公开(公告)号：US20170362159A1

公开(公告)日：2017-12-21

申请号：US15615890

申请日：2017-06-07

Applicant: NAN YA PLASTICS CORPORATION

Inventor： Te-Chao LIAO ,  Jung-Jen CHUANG ,  Cheng-Hsun CHEN ,  Chia-Ruey TSAI ,  Chung-Yu CHEN

IPC: C07C55/10 ,  B01F7/00 ,  C07C51/43 ,  C07C31/02

CPC classification number: C07C55/10 ,  B01F7/00541 ,  C07B2200/13 ,  C07C31/02 ,  C07C51/43

Abstract: A method for crystallizing succinic acid includes agitating a succinic acid reaction solution with a jet-flow agitator that is rotated at low speed and has a low volume power density; compared with the conventional agitators, the jet-flow agitator helps increase the uniformity of succinic acid particles, shorten the time required for crystallizing succinic acid, and raise the yield of the crystallized succinic acid as well as purity of crystallized succinic acid having a purity of 99.8-99.9%.

公开(公告)号：US20170152212A1

公开(公告)日：2017-06-01

申请号：US15355111

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: C07C209/68

CPC classification number: C07C209/68 ,  C07C209/48 ,  C07C211/14

Abstract: A method for preparing N,N′-bis(3-aminopropyl)-1,2-ethylenediamine uses a glycol ether based solution, such as a solution containing dipropylene glycol dimethyl ether (PM) to replace the traditionally used monol-based solvents, and performs hydrogenation in the presence of a Co—Mn—Al catalyst. The method improves the yield of N,N′-bis(3-aminopropyl)-1,2-ethylenediamine to 98.85-99.49% and effectively suppresses generation of by-products.