公开(公告)号：US20040154980A1

公开(公告)日：2004-08-12

申请号：US10773257

申请日：2004-02-09

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Hoon Sik Kim ,  Yong Soo Kang ,  Byung Gwon Lee ,  Hyun Joo Lee ,  Jae Hee Ryu

IPC: B01D039/14

CPC classification number: C10G31/11 ,  B01D53/228 ,  B01D69/142 ,  C07C7/144 ,  C07C11/02

Abstract: The present invention relates to polymer membranes for separating olefins from paraffins which have the similar molecular size and close boiling point. More particularly, it relates to a silver salt-containing facilitated transport membrane for olefin separation, and also a method for producing the same. An object of the present invention is to provide a silver salt-containing facilitated transport membrane for olefin separation having improved stability, and also a method for preparing the same, which exhibits no deterioration in membrane performance even when operated for an extended period of time. The facilitated transport membrane for olefin/paraffin separation of the present invention comprises a polymer, a silver salt, and a phthalate compound represented by the following formula (1) 1 wherein R denotes an alkyl group of 2 to 8 carbon atoms or a phenyl group.

Abstract translation: 本发明涉及用于从具有相似分子大小和接近沸点的石蜡中分离烯烃的聚合物膜。 更具体地说，本发明涉及一种用于烯烃分离的含银盐的促进输送膜，以及它们的制造方法。 本发明的目的是提供一种具有改进的稳定性的含银盐的促进烯烃分离的输送膜以及其制备方法，即使长时间操作也不会降低膜性能。 本发明的促进烯烃/石蜡分离的输送膜包括由下式（1）表示的聚合物，银盐和邻苯二甲酸酯化合物，其中R表示2至8个碳原子的烷基或苯基。

公开(公告)号：US20040016902A1

公开(公告)日：2004-01-29

申请号：US10205264

申请日：2002-07-24

Applicant: Korea Institute of Science and Technology

Inventor： Byung-Gwon Lee ,  Jong-Sung Lim ,  Hoon Sik Kim ,  Chang-Nyeon Kim

IPC: F25D001/00 ,  C09K005/00

CPC classification number: C09K5/045 ,  C09K2205/12 ,  C09K2205/22 ,  C09K2205/43

Abstract: A refrigerant composition that can be a substitute for chlorodifluoromethane (HCFC-22) comprises: (a) a first constituent of difluoromethane, (b) a second constituent of 1,1,1-trifluoroethane, (c) a third constituent of 1,1,1,2,3,3,3-heptafluoropropane and (d) a fourth constituent selected from the group consisting of isobutane, 1,1,1,2,3,3-hexafluropropane and butane; or comprises: (a) a first constituent of difluoromethane, (b) a second constituent of 1,1,1,2-tetrafluoroethane, (c) a third constituent of 1,1,-difluoroethane, and (d) a fourth constituent selected from the group consisting of 1,1,1,2,3,3,3-heptafluoropropane, 1,1,1,2,3,3-hexafluropropane and butane.