US2812309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unsupported catalyst for the oxidation
Assignee: —
•
Filing: —
•
Granted: 1957-11-05
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Expires: 1974-11-05
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:27
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/28; C; C07; C07C; C07C47/00; C07C47/02; C07C47/04; B01J23/002; B01J23/70; B01J23/74; B01J23/745; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/881; B01J37/00; B01J37/02; B01J37/03; B01J37/031; C07C31/00; C07C31/02; C07C31/04; C07C45/00; C07C45/27; C07C45/32; C07C45/37; C07C45/38; B01J2523/00; B01J2523/80; B01J2523/84; B01J2523/842
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A METHOD OF PREPARING A CATALYST PRECURSOR SUITABLE AFTER FINAL PROCESSING WITHIN A METHANOL CONVERTER FOR THE CATALYTIC CONVERSION OF METHANOL TO FORMALDEHYDE, WHICH COMPRISES ADDING AN AQUEOUS IRON SOLUTION HAVING A PH BETWEEN 1.7 AND 2.1 TO AN AQUEOUS SOLUTION OF A SOLUBLE MOLYBDATE HAVING A PH BETWEEN 2.25 AND 5.0, SAID COMBINATION YIELDING A PRECIPITATE HAVING A MOLAR RATIO OF MOO3 TO FE2O3 OF FROM 3.6 TO 11.1, FILTERING AND WASHING THE PRECIPITATE UNTIL THE WASH WATER IS ESSENTIALLY FREE OF SOLUBLE IONS, DRYING THE FILTER CAKE FOR BETWEEN 30 AND 100 HOURS AT A TEMPERATURE FROM ABOUT 150*F. TO ABOUT 205*F., CONTINUING THE DRYING FOR BETWEEN ABOUT 4 TO 24 HOURS AT ABOUT 215*F. TO ABOUT 275*F., COMMINUTING THE PARTIALLY DRIED PRECIPITATE, AND CONTINUING DRYING FOR BETWEEN ABOUT 12 TO ABOUT 60 HOURS AT AROUND 300*F, UNTIL THE FINAL MOISTURE CONTENT OF THE CATALYST PRECURSOR IS BETWEEN 2 AND 25%.
Claim 2
Independent Claim
153 words
A METHOD OF PREPARING A CATALYST PRECURSOR SUITABLE AFTER FINAL PROCESSING WITHIN A METHANOL CONVERTER FOR THE CATALYTIC CONVERSION OF METHANOL TO FORMALDEHYDE, WHICH COMPRISES ADDING AN AQUEOUS IRON SOLUTION HAVING A PH BETWEEN 1.7 AND 2.1 TO AN AQUEOUS SOLUTION OF A SOLUBLE MOLYBDATE HAVING A PH BETWEEN 2.25 AND 5.0, SAID COMBINATION YIELDING A PRECIPITATE HAVING A MOLAR RATIO OF MOO3 TO FE2O3 OF FROM 3.6 TO 11.1, FILTERING AND WASHING THE PRECIPITATE UNTIL THE WASH WATER IS ESSENTIALLY FREE OF SOLUBLE IONS, DRYING THE FILTER CAKE FOR BETWEEN 30 AND 100 HOURS AT A TEMPERATURE FROM ABOUT 150*F. TO ABOUT 205*F., CONTINUING THE DRYING FOR BETWEEN ABOUT 4 TO 24 HOURS AT ABOUT 215*F. TO ABOUT 275*F., COMMINUTING THE PARTIALLY DRIED PRECIPITATE, AND CONTINUING DRYING FOR BETWEEN ABOUT 12 TO ABOUT 60 HOURS AT AROUND 300*F, UNTIL THE FINAL MOISTURE CONTENT OF THE CATALYST PRECURSOR IS BETWEEN 2 AND 25%.
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 |