FIELD: chemistry.
SUBSTANCE: invention claims a method of obtaining low-molecular N-polyvinylpyrrolidone by polimerisation of water N-vinylpyrrolidone solution in the presence of 30% hydrogen peroxide solution and 25% ammonia solution in isothermal mode at 70-75°C. The mix of N-vinylpyrrolidone, hydrogen peroxide and ammonium solutions are gradually fed to water heated to 75°C for less than 30 minutes. The claimed method allows obtaining low-molecular N-polyvinylpyrrolidone at conversion rate of 85%.
EFFECT: reduced quantity of byproducts.
1 tbl, 5 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PRODUCING POLYVINYL PYRROLIDONE | 2007 |
|
RU2374268C2 |
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|
RU2607598C1 |
| 0 |
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SU499274A1 |
