Process for producing diesterdiamides

Details Process for producing diesterdiamides Process for producing diesterdiamides

C - Chemistry, Metallurgy

07

C

260/473.5

C07C 231/02 (2006.01)

Patent

CA 1172650

CASE 1246 PROCESS FOR PRODUCING DIESTERDIAMIDES ABSTRACT OF THE DISCLOSURE Process for preparing diesterdiamides, consisting of reacting a diester with a diamine under wet conditions in the presence of suitable solvents and catalysts, to give the diester diamide, together with an ester salt derivative as impurity. The reaction product is then filtered to give a diesterdiamide cake and a mother solution of the reagents which also contains the solvent, the catalyst and the ester salt product. The cake is washed with a solvent of the ester salt, which also dissolves the reagents and catalysts. rhe mother solution and wash solution are then distilled, the two fractions obtained being recycled to the synthesis and to the wash.

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