Alumina-bonded catalysts
Abstract
Abstract THE INVENTION RELATES TO SILICEOUS MATERIALS, PARTICULARLY ZEOLITE-BASE CATALYSTS, WHICH EMPLOY ACID-TREATED BOEHMITE ALUMINA AS A BINDER. THE ACID TREATMENT CONSISTS OF TREATMENT OF THE BOEHMITE WITH AT LEAST 0.5 EQUIVALENT OF ACID PER MOLE OF BOEHMITE. THE ACID EMPLOYED IN THE TREATMENT IS A MINERAL ACID HAVING A MONOVALENT ANION OR A SALT THEREOF, E.G., NITRIC ACID, HYDROCHLORIC ACID OR THEIR SALTS. THE CATALYSTS FIND UTILITY IN PROCESSES SUCH AS CRACKING, HYDROCRACKING, HYDROTREATING, ISOMERIZATION, ETC. THE BINDER COMPOSITION COMPRISING THE ACID-TREATED BOEHMITE MAY ALSO BE USED FOR BINDING A VARIETY OF SILICEOUS COMPOSITIONS SUCH AS AMORPHOUS COMBINATIONS OF SILICA AND ALUMINA, ACTIVATED CLAYS, SILICA GEL, ETC.
Inventors
- 👤 Dean Arthur Young
- 👤 Grant A Mickelson
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |