Patents by Inventor Do Hyun Kyung

Do Hyun Kyung 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).

  • Patent number: 9527861
    Abstract: The present invention relates to a production method for an anhydro sugar alcohol having a markedly reduced ion content and improved color characteristics, and, more specifically, relates to a method for producing an anhydrous sugar alcohol having a markedly reduced ion content, markedly lowered electrical conductivity and improved color characteristics, which is obtained by subjecting hydrogenated sugar (sugar alcohol) to a dehydration reaction and thereby converting same to an anhydrous sugar alcohol and then subjecting distilled water, which has been isolated through a distillation step, to a decolorizing process using activated carbon, and subsequently bringing the resulting decolorized substance into contact with an ion exchange resin.
    Type: Grant
    Filed: May 9, 2013
    Date of Patent: December 27, 2016
    Assignee: SAMYANG CORPORATION
    Inventors: Young Jae Jung, Jin Kyung Kim, Do Hyun Kyung, Hoon Ryu
  • Patent number: 9505777
    Abstract: The present invention relates to a method for preparing anhydrous sugar alcohol, and more particularly, to a cheap and highly efficient method for preparing anhydrous sugar alcohol having a high final purity of at least 99%, and having good ion content, pH, conductivity, and color properties. According to the method, a hydrogenated sugar is dehydrated so as to be transformed into anhydrous sugar alcohol, and a series of processes including distillation, crystallization, decoloration, and ion exchange resin treatment are conducted.
    Type: Grant
    Filed: October 15, 2013
    Date of Patent: November 29, 2016
    Assignee: SAMYANG CORPORATION
    Inventors: Hoon Ryu, Young Jae Jung, Jin Kyung Kim, Do Hyun Kyung, Hyuk Min Park, Seong Ho Cho
  • Patent number: 9399212
    Abstract: The present invention relates to a method for producing an anhydrosugar alcohol and, more specifically, to a method for producing an anhydrosugar alcohol which, when the step of subjecting a hydrogenated sugar to a dehydration reaction in a reactor so as to convert same to an anhydrosugar alcohol is performed, allows the hydrogenated sugar to be continuously introduced into the reactor and the produced anhydrosugar alcohol to be continuously discharged out of the reactor while the dehydration reaction is carried out, also prevents a reaction mixture from circulating inside and outside the reactor while the dehydration reaction is carried out, and thereby can significantly improve production efficiency compared with a conventional process adopting a batch or semi-batch-type dehydration reaction and thus can be appropriately applied particularly to a large-scale anhydrosugar alcohol production process.
    Type: Grant
    Filed: February 21, 2014
    Date of Patent: July 26, 2016
    Assignee: SAMYANG CORPORATION
    Inventors: Hoon Ryu, Young Jae Jung, Jin Kyung Kim, Do Hyun Kyung, Hyuk Min Park, Seong Ho Cho
  • Patent number: 9290508
    Abstract: The present invention relates to a method for preparing high purity anhydrosugar alcohols using hydrogenated sugar, and more specifically, to a method for preparing high purity anhydrosugar alcohols (particularly, isosorbide, isomannide, isoidide, and the like) with a purity of 97.5% or higher (more preferably, 98.5% or higher) and a pH of a distillate of 3.7 or higher (more preferably, 4.0 or higher) in a distillation yield of 87% or higher (more preferably, 90% or higher) by adding an acid to hexitol so as to convert the same into anhydrosugar alcohols, and single-stage distilling the converted product by using an internal condenser type thin film evaporator.
    Type: Grant
    Filed: May 9, 2013
    Date of Patent: March 22, 2016
    Assignee: SAMYANG GENEX CORPORATION
    Inventors: Do Hyun Kyung, Young Jae Jung, Jin Kyung Kim, Hoon Ryu
  • Patent number: 9260447
    Abstract: The present invention relates to a technique for preparing an anhydrosugar alcohol using hydrogenated sugar as a raw material and, more specifically, to a technique for preparing a high-purity anhydrosugar alcohol by adding an acid to hydrogenated sugar (for example, hexitol) to convert same to an anhydrosugar alcohol, then distilling the converted liquid, and crystallizing the distilled liquid in a solvent, the technique removing a crystallization solvent from a crystallization mother liquor generated during a crystallization step and then introducing the resultant product together with the distilled liquid and the converted liquid into a distillation step, thereby being capable of improving the total distillation yield of the anhydrosugar alcohol, improving distillation efficiency by improving the mobility of a distillate, and further reducing the amount of generated waste and treatment costs and thus highly efficiently preparing the high-purity anhydrosugar alcohol at reduced costs.
