US3923848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing high molecular weight aliphatic carboxylic acids by chromosulfuric acid oxidation of {60 -olefins
Assignee: Hoechst AG
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Filing: 1974-08-19
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Granted: 1975-12-02
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Expires: 1994-08-19
Abstract
Abstract In the oxidation of higher Alpha -olefins by means of chromosulfuric acid the corresponding saturated higher aliphatic monocarboxylic acids are obtained in a high yield, if the oxidation is carried out in the presence of from 2 to 15 % by weight of saturated, aliphatic mono- or dialcohols having from 10 to 40 carbon atoms. The carboxylic acids obtained are suitable for preparing wax-like substances.
Inventors
- 👤 Hans Schmidt
- 👤 Werner Strabberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:31
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
100 words
A PROCESS FOR PREPARING SATURATED, HIGH MOLECULAR WEIGHT, ALIPHATIC MONOCARBOXYLIC ACIDS BY OXIDIZING IN THE MOLTEN STATE A-OLEFINS HAVING FROM 16 TO 70 CARBON ATOMS IN THE MOLECULE OR MIXTURES OF SUCH OLEFINS BY MEANS OF AQUEOUS CHROMO-SULFURIC ACID, WHICH COMPRISES ADDING TO THE MOLTEN OLEFINS OR MIXTURES OF OLEFINS PRIOR TO OXIDIZING FROM 2 TO 15 % BY WEIGHT, CALCULATED ON THE OLEFINS, OF SATURATED ALIPHATIC MONO- OR DIALCOHOLS HAVING FROM 10 TO 40 CARBON ATOMS IN THE MOLECULE, OR THEIR FATTY ACID ESTERS, AND THEN OXIDIZING WITH THE AQUEOUS CHROMOSULFURIC ACID AT A TEMPERATURE OF 60* TO 180*C.
Claim 2
Dependent Claim
100 words
A PROCESS FOR PREPARING SATURATED, HIGH MOLECULAR WEIGHT, ALIPHATIC MONOCARBOXYLIC ACIDS BY OXIDIZING IN THE MOLTEN STATE A-OLEFINS HAVING FROM 16 TO 70 CARBON ATOMS IN THE MOLECULE OR MIXTURES OF SUCH OLEFINS BY MEANS OF AQUEOUS CHROMO-SULFURIC ACID, WHICH COMPRISES ADDING TO THE MOLTEN OLEFINS OR MIXTURES OF OLEFINS PRIOR TO OXIDIZING FROM 2 TO 15 % BY WEIGHT, CALCULATED ON THE OLEFINS, OF SATURATED ALIPHATIC MONO- OR DIALCOHOLS HAVING FROM 10 TO 40 CARBON ATOMS IN THE MOLECULE, OR THEIR FATTY ACID ESTERS, AND THEN OXIDIZING WITH THE AQUEOUS CHROMOSULFURIC ACID AT A TEMPERATURE OF 60* TO 180*C.
Claim 3
Dependent Claim
36 words
The process as claimed in claim 1, wherein the aqueous chromosulfuric acid used is a chromosulfuric acid containing per liter of from 50 to 140 g of CrO3 and from 300 to 650 g of H2SO4.
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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |