US4547283A
Expired / Lapsed
US
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Process for the hydroisomerization of petroleum waxes
Assignee: Shell USA Inc
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Filing: 1984-08-30
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Granted: 1985-10-15
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Expires: 2004-08-30
Abstract
Abstract Process for the hydroisomerization of petroleum waxes by contacting said waxes with hydrogen at hydroisomerization conditions using a catalyst comprising at least one hydrogenating metal or compound thereof present on at least one refractory oxide which has been treated with from 0.1 to 30% w, calculated on refractory oxide, of at least one reactive metal compound of Group 2a, 3a, 4a and/or 4b of the Periodic Table of the Elements.
Inventors
- 👤 Emmanuel E. A. Neel
- 👤 Jacques A. Levavasseur
- 👤 Jacques P. Lucien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:05
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/02; B01J37/0201; B01J37/0203; C; C10; C10G; C10G45/00; C10G45/44; C10G45/46; C10G45/58; C10G45/60
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
188 words
A process for the hydroisomerization of petroleum waxes, wherein said waxes are contacted with hydrogen at isomerization conditions using a catalyst comprising at least one refractory oxide consisting of modified silica, wherein said silica has been treated with from 0.1 to 30 wt%, calculated on refractory oxide, of at least one reactive metal compound of Group 2a, 3a, 4a and 4b of the Periodic Table of Elements, wherein said silica is modified by (1) impregnating said silica with: i. a solution of a hydrocarbyl ammonium metallate; or ii. two solutions, wherein the first of said two solutions contains a hydrocarbyl ammonium hydroxide and the second of said two solutions contains said at least one reactive metal moiety or moieties selected from the group consisting of a moiety or moieties of said elements of Group 2a, 3a, 4a and 4b of the Periodic Table of Elements, and after said impregnation; (2) drying said modified silica at a temperature of from 50°-250° C.; (3) calcining said dried modified silica at a temperature of from 250°-1000° C; and (4) recovering the resultant modified silica for said hydroisomerization of said petroleum waxes.
Claim 2
Dependent Claim
188 words
A process for the hydroisomerization of petroleum waxes, wherein said waxes are contacted with hydrogen at isomerization conditions using a catalyst comprising at least one refractory oxide consisting of modified silica, wherein said silica has been treated with from 0.1 to 30 wt%, calculated on refractory oxide, of at least one reactive metal compound of Group 2a, 3a, 4a and 4b of the Periodic Table of Elements, wherein said silica is modified by (1) impregnating said silica with: i. a solution of a hydrocarbyl ammonium metallate; or ii. two solutions, wherein the first of said two solutions contains a hydrocarbyl ammonium hydroxide and the second of said two solutions contains said at least one reactive metal moiety or moieties selected from the group consisting of a moiety or moieties of said elements of Group 2a, 3a, 4a and 4b of the Periodic Table of Elements, and after said impregnation; (2) drying said modified silica at a temperature of from 50°-250° C.; (3) calcining said dried modified silica at a temperature of from 250°-1000° C; and (4) recovering the resultant modified silica for said hydroisomerization of said petroleum waxes.
Claim 3
Dependent Claim
31 words
The process according to claim 1 wherein said silica has a pore volume of at least 0.5 ml/g and a specific surface area of from 100 to 600 m 2 /g.
Claim 4
Dependent Claim
18 words
The process according to claim 1, wherein said silica has a size of from 0.1 to 30 mm.
Claim 5
Dependent Claim
18 words
The process according to claim 3, wherein said silica has a diameter of from 0.5 to 10 mm.
Claim 6
Dependent Claim
16 words
The process according to claim 3, wherein said silica is present as substantially spherical catalyst particles.
Claim 7
Dependent Claim
27 words
The process according to claim 1, wherein said silica contains from 0.1 to 10%w of said reactive metal(s), calculated as metal oxides and based on refractory oxide.
Claim 8
Dependent Claim
26 words
The process according to claim 6, wherein said silica is treated with reactive metal moieties selected from the group consisting of magnesium, aluminum, titanium and zirconium.
Claim 9
Dependent Claim
33 words
The process according to claim 6, wherein said silica is impregnated with a solution comprising the nitrate(s) of one or more of the reactive metal(s) and a solution comprising said hydrocarbyl ammonium hydroxide.
Claim 10
Dependent Claim
25 words
The process according to claim 8, wherein said hydrocarbyl ammonium hydroxide has a weight ratio of from 1 to 100 with respect to said silica.
Claim 11
Dependent Claim
18 words
The process according to claim 1, wherein said silica is impregnated with a solution of tetramethyl ammonium aluminate.
Claim 12
Dependent Claim
32 words
The process according to claim 1, wherein said silica is loaded with one or more hydrogenating metals of Groups 6b and 8 of the Periodic Table of the Elements or compounds thereof.
Claim 13
Dependent Claim
34 words
The process according to claim 11, wherein said silica is loaded with from 0.1 to 2%w of one or more noble metals of Group 8, calculated on the weight of the treated refractory oxides.
Claim 14
Dependent Claim
64 words
The process according to claim 1 wherein said hydroisomerization is carried out at a temperature in the range of from 250° to 450° C., a pressure in the range of from 10-250 bar, a space velocity in the range of from 0.1 to 5 kg feed/1 catalyst/hour and a hydrogen/feed ratio in the range of from 100 to 2500 N1 H 2 /kg feed.
Claim 15
Dependent Claim
21 words
The process according to claim 1 wherein said impregnating is carried out at temperatures of from 60°-90° C. using aqueous solutions.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1988-10-14 | 1989-04-15 | 1989-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-14 | 1993-04-15 | 1993-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-14 | 1997-04-15 | 1997-10-15 | $7700.00 | Window Closed / Lapsed |