Maleic Anhydride → 44742-89-4
Reaction equation
[C:1]1(=[O:7])[O:6][C:4](=[O:5])[CH:3]=[CH:2]1.[OH-:8].[NH4+:9].[OH-].[Na+]>O>[C:1]([O-:6])(=[O:7])/[CH:2]=[CH:3]\[C:4]([OH:8])=[O:5].[NH4+:9]Participants
Reactant 3
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 25 °C
Procedure
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.
Workup
- customto give a colorless solution
- waitThis solution was boiled to dryness over a period of 30 minutes at approximately 100°-115° C.
- customto give a white crystalline solid
- waitThe solid was tumbled under nitrogen at 100 Torr, at 145°-150° C. for 4 hours
- customto form a clear red-brown solution, pH 7.0
Sources & evidence
- ORD record
- ord-1f2732522819437ea467ba51fd821d87
- Source dataset
- uspto-grants-1994_02
- Patent number
- US05288783
Reaction notes
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