公开(公告)号：US20220001328A1

公开(公告)日：2022-01-06

申请号：US17281904

申请日：2019-10-25

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Ji Woong YOON ,  Jong-San CHANG ,  U Hwang LEE ,  Young Kyu HWANG ,  Kyung Ho CHO

IPC: B01D53/26 ,  B01D46/00 ,  B01D53/04

Abstract: The present invention provides an energy-saving air dryer comprising: a compressor for compressing the air in the atmosphere to form compressed air; a heat exchanger which is disposed on one side of the compressor and recovers compression heat from the compressed air; a pre-filter which is disposed on one side of the heat exchanger and removes pollutants from the compressed air; a pair of adsorption towers which communicate with the pre-filter and are filled with an adsorbent, wherein dry air is formed when compressed air flows into the adsorption towers according to the opening and closing of a valve and moisture is adsorbed, or moisture is desorbed from the adsorbent when dry air retaining the compression heat recovered in the heat exchanger is transferred to the adsorption towers; and an after filter which extends from the one side of the adsorption towers and removes pollutants from the dry air from which moisture has been removed.

公开(公告)号：US20220323931A1

公开(公告)日：2022-10-13

申请号：US17641975

申请日：2020-08-28

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Jong-San CHANG ,  Kyung Ho CHO ,  U Hwang LEE ,  Young Kyu HWANG ,  Ji Woong YOON

IPC: B01J20/22 ,  C07F5/06 ,  B01J20/28

Abstract: The present invention relates to a metal-organic framework (MOF) having a three-dimensional porous structure and being represented by the chemical formula of [Al8(OH)a(BTC)b(IPA)c(L)d], a preparation method therefor, and a use thereof as an adsorbent and a catalyst.

公开(公告)号：US20190291075A1

公开(公告)日：2019-09-26

申请号：US16342937

申请日：2017-10-17

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Ji Woong YOON ,  Jong San CHANG ,  Young Kyu HWANG ,  Kyung Ho CHO ,  U Hwang LEE ,  Su Kyung LEE ,  Ji Sun LEE

IPC: B01J20/22 ,  B01D53/047 ,  C07C7/12 ,  B01J20/34

Abstract: The present invention relates to an organic-inorganic hybrid nanoporous material, maintaining a nanoporous skeleton structure formed by coordination of an organic ligand containing an aromatic compound to a trivalent central metal ion, and further having an intramolecular acid anhydride functional group modified on the aromatic compound of the nanoporous skeleton structure, and thereby exhibits selectivity for olefins, and an adsorbent comprising the same. Specifically, the organic-inorganic hybrid nanoporous material of the present invention exhibits an excellent olefin-selective adsorption capacity through differences in adsorption equilibrium and adsorption rate, and thus can be usefully employed in the separation of C2-C4 hydrocarbons. Further, the olefins adsorbed to the organic-inorganic hybrid nanoporous material can be desorbed by purging of an inert gas which is not liquefied by way of mild vacuum conditions or compression, and thus, the organic-inorganic hybrid nanoporous material can be used to prepare olefins by separating C2-C4 hydrocarbon mixtures.