GB723129A - Improvements relating to 2:4-dichloro-5-methylphenoxyacetic acid - Google Patents
Improvements relating to 2:4-dichloro-5-methylphenoxyacetic acidInfo
- Publication number
- GB723129A GB723129A GB184352A GB184352A GB723129A GB 723129 A GB723129 A GB 723129A GB 184352 A GB184352 A GB 184352A GB 184352 A GB184352 A GB 184352A GB 723129 A GB723129 A GB 723129A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- salts
- dichloro
- prepared
- free acid
- 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
- C07C59/00—Compounds having carboxyl groups bound to acyclic carbon atoms and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups
- C07C59/40—Unsaturated compounds
- C07C59/58—Unsaturated compounds containing ether groups, groups, groups, or groups
- C07C59/64—Unsaturated compounds containing ether groups, groups, groups, or groups containing six-membered aromatic rings
- C07C59/66—Unsaturated compounds containing ether groups, groups, groups, or groups containing six-membered aromatic rings the non-carboxylic part of the ether containing six-membered aromatic rings
- C07C59/68—Unsaturated compounds containing ether groups, groups, groups, or groups containing six-membered aromatic rings the non-carboxylic part of the ether containing six-membered aromatic rings the oxygen atom of the ether group being bound to a non-condensed six-membered aromatic ring
- C07C59/70—Ethers of hydroxy-acetic acid, e.g. substitutes on the ring
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention comprises 2,4 - dichloro - 5 - methyl-phenoxyacetic acid and the salts and esters thereof. The free acid may be prepared by condensing monochloro-acetic acid with 2,4-dichloro - 5 - methylphenol in alkaline solution and then acidifying the reaction mixture. The salts and esters of the acid are prepared by the usual methods. The ester may be the methyl, ethyl, propyl or isopropyl ester. The sodium, potassium and ammonium salts are referred to as well as amine salts, e.g. derived from di- and tri-methylamine, di- and tri-ethylamine, monoisopropylamine, and di- and tri-ethanolamine. In the examples, the free acid, its sodium and diethylamine salts and its isopropyl ester are prepared. p 2,4-Dichloro-5-methylphenol is prepared by chlorinating m-cresol with chlorine or sulphuryl chloride.ALSO:A herbicidal composition comprises 2,4 -dichloro-5-methylphenoxyacetic acid, or a salt or ester thereof, and a diluent. The composition may be in the form of a solution e.g., an aqueous solution of one of the salts, or a dispersion e.g., an aqueous dispersion of one of the esters made up with the aid of a dispersing agent. A solid diluent may be used with the free acid or its sodium salt. A preferred composition is obtained by dissolving the acid or an ester thereof in an organic solvent with a dispersing agent, and water then is added to form an aqueous dispersion. Sodium, potassium, ammonium and amine salts such as those derived from di- and trimethylamine, di- and tri-ethylamine, di- and triethanolamine and isopropylamine are referred to. Suitable esters are the methyl, ethyl, propyl and isopropyl esters. In the examples the following compositions are prepared: an aqueous solution of the free acid and of its diethylamine salt, an aqueous dispersion of the free acid with sulphonated castor oil and with a detergent, a mixture of the free acid and talc, a mixture of the isopropyl ester, pentachlorophenol, a liquid hydrocarbon and a dispersing agent, and a mixture of the isopropyl ester and a commercial mixture of alkylnaphthalenes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB184352A GB723129A (en) | 1952-12-30 | 1952-12-30 | Improvements relating to 2:4-dichloro-5-methylphenoxyacetic acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB184352A GB723129A (en) | 1952-12-30 | 1952-12-30 | Improvements relating to 2:4-dichloro-5-methylphenoxyacetic acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB723129A true GB723129A (en) | 1955-02-02 |
Family
ID=9728974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB184352A Expired GB723129A (en) | 1952-12-30 | 1952-12-30 | Improvements relating to 2:4-dichloro-5-methylphenoxyacetic acid |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB723129A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4035416A (en) * | 1972-11-02 | 1977-07-12 | The Dow Chemical Company | Process for making phenoxyalkanoic acids |
-
1952
- 1952-12-30 GB GB184352A patent/GB723129A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4035416A (en) * | 1972-11-02 | 1977-07-12 | The Dow Chemical Company | Process for making phenoxyalkanoic acids |
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