FIELD: organic chemistry, chemical technology.
SUBSTANCE: invention relates to a method for preparing 4,4'-azobis-(4-cyanopentanol) used as an initiating agent in radical polymerization reaction. Method involves interaction of acetopropyl alcohol with hydrocyanic acid or its salts and hydrazine derivatives followed by oxidation of synthesized 4,4'-hydrazobis-(4-cyanopentanol) in acid medium. Oxidation is carried out in aqueous or aqueous-organic medium at temperature from 50C to 250C and at pH value of reaction mass 1-4 in the presence of bromine or bromine compounds or iodine with hydrogen peroxide or alkaline or earth-alkaline metal hypochlorite. Oxidation with hydrogen peroxide is carried out in the presence of catalysts among the group of tungsten, vanadium or molybdenum compounds. Method provides improving sanitary-ecological indices in manufacturing and to reduce energy consumption.
EFFECT: improved preparing method.
26 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR PREPARING 4,4'-AZOBIS-(4-CYANOPENTANOIC ACID) | 2002 |
|
RU2243213C2 |
| METHOD OF PRODUCING 4,4'-AZO-BIS-(4-CYAN PENTANOL) | 0 |
|
SU676587A1 |
| METHOD FOR PREPARING 2,2'-AZOBIS-ISOBUTYRONITRILE | 2002 |
|
RU2243211C2 |
| METHOD OF PREPARING 4,4'-AZOBIS-(1-BROMO-4-CYANOPENTANE) | 0 |
|
SU743992A1 |
| METHOD OF SYNTHESIS OF AZOBISFORMAMIDE | 1999 |
|
RU2177939C2 |
| 0 |
|
SU484684A3 | |
| PROCESS FOR PRODUCING CIS- AND TRANS-ISOMERS OF SUBSTITUTED DIHALOVINYLCYCLOPROPANECARBOXYLIC ACIDS OR THEIR ESTERS | 0 |
|
SU940644A3 |
| 0 |
|
SU286642A1 | |
| ESTERS OF SUBSTITUTED 4,6,6,6-TETRAHALODIHEXANOIC ACID AS INTERMEDIATE COMPOUNDS FOR PRODUCING DIHALOVINYLCYCLOPROPANE CARBOXYLATES | 0 |
|
SU969700A1 |
| METHOD OF PRODUCING LOW-MOLECULAR POLYMERS WITH END HYDROXYL GROUPS | 0 |
|
SU995497A1 |
