FIELD: chemistry.
SUBSTANCE: invention relates to a method of purifying para-dioxanone by treating a mixture containing para-dioxanone and/or poly(para-dioxanone) and/or oxyethoxyacetic acid with an alkali solution based on the acid number. The obtained beta-hydroxyethoxyacetic acid salt is extracted via crystallisation in 1-4 steps and treated with an aqueous solution of an inorganic acid, washed with acetone and dried. The formed beta-hydroxyethoxyacetic acid is extracted with acetone and distilled in a vacuum to form para-dioxanone. Para-dioxanone is a valuable monomer for synthesis of biodegradable polymers.
EFFECT: method enables to purify para-dioxanone synthesised with any method and enables to obtain para-dioxanone with purity of 99,99% and output of 75-84%.
1 tbl, 7 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF P-DIOXANONE PREPARATION | 0 |
|
SU1700001A1 |
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|
SU1018951A1 |
| (5-HYDROXY-3,4-BIS(HYDROXYMETHYL)-6-METHYLPYRIDIN-2-YL)METHANESULPHONIC ACID SALT AND A METHOD FOR PRODUCTION THEREOF | 2019 |
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| METHOD FOR PREPARING BENZOPYRAN-2-OL DERIVATIVES | 2007 |
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| METHOD FOR PRODUCING (2R,3R,4R,5S)-1-BUTYL-2-(HYDROXYMETHYL)PIPERIDINE-3,4,5-TRIOL | 2020 |
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RU2762605C1 |
| DERIVATIVES OF 7-OXO-1,6-DIAZABICYCLO[3.2.1]OCT-3-ENE, USEFUL FOR BACTERIAL INFECTIONS TREATMENT | 2013 |
|
RU2645678C2 |
| METHOD OF SYNTHESIS OF PARA-DIOXANONE | 1992 |
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RU2042672C1 |
