Patents by Inventor Young-Hyun Choe
Young-Hyun Choe 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: 20230001390Abstract: A method for preparing a molybdenum-bismuth-based composite metal oxide.Type: ApplicationFiled: August 17, 2021Publication date: January 5, 2023Inventors: Hyunsub Lim, Byung Yul Choi, Young Hyun Choe, Dong Woo Seo, Hyeonho Joo, Youngju Choi, Saeha Lee, Minsu Kim
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Patent number: 10857525Abstract: The present invention relates to a catalyst for preparing acrolein and acrylic acid, and a preparation method thereof. The catalyst according to the present invention can be uniformly packed in a reactor and the collapse of the catalyst can be minimized because it has excellent mechanical properties, and it can be stably used for a long period of time.Type: GrantFiled: May 26, 2014Date of Patent: December 8, 2020Assignee: LG CHEM, LTD.Inventors: Hyun-Sub Lim, Duk-Ki Kim, Hyun-Jong Shin, Ju-Yeon Park, Byung-Yul Choi, Young-Hyun Choe
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Patent number: 10569260Abstract: The present invention relates to a method for preparing a catalyst and a method for preparing unsaturated carboxylic acid using the catalyst prepared according to the preparation method. According to the method for preparing a catalyst, unsaturated carboxylic acid can be provided from an unsaturated aldehyde with a high conversion rate and selectivity.Type: GrantFiled: October 25, 2017Date of Patent: February 25, 2020Assignee: LG CHEM, LTD.Inventors: Byung Yul Choi, Young Hyun Choe, Duk Ki Kim, Hyun Jong Shin, Ju Yeon Park, Hyun Sub Lim, Hyo Sang You
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Patent number: 10428007Abstract: The present invention relates to a method for producing unsaturated aldehydes and unsaturated carboxylic acids. According to the present invention, a method for producing unsaturated aldehydes and unsaturated carboxylic acids which can impart activity and control temperature independently in fixed catalyst layer zones in a shell-and-tube reactor, thereby exhibiting improved yield and operation stability, is provided.Type: GrantFiled: October 17, 2017Date of Patent: October 1, 2019Assignee: LG CHEM, LTD.Inventors: Byung Yul Choi, Hyun Jong Shin, Junghoon Chang, Young Hyun Choe, Jun Seok Ko, Sang Hun Jeon
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Publication number: 20190092713Abstract: The present invention relates to a method for producing unsaturated aldehydes and unsaturated carboxylic acids. According to the present invention, a method for producing unsaturated aldehydes and unsaturated carboxylic acids which can impart activity and control temperature independently in fixed catalyst layer zones in a shell-and-tube reactor, thereby exhibiting improved yield and operation stability, is provided.Type: ApplicationFiled: October 17, 2017Publication date: March 28, 2019Applicant: LG CHEM, LTD.Inventors: Byung Yul CHOI, Hyun Jong SHIN, Junghoon CHANG, Young Hyun CHOE, Jun Seok KO, Sang Hun JEON
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Publication number: 20190060884Abstract: The present invention relates to a method for preparing a catalyst and a method for preparing unsaturated carboxylic acid using the catalyst prepared according to the preparation method. According to the method for preparing a catalyst, unsaturated carboxylic acid can be provided from an unsaturated aldehyde with a high conversion rate and selectivity.Type: ApplicationFiled: October 25, 2017Publication date: February 28, 2019Inventors: Byung Yul CHOI, Young Hyun CHOE, Duk Ki KIM, Hyun Jong SHIN, Ju Yeon PARK, Hyun Sub LIM, Hyo Sang YOU
