Patent US4112235A successfully refreshed from Google Patents.
US4112235A
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Transesterification of carboxylic acids
Assignee: Honeywell UOP LLC
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Filing: 1976-10-28
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Granted: 1978-09-05
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Expires: 1996-10-28
Abstract
Abstract Carboxylic acids may be esterified by reaction with esters in the presence of a catalytic amount of a tin halide catalyst, the reaction being effected at temperatures ranging from about 0° to about 150° C.
Inventors
- 👤 Louis Schmerling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:17
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/10; C07C2601/00; C07C2601/12; C07C2601/14; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
106 words
A transesterification process which comprises reacting, in the presence of a catalytic amount of stannic chloride, bromide or iodide at a temperature in the range of from about 0° to about 150° C. and a pressure in the range of from about atmospheric to about 100 atmospheres, a carboxylic acid selected from the group consisting of fatty acids of from 1 to about 20 carbon atoms, cycloalkanecarboxylic acids having from 5 to 8 carbon atoms in the ring and aromatic carboxylic acids with an alkyl, cycloalkyl, unsaturated aliphatic, cycloaliphatic or benzyl formate, acetate, butyrate, acrylate, crotonate, oleate or benzoate, and recovering the resultant esterified carboxylic acid.
Claim 2
Dependent Claim
106 words
A transesterification process which comprises reacting, in the presence of a catalytic amount of stannic chloride, bromide or iodide at a temperature in the range of from about 0° to about 150° C. and a pressure in the range of from about atmospheric to about 100 atmospheres, a carboxylic acid selected from the group consisting of fatty acids of from 1 to about 20 carbon atoms, cycloalkanecarboxylic acids having from 5 to 8 carbon atoms in the ring and aromatic carboxylic acids with an alkyl, cycloalkyl, unsaturated aliphatic, cycloaliphatic or benzyl formate, acetate, butyrate, acrylate, crotonate, oleate or benzoate, and recovering the resultant esterified carboxylic acid.
Claim 3
Dependent Claim
16 words
The process as set forth in claim 1 in which the catalyst is anhydrous stannic chloride.
Claim 4
Dependent Claim
16 words
The process as set forth in claim 1 in which the catalyst is stannic chloride pentahydrate.
Claim 5
Dependent Claim
15 words
The process as set forth in claim 1 in which the catalyst is stannic bromide.
Claim 6
Dependent Claim
28 words
The process as set forth in claim 1 in which said acid is propionic acid, said ester is allyl acetate and said esterified carboxylic acid is allyl propionate.
Claim 7
Dependent Claim
28 words
The process as set forth in claim 1 in which said acid is propionic acid, said ester is vinyl acetate and said esterified carboxylic acid is vinyl propionate.
Claim 8
Dependent Claim
28 words
The process as set forth in claim 1 in which said acid is phthalic acid, said ester is allyl acetate and said esterified carboxylic acid is allyl phthalate.
Claim 9
Dependent Claim
28 words
The process as set forth in claim 1 in which said acid is crotonic acid, said ester is benzyl benzoate and said esterified carboxylic acid is benzyl crotonate.
Claim 10
Dependent Claim
28 words
The process as set forth in claim 1 in which said acid is cyclohexanecarboxylic acid, said ester is butyl acrylate and said esterified carboxylic acid is butyl cyclohexanecarboxylate.
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) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |