US2812310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and catalyst for oxidation of methanol to formaldehyde
Assignee: Reichhold Chemicals Inc
•
Filing: 1954-10-11
•
Granted: 1957-11-05
•
Expires: 1974-10-11
Abstract
No abstract record available.
Inventors
- 👤 Walker Robert Bruce
- 👤 Harold O Warner
- 👤 Theodore S Hodgins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:44
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/90; B01J23/94; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/881; C; C07; C07C; C07C45/00; C07C45/27; C07C45/32; C07C45/37; C07C45/38; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A PROCESS FOR THE PREPARATION OF A METHANOL TO FORMALDEHYDE CONVERSION CATALYST CONSISTING OF THE STEPS OF SIZING TO REMOVE ALL PARTICLES LARGER THAN 4 MESH AND SMALLER THAN 20 MESH TO THE INCH FROM SPENT MOLYBDENUM OXIDE-IRON OXIDE CATALYST WHICH CONTAINS MOO3 AND FE2O3 IN THE MOLE RATIO BETWEEN 3.6 AND 11.1 AND CONTAINING SUBSTANTIALLY NO WATER OR AMMONIA AND COMBINING NOT LESS THAN 30% NOR MORE THAN 50% BY WEIGHT WITH FRESH MOLYBDENUM OXIDE-IRON OXIDE CATALYST PRECURSOR WHICH CONTAINS MOO3 AND FE2O3 IN THE MOLE RATIO BETWEEN 3.6 AND 11.1 AND HEAT TREATING AND AIR BLOWING WHILE CONTAINED WITHIN A METHANOL CONVERTER UNTIL ACTIVATED PRIOR TO THE INTRODUCTION OF METHANOL.
Claim 2
Dependent Claim
112 words
A PROCESS FOR THE PREPARATION OF A METHANOL TO FORMALDEHYDE CONVERSION CATALYST CONSISTING OF THE STEPS OF SIZING TO REMOVE ALL PARTICLES LARGER THAN 4 MESH AND SMALLER THAN 20 MESH TO THE INCH FROM SPENT MOLYBDENUM OXIDE-IRON OXIDE CATALYST WHICH CONTAINS MOO3 AND FE2O3 IN THE MOLE RATIO BETWEEN 3.6 AND 11.1 AND CONTAINING SUBSTANTIALLY NO WATER OR AMMONIA AND COMBINING NOT LESS THAN 30% NOR MORE THAN 50% BY WEIGHT WITH FRESH MOLYBDENUM OXIDE-IRON OXIDE CATALYST PRECURSOR WHICH CONTAINS MOO3 AND FE2O3 IN THE MOLE RATIO BETWEEN 3.6 AND 11.1 AND HEAT TREATING AND AIR BLOWING WHILE CONTAINED WITHIN A METHANOL CONVERTER UNTIL ACTIVATED PRIOR TO THE INTRODUCTION OF METHANOL.
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) | 1960-11-04 | 1961-05-06 | 1961-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-04 | 1965-05-06 | 1965-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-04 | 1969-05-06 | 1969-11-05 | $7700.00 | Window Closed / Lapsed |