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Patent number: 9919295Abstract: The present invention relates to a high-performance polyoxometalate catalyst and a method of preparing the same. More particularly, the present invention provides a high-performance polyoxometalate catalyst, the activity and selectivity of which may be improved by controlling the content of vanadium and the like and which has superior reproducibility and may unsaturated carboxylic acid from unsaturated aldehyde in a high yield for a long time, a method of preparing the same, and the like.Type: GrantFiled: June 24, 2016Date of Patent: March 20, 2018Assignee: LG CHEM, LTD.Inventors: Byung Yul Choi, Hyun Jong Shin, Young Hyun Choe, Duk Ki Kim, Hyun Sub Lim, Hyo Sang You
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Publication number: 20170225154Abstract: The present invention relates to a high-performance polyoxometalate catalyst and a method of preparing the same. More particularly, the present invention provides a high-performance polyoxometalate catalyst, the activity and selectivity of which may be improved by controlling the content of vanadium and the like and which has superior reproducibility and may unsaturated carboxylic acid from unsaturated aldehyde in a high yield for a long time, a method of preparing the same, and the like.Type: ApplicationFiled: June 24, 2016Publication date: August 10, 2017Inventors: Byung Yul CHOI, Hyun Jong SHIN, Young Hyun CHOE, Duk Ki KIM, Hyun Sub LIM, Hyo Sang YOU
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Publication number: 20160001270Abstract: The present invention relates to a catalyst for preparing acrolein and acrylic acid, and a preparation method thereof. The catalyst according to the present invention can be uniformly packed in a reactor and the collapse of the catalyst can be minimized because it has excellent mechanical properties, and it can be stably used for a long period of time.Type: ApplicationFiled: May 26, 2014Publication date: January 7, 2016Inventors: Hyun-Sub LIM, Duk-Ki KIM, Hyun-Jong SHIN, Ju-Yeon PARK, Byung-Yul CHOI, Young-Hyun CHOE
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Publication number: 20150367329Abstract: The present invention relates to a catalyst for preparing acrolein and acrylic acid, and use of the same. The catalyst according to the present invention can be uniformly packed in the reactor and collapse of the catalyst can be minimized because it has excellent mechanical properties, and it can lower initial pressure of the reaction by securing stable pore spaces and can be stably used for a long period of time. In addition, the preparation method of acrolein and acrylic acid according to the present invention can provide more improved production efficiency by using the catalyst.Type: ApplicationFiled: May 26, 2014Publication date: December 24, 2015Applicant: LG CHEM. LTD.Inventors: Hyun-Sub LIM, Hyun-Jong SHIN, Ju-Yeon PARK, Byung-Yul CHOI, Young-Hyun CHOE, Duk-Ki KIM
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Patent number: 8114805Abstract: The present invention relates to a method of preparing a heteropoly acid catalyst used for the production of methacrylic acid by gas phase oxidation of methacrolein, more precisely a method of preparing a heteropoly acid catalyst comprising the steps of preparing a slurry by adding metal precursors and ammonium salt to protonic acid Keggin-type heteropoly acid aqueous solution and stirring thereof; and drying, molding and firing the slurry to give a catalyst. The present invention provides a method of preparing a heteropoly acid catalyst exhibiting high methacrolein conversion rate and methacrylic acid selectivity without pre-firing process by using high purity protonic acid Keggin-type heteropoly acid and ammonium salt.Type: GrantFiled: June 13, 2008Date of Patent: February 14, 2012Assignee: LG Chem, Ltd.Inventors: Hyun-Kuk Noh, Hyun-jong Shin, Won-ho Lee, Byung-yul Choi, Gyo-hyun Hwang, Ju-yeon Park, Duk-ki Kim, Young-hyun Choe, Min-ho Kil, Min-suk Kim, Young-jin Cho, Sung-chul Lim
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Publication number: 20100298601Abstract: The present invention relates to a catalyst system, an oxidation reactor comprising the same, and a method for producing an acrolein and an acrylic acid by using the same. By using the catalyst system according to the present invention, when acrolein and acrylic acid are produced, since heat accumulation in a catalyst layer may be effectively prevented, catalyst deterioration may be prevented, and the catalyst may be stably used for a long period of time. In addition, an acrolein and an acrylic acid may be produced at high selectivity and high yield.Type: ApplicationFiled: January 16, 2009Publication date: November 25, 2010Applicant: LG CHEM, LTD.Inventors: Byung-Yul Choi, Hyun-Jong Shin, Young-Hyun Choe, Young-Jin Cho, Duk-Ki Kim, Ju-Yeon Park
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Publication number: 20100184591Abstract: The present invention relates to a method of preparing a heteropoly acid catalyst used for the production of methacrylic acid by gas phase oxidation of methacrolein, more precisely a method of preparing a heteropoly acid catalyst comprising the steps of preparing a slurry by adding metal precursors and ammonium salt to protonic acid Keggin-type heteropoly acid aqueous solution and stirring thereof; and drying, molding and firing the slurry to give a catalyst. The present invention provides a method of preparing a heteropoly acid catalyst exhibiting high methacrolein conversion rate and methacrylic acid selectivity without pre-firing process by using high purity protonic acid Keggin-type heteropoly acid and ammonium salt.Type: ApplicationFiled: June 13, 2008Publication date: July 22, 2010Applicant: LG CHEM, LTD.Inventors: Hyun-Kuk Noh, Hyun-jong Shin, Won-ho Lee, Byung-yul Choi, Gyo-hyun Hwang, Ju-yeon Park, Duk-ki Kim, Young-hyun Choe, Min-ho Kil, Min-suk Kim, Young-jin Cho, Sung-chul Lim
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Patent number: 7638458Abstract: Disclosed are a Mo—Bi—Nb—Te based composite metal oxide; and a process for producing (meth)acrylic acid from at least one reaction material selected from the group consisting of propylene, propane, isobutylene, t-butyl alcohol and methyl-t-butyl ether, wherein the Mo—Bi—Nb—Te based composite metal oxide is used as a catalyst. Also, disclosed is a process for producing (meth)acrylic acid comprising a first step of producing (meth)acrolein as a main product from at least one reaction material selected from the group consisting of propylene, propane, isobutylene, t-butyl alcohol and methyl-t-butyl ether, and a second step of producing (meth)acrylic acid from the (meth)acrolein, wherein yield of (meth)acrylic acid in the product of the first step is 20 mole % or higher.Type: GrantFiled: August 10, 2006Date of Patent: December 29, 2009Assignee: LG Chem, Ltd.Inventors: Hyun Jong Shin, Byung Yul Choi, Yeon Shick Yoo, Young Hyun Choe, Young Jin Cho, Duk Ki Kim, Kwang Ho Park, Joo Yeon Park
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Patent number: 7635786Abstract: Disclosed are a Mo—Bi—Nb—Te based composite metal oxide; and a process for producing (meth)acrylic acid from at least one reaction material selected from the group consisting of propylene, propane, isobutylene, t-butyl alcohol and methyl-t-butyl ether, wherein the Mo—Bi—Nb—Te based composite metal oxide is used as a catalyst. Also, disclosed is a process for producing (meth)acrylic acid comprising a first step of producing (meth)acrolein as a main product from at least one reaction material selected from the group consisting of propylene, propane, isobutylene, t-butyl alcohol and methyl-t-butyl ether, and a second step of producing (meth)acrylic acid from the (meth)acrolein, wherein yield of (meth)acrylic acid in the product of the first step is 20 mole % or higher.Type: GrantFiled: October 16, 2008Date of Patent: December 22, 2009Assignee: LG Chem, Ltd.Inventors: Hyun Jong Shin, Byung Yul Choi, Yeon Shick Yoo, Young Hyun Choe, Young Jin Cho, Duk Ki Kim, Kwang Ho Park, Joo Yeon Park
