Urea → Einecs 256-823-2

Participants

Reaction Steps

35 g. of urea was further added to the mother liquor with the urea-glutaric acid adduct removed and dissolved at 50° C. The resulting solution was then cooled to and allowed to stand at 15° C. for 5 hours to crystallize a urea-succinic acid adduct out of the solution. By filtration, 47 g. of urea-succinic acid adduct (including 21 g. of succinic acid) was obtained. The obtained urea-succinic acid adduct was dissolved in 500 g. of methanol at 30° C. and the resulting solution was treated with AMBERLYST 15 as used in Example 3 to remove urea. After removal of 300 g. of methanol, the solution was cooled to and allowed to stand at 20° C. to precipitate succinic acid. By filtration, 18 g. of succinic acid having a purity of 97.9% was obtained.

Provenance & Evidence