US4184979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst and process of preparing the catalyst
Assignee: Chemplex Co
•
Filing: 1978-07-17
•
Granted: 1980-01-22
•
Expires: 1998-07-17
Abstract
Abstract A catalyst for polymerizing one or more 1-olefins and prepared by the process of (1) forming an initial mixture of a finely divided support such as silica and a chromium+3 compound of either of the formulas <IMAGE> or Cr(OOCR)3 or a mixture in an amount to provide about 0.1-30 weight percent of chromium in the finished catalyst and in which each R is individually selected from hydrogen or a hydrocarbyl group of 1-20 carbon atoms and the necessary hydrogen atoms, followed by (2) heating the mixture of (1) in a stream of dry, inert, and non-oxidizing gas and heating to a temperature of about 230 DEG -540 DEG C., and then (3) forming a second combination by adding a titanium compound to the product of (2) at a temperature ranging from 95 DEG -370 DEG C., and then (4) activating the mixture of (3) by heating in a dry, oxidizing atmosphere such as dry air to a temperature of about 370 DEG -1100 DEG C. The disclosure also includes a method of preparing such a catalyst and the method of polymerizing at least one 1-olefin with said catalyst.
Inventors
- 👤 William Kirch
- 👤 Paul A. Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:48
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
220 words
A catalyst prepared by the process of (1) forming a mixture of a finely divided, difficultly reducible, support of the class consisting of silica, alumina, zirconia, thoria, magnesia and mixtures thereof and a chromium +3 derivative of a beta-dicarbonyl compound of the formula ##STR4## or a chromic carboxylate of the formula Cr (OOCR) 3 in an amount to provide about 0.1-30 weight percent of chromium in said catalyst, wherein each R is individually selected from hydrogen or a hydrocarbyl group of 1-20 carbon atoms, (2) heating the mixture of (1) in a stream of dry, inert, and non-oxidizing gas to a temperature of about 230°-540° C., and then (3) forming a second combination by adding a titanium compound to the product of (2) at a temperature ranging from 95°-370° C., said titanium compound having the formula (R') n Ti(OR') m or (R'O) m Ti(OR') n in which R' is the same or different and is hydrogen or a hydrocarbyl group of 1-12 carbon atoms and in which m is 1-4, n is 0-3 and m plus n equals 4 and being present in an amount to give about 0.5-10 weight percent of titanium in said catalyst, and then (4) activating the mixture of (3) by heating in a stream of dry, oxidizing gas to a temperature of about 370°-1100° C.
Claim 2
Dependent Claim
220 words
A catalyst prepared by the process of (1) forming a mixture of a finely divided, difficultly reducible, support of the class consisting of silica, alumina, zirconia, thoria, magnesia and mixtures thereof and a chromium +3 derivative of a beta-dicarbonyl compound of the formula ##STR4## or a chromic carboxylate of the formula Cr (OOCR) 3 in an amount to provide about 0.1-30 weight percent of chromium in said catalyst, wherein each R is individually selected from hydrogen or a hydrocarbyl group of 1-20 carbon atoms, (2) heating the mixture of (1) in a stream of dry, inert, and non-oxidizing gas to a temperature of about 230°-540° C., and then (3) forming a second combination by adding a titanium compound to the product of (2) at a temperature ranging from 95°-370° C., said titanium compound having the formula (R') n Ti(OR') m or (R'O) m Ti(OR') n in which R' is the same or different and is hydrogen or a hydrocarbyl group of 1-12 carbon atoms and in which m is 1-4, n is 0-3 and m plus n equals 4 and being present in an amount to give about 0.5-10 weight percent of titanium in said catalyst, and then (4) activating the mixture of (3) by heating in a stream of dry, oxidizing gas to a temperature of about 370°-1100° C.
Claim 3
Dependent Claim
11 words
The catalyst of claim 1 wherein said chromium compound is ##STR5##
Claim 4
Dependent Claim
14 words
The catalyst of claim 1 wherein said chromium compound is Cr (OOCR) 3 .
Claim 5
Dependent Claim
15 words
The catalyst of claim 1 wherein said titanium compound is (R') n Ti(OR') m .
Claim 6
Dependent Claim
15 words
The catalyst of claim 1 wherein said titanium compound is (R'O) m Ti(OR') n .
Claim 7
Dependent Claim
31 words
The catalyst of claim 1 wherein said dry, nonoxidizing gas stream comprises a substantially oxygen free inert gas of the class consisting of nitrogen, helium, argon, neon, krypton and mixtures thereof.
