Patent US2901440A successfully refreshed from Google Patents.
US2901440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst for hydrocarbon conversion reactions
Assignee: WR Grace and Co
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Filing: 1956-03-23
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Granted: 1959-08-25
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Expires: 1976-03-23
Abstract
No abstract record available.
Inventors
- 👤 Charles P Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:56
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/06; B01J27/08; B01J27/12; B01J21/00; B01J21/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A METHOD OF PREPARING A SIO2--MGO CATLYST WHICH COMPRISES THE STEPS OF REACTING A COLLODIAL DISPERSION OF HYDRATED MAGNESIA AND MAGNESIUM OXYSALT WITH SILICA HYDROGEL, RECOVERING THE RESULTING SILICA-MAGNESIA COMPLEX THEREFROM, DISPERSING SAID COMPLEX INTO AN AQUEOUS SLURRY CONTAINING FREE MAGNESIUM IONS, THEREBY INCREASING THE CONTENT OF FREE MAGNESIUM IONS, AGING SAID SLURRY AT AN ELEVATED TEMPERATURE, SEPARATING THE SOLIDS THEREFROM, RESLURRYING SAID SOLIDS WITH A SOLUTION CONTAINING DISSOLVED FLUORINE, AT A CONCENTRATION SUFFICIENT TO IMPREGNATE SAID SILICA-MAGNESIA COMPLEX WITH FROM O.5 TO 5.0 WT. PERCENT OF RESIDUAL FLUORINE IN SAID CATALYST, AND WASHING AND DRYING SAID COMPOSITE.
Claim 2
Independent Claim
98 words
A METHOD OF PREPARING A SIO2--MGO CATLYST WHICH COMPRISES THE STEPS OF REACTING A COLLODIAL DISPERSION OF HYDRATED MAGNESIA AND MAGNESIUM OXYSALT WITH SILICA HYDROGEL, RECOVERING THE RESULTING SILICA-MAGNESIA COMPLEX THEREFROM, DISPERSING SAID COMPLEX INTO AN AQUEOUS SLURRY CONTAINING FREE MAGNESIUM IONS, THEREBY INCREASING THE CONTENT OF FREE MAGNESIUM IONS, AGING SAID SLURRY AT AN ELEVATED TEMPERATURE, SEPARATING THE SOLIDS THEREFROM, RESLURRYING SAID SOLIDS WITH A SOLUTION CONTAINING DISSOLVED FLUORINE, AT A CONCENTRATION SUFFICIENT TO IMPREGNATE SAID SILICA-MAGNESIA COMPLEX WITH FROM O.5 TO 5.0 WT. PERCENT OF RESIDUAL FLUORINE IN SAID CATALYST, AND WASHING AND DRYING SAID COMPOSITE.
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) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |