Patent US3129189A successfully refreshed from Google Patents.
US3129189A
Expired / Lapsed
US
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Process for preparing a silica-magnesia-fluorine hydrocarbon cracking catalyst
Assignee: WR Grace and Co
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Filing: 1960-06-08
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Granted: 1964-04-14
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Expires: 1980-06-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles P Wilson
- 👤 Frank G Ciapetta
- 👤 Jr James W Elston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:46
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/14; B01J27/00; B01J27/06; B01J27/08; B01J27/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A PROCESS FOR PREPARING A SILICA-MAGNESIA HYDROCARBON CRACKING CATALYST CONTAINING 0.5 TO 5% FLUORIDE WHICH COMPRISES: (A) DILUTING AN ALKALI METAL SILICATE SOLUTION TO A SILICA TO ALKALI METAL OXIDE RATIO OF 1:1 TO 4:1, (B) GELLING THE SILICATE BY THE ADDITION OF A MINERAL ACID THERETO, WHEREIN SUFFICIENT ACID IS ADDED TO NEUTRALIZE 80 TO 90% OF THE NA2O PRESENT AND ADJUST THE SLURRY PH TO 5 TO 8, (C) AGING THE SILICA GEL AT 80 TO 150*%F., (D) SIMUNTANEOUSLY ADDING CALCINED MGO AND H2SO4 TO THE GELLED SILICATE IN AN AMOUNT SUFFICIENT TO PROVIDE 20 TO 30% MGO IN THE FINAL CATALYST AND TO ADJUST THE SLURRY PH TO 7.5 TO 8.5, (E) AGING AT 175 TO 185*F. FOR 1 TO 3 HOURS, (F) FILTERING THE COMPOSITE, (G) ADDING A QUANTITY OF A SOLUTION OF A SOLUBLE FLUORIDE SALT SUFFICIENTLY TO PROVIDE 0.5 TO 5% FLUORIDE, (H) SPRAY DURING, WASHING, REDRYING AND RECOVERING THE PRODUCT.
Claim 2
Dependent Claim
157 words
A PROCESS FOR PREPARING A SILICA-MAGNESIA HYDROCARBON CRACKING CATALYST CONTAINING 0.5 TO 5% FLUORIDE WHICH COMPRISES: (A) DILUTING AN ALKALI METAL SILICATE SOLUTION TO A SILICA TO ALKALI METAL OXIDE RATIO OF 1:1 TO 4:1, (B) GELLING THE SILICATE BY THE ADDITION OF A MINERAL ACID THERETO, WHEREIN SUFFICIENT ACID IS ADDED TO NEUTRALIZE 80 TO 90% OF THE NA2O PRESENT AND ADJUST THE SLURRY PH TO 5 TO 8, (C) AGING THE SILICA GEL AT 80 TO 150*%F., (D) SIMUNTANEOUSLY ADDING CALCINED MGO AND H2SO4 TO THE GELLED SILICATE IN AN AMOUNT SUFFICIENT TO PROVIDE 20 TO 30% MGO IN THE FINAL CATALYST AND TO ADJUST THE SLURRY PH TO 7.5 TO 8.5, (E) AGING AT 175 TO 185*F. FOR 1 TO 3 HOURS, (F) FILTERING THE COMPOSITE, (G) ADDING A QUANTITY OF A SOLUTION OF A SOLUBLE FLUORIDE SALT SUFFICIENTLY TO PROVIDE 0.5 TO 5% FLUORIDE, (H) SPRAY DURING, WASHING, REDRYING AND RECOVERING THE PRODUCT.
References Cited (Backward Citations)
US2477695A
Cited
US2901440A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |