反应详情

温度

10 °C

In 300 g of water was dispersed 0.5 mol of sodium pyrophosphate. The dispersion was cooled to 10° C., and 1 mol of hydrochloric acid was added thereto. To the dispersion was added 0.5 mol of piperazine (purity: 97%) dissolved in 800 g of water at 20° C. or lower, whereupon a white solid precipitated. The reaction system was stirred at 10° C. for 3 hours. The white solid was collected by filtration and washed with water. To the filtrate was added 300 g of methanol, and the thus precipitated white solid was collected by filtration and washed with methanol and water. The combined white solid was dried to give 0.23 mol of piperazine pyrophosphate as a white powder.

1. customlower, whereupon a white solid precipitated
2. filtrationThe white solid was collected by filtration
3. washwashed with water
4. additionTo the filtrate was added 300 g of methanol
5. filtrationthe thus precipitated white solid was collected by filtration
6. washwashed with methanol and water
7. customThe combined white solid was dried