NL7100724A - Prodn of alkyladipic acids by oxadation of - alkylcyclohexanol with hno3 - Google Patents
Prodn of alkyladipic acids by oxadation of - alkylcyclohexanol with hno3Info
- Publication number
- NL7100724A NL7100724A NL7100724A NL7100724A NL7100724A NL 7100724 A NL7100724 A NL 7100724A NL 7100724 A NL7100724 A NL 7100724A NL 7100724 A NL7100724 A NL 7100724A NL 7100724 A NL7100724 A NL 7100724A
- Authority
- NL
- Netherlands
- Prior art keywords
- hno3
- trialkyladipic
- gamma
- alpha
- acids
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
- C07C51/31—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation of cyclic compounds with ring-splitting
- C07C51/316—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation of cyclic compounds with ring-splitting with oxides of nitrogen or nitrogen-containing mineral acids
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
alpha, alpha, gamma- and alpha, gamma, gamma-isomers of trialkyladipic acids are prepd. by reacting trialkylcyclohexanol at a temperature below 65 degrees C with HNO3 and an initial concentration of moer than 65% in a ratio HNO3/organic material of not more than 3.5:1 but using at least the stoichiometric quantity of HNO3. The mixture must then be cooled until trialkyladipic acid crystallises. The pref. reaction temp. is 40-50 degrees C and the HNO3 used for the oxidation contain esp. trialkyladipic acid, esp. by using recycled acid. The reaction products may be used as starting materials in the preparation of polyamides. The process may be carried out on technical scale with very high yields and purity.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL717100724A NL143896B (en) | 1959-07-25 | 1971-01-19 | PROCESS FOR THE PREPARATION OF THE ALFA, ALFA, GAMMA AND ALFA, GAMMA, GAMMA, ISOMERS OF TRIALKYLADIPIC ACIDS. |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB54181A DE1111163B (en) | 1959-07-25 | 1959-07-25 | Process for the preparation of mixtures from ª ‡, ª ‡, ª † - and ª ‡, ª †, ª † -trimethyladipic acid |
DEB0054955 | 1959-09-26 | ||
DE1959B0056111 DE1418074B2 (en) | 1959-07-25 | 1959-12-31 | METHOD FOR MANUFACTURING TRIMETHYLADIPIC ACIDS |
NL254152 | 1960-07-25 | ||
NL717100724A NL143896B (en) | 1959-07-25 | 1971-01-19 | PROCESS FOR THE PREPARATION OF THE ALFA, ALFA, GAMMA AND ALFA, GAMMA, GAMMA, ISOMERS OF TRIALKYLADIPIC ACIDS. |
Publications (2)
Publication Number | Publication Date |
---|---|
NL7100724A true NL7100724A (en) | 1971-05-25 |
NL143896B NL143896B (en) | 1974-11-15 |
Family
ID=27436584
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL717100724A NL143896B (en) | 1959-07-25 | 1971-01-19 | PROCESS FOR THE PREPARATION OF THE ALFA, ALFA, GAMMA AND ALFA, GAMMA, GAMMA, ISOMERS OF TRIALKYLADIPIC ACIDS. |
Country Status (1)
Country | Link |
---|---|
NL (1) | NL143896B (en) |
-
1971
- 1971-01-19 NL NL717100724A patent/NL143896B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
NL143896B (en) | 1974-11-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NL80 | Abbreviated name of patent owner mentioned of already nullified patent |
Owner name: VEBA |
|
V4 | Lapsed because of reaching the maximum lifetime of a patent |