) partially oxidizing by heating said product of (3) in a gas that comprises oxygen.
Claim 3
Dependent Claim
22 words
The catalyst of claim 1 wherein said chromium compound is an inorganic compound containing chromium, oxygen and volatile or thermally degradable substituents.
Claim 4
Dependent Claim
11 words
The catalyst of claim 1 wherein said chromium compound is organic.
Claim 5
Dependent Claim
19 words
The catalyst of claim 1 wherein said heat activating of (3) is at a temperature of about 300°-900° C.
Claim 6
Dependent Claim
22 words
The catalyst of claim 4 wherein said heat activating of (3) is concurrent with fluidizing said mixture in a non-oxidizing gas stream.
Claim 7
Dependent Claim
14 words
The catalyst of claim 5 wherein said fluidizing is in a reducing gas stream.
Claim 8
Dependent Claim
17 words
The catalyst of claim 6 wherein said reducing gas comprises a mixture of nitrogen and carbon monoxide.
Claim 9
Dependent Claim
23 words
The catalyst of claim 1 wherein said heat activating of (3) and heating of (4) are each accomplished while fluidizing the respective mixtures.
Claim 10
Dependent Claim
10 words
The catalyst of claim 1 wherein said gas comprises air.
Claim 11
Dependent Claim
25 words
The catalyst of claim 1 wherein the product of (2) is dried at from about 200°-400° F. for from about 15 minutes to 2 hours.
Claim 12
Dependent Claim
43 words
The catalyst of claim 1 wherein said chromium compound is present in an amount to produce about 0.1-10 wt.% chromium and said titanium compound is present in an amount to produce about 0.5-8.0 wt.% titanium, both based on the amount of said support.
Claim 13
Dependent Claim
22 words
The catalyst of claim 1 wherein said heating of (4) is at about 450°-550° C. for about 5 minutes - 2 hours.
Claim 14
Dependent Claim
36 words
The method of making polymers of 1-olefins of 2-8 carbon atoms and copolymers of said olefins and 1-olefins of 2-20 carbon atoms which comprises polymerizing said olefins under polymerizing conditions with the catalyst of claim 1.
Claim 15
Dependent Claim
36 words
The method of making polymers of 1-olefins of 2-8 carbon atoms and copolymers of said olefins and 1-olefins of 2-20 carbon atoms which comprises polymerizing said olefins under polymerizing conditions with the catalyst of claim 2.
Claim 16
Dependent Claim
36 words
The method of making polymers of 1-olefins of 2-8 carbon atoms and copolymers of said olefins and 1-olefins of 2-20 carbon atoms which comprises polymerizing said olefins under polymerizing conditions with the catalyst of claim 3.
Claim 17
Dependent Claim
36 words
The method of making polymers of 1-olefins of 2-8 carbon atoms and copolymers of said olefins and 1-olefins of 2-20 carbon atoms which comprises polymerizing said olefins under polymerizing conditions with the catalyst of claim 4.
Claim 18
Dependent Claim
36 words
The method of making polymers of 1-olefins of 2-8 carbon atoms and copolymers of said olefins and 1-olefins of 2-20 carbon atoms which comprises polymerizing said olefins under polymerizing conditions with the catalyst of claim 5.
Claim 19
Dependent Claim
36 words
The method of making polymers of 1-olefins of 2-8 carbon atoms and copolymers of said olefins and 1-olefins of 2-20 carbon atoms which comprises polymerizing said olefins under polymerizing conditions with the catalyst of claim 6.
Claim 20
Dependent Claim
36 words
The method of making polymers of 1-olefins of 2-8 carbon atoms and copolymers of said olefins and 1-olefins of 2-20 carbon atoms which comprises polymerizing said olefins under polymerizing conditions with the catalyst of claim 7.
Claim 21
Dependent Claim
36 words
The method of making polymers of 1-olefins of 2-8 carbon atoms and copolymers of said olefins and 1-olefins of 2-20 carbon atoms which comprises polymerizing said olefins under polymerizing conditions with the catalyst of claim 8.
