反应详情

温度

75 °C

1315 g of a 40% strength aqueous sodium sarcosinate solution (pH 14) were introduced into a 2 1 three-necked flask having a mechanical stirrer, heating bath, reflux condenser and gas inlet tube and the mixture was adjusted to pH 9 by introduction of carbon dioxide gas. After heating the solution to 75° C., 338 g of a 50% strength aqueous cyanamide solution were added in the course of 4 hours. The temperature was kept constant at 75° C. during the entire addition period. The pH remained between 9 and 10 without introduction of further CO2 gas. After the addition of cyanamide, the reaction solution was stirred for 2 hours and then cooled to 35° C. The precipitated creatine was filtered off, washed with water and dried. 480 g of creatine monohydrate having a crystal yield of 75% were obtained.

1. temperatureheating bath
2. temperaturereflux condenser and gas inlet tube
3. additionThe temperature was kept constant at 75° C. during the entire addition period
4. temperaturecooled to 35° C
5. filtrationThe precipitated creatine was filtered off
6. washwashed with water
7. customdried