Patents by Inventor Bong Keun Song
Bong Keun Song has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20220177668Abstract: 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.Type: ApplicationFiled: April 8, 2020Publication date: June 9, 2022Applicants: Korea University Research and Business Foundation, EWHA UNIVERSITY - INDUSTRY COLLABORATION FOUNDATIONInventors: Kyoung Heon KIM, Jeong Chan JOO, Hee Taek KIM, Si Jae PARK, Hyun Gil CHA, Bong Keun SONG, Jae Kyun KIM
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Patent number: 11053520Abstract: 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.Type: GrantFiled: August 22, 2019Date of Patent: July 6, 2021Assignee: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGYInventors: Jeong Chan Joo, Hee Taek Kim, Bong Keun Song, Kyoung Hee Kang, Tae Uk Kang, Si Jae Park
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Patent number: 11008427Abstract: 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.Type: GrantFiled: September 21, 2018Date of Patent: May 18, 2021Assignee: Korea Research Institute of Chemical TechnologyInventors: Jihoon Shin, Yeong Un Kim, Min Woo Lee, Bong Keun Song
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Patent number: 10927388Abstract: 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.Type: GrantFiled: October 3, 2018Date of Patent: February 23, 2021Assignee: Korea Research Institute of Chemical TechnologyInventors: Ju Hyun Yu, Chan Duck Jung, In Yong Eom, Seung Hwan Lee, Kyung Sik Hong, In-Chul Kim, Jong Geon Jegal, Bong Keun Song
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Publication number: 20200263211Abstract: 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.Type: ApplicationFiled: August 22, 2019Publication date: August 20, 2020Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGYInventors: Jeong Chan JOO, Hee Taek KIM, Bong Keun SONG, Kyoung Hee KANG, Tae Uk KANG, Si Jae PARK
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Patent number: 10597688Abstract: 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.Type: GrantFiled: December 26, 2013Date of Patent: March 24, 2020Assignee: Korea Research Institute of Chemical TechnologyInventors: Ju Hyun Yu, Chan Duck Jung, Seung Hwan Lee, In-Chul Kim, Kyung Sik Hong, In Yong Eom, Jong Geon Jegal, Bong Keun Song
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Patent number: 10329589Abstract: 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.Type: GrantFiled: June 9, 2014Date of Patent: June 25, 2019Assignee: Korea Research Institute of Chemical TechnologyInventors: Ju Hyun Yu, Chan Duck Jung, In Yong Eom, Seung Hwan Lee, Kyung Sik Hong, In-Chul Kim, Jong Geon Jegal, Bong Keun Song
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Publication number: 20190032094Abstract: 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.Type: ApplicationFiled: October 3, 2018Publication date: January 31, 2019Inventors: Ju Hyun YU, Chan Duck JUNG, In Yong EOM, Seung Hwan LEE, Kyung Sik HONG, In Chul KIM, Jong Geon JEGAL, Bong Keun SONG
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Publication number: 20190023857Abstract: 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.Type: ApplicationFiled: September 21, 2018Publication date: January 24, 2019Applicant: Korea Research Institute of Chemical TechnologyInventors: Jihoon SHIN, Yeong Un KIM, Min Woo LEE, Bong Keun SONG
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Patent number: 10081823Abstract: Disclosed is a treatment method of biomass to maximize sugar yield, which uses a specific additive which can effectively adsorb lignin-derived compounds and various inhibitors of the enzymatic activity to promote saccharification of cellulose catalyzed by cellulose hydrolases, and thus can maximize sugar yield from pretreated biomass.Type: GrantFiled: December 23, 2011Date of Patent: September 25, 2018Assignee: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGYInventors: Ju Hyun Yu, Chan Duck Jung, In Yong Eom, Kyung Sik Hong, Bong Keun Song
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Patent number: 9914801Abstract: 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.Type: GrantFiled: December 1, 2015Date of Patent: March 13, 2018Assignee: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGYInventors: Jae Chang Lee, Jong Geon Jegal, Bong Keun Song
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Publication number: 20170342204Abstract: 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.Type: ApplicationFiled: December 1, 2015Publication date: November 30, 2017Inventors: Jae Chang LEE, Jong Geon JEGAL, Bong Keun SONG
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Publication number: 20160298142Abstract: 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.Type: ApplicationFiled: June 9, 2014Publication date: October 13, 2016Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGYInventors: Ju Hyun YU, Chan Duck JUNG, In Yong EOM, Seung Hwan LEE, Kyung Sik HONG, In Chul KIM, Jong Geon JEGAL, Bong Keun SONG
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Publication number: 20150353977Abstract: 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.Type: ApplicationFiled: December 26, 2013Publication date: December 10, 2015Applicant: Korea Research Institute of Chemical TechnologyInventors: Ju Hyun YU, Chan Duck JUNG, Seung Hwan LEE, In-Chul KIM, Kyung Sik HONG, In Yong EOM, Jong Geon JEGAL, Bong Keun SONG
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Patent number: 8883463Abstract: There is provided a recombinant microorganism having producibility of poly(lactate-co-glycolate) from glucose, and more particularly, a recombinant microorganism having producibility of poly(lactate-co-glycolate) without adding an exogenous glycolate precursor, and a method of preparing [poly(preparing lactate-co-glycolate)] using the same. According to the present invention, the poly(lactate-co-glycolate) in which the concentration of the glycolate fraction is high may be prepared at a high concentration without supplying exogenous glyoxylate. Therefore, the present invention may be effectively used for treatment.Type: GrantFiled: March 9, 2012Date of Patent: November 11, 2014Assignees: Korea Advanced Institute of Science and Technology, Korea Research Institute of Chemical TechnologyInventors: Sang Yup Lee, Si Jae Park, Seung Hwan Lee, Bong Keun Song, Yu Kyung Jung, Tae Woo Lee
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Publication number: 20140030775Abstract: There is provided a recombinant microorganism having producibility of poly(lactate-co-glycolate) from glucose, and more particularly, a recombinant microorganism having producibility of poly(lactate-co-glycolate) without adding an exogenous glycolate precursor, and a method of preparing [poly(preparing lactate-co-glycolate)] using the same. According to the present invention, the poly(lactate-co-glycolate) in which the concentration of the glycolate fraction is high may be prepared at a high concentration without supplying exogenous glyoxylate. Therefore, the present invention may be effectively used for treatment.Type: ApplicationFiled: March 9, 2012Publication date: January 30, 2014Applicants: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY, KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Sang Yup Lee, Si Jae Park, Seung Hwan Lee, Bong Keun Song, Yu Kyung Jung, Tae Woo Lee
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Publication number: 20130288312Abstract: Disclosed is a treatment method of biomass to maximize sugar yield, which uses a specific additive which can effectively adsorb lignin-derived compounds and various inhibitors of the enzymatic activity to promote saccharification of cellulose catalyzed by cellulose hydrolases, and thus can maximize sugar yield from pretreated biomass.Type: ApplicationFiled: December 23, 2011Publication date: October 31, 2013Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGYInventors: Ju Hyun Yu, Chan Duck Jung, In Yong Eom, Kyung Sik Hong, Bong Keun Song
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Patent number: 8198358Abstract: The present invention relates to a process for preparing phenolic polymers utilizing Coprinus cinereus peroxidase. More particularly, the present invention relates to a process for preparing phenolic polymers by polymerizing phenolic monomers with Coprinus cinereus peroxidase instead of using typical peroxidase which essentially requires the use of toxic formalin or peroxidase of plant origin which is very costly and easily deactivated by hydrogen peroxide in the polymerization of phenolic monomers, wherein the polymerization is conducted in the presence of a polar organic solvent under mild reaction conditions of atmospheric temperature and pressure to economically produce desired phenolic polymers having excellent water and chemical resistances with high yield.Type: GrantFiled: December 6, 2005Date of Patent: June 12, 2012Assignee: Korea Institute of Chemical TechnologyInventors: Yong Hwan Kim, Eun Suk An, Jeong Mi Kwon, Hyun Seong Jeong, Seung Yeong Park, Kee Hoon Won, Jae Kwang Song, Bong Keun Song, Jeong Yong Ryu
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Publication number: 20110160386Abstract: The present invention relates to a process for preparing phenolic polymers utilizing Coprinus cinereus peroxidase. More particularly, the present invention relates to a process for preparing phenolic polymers by polymerizing phenolic monomers with Coprinus cinereus peroxidase instead of using typical peroxidase which essentially requires the use of toxic formalin or peroxidase of plant origin which is very costly and easily deactivated by hydrogen peroxide in the polymerization of phenolic monomers, wherein the polymerization is conducted in the presence of a polar organic solvent under mild reaction conditions of atmospheric temperature and pressure to economically produce desired phenolic polymers having excellent water and chemical resistances with high yield.Type: ApplicationFiled: December 6, 2005Publication date: June 30, 2011Applicant: Korea Research Institute of Chemical TechnologyInventors: Yong Hwan Kim, Eun Suk An, Jeong Mi Kwon, Hyun Seong Jeong, Seung Yeong Park, Kee Hoon Won, Jae Kwang Song, Bong Keun Song, Jeong Yong Ryu
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Patent number: 7847134Abstract: Disclosed herein is a method for producing monohydric alcohols from monocarboxylic acids or derivatives thereof using a catalyst comprising ruthenium (Ru) and tin (Sn) using zinc oxide (ZnO) as both a catalyst support and an active promoter; a catalyst prepared by adding an inorganic binder such as silica, alumina or titania in a limited range to the catalyst comprising the above components in order to impart a shaping ability to the catalyst; or, a modified catalyst reformed by adding at least one reducing component selected from the group consisting of Co, Ni, Cu, Ag, Rh, Pd, Re, Ir, and Pt to the catalyst in order to improve the reducing ability of the catalyst.Type: GrantFiled: February 27, 2009Date of Patent: December 7, 2010Assignee: Korea Research Institute of Chemical TechnologyInventors: Jung Ho Lee, Jong San Chang, Young Kyu Hwang, Hyun Kwan Shin, Kwang Myung Cho, Bong Keun Song, Yong Hwan Kim