US4786756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic conversion of lactic acid and ammonium lactate to acrylic acid
Assignee: Standard Oil Co
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Filing: 1984-11-05
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Granted: 1988-11-22
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Expires: 2004-11-05
Abstract
Abstract Disclosed is a process for the catalytic conversion of lactic acid and/or ammonium lactate to acrylic acid by contacting a mixture of water and lactic acid and/or ammonium lactate in the vapor phase with aluminum phosphate which has been treated with an aqueous inorganic base.
Inventors
- 👤 Christos Paparizos
- 👤 Serge R. Dolhyj
- 👤 Wilfrid G. Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:09
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/347; C07C51/377
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
58 words
A process for the catalytic conversion of lactic acid and/or ammonium lactate to acrylic acid which comprises contacting a mixture of water and lactic acid and/or ammonium lactate in the vapor phase with solid aluminum phosphate which has been treated with an aqueous inorganic base and calcined at a temperature in the range from 300° to 650° C.
Claim 2
Dependent Claim
58 words
A process for the catalytic conversion of lactic acid and/or ammonium lactate to acrylic acid which comprises contacting a mixture of water and lactic acid and/or ammonium lactate in the vapor phase with solid aluminum phosphate which has been treated with an aqueous inorganic base and calcined at a temperature in the range from 300° to 650° C.
Claim 3
Dependent Claim
12 words
A process of claim 1 wherein said base is aqueous ammonium hydroxide.
Claim 4
Dependent Claim
12 words
A process of claim 1 wherein said base is aqueous potassium hydroxide.
Claim 5
Dependent Claim
19 words
A process of claim 1 wherein said contacting is effected at a temperature in the range from 250°-450° C.
Claim 6
Dependent Claim
58 words
A process for the catalytic conversion of lactic acid and/or ammonium lactate to acrylic acid which comprises contacting a mixture of water and lactic acid and/or ammonium lactate in the vapor phase with solid aluminum phosphate which has been treated with an aqueous inorganic base and calcined at a temperature in the range from 320° to 375° C.
Claim 7
Dependent Claim
58 words
A process for the catalytic conversion of lactic acid and/or ammonium lactate to acrylic acid which comprises contacting a mixture of water and lactic acid and/or ammonium lactate in the vapor phase with solid aluminum phosphate which has been treated with an aqueous inorganic base and calcined at a temperature in the range from 320° to 375° C.
References Cited (Backward Citations)
US2174830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-22 | 1992-05-23 | 1992-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-22 | 1996-05-23 | 1996-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-22 | 2000-05-23 | 2000-11-22 | $7700.00 | Window Closed / Lapsed |