    Type: Grant
    Filed: November 6, 2013
    Date of Patent: February 16, 2016
    Assignee: SAMYANG GENEX CORPORATION
    Inventors: Hoon Ryu, Young Jae Jung, Jin Kyung Kim, Do Hyun Kyung, Hyuk Min Park, Seong Ho Cho
  • Publication number: 20150353574
    Abstract: The present invention relates to a method for producing an anhydrosugar alcohol and, more specifically, to a method for producing an anhydrosugar alcohol which, when the step of subjecting a hydrogenated sugar to a dehydration reaction in a reactor so as to convert same to an anhydrosugar alcohol is performed, allows the hydrogenated sugar to be continuously introduced into the reactor and the produced anhydrosugar alcohol to be continuously discharged out of the reactor while the dehydration reaction is carried out, also prevents a reaction mixture from circulating inside and outside the reactor while the dehydration reaction is carried out, and thereby can significantly improve production efficiency compared with a conventional process adopting a batch or semi-batch-type dehydration reaction and thus can be appropriately applied particularly to a large-scale anhydrosugar alcohol production process.
    Type: Application
    Filed: February 21, 2014
    Publication date: December 10, 2015
    Applicant: SAMYANG GENEX CORPORATION
    Inventors: Hoon RYU, Young Jae JUNG, Jin Kyung KIM, Do Hyun KYUNG, Hyuk Min PARK, Seong Ho CHO
  • Publication number: 20150329448
    Abstract: The present invention relates to a method for preparing an anhydrosugar alcohol using hydrol (namely, a crystalline mother liquor remaining after obtaining crystalline glucose from a crude glucose liquor). More particularly, the present invention relates to a method for preparing an anhydrosugar alcohol in a method for performing a dehydration reaction on the hydrogenated sugar so as to convert the hydrogenated sugar to an anhydrosugar alcohol, wherein the method for preparing an anhydrosugar alcohol is configured to use, as at least a portion of the hydrogenated sugar, the product obtained from the hydrogenation of the hydrol which is a by-product or waste generated during the production of glucose, thus relatively lowering the cost for a material as compared with a case of using a high purity raw material (for example, high purity sorbitol), to thus improve economical advantages, and further reduce the amount of waste and cost for disposal of the waste during the production of glucose.
    Type: Application
    Filed: December 12, 2013
    Publication date: November 19, 2015
    Applicant: SAMYANG GENEX CORPORATION
    Inventors: Hoon RYU, Young Jae JUNG, Jin Kyung KIM, Do Hyun KYUNG, Hyuk Min PARK, Seong Ho CHO
  • Publication number: 20150307511
    Abstract: The present invention relates to a technique for preparing an anhydrosugar alcohol using hydrogenated sugar as a raw material and, more specifically, to a technique for preparing a high-purity anhydrosugar alcohol (in particular, isosorbide, isomannide, isoidide, and the like) having a purity of 98% or higher and containing less than 0.1% of sorbitol and a sorbitan isomer, which are impurities, in a high total distillation yield of 94% or higher (more preferably, 95% or higher) by adding an acid to hydrogenated sugar (for example, hexitol) to convert same to an anhydrosugar alcohol, and then distilling the converted liquid over two or more stages by sequentially using a combination of an external condenser type wiped film evaporator and an internal condenser type short path evaporator.
    Type: Application
    Filed: November 6, 2013
    Publication date: October 29, 2015
    Applicant: SAMYANG GENEX CORPORATION
    Inventors: Hoon RYU, Young Jae JUNG, Jin Kyung KIM, Do Hyun KYUNG, Hyuk Min PARK, Seong Ho CHO
  • Patent number: 9169180
    Abstract: The present invention relates to a method for preparing an anhydrosugar alcohol using hydrol (namely, a crystalline mother liquor remaining after obtaining crystalline glucose from a crude glucose liquor). More particularly, the present invention relates to a method for preparing an anhydrosugar alcohol in a method for performing a dehydration reaction on the hydrogenated sugar so as to convert the hydrogenated sugar to an anhydrosugar alcohol, wherein the method for preparing an anhydrosugar alcohol is configured to use, as at least a portion of the hydrogenated sugar, the product obtained from the hydrogenation of the hydrol which is a by-product or waste generated during the production of glucose, thus relatively lowering the cost for a material as compared with a case of using a high purity raw material (for example, high purity sorbitol), to thus improve economical advantages, and further reduce the amount of waste and cost for disposal of the waste during the production of glucose.
