FIELD: chemistry.
SUBSTANCE: method of producing difluoroacetic acid involves reacting an ester of difluoroacetic acid with an aliphatic carboxylic acid, which enables to form, as a result of a transesterification reaction, difluoroacetic acid and an ester of a corresponding carboxylic acid. The carboxylic acid is selected such that the ester of said carboxylic acid has a boiling point lower than that of difluoroacetic acid. The molar ratio of the ester of difluoroacetic acid to the aliphatic carboxylic acid varies from 0.8 to 1.2. The ester of said carboxylic acid is removed as it is formed by distillation in order to separate difluoroacetic acid.
EFFECT: method enables to obtain an end product of high purity.
13 cl, 3 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR CLEANING DERIVATIVE OF ACRYLIC ACID | 2016 |
|
RU2676308C1 |
| METHOD FOR OBTAINING HIGHER ALKYL ETHERS OF (4-AMINO-3,5-DICHLORO-6-FLUORO-2-PYRIDINYLOXY) ACETIC ACID | 0 |
|
SU1836348A3 |
| METHOD FOR OBTAINING ALCOXY-HYDROXYBENZALDEHYDE, THAT IS SUBSTANTIALLY FREE OF ALKYL-ALCOXY-HYDROXYBENZALDEHYDE | 2013 |
|
RU2648044C2 |
| COATING COMPOSITION INCLUDING BICYCLO- OR SPIRO-ORTHO-ESTER FUNCTIONAL COMPOUND | 1997 |
|
RU2180674C2 |
| METHOD OF PRODUCING ε-CAPROLACTONE AND 1,6-HEXANEDIOL | 2011 |
|
RU2571082C2 |
| METHOD OF OBTAINING MIXTURE OF LACTIDE DERIVATIVES | 2009 |
|
RU2541567C2 |
| METHOD OF OBTAINING ISOCYANATES WITH APPLICATION OF DIARYLCARBONATE | 2008 |
|
RU2523201C2 |
| METHOD OF OBTAINING CARBOXYLIC ACID AMIDE FROM CARBONYL COMPOUND AND HYDROCYANIC ACID | 2009 |
|
RU2552619C9 |
| METHOD OF PREPARING POLYETHERPOLYOLS WITH TWO TERMINAL HYDROXYL GROUPS | 1996 |
|
RU2162862C2 |
| METHOD OF PRODUCING DIALKYL ETHER OF NAPHTHALENE DICARBOXYLIC ACID (VERSIONS) | 2005 |
|
RU2397158C2 |
