Patent US4052334A successfully refreshed from Google Patents.
US4052334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst support
Assignee: BP Chemicals Ltd
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Filing: 1976-06-01
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Granted: 1977-10-04
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Expires: 1996-06-01
Abstract
Abstract A pelleted support for catalysts suitable for use in olefin hydration to alcohols is prepared by heating to cure a shaped article formed by extrusion of a mixture of finely divided silica and colloidal silica containing 5-40% by weight of water. The presence of the specified amount of water prevents the extruded article from disintegrating on heating at elevated temperature.
Inventors
- 👤 Keith Henry George Mockett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:52
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/06; B01J21/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
61 words
A process for producing a pelleted silica support for catalysts comprising heating to cure a shaped article, formed from a mixture of an ionic detergent, finely divided silica powder and colloidal silica and containing water in the range of 5 to 40% by weight of the total mixture sufficient to prevent the shaped article from disintegrating on heating at elevated temperature.
Claim 2
Dependent Claim
61 words
A process for producing a pelleted silica support for catalysts comprising heating to cure a shaped article, formed from a mixture of an ionic detergent, finely divided silica powder and colloidal silica and containing water in the range of 5 to 40% by weight of the total mixture sufficient to prevent the shaped article from disintegrating on heating at elevated temperature.
Claim 3
Dependent Claim
43 words
A process according to claim 1 wherein the finely divided silica powder has an average particle size in the range of 0.5 to 100 microns and the colloidal silica has an average particle size in the range of about 2 to 100 millimicrons.
Claim 4
Dependent Claim
24 words
A process according to claim 1 wherein the ratio of silica powder to the colloidal silica is in the range of 0.5:1 to 4:1.
Claim 5
Dependent Claim
23 words
A process according to claim 1 wherein the shaped article is formed from the mixture of silica powder and colloidal silica by extrusion.
Claim 6
Dependent Claim
22 words
A process according to claim 4 wherein the mixture of silica powder and colloidal silica contains in addition an inorganic fluoride compound.
Claim 7
Dependent Claim
13 words
A process according to claim 5 wherein the fluoride compound is ammonium silicofluoride.
Claim 8
Dependent Claim
24 words
A process according to claim 1 wherein prior to heating to cure the shaped article contains between 11 and 20% by weight of water.
Claim 9
Dependent Claim
25 words
A process according to claim 1 wherein the shaped article is heated to cure at a temperature in the range of 300° to 900° C.
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) | 1980-10-03 | 1981-04-04 | 1981-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-03 | 1985-04-04 | 1985-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-03 | 1989-04-04 | 1989-10-04 | $7700.00 | Window Closed / Lapsed |