US4122285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of butenediol diacetate
Assignee: BASF SE
•
Filing: 1976-08-13
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Granted: 1978-10-24
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Expires: 1996-08-13
Abstract
Abstract Butenediol diacetate is manufactured by reaction of butadiene, oxygen and acetic acid over a palladium or platinum catalyst, only liquid, and no gases, being present in the reaction chamber.
Inventors
- 👤 Hans-Martin Weitz
- 👤 Ludwig Vogel
- 👤 Juergen Hartig
- 👤 Eckhard Hetzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:53
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/04; C07C67/05; C07C67/055; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
91 words
In a liquid state process for the manufacture of but-2-ene-1,4-diol diacetate and/or but-1-ene-3,4-diol diacetate in which butadiene, oxygen and acetic acid are reacted in a reaction chamber over a solid catalyst which contains palladium and/or platinum as well as tellurium and/or antimony, the improvement which comprises: dissolving all of the gaseous reactant in the liquid reactant in a mixing apparatus separate from the reaction chamber and thereafter passing the reactants into a reaction chamber which is filled with liquid whereby the reaction takes place in the absence of a gas phase.
Claim 2
Dependent Claim
91 words
In a liquid state process for the manufacture of but-2-ene-1,4-diol diacetate and/or but-1-ene-3,4-diol diacetate in which butadiene, oxygen and acetic acid are reacted in a reaction chamber over a solid catalyst which contains palladium and/or platinum as well as tellurium and/or antimony, the improvement which comprises: dissolving all of the gaseous reactant in the liquid reactant in a mixing apparatus separate from the reaction chamber and thereafter passing the reactants into a reaction chamber which is filled with liquid whereby the reaction takes place in the absence of a gas phase.
Claim 3
Dependent Claim
19 words
A process as set forth in claim 1, wherein a vertical tube reactor is used as the reaction chamber.
Claim 4
Dependent Claim
20 words
A process as set forth in claim 1, wherein an operating pressure of from 5 to 50 bars is maintained.
Claim 5
Dependent Claim
17 words
A process as set forth in claim 1, wherein the temperature is from 60° to 120° C.
Claim 6
Dependent Claim
25 words
A process as set forth in claim 1, wherein the catalyst used is a palladium catalyst or platinum catalyst on active charcoal as the carrier.
Claim 7
Dependent Claim
34 words
A process as set forth in claim 1, wherein the palladium and/or platinum catalyst is supported on a carrier, said catalyst being used in the amount of from 0.1 to 20% percent by weight.
Claim 8
Dependent Claim
30 words
A process as set forth in claim 6, wherein the amount of tellurium and/or antimony used in said palladium and/or platinum catalyst is from 0.5 to 10 percent by weight.
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) | 1981-10-23 | 1982-04-24 | 1982-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-23 | 1986-04-24 | 1986-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-23 | 1990-04-24 | 1990-10-24 | $7700.00 | Window Closed / Lapsed |