Patents by Inventor Kee Do Han
Kee Do Han 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: 20230053926Abstract: The present invention pertains to: a batch-type suspension polymerization stirrer for producing polyvinyl chloride; and a batch-type suspension polymerization reactor using same. More specifically, the present invention pertains to a batch-type exothermic reactor for performing vinyl chloride polymerization while controlling the internal temperature of an exothermic reaction chamber. Even more specifically, the present invention pertains to an invention wherein the structure of a reflux condenser among jacket, baffle, and reflux condenser devices responsible for heat removal in a reactor is designed to improve productivity and polymerization efficiency.Type: ApplicationFiled: September 10, 2020Publication date: February 23, 2023Inventors: Hye Won Lee, Shin Beom Lee, Sung Eun Park, Wooyoul Ahan, Seon Jeong Jin, Kee Do Han
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Patent number: 11447581Abstract: The invention relates to a method for selective hydrogenation. More specifically, it relates to a method for selective hydrogenation capable of improving selectivity and reaction efficiency in the hydrogenation process of petroleum resin.Type: GrantFiled: December 19, 2018Date of Patent: September 20, 2022Assignee: HANWHA SOLUTIONS CORPORATIONInventors: Sang Ho Seo, Ji Hye Choi, Kee Do Han, Seong Ho Park, Bong Sik Jeon
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Publication number: 20210363099Abstract: The present invention relates to a method for preparing aliphatic isocyanate. More specifically, the present invention relates to a high purity isocyanate preparation method that can effectively recover unreacted materials and recycle them to a reaction step, and reduce energy consumed when separating reactants.Type: ApplicationFiled: June 3, 2019Publication date: November 25, 2021Inventors: Hyun Cheol RYU, Kee Do HAN
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Patent number: 11028046Abstract: The present invention relates to a toluene diisocyanate purification method enabling acquisition of a product having a small amount of dimers in a final product by means of using a reactive dividing wall column during toluene diisocyanate preparation. More particularly, according to the present invention, in order to obtain a product having a small amount of dimers in accordance with a reversible reaction of a monomer and a dimer, a purification procedure is designed by means of applying the temperature, pressure, time of stay and the like of a reactive dividing wall column as appropriate particular conditions, a reboiler having short time of stay and high heat transfer rate is used, and thus a dimerization reaction is inhibited and the purity and yield of the product are enhanced. Therefore, high-purity toluene diisocyanate can be purified and obtained.Type: GrantFiled: December 12, 2017Date of Patent: June 8, 2021Assignee: HANWHA CHEMICAL CORPORATIONInventors: Hyun Cheol Ryu, Kee Do Han, Seong Ho Park, Chang Mo Chung
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Publication number: 20200377447Abstract: The present invention relates to a toluene diisocyanate purification method enabling acquisition of a product having a small amount of dimers in a final product by means of using a reactive dividing wall column during toluene diisocyanate preparation. More particularly, according to the present invention, in order to obtain a product having a small amount of dimers in accordance with a reversible reaction of a monomer and a dimer, a purification procedure is designed by means of applying the temperature, pressure, time of stay and the like of a reactive dividing wall column as appropriate particular conditions, a reboiler having short time of stay and high heat transfer rate is used, and thus a dimerization reaction is inhibited and the purity and yield of the product are enhanced. Therefore, high-purity toluene diisocyanate can be purified and obtained.Type: ApplicationFiled: December 12, 2017Publication date: December 3, 2020Inventors: Hyun Cheol RYU, Kee Do HAN, Seong Ho PARK, Chang Mo CHUNG
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Publication number: 20200369794Abstract: The invention relates to a method for selective hydrogenation. More specifically, it relates to a method for selective hydrogenation capable of improving selectivity and reaction efficiency in the hydrogenation process of petroleum resin.Type: ApplicationFiled: December 19, 2018Publication date: November 26, 2020Inventors: Sang Ho SEO, Ji Hye CHOI, Kee Do HAN, Seong Ho PARK, Bong Sik JEON
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Patent number: 10081583Abstract: The present invention relates to a stripping method capable of recovering, by an environmentally friendly method, a high-purity ester-based compound without concern over the oxidation of an ester-based compound from a mixture containing the ester-based compound. The stripping method has advantages of generating no wastewater, enabling equipment costs to be reduced by simplifying the process, removing concern over the oxidation of an ester-based compound during the process, and enabling the reuse of the components recovered in the process.Type: GrantFiled: December 7, 2015Date of Patent: September 25, 2018Assignee: HANWHA CHEMICAL CORPORATIONInventors: Ki Taeg Jung, Hyo Suk Kim, Young Jo Kim, Kyong Jun Yoon, Kee Do Han
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Publication number: 20170362148Abstract: The present invention relates to a stripping method capable of recovering, by an environmentally friendly method, a high-purity ester-based compound without concern over the oxidation of an ester-based compound from a mixture containing the ester-based compound. The stripping method has advantages of generating no wastewater, enabling equipment costs to be reduced by simplifying the process, removing concern over the oxidation of an ester-based compound during the process, and enabling the reuse of the components recovered in the process.Type: ApplicationFiled: December 7, 2015Publication date: December 21, 2017Inventors: Ki Taeg JUNG, Hyo Suk KIM, Young Jo KIM, Kyong Jun YOON, Kee Do HAN
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Publication number: 20160332132Abstract: A batch reactor of which an installation structure of baffles is improved is provided. A batch reactor includes: a reactor main body containing a reactant; agitation blades provided in the reactor main body to agitate the reactant; a motor coupled to a rotation shaft of the agitation blades to rotate the agitation blades; and a plurality of baffles provided between an inner wall of the reactor main body and the agitation blades, and disposed at a distance from each other along a circumferential direction of the reactor main body. Each of the plurality of baffles includes a plurality of pipes disposed to be adjacent to each other along a radial direction and a circumferential direction of the reactor main body.Type: ApplicationFiled: December 18, 2014Publication date: November 17, 2016Applicant: HANWHA Chemical CorporationInventors: Ki Taeg JUNG, Kee Do Han, Young Jo KIM, Hyo Suk KIM, Kyong Jun YOON, Hye Won LEE
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Publication number: 20160280629Abstract: There are provided a method for hydrogenation of a phthalate compound. According to the method for hydrogenation of the present invention, a hydrogenation reaction is performed in a multi-pipe type reactor in a state in which a viscosity of only a liquid-phase phthalate based raw material is lowered, such that a yield of a hydrogenation reaction process may be improved, and operation stability and economical efficiency on a commercial scale may be improved by hot spot control. According to another method of the present invention, long-term activity of a catalyst used in a reaction is maintained, and performance of the catalyst may be improved, such that stability and economical efficiency of a hydrogenation process may be improved.Type: ApplicationFiled: December 17, 2014Publication date: September 29, 2016Inventors: Ki Taeg Jung, Hyo Suk Kim, Kyong Jun Yoon, Kee Do Han, Jang Young Kwak, Young Jo Kim, Pil Je Seong, Sang Wook Lee, Ying Zhang
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Publication number: 20150166344Abstract: An apparatus for preparing an electrode-active material, comprising a reactor that produces the electrode-active material by using a high-temperature high-pressure hydrothermal synthesis method; and decompression equipment that decreases the pressure of a fluid containing the electrode-active material. The decompression equipment includes a pipe-type or a tube-type decompressor.Type: ApplicationFiled: February 23, 2015Publication date: June 18, 2015Inventors: Ki Taeg Jung, Sei Ung Park, Kyu Ho Song, Seong Jae Lim, Kee Do Han
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Publication number: 20150010457Abstract: An apparatus for preparing an electrode-active material, comprising a reactor that produces the electrode-active material by using a high-temperature high-pressure hydrothermal synthesis method; and decompression equipment that decreases the pressure of a fluid containing the electrode-active material. The decompression equipment includes a pipe-type or a tube-type decompressor.Type: ApplicationFiled: January 14, 2013Publication date: January 8, 2015Applicant: HANWHA CHEMICAL CORPORATIONInventors: Ki Taeg Jung, Sei Ung Park, Kyu Ho Song, Seong Jae Lim, Kee Do Han
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Publication number: 20140295366Abstract: Preparation of an electrode-active material, which uses a reactor to produce an electrode-active material by using a supercritical hydrothermal synthesis method, and a double-pipe type heat exchanger which cools the product discharged from the reactor to a subcritical range or below it.Type: ApplicationFiled: December 10, 2012Publication date: October 2, 2014Applicant: HANWHA CHEMICAL CORPORATIONInventors: Kyu Ho Song, Sei Ung Park, Seong Jae Lim, Ki Taeg Jung, Kee Do Han
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Publication number: 20140004473Abstract: A method of calcining an electrode material using a rotary kiln comprising a heat treatment section which has a cylindrical kiln shell, a supply section for introducing a process material into the kiln shell, and a discharge section for discharging the process material from the kiln shell, wherein the method comprises: introducing particles of the electrode material into the upper part of the kiln shell; flowing a positive pressure gas through the inside of the kiln shell and calcining the electrode material particles while moving them from the upper part to the lower part of the kiln shell; and discharging the electrode material particles from the lower part of the kiln shell.Type: ApplicationFiled: March 15, 2012Publication date: January 2, 2014Applicant: Hanwha Chemical CorporationInventors: Kyu Ho Song, Kee Do Han, Young Ho Shin