Patent US3423332A successfully refreshed from Google Patents.
US3423332A
Expired / Lapsed
US
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Hydrothermal activation of a silicaalumina cracking catalyst at a high ph
Assignee: WR Grace and Co
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Filing: 1966-01-19
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Granted: 1969-01-21
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Expires: 1986-01-19
Abstract
No abstract record available.
Inventors
- 👤 Philip K Maher
- 👤 Richard W Baker
- 👤 Carl V Mcdaniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:56
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/16; B01J21/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A PROCESS FOR PREPARING AN IMPROVED SILICA-ALUMINA CRACKING CATALYST HAVING AN ALUMINA CONTENT OF ABOUT 5 TO 45 PERCENT WHICH COMPRISES THE STEPS OF: (A) SELECTING A SUITABLE FRESH SILICA-ALMINA CATALYTIC BASE MATERIAL, (B) ADDING A SUFFICIENT QUANTITY OF AN ALKALI META HYDROXIDE TO INCREASE THE PH OF THE RESULTING SLURRY TO ABOUT 10 TO 14, (C) HEATING THE COMPOSITE TO ABOUT 30 TO 150*C. FOR ABOUT 18 TO 0.5 HOURS TO COMPLETE ACTIVATION AND TO THEREBY FORM AN ESSENTIALLY AMORPHOUS PRODUCT, (D) REDUCING THE ALKALI METAL CONTENT OF THE PRODUCT TO BELOW ABOUT 1.0 PERCENT BY ION EXCHANGE WITH A SOLUTION OF AN AMMONIUM SALT SELECTED FROM THE GROUP CONSISTING OF AMMONIUM CHLORIDE AND AMMONIUM SULFATE, (E) WASHING, DRYING AND RECOVERING THE PRODUCT.
Claim 2
Dependent Claim
124 words
A PROCESS FOR PREPARING AN IMPROVED SILICA-ALUMINA CRACKING CATALYST HAVING AN ALUMINA CONTENT OF ABOUT 5 TO 45 PERCENT WHICH COMPRISES THE STEPS OF: (A) SELECTING A SUITABLE FRESH SILICA-ALMINA CATALYTIC BASE MATERIAL, (B) ADDING A SUFFICIENT QUANTITY OF AN ALKALI META HYDROXIDE TO INCREASE THE PH OF THE RESULTING SLURRY TO ABOUT 10 TO 14, (C) HEATING THE COMPOSITE TO ABOUT 30 TO 150*C. FOR ABOUT 18 TO 0.5 HOURS TO COMPLETE ACTIVATION AND TO THEREBY FORM AN ESSENTIALLY AMORPHOUS PRODUCT, (D) REDUCING THE ALKALI METAL CONTENT OF THE PRODUCT TO BELOW ABOUT 1.0 PERCENT BY ION EXCHANGE WITH A SOLUTION OF AN AMMONIUM SALT SELECTED FROM THE GROUP CONSISTING OF AMMONIUM CHLORIDE AND AMMONIUM SULFATE, (E) WASHING, DRYING AND RECOVERING THE PRODUCT.
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) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |