US4140865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of vinyl acetic acid
Assignee: Hoechst AG
•
Filing: 1976-03-12
•
Granted: 1979-02-20
•
Expires: 1996-03-12
Abstract
Abstract Vinylacetic acid and optionally γ-butyrolactone are prepared by reacting an allyl compound substituted by oxygen functions with carbon monoxide in the presence of a heavy metal catalyst. When the reaction is carried out with an allyl ether or a carboxylic acid allyl ester, water is added. Vinylacetic acid is obtained in a very good yield in simple and economic manner.
Inventors
- 👤 Hans Fernholz
- 👤 Dieter Freudenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:56
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/10; C07C51/12
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
118 words
A process for the selective manufacture of vinyl acetic acid wherein a reaction mixture consisting of allyl alcohol and carbon monoxide is reacted at a pressure of about 0.5 to about 500 atmospheres (gauge) and a temperature of about 50° C. to about 300° C. in the presence of about 0.02 to about 5 grams per mol of said allyl alcohol of a principal catalyst consisting essentially of cobalt, nickel, rhodium or palladium, in elemental form, or a carbonyl or a halide of one of said metals, or a mixture thereof, and a co-catalyst consisting essentially of methyl iodide or palladium iodide, to form vinyl acetic acid; and separating the formed vinyl acetic acid from the reaction mixture.
Claim 2
Dependent Claim
118 words
A process for the selective manufacture of vinyl acetic acid wherein a reaction mixture consisting of allyl alcohol and carbon monoxide is reacted at a pressure of about 0.5 to about 500 atmospheres (gauge) and a temperature of about 50° C. to about 300° C. in the presence of about 0.02 to about 5 grams per mol of said allyl alcohol of a principal catalyst consisting essentially of cobalt, nickel, rhodium or palladium, in elemental form, or a carbonyl or a halide of one of said metals, or a mixture thereof, and a co-catalyst consisting essentially of methyl iodide or palladium iodide, to form vinyl acetic acid; and separating the formed vinyl acetic acid from the reaction mixture.
Claim 3
Dependent Claim
16 words
A process according to claim 1 wherein said pressure is about 20 to about 250 atmospheres.
Claim 4
Dependent Claim
15 words
A process according to claim 1 wherein said pressure is greater than about 80 atmospheres.
Claim 5
Dependent Claim
17 words
A process according to claim 1 wherein said temperature is about 110° C. to about 160° C.
Claim 6
Dependent Claim
17 words
A process according to claim 1 wherein said principal catalyst is a carbonyl or a halide compound.
Claim 7
Dependent Claim
17 words
A process according to claim 1 wherein said principal catalyst is a chloride or an iodide compound.
Claim 8
Dependent Claim
18 words
A process according to claim 1 wherein about 0.05 to about 1 gram of principal catalyst is used.
Claim 9
Dependent Claim
18 words
A process according to claim 1 wherein about 0.1 to about 0.6 gram of principal catalyst is used.
Claim 10
Dependent Claim
27 words
A process according to claim 1 wherein said co-catalyst is used in an amount of about 0.5 to about 20 times the amount of said principal catalyst.
Claim 11
Dependent Claim
27 words
A process according to claim 1 wherein said co-catalyst is used in an amount of about 5 to about 8 times the amount of said principal catalyst.
Claim 12
Dependent Claim
38 words
A process according to claim 1 wherein said principal catalyst and co-catalyst are RhCl 3 .H 2 O and CH 3 I, Ni(CO) 4 and CH 3 I or RhCl 3 .H 2 O and PdI 2 .
References Cited (Backward Citations)
US3437676A
Cited
US3816488A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-19 | 1982-08-21 | 1983-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-19 | 1986-08-21 | 1987-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-19 | 1990-08-21 | 1991-02-20 | $7700.00 | Window Closed / Lapsed |