Catalyst and method of manufacture
Abstract
Abstract A CATALYST, A METHOD FOR ITS PREPARATION, AND A METHOD OF PREPARING CATALYTIC COBALT MOLYBDATE, USEFUL FOR THE OOXIDATION OF OLEFINS TO THE CORRESPONDING UNSATURATED ALDEHYDES AND UNSATURATED CARBOXYLIC ACIDS RE PROVIDED. THE SOLID CATALYST IS IN THE FORM OF PARTICLES, EACH PERTICLE COMPRISING A FLUXED MIXTURE OF (A) CALCINED COBALT MOLYDBATE PARTICLES, (B) A TELLURIDE OF ARSENIC, BISMUTH OR ANTIMONY, AND (C) A MOLYBDENUM COMPOUND, SUCH AS MOLYBDENUM TRIOXIDE, WHICH IS VOLATILE TO AN EXTENT THAT SLOW MIGRATION WITHIN THE PELLET OCCURS AT ELEVATED TEMPERATURES. THE VOLATILE MOLYBDENUM COMPOUND, NON-CATALYTIC IN ITSELF, SURPRISINGLY GIVES A MUCH LONGER PRODUCTIVE LIFE TO THE CATALYST; THE CATALYST, IN SPITE OF THE DILUENT, IS MORE PRODUCTIVE PER UNIT OF TIME; AND THE ADDED PHYSICALLY SOFT COMPOUND DOES NOT MAKE THE PARTICLES FRAGILE. IN USE THE TELLURIUM CONTENT DIMINISHES, AND THE COMPOSITION OF THE CATALYST CHANGES SLOWLY IN OTHER WAYS.
Inventors
- 👤 J Nemec
- 👤 F Schlaefer
Bibliographic Details
Claims Analysis
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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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |