公开(公告)号：US20180057438A1

公开(公告)日：2018-03-01

申请号：US15687608

申请日：2017-08-28

Applicant: NAN YA PLASTICS CORPORATION

Inventor： Te-Chao LIAO ,  Jung-Jen CHUANG ,  Chung-Yu CHEN ,  Chia-Ruey TSAI ,  Sung-Chieh CHAO

IPC: C07C45/62 ,  C07C45/79 ,  B01J23/44 ,  B01J21/18 ,  B01J35/00 ,  B01J35/02

CPC classification number: C07C45/62 ,  B01J21/18 ,  B01J23/44 ,  B01J35/0006 ,  B01J35/026 ,  B01J35/1023 ,  B01J35/1028 ,  C07C45/79 ,  C07C47/02

Abstract: A process for producing 2-ethylhexanal involves performing reaction using a reaction tank equipped with a gas-introducing mixer having extracting, exhausting, and stirring functions in the presence of a palladium on carbon catalyst having a carbon carrier with lower impurity content and higher specific surface area for hydrogenation, and introducing hydrogen gas evenly into reaction liquid; resulted in that the process minimizes operational pressure for hydrogenation and increases a yield of 2-ethylhexanal at least up to 98.0%.

公开(公告)号：US20180346398A1

公开(公告)日：2018-12-06

申请号：US15990871

申请日：2018-05-29

Applicant: NAN YA PLASTICS CORPORATION

Inventor： Te-Chao LIAO ,  Jung-Jen CHUANG ,  Chung-Yu CHEN ,  Chia-Ruey TSAI ,  Sung-Chieh CHAO

IPC: C07C29/20 ,  B01J23/46

Abstract: A hydrogenation method for preparing HBPA includes placing a BPA reaction liquid into a hydrogenation vessel with a hollow-shaft stirrer installed inside; starting the hollow-shaft stirrer to stir the BPA reaction liquid and simultaneously allowing hydrogen gas evenly distributed over and contact well with the BPA reaction liquid; in the presence of a single-metallic Ru/Al2O3 hydrogenation catalyst to proceed with a catalytic hydrogenation at low temperature and low pressure to produce HBPA, the HBPA has a yield of 99.7% or more, and particularly having a trans/trans isomer ratio above 63%.

公开(公告)号：US20220242813A1

公开(公告)日：2022-08-04

申请号：US17398003

申请日：2021-08-10

Applicant: NAN YA PLASTICS CORPORATION

Inventor： Te-Chao LIAO ,  Jung-Jen CHUANG ,  Chung-Yu CHEN ,  Hsun-Min LIN

IPC: C07C67/08 ,  C08K5/12

Abstract: A method for preparing a low migration plasticizer of di-2-ethylhexyl phthalate is provided. The method includes a step of adding at least one short chain alcohol component and at least one long chain alcohol component in an esterification reaction between terephthalic acid and 2-ethylhexanol, so as to graft modify a resulting di-2-ethylhexyl phthalate. The esterification reaction is carried out under a temperature from 30° C. to 225° C. and a pressure from 80 mbar to 1033 mbar.

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%.