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US4523027A
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Purification of carboxylates containing aldehydes, acetals and/or unsaturated compounds
Assignee: BASF SE
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Filing: 1983-07-28
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Granted: 1985-06-11
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Expires: 2003-07-28
Abstract
Abstract Carboxylates which contain aldehydes, acetals and/or unsaturated compounds and are obtained by reacting an olefinically unsaturated compound with carbon monoxide and an alkanol are purified by a process wherein the said carboxylates are treated with hydrogen at elevated temperatures in the presence of an acidic ion exchanger or zeolite doped with one or more metals of group VIII of the periodic table, and the resulting low and/or high boilers are separated off by distillation.
Inventors
- 👤 Rudolf Kummer
- 👤 Heinz-Walter Schneider
- 👤 Volker Taglieber
- 👤 Franz-Josef Weiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:46
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/48; C07C67/60
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
72 words
A process for purifying a carboxylate which contains aldehydes, acetals and/or unsaturated compounds and is obtained by reacting an olefinically unsaturated compound with carbon monoxide and an alkanol which process comprises: treating said carboxylate with hydrogen at elevated temperatures in the presence of an acidic ion exchanger or zeolite doped with one or more metals of group VIII of the periodic table, and separating the resulting low and/or high boilers by distillation.
Claim 2
Dependent Claim
72 words
A process for purifying a carboxylate which contains aldehydes, acetals and/or unsaturated compounds and is obtained by reacting an olefinically unsaturated compound with carbon monoxide and an alkanol which process comprises: treating said carboxylate with hydrogen at elevated temperatures in the presence of an acidic ion exchanger or zeolite doped with one or more metals of group VIII of the periodic table, and separating the resulting low and/or high boilers by distillation.
Claim 3
Dependent Claim
19 words
The process of claim 1, wherein the acidic ion exchanger or the zeolite is doped with palladium or platinum.
Claim 4
Dependent Claim
15 words
The process of claim 1, wherein the temperature employed is from 80° to 140° C.
Claim 5
Dependent Claim
13 words
The process of claim 1, wherein a strongly acidic ion exchanger is used.
Claim 6
Dependent Claim
25 words
The process of claim 1, wherein the starting mixture is dimethyl adipate containing, as impurities, methyl 5-formylvalerate and/or methyl 6,6-dimethoxycaproate and/or dimethyl butenedicarboxylate and/or tridecenones.
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) | 1988-06-10 | 1988-12-10 | 1989-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-10 | 1992-12-10 | 1993-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-10 | 1996-12-10 | 1997-06-11 | $7700.00 | Window Closed / Lapsed |