    Type: Grant
    Filed: December 12, 2013
    Date of Patent: October 27, 2015
    Assignee: SAMYANG GENEX CORPORATION
    Inventors: Hoon Ryu, Young Jae Jung, Jin Kyung Kim, Do Hyun Kyung, Hyuk Min Park, Seong Ho Cho
  • Patent number: 9169263
    Abstract: The present invention relates to a technique for preparing an anhydrosugar alcohol using hydrogenated sugar as a raw material and, more specifically, to a technique for preparing a high-purity anhydrosugar alcohol (in particular, isosorbide, isomannide, isoidide, and the like) having a purity of 98% or higher and containing less than 0.1% of sorbitol and a sorbitan isomer, which are impurities, in a high total distillation yield of 94% or higher (more preferably, 95% or higher) by adding an acid to hydrogenated sugar (for example, hexitol) to convert same to an anhydrosugar alcohol, and then distilling the converted liquid over two or more stages by sequentially using a combination of an external condenser type wiped film evaporator and an internal condenser type short path evaporator.
    Type: Grant
    Filed: November 6, 2013
    Date of Patent: October 27, 2015
    Assignee: SAMYANG GENEX CORPORATION
    Inventors: Hoon Ryu, Young Jae Jung, Jin Kyung Kim, Do Hyun Kyung, Hyuk Min Park, Seong Ho Cho
  • Publication number: 20150299216
    Abstract: The present invention relates to a method for preparing anhydrous sugar alcohol, and more particularly, to a cheap and highly efficient method for preparing anhydrous sugar alcohol having a high final purity of at least 99%, and having good ion content, pH, conductivity, and color properties. According to the method, a hydrogenated sugar is dehydrated so as to be transformed into anhydrous sugar alcohol, and a series of processes including distillation, crystallization, decoloration, and ion exchange resin treatment are conducted.
    Type: Application
    Filed: October 15, 2013
    Publication date: October 22, 2015
    Applicant: SAMYANG GENEX CORPORATION
    Inventors: Hoon RYU, Young Jae JUNG, Jin Kyung KIM, Do Hyun KYUNG, Hyuk Min PARK, Seong Ho CHO
  • Publication number: 20150252054
    Abstract: The present invention relates to a technique for preparing an anhydrosugar alcohol using hydrogenated sugar as a raw material and, more specifically, to a technique for preparing a high-purity anhydrosugar alcohol by adding an acid to hydrogenated sugar (for example, hexitol) to convert same to an anhydrosugar alcohol, then distilling the converted liquid, and crystallizing the distilled liquid in a solvent, the technique removing a crystallization solvent from a crystallization mother liquor generated during a crystallization step and then introducing the resultant product together with the distilled liquid and the converted liquid into a distillation step, thereby being capable of improving the total distillation yield of the anhydrosugar alcohol, improving distillation efficiency by improving the mobility of a distillate, and further reducing the amount of generated waste and treatment costs and thus highly efficiently preparing the high-purity anhydrosugar alcohol at reduced costs.
    Type: Application
    Filed: November 6, 2013
    Publication date: September 10, 2015
    Applicant: SAMYANG GENEX CORPORATION
    Inventors: Hoon Ryu, Young Jae Jung, Jin Kyung Kim, Do Hyun Kyung, Hyuk Min Park, Seong Ho Cho
  • Publication number: 20150112088
    Abstract: The present invention relates to a method for preparing high purity anhydrosugar alcohols using hydrogenated sugar, and more specifically, to a method for preparing high purity anhydrosugar alcohols (particularly, isosorbide, isomannide, isoidide, and the like) with a purity of 97.5% or higher (more preferably, 98.5% or higher) and a pH of a distillate of 3.7 or higher (more preferably, 4.0 or higher) in a distillation yield of 87% or higher (more preferably, 90% or higher) by adding an acid to hexitol so as to convert the same into anhydrosugar alcohols, and single-stage distilling the converted product by using an internal condenser type thin film evaporator.
    Type: Application
    Filed: May 9, 2013
    Publication date: April 23, 2015
    Applicant: SAMYANG GENEX CORPORATION
    Inventors: Do Hyun Kyung, Young Jae Jung, Jin Kyung Kim, Hoon Ryu
  • Publication number: 20150094477
    Abstract: The present invention relates to a production method for an anhydro sugar alcohol having a markedly reduced ion content and improved colour characteristics, and, more specifically, relates to a method for producing an anhydrous sugar alcohol having a markedly reduced ion content, markedly lowered electrical conductivity and improved colour characteristics, which is obtained by subjecting hydrogenated sugar (sugar alcohol) to a dehydration reaction and thereby converting same to an anhydrous sugar alcohol and then subjecting distilled water, which has been isolated through a distillation step, to a decolourizing process using activated carbon, and subsequently bringing the resulting decolourized substance into contact with an ion exchange resin.
    Type: Application
    Filed: May 9, 2013
    Publication date: April 2, 2015
    Applicant: SAMYANG GENEX CORPORATION
    Inventors: Young Jae Jung, Jin Kyung Kim, Do Hyun Kyung, Hoon Ryu