FIELD: chemistry.
SUBSTANCE: invention relates to the field of organic chemistry, specifically to the synthesis of the chemical compound 2,4-dichlorophenoxyacetic acid, the organic and inorganic salts and esters of which are well known herbicides. Invention relates to a method including a stage of producing an alkaline earth salt of phenoxyacetic acid by reacting phenol with monochloroacetic acid and an alkaline earth metal oxide in an aqueous medium at a temperature of 90–100 °C, stage of chlorination of the alkaline earth salt of phenoxyacetic acid with a chlorinating agent with the release of a target product.
EFFECT: improved low-waste technology for producing the target product, in which chlorine-substituted phenols and, therefore, dioxins are not formed.
4 cl, 6 ex
| Title | Year | Author | Number |
|---|---|---|---|
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|
RU2757739C1 |
| METHOD OF MAKING ARYL HYDROCARBOXYLIC ACIDS | 2006 |
|
RU2345978C2 |
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|
RU2082711C1 |
| METHOD FOR PRODUCTION OF C - C-ALKYL ESTERS OF CHLORINE-SUBSTITUTED PHENOXYACETIC ACIDS | 1994 |
|
RU2069655C1 |
| 0 |
|
SU256750A1 | |
| METHOD OF PRODUCING CHLORINE-SUBSTITUTED ARYLOXYCARBOXYLIC ACIDS | 2008 |
|
RU2380350C2 |
| METHOD OF ISOLATION OF 2,4-DICHLOROPHENOXYACETIC ACID | 1996 |
|
RU2140900C1 |
| METHOD OF PRODUCING 2-METHYL-4-HALOGEN-PHENOXYACETATES OF TRIS-(2-HYDROXYETHYL)AMMONIUM (2-METHYL-4-HALOGEN-PHENOXYACETOXYPROTATRANES) | 2009 |
|
RU2427568C2 |
| 0 |
|
SU97724A1 | |
| 0 |
|
SU406825A1 |
