Patent ID: 7605297
Filing Date: 2009-10-20
Classification: C07B,Y02P

Abstract:
1. A process for the extractive removal of optionally substituted phenol, 3-hydroxypyrazole, 2-hydroxypyridine, hydroquinone, resorcinol, catechol; C 1 -C 20 -alcohol, glycol, glycerol, optionally substituted aniline, N—C 1 -C 20 -alkylamine, N,N-di-C 1 -C 20 -alkylamine, P—C 1 -C 20 -alkylphosphine, P,P-di-C 1 -C 20 -alkylphosphine, phenylphosphine, diphenylphosphine, hydrazine, hydroxylamine, sulfonic acid, sulfinic acid, phosphoric acid, carboxylic acid or amino acid from aprotic solvents by means of ionic liquids of the formula [K] n + [A] n− , where n is 1, 2 or 3; [K]+ is selected from the group consisting of: [A]