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1.发明授权公开(公告)号：US10329589B2
公开(公告)日：2019-06-25
申请号：US14991209
申请日：2014-06-09
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: C07H1/06 , C12P7/06 , C07H3/02 , C12P7/10 , C12P7/14 , C12P19/14 , C13K1/02 , C12P7/56 , C12P19/56 , 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.
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Patent Agency Ranking
公开(公告)号：US09914801B2
公开(公告)日：2018-03-13
申请号：US15534274
申请日：2015-12-01
Inventor： Jae Chang Lee , Jong Geon Jegal , Bong Keun Song
IPC: C08G63/08 , C08G63/85 , C08G63/91 , C08L101/00 , C09D167/04
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.
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公开(公告)号：US11053520B2
公开(公告)日：2021-07-06
申请号：US16548093
申请日：2019-08-22
Inventor： Jeong Chan Joo , Hee Taek Kim , Bong Keun Song , Kyoung Hee Kang , Tae Uk Kang , Si Jae Park
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.
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公开(公告)号：US11008427B2
公开(公告)日：2021-05-18
申请号：US16138752
申请日：2018-09-21
Inventor： Jihoon Shin , Yeong Un Kim , Min Woo Lee , Bong Keun Song
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.
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5.发明授权公开(公告)号：US10927388B2
公开(公告)日：2021-02-23
申请号：US16150760
申请日：2018-10-03
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 , C12P19/02 , C12P19/14 , C13K1/02 , C12P7/10 , C12P19/56 , C07H1/06 , C07H3/02 , C12P7/06 , C12P7/56
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.
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公开(公告)号：US10597688B2
公开(公告)日：2020-03-24
申请号：US14655158
申请日：2013-12-26
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
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.
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