公开(公告)号：US20170342204A1

公开(公告)日：2017-11-30

申请号：US15534274

申请日：2015-12-01

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Jae Chang LEE ,  Jong Geon JEGAL ,  Bong Keun SONG

IPC: C08G63/08 ,  C08G63/85 ,  C08G63/91 ,  C08L101/00

CPC classification number: C08G63/08 ,  C08G63/78 ,  C08G63/85 ,  C08G63/91 ,  C08L101/00 ,  C09D167/04

Abstract: The present invention relates to a method for preparing a stereoblock polylactide, comprising: a step of obtaining a first reaction mixture with a monomer conversion rate of 80 to 95% by adding a catalyst to a D-lactide and growing a PDLA chain; a step of obtaining a second reaction mixture with a monomer conversion rate of 80 to 95% by adding an L-lactide to the first reaction mixture and growing a racemic PDLLA chain at the end of the PDLA chain; and a step of further adding an L-lactide to the second reaction mixture and growing a PLLA chain at the end of the PDLLA chain through a polymerization reaction. The preparation method is capable of providing a more convenient synthesis by skipping a process of removing residual monomers in the middle of the reaction, and also of preventing multi-blocking and oligomerization of polymer chains due to a mixture of chains by gradually adding polymerizable monomers while controlling the monomer conversion rate in a one-port synthesis, thereby reducing chain transfer during the polymerization.

公开(公告)号：US20150353977A1

公开(公告)日：2015-12-10

申请号：US14655158

申请日：2013-12-26

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Ju Hyun YU ,  Chan Duck JUNG ,  Seung Hwan LEE ,  In-Chul KIM ,  Kyung Sik HONG ,  In Yong EOM ,  Jong Geon JEGAL ,  Bong Keun SONG

IPC: C12P19/02 ,  C12P19/14

CPC classification number: C12P19/02 ,  C12N1/20 ,  C12P19/14 ,  C12P2201/00

Abstract: The present invention relates to a method for preparing, from wood-based biomass, a high concentration of fermentable sugar which can be effectively used in culturing various industrial fermented bacteria. According to the method of the present invention, biomass can be extracted by hot water prior to a pre-treatment so as to remove extractible substances such as mineral salts to thus minimize the content of impurities in raw materials for an enzymatic saccharification. The biomass from which substances extractible by hot water are removed is pre-treated in the condition where xylan yield rate is maximized, thus achieving maximum inhibition of the generation of over-decomposed products of sugar. Subsequently, fermentable sugar for culturing various industrial fermented bacteria can be prepared in an inexpensive manner by only concentrating, using a separator membrane, the sugar solution obtained by an enzymatic saccharification of the pre-treated solid content obtained by a solid-liquid separation without washing the solid content with water.

Abstract translation: 本发明涉及一种从木质生物质制备高浓度可发酵糖的方法，可发酵糖可有效用于培养各种工业发酵细菌。 根据本发明的方法，可以在预处理之前用热水提取生物质，以除去无机盐等可萃取物质，从而使用于糖化的原料中的杂质含量最小化。 去除由热水提取的物质的生物质在木聚糖产率最大化的条件下进行预处理，从而达到产生过度分解的糖的最大抑制。 随后，可以以便宜的方式制备用于培养各种工业发酵细菌的可发酵糖，其仅通过使用隔膜将通过酶固化获得的糖溶液浓缩得到的预处理固体含量通过固液分离而不洗涤 固体含量与水。

公开(公告)号：US20190032094A1

公开(公告)日：2019-01-31

申请号：US16150760

申请日：2018-10-03

Applicant: Korea Research Institute of Chemical Technology

Inventor： Ju Hyun YU ,  Chan Duck JUNG ,  In Yong EOM ,  Seung Hwan LEE ,  Kyung Sik HONG ,  In Chul KIM ,  Jong Geon JEGAL ,  Bong Keun SONG

IPC: C12P7/14 ,  C12P19/56 ,  C12P7/06 ,  C07H1/06 ,  C12P19/14 ,  C13K1/02 ,  C12P7/56 ,  C12P7/10 ,  C07H3/02 ,  C12P19/02

Abstract: The present invention relates to a method for preparing bioethanol from lignocellulosic biomass. The method of the present invention is capable of: minimizing the impurity content of an enzymatic saccharification raw material, by extracting biomass using hot water, before pretreatment, and removing extractable substances such as inorganic salts; suppressing, to the greatest extent, the production of overdecomposition products of sugar, by pretreating the biomass, from which the hot water extractable substances have been removed, in a condition for maximizing xylan yield; preparing fermentable sugar at a low cost, without washing a pretreated solid obtained from subsequent solid-liquid separation, but by only concentrating a sugar solution obtained after enzymatic saccharification, using a separation film; and preparing bioethanol therefrom in high yield.

