Sodium Hydroxide → Ammonium fumarate

A slurry of 11.6 g (0.1 mole) fumaric acid was dissolved in 30 ml water was mixed with 26 g of 30% aqueous solution of ammonium hydroxide (0.22 mol NH3). Carefully warming the slurry to boiling gave a clear solution. This solution was boiled to dryness over a period of 15 minutes to give a white crystalline solid. The solid was tumbled under nitrogen at 100 Torr, at 140°-150° C. for 8 hours to give a water insoluble, brown, glasslike solid weighing 14 g. This solid was dissolved in 100 g of an aqueous solution containing 2.0 g of sodium hydroxide to form a pale yellow solution, pH 7.0, containing 25% solids.

1. temperatureCarefully warming the slurry
2. customto boiling gave a clear solution
3. customto give a white crystalline solid
4. waitThe solid was tumbled under nitrogen at 100 Torr, at 140°-150° C. for 8 hours
5. customto form a pale yellow solution, pH 7.0

ORD record

ord-a4a987af421843bc9bf7cf93577023e5

Source dataset

uspto-grants-1998_06

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05773565