Claim 8
Dependent Claim
48 words
The catalyst of claim 1 wherein said dry, non-oxidizing gas stream comprises a reducing gas of the class consisting of hydrogen, carbon monoxide, and mixtures thereof with one or more substantially oxygen free inert gases of the class consisting of nitrogen, helium, argon, neon, krypton and mixtures thereof.
Claim 9
Dependent Claim
17 words
The catalyst of claim 7 wherein said reducing gas comprises a mixture of nitrogen and carbon monoxide.
Claim 10
Dependent Claim
16 words
The catalyst of claim 1 wherein said activation gas comprises dry oxygen or a nitrogen oxide.
Claim 11
Dependent Claim
21 words
The catalyst of claim 1 wherein said activation gas of (4) comprises dry air or other mixtures of oxygen and nitrogen.
Claim 12
Dependent Claim
216 words
The process of preparing an active polymerizing catalyst comprising: (1) forming a mixture of a finely divided, difficultly reducible, support of the class consisting of silica, alumina, zirconia, thoria, magnesia and mixtures thereof and a chromium +3 derivative of a beta-dicarbonyl compound of the formula ##STR6## or Cr (OOCR) 3 in an amount to provide about 0.1-30 weight percent of chromium in said catalyst, wherein each R is individually selected from hydrogen or a hydrocarbyl group of 1-20 carbon atoms, (2) heating the mixture of (1) in a stream of dry, inert, and non-oxidizing gas to a temperature of about 230°-540° C., and then (3) forming a second combination by adding a titanium compound to the product of (2) at a temperature ranging from 95°-370° C., said titanium compound having the formula (R') n Ti(OR') m or (R'O) m Ti(OR') n in which R' is the same or different and is hydrogen or a hydrocarbyl group of 1-12 carbon atoms and in which m is 1-4, n is 0-3 and m plus n equals 4 and being present in an amount to give about 0.5-10 weight percent of titanium in said catalyst, and then (4) activating the mixture of (3) by heating in a stream of dry, oxidizing gas to a temperature of about 370°-1100° C.
Claim 13
Dependent Claim
216 words
The process of preparing an active polymerizing catalyst comprising: (1) forming a mixture of a finely divided, difficultly reducible, support of the class consisting of silica, alumina, zirconia, thoria, magnesia and mixtures thereof and a chromium +3 derivative of a beta-dicarbonyl compound of the formula ##STR6## or Cr (OOCR) 3 in an amount to provide about 0.1-30 weight percent of chromium in said catalyst, wherein each R is individually selected from hydrogen or a hydrocarbyl group of 1-20 carbon atoms, (2) heating the mixture of (1) in a stream of dry, inert, and non-oxidizing gas to a temperature of about 230°-540° C., and then (3) forming a second combination by adding a titanium compound to the product of (2) at a temperature ranging from 95°-370° C., said titanium compound having the formula (R') n Ti(OR') m or (R'O) m Ti(OR') n in which R' is the same or different and is hydrogen or a hydrocarbyl group of 1-12 carbon atoms and in which m is 1-4, n is 0-3 and m plus n equals 4 and being present in an amount to give about 0.5-10 weight percent of titanium in said catalyst, and then (4) activating the mixture of (3) by heating in a stream of dry, oxidizing gas to a temperature of about 370°-1100° C.
Claim 14
Dependent Claim
11 words
The process of claim 11 wherein said chromium compound is ##STR7##
Claim 15
Dependent Claim
14 words
The process of claim 11 wherein said chromium compound is Cr (OOCR) 3 .
Claim 16
Dependent Claim
15 words
The process of claim 11 wherein said titanium compound is (R') n Ti(OR') m .
Claim 17
Dependent Claim
15 words
The process of claim 11 wherein said titanium compound is (R'O) m Ti(OR') n .
Claim 18
Dependent Claim
19 words
The process of claim 11 wherein said dry, inert, and non-oxidizing gas stream comprises a substantially oxygen free gas.
Claim 19
Dependent Claim
17 words
The process of claim 11 wherein said dry, inert, and non-oxidizing gas stream comprises a reducing gas.
Claim 20
Dependent Claim
17 words
The process of claim 17 wherein said reducing gas comprises a mixture of nitrogen and carbon monoxide.
Claim 21
Dependent Claim
12 words
The process of claim 11 wherein said activation gas is dry air.
References Cited (Backward Citations)
US3622521A
Cited
US3625864A
Cited
US3780011A
Cited
US3798202A
Cited
US3879362A
Cited
US3882096A
Cited
US3953413A
Cited
US3976632A
Cited
US4041224A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-01-21 | 1983-07-23 | 1984-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-21 | 1987-07-23 | 1988-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-21 | 1991-07-23 | 1992-01-22 | $7700.00 | Window Closed / Lapsed |