Patent US4239911A successfully refreshed from Google Patents.
US4239911A
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US
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Manufacture of glycol esters
Assignee: BASF SE
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Filing: 1977-05-24
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Granted: 1980-12-16
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Expires: 1997-05-24
Abstract
Abstract Alkylene glycol dicarboxylates are obtained by reacting carboxylic acid esters of monohydric or polyhydric aliphatic short-chain alcohols with an olefin and oxygen in the presence of a catalyst, a hydrolyzing agent and water.
Inventors
- 👤 Hans-Martin Weitz
- 👤 Juergen Hartig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:55
CPC Classifications
C; C07; C07C; C07C67/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
135 words
In a one-step liquid phase process for the manufacture of ethylene glycol diformate or diacetate or 1,2-propylene glycol diformate or diacetate by reacting ethylene or propylene, molecular oxygen and the appropriate carboxylic acid in a reaction chamber and in the presence of an effective amount of oxyacylation catalyst containing a compound of a transition metal selected from the group of Te, Ce, Sb, Mn, V, Ga, As and Co in conjuction with a halogen or a hydrohalic acid, the improvement which comprises: using an ester of formic acid or acetic acid with a short-chain aliphatic alcohol of 1-5 carbon atoms in place of the carboxylic acid and carrying out the reaction in the presence of an effective amount of an hydrolysis catalyst and not less than 1 mole of water per mole of olefin converted.
Claim 2
Dependent Claim
135 words
In a one-step liquid phase process for the manufacture of ethylene glycol diformate or diacetate or 1,2-propylene glycol diformate or diacetate by reacting ethylene or propylene, molecular oxygen and the appropriate carboxylic acid in a reaction chamber and in the presence of an effective amount of oxyacylation catalyst containing a compound of a transition metal selected from the group of Te, Ce, Sb, Mn, V, Ga, As and Co in conjuction with a halogen or a hydrohalic acid, the improvement which comprises: using an ester of formic acid or acetic acid with a short-chain aliphatic alcohol of 1-5 carbon atoms in place of the carboxylic acid and carrying out the reaction in the presence of an effective amount of an hydrolysis catalyst and not less than 1 mole of water per mole of olefin converted.
Claim 3
Dependent Claim
19 words
A process as set forth in claim 1, wherein methyl acetate or ethyl acetate is used as the ester.
Claim 4
Dependent Claim
18 words
A process as set forth in claim 1, wherein the glycol ester itself is used as the ester.
Claim 5
Dependent Claim
15 words
A process as set forth in claim 1, wherein the hydrolysis catalyst is an acid.
Claim 6
Dependent Claim
23 words
A process as set forth in claim 1, wherein the oxyacylation is carried out at temperatures of from about 100° to 200° C.
Claim 7
Dependent Claim
23 words
A process as set forth in claim 1, wherein the oxyacylation is carried out at pressures of from about 10 to 200 bars.
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) | 1983-12-16 | 1984-06-16 | 1984-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-16 | 1988-06-16 | 1988-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-16 | 1992-06-16 | 1992-12-16 | $7700.00 | Window Closed / Lapsed |