GB897801A - Process for the production of benzene carboxylic acids - Google Patents
Process for the production of benzene carboxylic acidsInfo
- Publication number
- GB897801A GB897801A GB3325660A GB3325660A GB897801A GB 897801 A GB897801 A GB 897801A GB 3325660 A GB3325660 A GB 3325660A GB 3325660 A GB3325660 A GB 3325660A GB 897801 A GB897801 A GB 897801A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- xylene
- benzene
- carboxylic acids
- benzene carboxylic
- 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)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Benzene carboxylic acids, anhydrides or mixtures thereof are prepared by liquid phase oxidation, with molecular oxygen at an elevated temperature in presence of an oxidation catalyst and gamma-butyrolactone as solvent, of benzene derivatives, optionally nuclear-substituted by chlorine or carboxyl, which contain 1-3 C1-3 side chains selected from alkyl monochloralkyl, dichloroalkyl and hydroxyalkyl groups. In examples, benzoic acid is obtained from toluene or benzyl alcohol, terephthalic acid from p-xylene, p-cymene or p-toluic acid, isophthalic acid from m-xylene, p-chlorobenzoic acid from p-chlorotoluene and phthalic anhydride from o-xylene, using promoters selected from Co 2-ethylhexanoate + NH4Br or isobutyraldehyde, Cr (III) nitrate + Co (II) phosphate, and NH4VO3 + NaBr. Other specified starting materials are: trimethylbenzene, cumene, diisopropyl benzene, chloromethylbenzene xylyl chloride and xylylidene and xylylene dichlorides. Specifications 737,439, 762,849 and 798,342, also U.S.A. Specification 2,245,528 and German Specification 767,366 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB0054972 | 1959-08-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB897801A true GB897801A (en) | 1962-05-30 |
Family
ID=6970811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3325660A Expired GB897801A (en) | 1959-08-29 | 1960-09-28 | Process for the production of benzene carboxylic acids |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB897801A (en) |
-
1960
- 1960-09-28 GB GB3325660A patent/GB897801A/en not_active Expired
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