Glutaric Acid → Adipic Acid

Participants

Reaction Steps

The mother liquor with the urea-succinic acid adduct removed was treated with the same strongly acidic ion exchange resin as mentioned above to remove urea. Subsequently, 200 g. of methanol was removed and the solution was cooled to and allowed to stand at 15° C. to deposit crude adipic acid. By filtration, 21 g. of crude adipic acid was obtained. The obtained crude adipic acid contained 2.1% by weight of glutaric acid and 1.8% by weight of succinic acid and may be recycled to a purification step in the production of adipic acid to obtain pure adipic acid. The urea adsorbed on the strongly acidic ion exchange resin was desorbed by treating the resin with hot methanol of 50° to 55° C. to be recovered in the form of a methanol solution of urea.

Provenance & Evidence