GB1262051A - Method of obtaining benzenoid tri-ortetracarboxylic acids - Google Patents
Method of obtaining benzenoid tri-ortetracarboxylic acidsInfo
- Publication number
- GB1262051A GB1262051A GB1419470A GB1419470A GB1262051A GB 1262051 A GB1262051 A GB 1262051A GB 1419470 A GB1419470 A GB 1419470A GB 1419470 A GB1419470 A GB 1419470A GB 1262051 A GB1262051 A GB 1262051A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tri
- tetra
- acids
- oxides
- vapour
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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
- C07C51/21—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen
- C07C51/255—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting
- C07C51/265—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting having alkyl side chains which are oxidised to carboxyl groups
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
1,262,051. Benzene tri- or tetra-carboxylic acids. ORDENA TRUDOVOGO KRASNOGO ZNAMENI INSTITUT KHIMICHESKIKH NAUK AKADEMII NAUK KAZAKHOSKOI SSR. 24 March, 1970 [25 March, 1969], No. 14194/70. Heading C2C. Benzene tri- or tetra-carboxylic acids are obtained by oxidizing tri- or tetra-alkylbenzenes or the derivatives thereof with a heteroatom in the side chain with O 2 or an O 2 -containing gas in the vapour phase in the presence of NH 3 and H 2 O vapour in a molar ratio of alkylbenzenes, O 2 or O 2 -containing gas, NH 3 and H 2 O vapour equal to 1 : 20 : 5 : 30 to 1 : 100 : 40 : 100, respectively, in the presence of catalysts consisting of vanadium oxides modified by the oxides of Sn, Ti, Bi or Mo at a molar ratio of vanadium oxides to the modifying oxides equal to 1 : 0À5 to 8 and a temperature of from 350‹ to 440‹ C., hydrolysing the resulting nitriles, imides, cyanimides or mixtures thereof with 2-10% aqueous solutions of acids or alkalis at a temperature from 60‹ to 100‹ C. Examples are given for the production of trimellitic acid and pyromellitic acid. 4-Cyanophthalimide and pyromellitediimide are obtained as intermediates.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1313364A SU282310A1 (en) | 1969-03-25 | 1969-03-25 | METHOD OF OBTAINING AROL ^ ATHIC TRI- OR TETRACARBONIC ACIDS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1262051A true GB1262051A (en) | 1972-02-02 |
Family
ID=20445008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1419470A Expired GB1262051A (en) | 1969-03-25 | 1970-03-24 | Method of obtaining benzenoid tri-ortetracarboxylic acids |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB1262051A (en) |
| SU (1) | SU282310A1 (en) |
-
1969
- 1969-03-25 SU SU1313364A patent/SU282310A1/en active
-
1970
- 1970-03-24 GB GB1419470A patent/GB1262051A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| SU282310A1 (en) | 1973-11-05 |
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