GB796361A - Improvements in or relating to production of trichlorobenzoic acid - Google Patents
Improvements in or relating to production of trichlorobenzoic acidInfo
- Publication number
- GB796361A GB796361A GB30815/55A GB3081555A GB796361A GB 796361 A GB796361 A GB 796361A GB 30815/55 A GB30815/55 A GB 30815/55A GB 3081555 A GB3081555 A GB 3081555A GB 796361 A GB796361 A GB 796361A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bromides
- per cent
- nitric acid
- chlorides
- trichlorotoluenes
- 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
- C07C51/27—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation 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
Trichlorobenzoic acids are produced by the action of nitric acid of less than 90 per cent concentration on the corresponding trichlorobenzyl or benzal chlorides or bromides. The concentration of nitric acid is preferably 60-85 per cent and the temperature at least 95 DEG C., and finely-divided inert material (e.g. fuller's earth) and catalysts (e.g. iodine) may be added. Tables are given of the conversion of mixed isomeric trichlorobenzyl and trichlorobenzal chlorides and bromides, with nitric acid of 70-90 per cent and varying conditions, to give isomeric mixtures of 2 : 3 : 6-, 2 : 3 : 4-, 2 : 3 : 5-, 2 : 4 : 5-, and 2 : 4 : 6-trichlorobenzoic acid, the 2 : 3 : 6- and 2 : 4 : 5- in major proportion. Starting materials. Trichloro - benzyl and -benzal chlorides and bromides are prepared by side-chain halogenation of trichlorotoluenes. The mono- and di-chlorination of an isomeric mixture of trichlorotoluenes are described in detail. The corresponding dibromination is effected with ultra-violet irradiation.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US796361XA | 1954-11-05 | 1954-11-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB796361A true GB796361A (en) | 1958-06-11 |
Family
ID=22151803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB30815/55A Expired GB796361A (en) | 1954-11-05 | 1955-10-27 | Improvements in or relating to production of trichlorobenzoic acid |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE1183901B (en) |
| FR (1) | FR1169539A (en) |
| GB (1) | GB796361A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1139112B (en) * | 1958-07-14 | 1962-11-08 | Heyden Newport Chemical Corp | Process for the production of polychlorobenzoic acids |
-
1955
- 1955-10-27 GB GB30815/55A patent/GB796361A/en not_active Expired
- 1955-11-03 FR FR1169539D patent/FR1169539A/en not_active Expired
- 1955-11-04 DE DEH25377A patent/DE1183901B/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1139112B (en) * | 1958-07-14 | 1962-11-08 | Heyden Newport Chemical Corp | Process for the production of polychlorobenzoic acids |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1169539A (en) | 1958-12-29 |
| DE1183901B (en) | 1964-12-23 |
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