Patent ID: 8779210
Filing Date: 2014-07-15
Classification: B01D,B01J,C07C,C07F

Abstract:
1. A process for the preparation of 2-methyl-4-(2,6,6-trimethyl-1-cyclohexene-1-yl)-2-butenal (MTCB) which comprises: (1) providing an aqueous mixture comprised of MTCB and a dipolar aprotic compound which is selected from the group consisting of hexamethylphosphorous triamide (HMPT), 1-methyl-2-pyrrolidone (NMP), 1-ethyl-2-pyrrolidone (NEP) and urea derivatives of the following formula: (2) separating MTCB product from the aqueous mixture to form a product stream comprising the MTCB and an aqueous waste stream comprising the dipolar aprotic compound; and (3) treating the aqueous waste stream comprising the dipolar aprotic compound to remove the dipolar aprotic compound therefrom by: