US4489172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Activated chromium catalyst treated with tertiary alcohol
Assignee: Phillips Petroleum Co
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Filing: 1983-06-03
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Granted: 1984-12-18
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Expires: 2003-06-03
Abstract
Abstract A catalyst is produced by contacting an already activated silica-titania supported chromium composition with a tertiary alcohol and thereafter reactivating under relatively mild conditions. Such contacting is conveniently carried out by forming a slurry of the catalyst in an inert diluent containing a small amount of the alcohol.
Inventors
- 👤 Max P. McDaniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:42
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/26; B01J37/00
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
41 words
A process for producing a catalyst comprising: contacting an activated silica-titania supported chromium catalyst precursor with a tertiary alcohol; and reactivating the resulting treated catalyst in an oxygen-containing ambient at a temperature within the range of 200° C. to 600° C.
Claim 2
Dependent Claim
41 words
A process for producing a catalyst comprising: contacting an activated silica-titania supported chromium catalyst precursor with a tertiary alcohol; and reactivating the resulting treated catalyst in an oxygen-containing ambient at a temperature within the range of 200° C. to 600° C.
Claim 3
Dependent Claim
25 words
A method according to claim 1 wherein said activated silica-titania supported catalyst precursor is produced by calcining in air at 500° C. to 900° C.
Claim 4
Dependent Claim
18 words
A method according to claim 2 wherein said calcining is carried out at 600° C. to 800° C.
Claim 5
Dependent Claim
30 words
A method according to claim 1 wherein the support of said silica-titania supported catalyst precursor has from 0.1 to 10 weight percent titanium based on the weight of said support.
Claim 6
Dependent Claim
30 words
A method according to claim 4 wherein said titanium is present in an amount within the range of 1to 6 weight percent titanium based on the weight of said support.
Claim 7
Dependent Claim
19 words
A method according to claim 1 wherein the support of said silica-titania supported catalyst precursor is a silica-titania cogel.
Claim 8
Dependent Claim
26 words
A method according to claim 1 wherein the support of said silica-titania supported catalyst precursor is produced by impregnation of silica gel with a titanium compound.
Claim 9
Dependent Claim
15 words
A method according to claim 7 wherein said impregnation is carried out under aqueous conditions.
Claim 10
Dependent Claim
13 words
A method according to claim 7 wherein said impregnation is carried out anhydrously.
Claim 11
Dependent Claim
14 words
A method according to claim 1 wherein said reactivating is carried out in air.
Claim 12
Dependent Claim
33 words
A method according to claim 10 wherein said reactivating is carried out at a temperature of 300° C. to 400° C. for a time within the range of 15 minutes to 5 hours.
Claim 13
Dependent Claim
24 words
A method according to claim 1 wherein said tertiary alcohol is one of tertiary butanol, tertiary amyl alcohol, 2-methyl-2-pentanol, 3-ethyl-3-pentanol, 2,2,4-trimethyl-4-pentanol and mixtures thereof.
Claim 14
Dependent Claim
12 words
A method according to claim 12 wherein said tertiary alcohol is tertiary-butanol.
Claim 15
Dependent Claim
24 words
A method according to claim 1 wherein said contacting is carried out for a time within the range of one minute to four hours.
Claim 16
Dependent Claim
19 words
A method according to claim 14 wherein said time is within the range of 30 minutes to 2 hours.
Claim 17
Dependent Claim
36 words
A method according to claim 15 wherein said tertiary alcohol is used in an amount within the range of one molecule of alcohol per atom of chromium to 10 molecules of alcohol per atom of chromium.
Claim 18
Dependent Claim
36 words
A method according to claim 1 wherein said tertiary alcohol is used in an amount within the range of 1 molecule of alcohol per atom of chromium to 10 molecules of alcohol per atom of chromium.
Claim 19
Dependent Claim
30 words
A method according to claim 1 wherein said contacting is done by forming a slurry of said silica-titania supported chromium catalyst precursor in an inert diluent containing said tertiary alcohol.
Claim 20
Dependent Claim
21 words
A method according to claim 18 wherein said diluent is a hydrocarbon containing from about 3 to about 12 carbon atoms.
Claim 21
Dependent Claim
13 words
A method according to claim 19 wherein said hydrocarbon is n-pentane or n-hexane.
Claim 22
Dependent Claim
37 words
A method according to claim 1 wherein said chromium is present in an amount within the range of 0.1 to 5 weight percent based on the weight of the support of said silica-titania supported chromium catalyst precursor.
Claim 23
Dependent Claim
37 words
A method according to claim 21 wherein said chromium is present in an amount within the range of 0.5 to 1.2 weight percent based on the weight of the support of said silica-titania supported chromium catalyst precursor.
Claim 24
Dependent Claim
162 words
A method according to claim 1 wherein said contacting is done by slurrying said silica-titania supported chromium catalyst precursor in an inert diluent containing said tertiary alcohol, said tertiary alcohol is present in an amount within the range of 1 molecule of alcohol per atom of chromium to 10 molecules of alcohol per atom of chromium, said contacting is carried out for a time of one minute to 4 hours; wherein said tertiary alcohol is selected from tertiary butanol, tertiary amyl alcohol, 2-methyl-2-pentanol, 3-ethyl-3-pentanol, 2,2,4-trimethyl-4-pentanol and mixtures thereof, wherein said reactivating is carried out at a temperature of 300° C. to 400° C. in air and said activated silica-titania supported chromium catalyst precursor is produced by calcination in air at a temperature of 600° C. to 800° C. and wherein titanium is present in the support of said silica-titania supported chromium catalyst precursor in an amount within the range of 0.5 to 5 weight percent based on the weight of said support.
Claim 25
Dependent Claim
9 words
A catalyst produced by the method of claim 23.
Claim 26
Dependent Claim
9 words
A catalyst produced by the method of claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-18 | 1988-06-18 | 1988-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-18 | 1992-06-18 | 1992-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-18 | 1996-06-18 | 1996-12-18 | $7700.00 | Window Closed / Lapsed |