FIELD: chemical technology.
SUBSTANCE: invention relates to a method for synthesis of symmetric di-(polyfluoroalkyl) esters of the formula: [H(CF2)nCH2]2O (wherein n = 2, 4, 6) from corresponding polyfluorinated alcohols in the presence of N,N-dimethylformamide as a catalyst. Method involves mixing reagents at temperature (-15)-(-10)0C followed by their interaction wherein mixture of polyfluorinated alcohol with catalyst interacts with thionyl chloride in the mole ratio of reagents = 1:(0.005-0.009):(1-1.1), respectively, at step-by-step increase of temperature: firstly at 20-300C for 1-2 h and then at 30-500C for 3-6 h, and evolving sulfur dioxide and hydrogen chloride are blown off with inert gas. Method provides synthesis of symmetric di-(polyfluoroalkyl) esters with high yield for a single step.
EFFECT: improved method of synthesis.
1 tbl, 3 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF OBTAINING SIMPLE POLYFLUOROALKYL ETHERS | 2007 |
|
RU2346926C1 |
| METHOD FOR PREPARING POLYFLUORINATED ALKYL CHLOROSULFITES | 2003 |
|
RU2247110C1 |
| METHOD OF PRODUCING OLIGO- AND POLYETHYLENE TEREPHTHALATES | 2013 |
|
RU2519827C1 |
| METHOD OF PRODUCING CATALYST FOR SYNTHESIS OF OLIGO- AND POLYETHYLENE TEREPHTHALATES AND METHOD OF PRODUCING OLIGO- AND POLYETHYLENE TEREPHTHALATES | 2013 |
|
RU2523800C1 |
| METHOD OF MODIFYING SURFACE OF POLYETHYLENE TEREPHTHALATE POWDER | 2013 |
|
RU2550382C1 |
| 0 |
|
SU424855A1 | |
| METHOD FOR OBTAINING OF ORGANOMODIFIED MONTMORILLONITE WITH POLYFLUOROALKYL GROUPS | 2016 |
|
RU2629300C1 |
| FLUORINATED POLYAMIDE COMPOSITION WITH REDUCED COMBUSTIBILITY | 2016 |
|
RU2641931C1 |
| FLUORINE-CONTAINING POLYAMIDE COMPOSITION WITH REDUCED COMBUSTIBILITY | 2016 |
|
RU2637955C1 |
| METHOD FOR MODIFICATION OF POLYETHYLENETEREPHTHALATE THREAD SURFACE | 2014 |
|
RU2574258C1 |