公开(公告)号：US20190023857A1

公开(公告)日：2019-01-24

申请号：US16138752

申请日：2018-09-21

Applicant: Korea Research Institute of Chemical Technology

Inventor： Jihoon SHIN ,  Yeong Un KIM ,  Min Woo LEE ,  Bong Keun SONG

IPC: C08J3/14 ,  C08B1/00

Abstract: The present invention relates to a method for preparing a non-acid-treated eco friendly cellulose nanocrystal and the cellulose nanocrystals prepared by the same. The methods for preparing the non-acid-treated cellulose nanocrystal and extracting the cellulose nanocrystal from cellulosic materials of the present invention are eco-friendly methods, compared with the conventional preparation method for cellulose nanocrystal based on acid-hydrolysis; are efficient due to the total energy saving process; are easy to utilize side products; and are characterized by high yield to produce the target cellulose nanocrystal. The nanocrystal prepared according to the present invention exhibits equivalent or higher aspect ratio, yield and crystallinity than the cellulose nanocrystal prepared through acid hydrolysis, and has remarkably excellent thermal stability, so that it can be effectively used for the production of membranes, electrical and electronic parts, substrates, heat insulating materials, and reinforcing materials required for durability against heat.

公开(公告)号：US20220177668A1

公开(公告)日：2022-06-09

申请号：US17602574

申请日：2020-04-08

Applicant: Korea University Research and Business Foundation ,  EWHA UNIVERSITY - INDUSTRY COLLABORATION FOUNDATION ,  KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Kyoung Heon KIM ,  Jeong Chan JOO ,  Hee Taek KIM ,  Si Jae PARK ,  Hyun Gil CHA ,  Bong Keun SONG ,  Jae Kyun KIM

IPC: C08J11/14 ,  C08G63/183 ,  C12P7/42 ,  C12P7/44 ,  C12P7/22

Abstract: The present invention pertains to a method for producing high value-added compounds from polyethylene terephthalate. More specifically, the present invention demonstrates that a monomeric terephthalic acid obtained from the chemical hydrolysis of polyethylene terephthalate can be converted to high value-added aromatic compounds and aromatic-derived compounds, and ethylene glycol, which is another monomer of polyethylene terephthalate, can be converted to glycolic acid, which is a cosmetic material. The present invention is characterized by recycling polyethylene terephthalate waste into high value-added compounds.

公开(公告)号：US20200263211A1

公开(公告)日：2020-08-20

申请号：US16548093

申请日：2019-08-22

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Jeong Chan JOO ,  Hee Taek KIM ,  Bong Keun SONG ,  Kyoung Hee KANG ,  Tae Uk KANG ,  Si Jae PARK

IPC: C12P7/44 ,  C12N15/77 ,  C12N9/02 ,  C12N9/10 ,  C12N9/80

Abstract: The present disclosure pertains to a recombinant Corynebacterium glutamicum strain for production of glutaric acid and a method for production of glutaric acid by using the same. When used to produce glutaric acid, the recombinant Corynebacterium glutamicum strain guarantees an excellent output and allows the selective production of glutaric acid without generation of byproducts, which needs no isolation and purification processes and thus leads to an economical benefit. Consequently, the recombinant strain is useful for production of glutaric acid.

公开(公告)号：US20160298142A1

公开(公告)日：2016-10-13

申请号：US14991209

申请日：2014-06-09

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Ju Hyun YU ,  Chan Duck JUNG ,  In Yong EOM ,  Seung Hwan LEE ,  Kyung Sik HONG ,  In Chul KIM ,  Jong Geon JEGAL ,  Bong Keun SONG

IPC: C12P7/14 ,  C07H1/06 ,  C12P7/56 ,  C07H3/02 ,  C12P19/14 ,  C12P19/02

CPC classification number: C12P7/14 ,  C07H1/06 ,  C07H3/02 ,  C12P7/065 ,  C12P7/10 ,  C12P7/56 ,  C12P19/02 ,  C12P19/14 ,  C12P19/56 ,  C12P2201/00 ,  C13K1/02 ,  Y02E50/16 ,  Y02E50/17

Abstract: The present invention relates to a method for preparing bioethanol from lignocellulosic biomass. The method of the present invention is capable of: minimizing the impurity content of an enzymatic saccharification raw material, by extracting biomass using hot water, before pretreatment, and removing extractable substances such as inorganic salts; suppressing, to the greatest extent, the production of overdecomposition products of sugar, by pretreating the biomass, from which the hot water extractable substances have been removed, in a condition for maximizing xylan yield; preparing fermentable sugar at a low cost, without washing a pretreated solid obtained from subsequent solid-liquid separation, but by only concentrating a sugar solution obtained after enzymatic saccharification, using a separation film; and preparing bioethanol therefrom in high yield.

Abstract translation: 本发明涉及从木质纤维素生物质制备生物乙醇的方法。 本发明的方法能够：通过在预处理之前用热水提取生物质，除去无机盐等可萃取物质，使酶糖化原料的杂质含量最小化。 在最大限度地抑制糖的过度分解产物的生产，通过在使木聚糖产率最大化的条件下预处理从其中除去热水可提取物质的生物质; 以低成本制备可发酵糖，而不洗涤从随后的固液分离得到的预处理固体，而仅通过使用分离膜浓缩酶糖化后获得的糖溶液; 并以高产率从其制备生物乙醇。