反应详情

温度

25 °C

A solution of 9.8 g (0.1 mole) maleic anhydride was dissolved in 20 ml water at 50°-60° C. and stirred for 30 minutes while allowing the mixture to cool to 25° C. To this colorless solution at 25° C. was added 26 g of 30% aqueous solution of ammonium hydroxide (0.22 mol NH3) to give a colorless solution. This solution was boiled to dryness over a period of 30 minutes at approximately 100°-120° C. and 10-20 Torr, to give a white crystalline solid. The solid was tumbled under nitrogen at 100 Torr, at 240°-250° C. for 1.5 hours to give a water insoluble, red-brown brittle grasslike solid weighing 9.4 g. This solid was dissolved in 40 g of an aqueous solution containing 3.8 g of sodium hydroxide to form a dear red-brown solution, pH 7.0, containing 25% solids.

1. customto give a colorless solution
2. waitThis solution was boiled to dryness over a period of 30 minutes at approximately 100°-120° C.
3. custom10-20 Torr, to give a white crystalline solid
4. waitThe solid was tumbled under nitrogen at 100 Torr, at 240°-250° C. for 1.5 hours
5. customto form a dear red-brown solution, pH 7.0