Maleic Anhydride → 44742-89-4

Participants

Reaction Conditions

Reaction Steps

Following the examples of U.S. Pat. No. 4,839,461, a slurry of 9.8 g (0.1 mole) maleic anhydride was dissolved in 20 ml water at 80°-95° C. and stirred for 30 minutes while allowing the mixture to cool to 25° C. To this colorless solution at 25° C. was added 13 g of 30% aqueous solution of ammonium hydroxide (0.11 mol NH3 ) to give a colorless solution. This solution was boiled to dryness over a period of 30 minutes at approximately 100°-115° C. to give a white crystalline solid. The solid was tumbled under nitrogen at 100 Torr, at 145°-150° C. for 4 hours to give a water insoluble, pinkish-tan brittle glasslike solid weighing 11.4 g. This solid was dissolved in 26.2 g of an aqueous solution containing 1.36 g of sodium hydroxide to form a clear red-brown solution, pH 7.0, containing 25% solids.

Provenance & Evidence