公开(公告)号：US09776955B2

公开(公告)日：2017-10-03

申请号：US15355103

申请日：2016-11-18

Applicant: NAN YA PLASTICS CORPORATION

Inventor： Te-Chao Liao ,  Jung-Jen Chuang ,  Zhi-Ming Huang ,  Shun-Chi Chen ,  Tzu-Chiang Lin

IPC: C07C253/18

CPC classification number: C07C253/18 ,  C07C253/30 ,  C07C255/24

Abstract: A method for preparing N,N′-bis(2-cyanoethyl-1,2-ethylenediamine involves using glycol ether as a catalyst for synthesis reaction in which ethylenediamine and acrylonitrile at a molar ratio of 1:1.9-2.1 are reactant that react at 20-70°C to prepare N,N′-bis(2-cyanoethyl)-1,2-ethylenediamine; the method improves the yield to 98.15-98.98%; and the used glycol ether may be filtered and recycled, thereby saving costs and reducing environmental pollution.

公开(公告)号：US09776956B2

公开(公告)日：2017-10-03

申请号：US15355108

申请日：2016-11-18

Applicant: NAN YA PLASTICS CORPORATION

Inventor： Te-Chao Liao ,  Jung-Jen Chuang ,  Zhi-Ming Huang ,  Shun-Chi Chen ,  Tzu-Chiang Lin

IPC: C07C253/18

CPC classification number: C07C253/18 ,  C07C253/30 ,  C07C255/24

Abstract: A method for preparing N,N′-bis(2-cyanoethyl)-1,2-ethylenediamine involves using strongly acidic cation exchange resin as a catalyst for synthesis, and is advantageous for not only eliminating the need of distillation for purification and thereby reducing reaction time, but also improving the yield of N,N′-bis(2-cyanoethyl)-1,2-ethylenediamine to 97.70-98.08%; and the method benefits simplified process and reduced costs and helps to save water significantly, thereby minimizing environmental pollution.