公开(公告)号：US20160016151A1

公开(公告)日：2016-01-21

申请号：US14869138

申请日：2015-09-29

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Dong Won HWANG ,  Jong-San CHANG ,  Pravin P. UPARE ,  U-Hwang LEE ,  Young Kyu HWANG

IPC: B01J23/14 ,  C07D319/12 ,  C01G19/02

CPC classification number: B01J23/14 ,  B01J21/04 ,  B01J21/063 ,  B01J21/066 ,  B01J21/08 ,  B01J29/0308 ,  B01J29/405 ,  B01J29/7057 ,  B01J35/0006 ,  B01J35/002 ,  B01J37/031 ,  B01J37/035 ,  C01G19/02 ,  C07D319/10 ,  C07D319/12

Abstract: The present invention provides a method for directly producing lactide by subjecting lactic acid to a dehydration reaction in the presence of a catalyst comprising a tin compound, preferably, a tin (IV) compound, wherein lactide can be produced directly or by one step from lactic acid, without going through the step of producing or separating lactic acid oligomer. The method of the present invention has advantages of causing no loss of lactic acid, having a high conversion ratio to lactic acid and a high selectivity to optically pure lactide, and maintaining a long life time of the catalyst. Further, since lactic acid oligomer is not or hardly generated and the selectivity of meso-lactide is low, the method also has an advantage that the cost for removing or purifying this can be saved.

公开(公告)号：US20160158708A1

公开(公告)日：2016-06-09

申请号：US14959152

申请日：2015-12-04

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： U-Hwang LEE ,  Jong San CHANG ,  Young Kyu HWANG ,  You In PARK ,  Hye Rim SONG ,  Seung Eun NAM ,  Do Young HONG ,  Sue Kyung LEE ,  Kyung Ho CHO

IPC: B01D69/12 ,  B01D53/22 ,  B01J20/28 ,  B01J20/26 ,  B01J20/22

CPC classification number: B01D53/22 ,  B01D53/228 ,  B01D67/0079 ,  B01D69/02 ,  B01D69/148 ,  B01D2053/221 ,  B01D2256/10 ,  B01D2256/12 ,  B01D2256/16 ,  B01D2256/22 ,  B01D2256/245 ,  B01D2257/102 ,  B01D2257/104 ,  B01D2257/108 ,  B01D2257/2047 ,  B01D2257/30 ,  B01D2257/504 ,  B01J20/226 ,  B01J20/262 ,  B01J20/28033 ,  Y02C10/10

Abstract: Disclosed herein is polymer membrane for gas separation or concentration which contains a hybrid nanoporous material, an application thereof, and a manufacturing method thereof.Especially, the hybrid nanoporous material has a window size of 4 Å to 15 Å or has gas adsorption characteristics for a gas to be separated, which is different from those for other gases, and thus the present invention may provide the polymer membrane having improved gas permeation selectivity, an application thereof, and a manufacturing method thereof.

Abstract translation: 本文公开了用于气体分离或浓缩的聚合物膜，其包含混合纳米多孔材料，其应用及其制造方法。 特别地，混合纳米多孔材料的窗口尺寸为4至15，或者对于待分离气体具有气体吸附特性，这与其它气体不同，因此本发明可提供具有改进气体的聚合物膜 渗透选择性及其制备方法。