公开(公告)号：US20160304480A1

公开(公告)日：2016-10-20

申请号：US15098905

申请日：2016-04-14

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

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

IPC: C07D307/42 ,  C07D307/48 ,  C07D307/50 ,  C07D307/36

CPC classification number: C07D307/42 ,  C07D307/36 ,  C07D307/48 ,  C07D307/50

Abstract: The present invention relates to a method for preparing for a furan derivative from biomass, comprising step (1) of preparing 5-hydroxymethylfurfural by reacting biomass and a solid acid catalyst in butanol; and step (2) of preparing a furan derivative by reacting the butanol solution of 5-hydroxymethylfurfural, obtained in step (1), with a hydrogenation catalyst.

Abstract translation: 本发明涉及从生物质制备呋喃衍生物的方法，包括通过使生物质与丁醇中的固体酸催化剂反应制备5-羟甲基糠醛的步骤（1） 和步骤（2）通过使步骤（1）中获得的5-羟甲基糠醛的丁醇溶液与氢化催化剂反应来制备呋喃衍生物。

公开(公告)号：US20210253545A1

公开(公告)日：2021-08-19

申请号：US17167886

申请日：2021-02-04

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Dong Won HWANG ,  Young Kyu HWANG ,  Ma Eum LEE ,  Pravin Pandharinath Upare ,  Do Young HONG

IPC: C07D307/50 ,  B01J31/02

Abstract: The present disclosure provides a preparing method for 5-alkoxymethylfurfural, including steps of (a) preparing fructose, (b) mixing the fructose, an organic acid catalyst, and an organic solvent, thereby preparing mixing solution, and (c) heating the mixing solution, thereby preparing 5-alkoxymethylfurfural.
Therefore, 5-alkoxymethylfurfural may be effectively prepared without by-products from fructose.

公开(公告)号：US20170327437A1

公开(公告)日：2017-11-16

申请号：US15594115

申请日：2017-05-12

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Dong Won HWANG ,  Ho Jeong CHAE ,  MaEum LEE ,  Ji Sun YOON

IPC: C07C2/12 ,  C07C2/28

CPC classification number: C07C2/12 ,  C07C2/28 ,  C07C2523/755 ,  C07C2529/40 ,  C07C2529/46 ,  C07C2529/70 ,  C07C2529/76 ,  C07C2531/10 ,  Y02P20/52 ,  C07C11/02 ,  C07C11/107 ,  C07C11/08

Abstract: The present invention relates to a method for the oligomerization of ethylene, and more specifically, to a method for the preparation of mainly ethylene oligomers of C10 or higher, which comprises obtaining mainly ethylene oligomers of C4 or higher by performing a first oligomerization of an ethylene gas using a Ni-containing mesoporous catalyst, followed by a second oligomerization using an ion exchange resin, etc. The method for the preparation of ethylene oligomers according to the present invention can produce C8-16 ethylene oligomers in high yield without inducing inactivation of a catalyst, compared to the conventional technology of ethylene oligomerization by a one-step process.

公开(公告)号：US20170101390A1

公开(公告)日：2017-04-13

申请号：US15290647

申请日：2016-10-11

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Dong Won HWANG ,  Jong San CHANG ,  Young Kyu HWANG ,  U Hwang LEE ,  Do Young HONG ,  Su Kyung LEE ,  Kyung Ho CHO ,  Pravin Pandharinath UPARE

IPC: C07D319/12 ,  B01D3/00 ,  B01D39/00 ,  B01J8/02 ,  B01D9/00

CPC classification number: C07D319/12 ,  B01D9/0009 ,  B01D9/0054 ,  B01D39/00 ,  C07B2200/13

Abstract: The present invention relates to a method and apparatus for preparation of lactide using a lactide purification process, comprising introducing an aqueous solution comprising lactic acid into a reactor filled with a catalyst and reacting the same to produce crude lactide vapor; and purifying the crude lactide vapor to produce lactide crystals, wherein a first purification comprises collecting and crystallizing the crude lactide vapor using a first solvent to produce lactide crystals, and separating the lactide crystal from a residue through filtration.

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.