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ChemicalBook CAS DataBase List 1,1-DIMETHYLUREA
598-94-7

1,1-DIMETHYLUREA synthesis

11synthesis methods
-

Yield:-

Reaction Conditions:

in waterHeating;

Steps:

1
In the with mechanical stirrer, a thermometer and a reflux condenser of the three neck round bottom flask is added 390 g (6 μM) of sodium sulfocyanate and 150 ml of purified water to stir at the same time heating, then adding 676 g (6 μM, 753 ml) 40% dimethylamine aqueous solution mixed, constant temperature continuously stirring 2 - 3 hours after the termination of the reaction such as, concentrated under reduced pressure, cooling crystallization, centrifugal separation, water recrystallization and vacuum dried to obtain 325 g of 1, 1 - [...] white crystalline powder, melting point 175 - 180 °C, content of 95.3%.

References:

Dongli (Nantong) Chemical Co., Ltd.;Ayibieke . Malike;A Yibieke·malike;Yi Weinan;Zhou Jian CN109956891, 2019, A Location in patent:Paragraph 0008-0013

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