Claim 22
Dependent Claim
36 words
The method of making polymers of 1-olefins of 2-8 carbon atoms and copolymers of said olefins and 1-olefins of 2-20 carbon atoms which comprises polymerizing said olefins under polymerizing conditions with the catalyst of claim 9.
Claim 23
Dependent Claim
36 words
The method of making polymers of 1-olefins of 2-8 carbon atoms and copolymers of said olefins and 1-olefins of 2-20 carbon atoms which comprises polymerizing said olefins under polymerizing conditions with the catalyst of claim 10.
Claim 24
Dependent Claim
36 words
The method of making polymers of 1-olefins of 2-8 carbon atoms and copolymers of said olefins and 1-olefins of 2-20 carbon atoms which comprises polymerizing said olefins under polymerizing conditions with the catalyst of claim 11.
Claim 25
Dependent Claim
36 words
The method of making polymers of 1-olefins of 2-8 carbon atoms and copolymers of said olefins and 1-olefins of 2-20 carbon atoms which comprises polymerizing said olefins under polymerizing conditions with the catalyst of claim 12.
Claim 26
Dependent Claim
68 words
The process of preparing an active polymerizing catalyst, comprising: (1) forming a mixture of a finely divided, difficultly reducible, support selected from the group consisting of silica, alumina, zirconia, thoria and mixtures thereof and a chromium compound, followed by (2) adding a titanium compound, then (3) heat activating said product of (2) in an inert or reducing atmosphere, and then (4) heating in a gas that comprises oxygen.
Claim 27
Dependent Claim
68 words
The process of preparing an active polymerizing catalyst, comprising: (1) forming a mixture of a finely divided, difficultly reducible, support selected from the group consisting of silica, alumina, zirconia, thoria and mixtures thereof and a chromium compound, followed by (2) adding a titanium compound, then (3) heat activating said product of (2) in an inert or reducing atmosphere, and then (4) heating in a gas that comprises oxygen.
Claim 28
Dependent Claim
22 words
The process of claim 25 wherein said chromium compound is an inorganic compound containing chromium, oxygen and volatile or thermally degradable substituents.
Claim 29
Dependent Claim
11 words
The process of claim 25 wherein said chromium compound is organic.
Claim 30
Dependent Claim
19 words
The process of claim 25 wherein said heat activating of (3) is at a temperature of about 300°-900° C.
Claim 31
Dependent Claim
21 words
The process of claim 28 wherein said heat activating of (3) is concurrent with fluidizing said mixture in a gas stream.
Claim 32
Dependent Claim
14 words
The process of claim 29 wherein said fluidizing is in a reducing gas stream.
Claim 33
Dependent Claim
17 words
The process of claim 30 wherein said reducing gas comprises a mixture of nitrogen and carbon monoxide.
Claim 34
Dependent Claim
22 words
The process of claim 25 wherein said heat activating of (3) and heating of (4) are accomplished while fluidizing the respective mixtures.
Claim 35
Dependent Claim
10 words
The process of claim 25 wherein said gas comprises air.
Claim 36
Dependent Claim
25 words
The process of claim 25 wherein the product of (2) is dried at from about 200°-400° F. for from about 15 minutes - 2 hours.
Claim 37
Dependent Claim
43 words
The process of claim 25 wherein said chromium compound is present in an amount to produce about 0.1-10 wt.% chromium and said titanium compound is present in an amount to produce about 0.5-8.0 wt.% titanium, both based on the amount of said support.
Claim 38
Dependent Claim
22 words
The process of claim 25 wherein said heating of (4) is at about 450°-550° C. for about 5 minutes - 2 hours.
References Cited (Backward Citations)
US2825721A
Cited
US3485771A
Cited
US3622521A
Cited
US3625864A
Cited
US3780011A
Cited
US3798202A
Cited
US3879362A
Cited
US3882096A
Cited
US3970613A
Cited
US3976632A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |