FIELD: chemical industry. SUBSTANCE: original mixture is treated with sufficiently strong acid in aqueous solution, fluorinated carboxylic acid is optionally isolated and subsequently treated with suitable alcohol and the resulting ester is distilled off, and the resulting product is optionally saponified with ammonia solution to ammonium salt of fluorinated carboxylic acid. EFFECT: simplified process and higher purity of the desired product. 6 cl, 4 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF REGENERATING FLUORINATED ALKANE ACIDS FROM WASTE WATERS | 1999 |
|
RU2224721C2 |
| FLUORINE-CONTAINING EMULSIFIER REGENERATION METHOD | 2000 |
|
RU2255807C2 |
| METHOD OF RECOVERING FLUORINATED ALKANE ACIDS FROM WASTE WATERS | 1999 |
|
RU2226186C2 |
| METHOD FOR RECOVERY OF FLUORINE-CONTAINING EMULSIFIER FROM AQUEOUS PHASE | 2000 |
|
RU2248328C2 |
| METHOD OF PREPARING POLYTETRAFLUOROETHYLENE | 1994 |
|
RU2141488C1 |
| METHOD FOR SYNTHESIS OF ALKYL(METH)ACRYLATES | 2006 |
|
RU2409552C2 |
| AQUEOUS DISPERSIONS OF FLUOROPOLYMERS | 1999 |
|
RU2236419C2 |
| METHOD OF PRODUCING METHACRYLIC ACID | 2012 |
|
RU2602080C2 |
| METHOD OF OBTAINING CARBOXYLIC ACID AMIDE FROM CARBONYL COMPOUND AND HYDROCYANIC ACID | 2009 |
|
RU2552619C9 |
| FLUORINE-CONTAINING POLYMER WITH LOW RESIDUAL CONTENT OF FLUORINATED EMULSIFYING AGENT AND METHOD OF PRODUCING SAID POLYMER | 2006 |
|
RU2409592C2 |
