FIELD: chemistry.
SUBSTANCE: invention relates to method for obtaining tetraoxyalkyl-substituted ureas of general formula (I) where R is -(CH2)8-; -(CH2)10-. Method includes addition of diisocyanate to cooled solution of diethanolamine in chloroform in molar ratio of components 1:2, exposure of obtained mixture, filtration and drying of obtained product under pressure. Solution of diethanolamine with chloroform is preliminarily heated to 30°C, addition of diisocyanate is realised at cooling solution to 10-15°C, exposure of obtained mixture is carried out with mixing first for 1 hour at room temperature, then for 1 hour with heating to 30-35°C, filtration and drying of obtained product is carried out under pressure 0.5-1.5 kPa.
EFFECT: method makes it possible to reduce process duration and expenditures for heating with preservation of high target product output.
2 tbl, 2 ex
Title | Year | Author | Number |
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0 |
|
SU419517A1 | |
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RU2778690C1 |
METHOD FOR PRODUCTION OF 1,1-1,6-HEXAMETHYLENE-3,3,3',3'-TETRAKIS(2-OXYETHYL)-BIS-UREA | 1994 |
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RU2072352C1 |
PROCESS FOR PREPARING PROTEIN FOOD JELLIES | 0 |
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SU925940A1 |
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RU2515955C2 |
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|
RU2196775C2 |
METHOD OF PRODUCING 1,1-1,6-HEXAMETHYLENE-3,3,3',3'-TETRAKIS(2-OXYETHYL)-BIS-UREA | 2008 |
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RU2376284C1 |
METHOD OF OBTAINING DIALKYL ETHERS OF 4,5-DICYANOPHTHALIC ACID | 2013 |
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RU2533121C2 |
METHOD OF PRODUCING POLYURETHANES | 0 |
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SU747432A3 |
Authors
Dates
2016-01-10—Published
2015-01-12—Filed