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Publication number: 20090043127Abstract: Disclosed are a Mo—Bi—Nb—Te based composite metal oxide; and a process for producing (meth)acrylic acid from at least one reaction material selected from the group consisting of propylene, propane, isobutylene, t-butyl alcohol and methyl-t-butyl ether, wherein the Mo—Bi—Nb—Te based composite metal oxide is used as a catalyst. Also, disclosed is a process for producing (meth)acrylic acid comprising a first step of producing (meth)acrolein as a main product from at least one reaction material selected from the group consisting of propylene, propane, isobutylene, t-butyl alcohol and methyl-t-butyl ether, and a second step of producing (meth)acrylic acid from the (meth)acrolein, wherein yield of (meth)acrylic acid in the product of the first step is 20 mole % or higher.Type: ApplicationFiled: October 16, 2008Publication date: February 12, 2009Applicant: LG CHEM, LTD.Inventors: Hyun Jong SHIN, Byung Yul CHOI, Yeon Shick YOO, Young Hyun CHOE, Young Jin CHO, Duk Ki KIM, Kwang Ho PARK, Joo Yeon PARK
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Patent number: 7341974Abstract: The present invention relates to a method for preparing a catalyst for partial oxidation of propylene, particularly a method for preparing a catalyst for preparing an acrylic acid, using an organic acid such as a citric acid, maleic acid and oxalic acid. The complex oxide catalyst according to the invention, when used in the gas phase catalytic oxidation of propylene, may produce acrolein in high yield.Type: GrantFiled: January 3, 2003Date of Patent: March 11, 2008Assignee: LG Chem, Ltd.Inventors: Jung Hwa Kang, Won Ho Lee, Min Ho Kil, Hyun Jong Shin, Byung Yul Choi, Yeon Shick Yoo, Young Hyun Choe, Ju Yeon Park
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Patent number: 7285514Abstract: The present invention relates to a method for preparing a catalyst for partial oxidation of acrolein, particularly to a method for preparing a catalyst for partial oxidation of acrolein that has a superior acrolein conversion rate, acrylic acid activity, selectivity, and yield, by introducing a base solution and an acid solution into a catalyst suspension prepared by dissolving salts of metal ingredients of the catalyst in water to control the acidity of the catalyst suspension, contacting the catalyst suspension of which acidity is controlled with an inert support to support the catalyst thereon, and then drying and firing the supported catalyst.Type: GrantFiled: October 24, 2003Date of Patent: October 23, 2007Assignee: LG Chem, Ltd.Inventors: Jung-Hwa Kang, Won-Ho Lee, Min-Ho Kil, Hyun-Jong Shin, Byung-Yul Choi, Yeon-Shick Yoo, Young-Hyun Choe, Ju-Yeon Park
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Publication number: 20040192545Abstract: The present invention relates to a method for preparing a catalyst for partial oxidation of propylene, particularly a method for preparing a catalyst for preparing an acrylic acid, using an organic acid such as a citric acid, maleic acid and oxalic acid. The complex oxide catalyst according to the invention, when used in the gas phase catalytic oxidation of propylene, may produce acrolein in high yield.Type: ApplicationFiled: February 11, 2004Publication date: September 30, 2004Inventors: Jung Hwa Kang, Won Ho Lee, Min Ho Kil, Hyun Jong Shin, Byung Yul Choi, Yeon Shick Yoo, Young Hyun Choe, Ju Yeon Park
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Publication number: 20040116283Abstract: The present invention relates to a method for preparing a catalyst for partial oxidation of acrolein, particularly to a method for preparing a catalyst for partial oxidation of acrolein that has a superior acrolein conversion rate, acrylic acid activity, selectivity, and yield, by introducing a base solution and an acid solution into a catalyst suspension prepared by dissolving salts of metal ingredients of the catalyst in water to control the acidity of the catalyst suspension, contacting the catalyst suspension of which acidity is controlled with an inert support to support the catalyst thereon, and then drying and firing the supported catalyst.Type: ApplicationFiled: October 24, 2003Publication date: June 17, 2004Inventors: Jung-Hwa Kang, Won-Ho Lee, Min-Ho Kil, Hyun-Jong Shin, Byung-Yul Choi, Yeon-Shick Yoo, Young-Hyun Choe, Ju-Yeon Park