US3840587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the condensation of formaldehyde with carboxylic acids
Assignee: Monsanto Co
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Filing: 1972-08-03
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Granted: 1974-10-08
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Expires: 1992-08-03
Abstract
Abstract 1. IN AN IMPROVED PROCESS FOR THE VAPOR PHASE CONDENSATION OF FORMALDEHYDE WITH SATURATED CARBOXYLIC ACIDS HAVING AT LEAST TWO CARBON ATOMS WHICH COMPRISES CONTACTING THE SAID REACTANTS WITH A CATALYST CONSISTING ESSENTIALLY OF A COMPOUND OF POTASSIUM, RUBIDIUM OR CESIUM DISPERSED ON A SOLID CARRIER, THE IMPROVEMENTS COMPRISING THE FOLLOWING CONDITIONS: (A) THE SAID CATALYST HAVING SPECIFIC SURFACE AREA OF FROM 350 TO 1000 M.2GM.-1. (B) A TEMPERATURE OF OPERATION OF FROM 400* TO 600* C. (C) A FEED MOLE RATIO OF CARBOXYLIC ACID TO FORMALDEHYDE IN THE RANGE OF 0.1:1 TO 7.5:1, AND (D) A FEED MOLE RATIO OF WATER TO FORMALDEHYDE IN THE RANGE OF 0.01:1 TO 10:1.
Inventors
- 👤 A Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:21
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/347; C07C51/353; B; B01; B01J; B01J23/00; B01J23/02; B01J23/04; B01J35/00; B01J35/60; B01J35/61; B01J35/615; B01J35/617
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
IN AN IMPROVED PROCESS FOR THE VAPOR PHASE CONDENSATION OF FORMALDEHYDE WITH SATURATED CARBOXYLIC ACIDS HAVING AT LEAST TWO CARBON ATOMS WHICH COMPRISES CONTACTING THE SAID REACTANTS WITH A CATALYST CONSISTING ESSENTIALLY OF A COMPOUND OF POTASSIUM, RUBIDIUM OR CESIUM DISPERSED ON A SOLID CARRIER, THE IMPROVEMENTS COMPRISING THE FOLLOWING CONDITIONS: (A) THE SAID CATALYST HAVING SPECIFIC SURFACE AREA OF FROM 350 TO 1000 M.2GM.-1. (B) A TEMPERATURE OF OPERATION OF FROM 400* TO 600* C. (C) A FEED MOLE RATIO OF CARBOXYLIC ACID TO FORMALDEHYDE IN THE RANGE OF 0.1:1 TO 7.5:1, AND (D) A FEED MOLE RATIO OF WATER TO FORMALDEHYDE IN THE RANGE OF 0.01:1 TO 10:1.
Claim 2
Dependent Claim
110 words
IN AN IMPROVED PROCESS FOR THE VAPOR PHASE CONDENSATION OF FORMALDEHYDE WITH SATURATED CARBOXYLIC ACIDS HAVING AT LEAST TWO CARBON ATOMS WHICH COMPRISES CONTACTING THE SAID REACTANTS WITH A CATALYST CONSISTING ESSENTIALLY OF A COMPOUND OF POTASSIUM, RUBIDIUM OR CESIUM DISPERSED ON A SOLID CARRIER, THE IMPROVEMENTS COMPRISING THE FOLLOWING CONDITIONS: (A) THE SAID CATALYST HAVING SPECIFIC SURFACE AREA OF FROM 350 TO 1000 M.2GM.-1. (B) A TEMPERATURE OF OPERATION OF FROM 400* TO 600* C. (C) A FEED MOLE RATIO OF CARBOXYLIC ACID TO FORMALDEHYDE IN THE RANGE OF 0.1:1 TO 7.5:1, AND (D) A FEED MOLE RATIO OF WATER TO FORMALDEHYDE IN THE RANGE OF 0.01:1 TO 10:1.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |