Patents by Inventor Tung-Han Tsai
Tung-Han Tsai 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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Patent number: 11678677Abstract: A method for decolorization and deodorization of egg yolk oil comprises at least: adding a first ether solution to a crude egg yolk oil, and performing a first stirring process, to produce a first egg yolk oil mixture; adding activated carbon to the first egg yolk oil mixture, performing a second stirring process, and removing the activated carbon, to produce a second egg yolk oil mixture; adding a second ether solution and distilled water to the second egg yolk oil mixture, and performing a third stirring process, to produce a third egg yolk oil mixture; and removing distilled water, part of the first ether solution, and part of the second ether solution from the third egg yolk oil mixture by a distillation process, and removing the remaining first ether solution and the remaining second ether solution by a vacuum process to produce a decolorized and deodorized egg yolk oil.Type: GrantFiled: June 11, 2020Date of Patent: June 20, 2023Assignee: TAMKANG UNIVERSITYInventors: Yau-Hung Chen, Ming-Kai Chern, Tung-Han Tsai, I-Chang Liu, Bo-Cheng Wang
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Publication number: 20210195910Abstract: A method for decolorization and deodorization of egg yolk oil comprises at least: adding a first ether solution to a crude egg yolk oil, and performing a first stirring process, to produce a first egg yolk oil mixture; adding activated carbon to the first egg yolk oil mixture, performing a second stirring process, and removing the activated carbon, to produce a second egg yolk oil mixture; adding a second ether solution and distilled water to the second egg yolk oil mixture, and performing a third stirring process, to produce a third egg yolk oil mixture; and removing distilled water, part of the first ether solution, and part of the second ether solution from the third egg yolk oil mixture by a distillation process, and removing the remaining first ether solution and the remaining second ether solution by a vacuum process to produce a decolorized and deodorized egg yolk oil.Type: ApplicationFiled: June 11, 2020Publication date: July 1, 2021Inventors: YAU-HUNG CHEN, MING-KAI CHERN, TUNG-HAN TSAI, I-CHANG LIU, BO-CHENG WANG
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Patent number: 8962861Abstract: The present invention provides a catalyst composition and a method for preparing an amide. The catalyst composition of the present invention including a hydroxylamine salt, sulfuric acid, and a nitrogen-containing heterocyclic compound is used for catalyzing a ketoxime to form an amide in the Beckman rearrangement reaction. The preparation of an amide by using the catalyst composition of the present invention has high conversion rate of a ketoxime, high selectivity of an amide and high tolerance to water.Type: GrantFiled: January 27, 2012Date of Patent: February 24, 2015Assignee: China Petrochemical Development CorporationInventors: Chien-Chuan Shih, Cheng-Fa Hsieh, Hung-Hung Hseuh, Tung-Han Tsai
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Patent number: 8865892Abstract: The present invention provides a method for preparing an amide. The method includes the steps of performing in a reactor including a catalyst composition having a nitrogen-containing heterocyclic compound and sulfuric acid Beckman rearrangement of a ketoxime to form a product stream having the amide, wherein a molar ratio of the nitrogen-containing heterocyclic compound to the sulfuric acid is from 1:1 to 1:8; and separating an organic phase having the amide and an aqueous phase having the catalyst composition from the product stream. The present invention facilitates the regeneration of the catalyst composition with low water content, so as to increase the conversion rate of a ketoxime and the selectivity of an amide.Type: GrantFiled: December 21, 2011Date of Patent: October 21, 2014Assignee: China Petroleum Development Corporation, Taipei (Taiwan)Inventors: Tung-Han Tsai, Cheng-Fa Hsieh, Hung-Hung Hseuh, Chien-Chuan Shih
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Patent number: 8643993Abstract: The present invention discloses a short-circuit detection circuit and a short-circuit detection method. The short-circuit detection circuit detects whether an output node is short-circuited to a first predetermined level. A first switch circuit which is controlled by a control signal is coupled between the output node and a second predetermined level. The short-circuit detection circuit includes: a determination circuit, which is coupled between the output node and the second predetermined level, wherein when the determination circuit is enabled, it generates a determination signal according to whether the output node is short-circuited to the first predetermined level; and a second switch circuit, which generates a short-circuit detection signal according to the determination signal.Type: GrantFiled: February 10, 2012Date of Patent: February 4, 2014Assignee: Richtek Technology Corporation, R.O.C.Inventors: Kuo-Chen Tsai, Wei-Lun Hsieh, Tung-Han Tsai, Ming-Jun Hsiao
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Patent number: 8524895Abstract: The present invention provides a method for preparing amides, in which an amino acid ionic liquid is used as both a reaction medium and a catalyst to catalyze Beckman rearrangement of a ketoxime, so as to produce an amide. In the method, the rearrangement is conducted by catalyzing a ketoxime with an amino acid ionic liquid having the asymmetric property at a moderate reaction temperature during a short reaction time, so as to produce an amide without adding other catalysts such as concentrate sulfuric acid. The method has advantages such as avoiding corrosion in equipments with pipelines, the high conversion rate of ketoximes and the high selectivity of amides.Type: GrantFiled: July 13, 2009Date of Patent: September 3, 2013Assignee: China Petrochemical Development CorporationInventors: Tung-Han Tsai, Pin-To Yao, Cheng-Fa Hsieh
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Publication number: 20130128395Abstract: The present invention discloses a short-circuit detection circuit and a short-circuit detection method. The short-circuit detection circuit detects whether an output node is short-circuited to a first predetermined level. A first switch circuit which is controlled by a control signal is coupled between the output node and a second predetermined level. The short-circuit detection circuit includes: a determination circuit, which is coupled between the output node and the second predetermined level, wherein when the determination circuit is enabled, it generates a determination signal according to whether the output node is short-circuited to the first predetermined level; and a second switch circuit, which generates a short-circuit detection signal according to the determination signal.Type: ApplicationFiled: February 10, 2012Publication date: May 23, 2013Inventors: Kuo-Chen Tsai, Wei-Lun Hsieh, Tung-Han Tsai, Ming-Jun Hsiao
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Publication number: 20130053575Abstract: The present invention provides a catalyst composition and a method for preparing an amide. The catalyst composition of the present invention including a hydroxylamine salt, sulfuric acid, and a nitrogen-containing heterocyclic compound is used for catalyzing a ketoxime to form an amide in the Beckman rearrangement reaction. The preparation of an amide by using the catalyst composition of the present invention has high conversion rate of a ketoxime, high selectivity of an amide and high tolerance to water.Type: ApplicationFiled: January 27, 2012Publication date: February 28, 2013Applicant: China Petrochemical Development Corporation, Taipei (Taiwan)Inventors: Chien-Chuan Shih, Cheng-Fa Hsieh, Hung-Hung Hseuh, Tung-Han Tsai
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Patent number: 8367865Abstract: The present invention provides a catalyst composition for preparing an amide, including an amino acid ionic liquid having a cation of formula (I) and an anion selected from the group consisting of an inorganic acid group, an organic acid group and a combination thereof, wherein the numbers of the anion and the cation are such that the amino acid ionic liquid is electroneutral; and a Bronsted acid. The present invention also provides a method for preparing an amide in the presence of the catalyst composition, and the method has advantages such as decreasing viscosity of ionic liquid, and increasing conversion rate of ketoximes and selectivity of amides.Type: GrantFiled: November 30, 2009Date of Patent: February 5, 2013Assignee: China Petrichemical Development CorporationInventors: Tung-Han Tsai, Cheng-Fa Hsieh, Chi-Yuan Chen
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Publication number: 20120184733Abstract: The present invention provides a method for preparing an amide. The method includes the steps of performing in a reactor including a catalyst composition having a nitrogen-containing heterocyclic compound and sulfuric acid Beckman rearrangement of a ketoxime to form a product stream having the amide, wherein a molar ratio of the nitrogen-containing heterocyclic compound to the sulfuric acid is from 1:1 to 1:8; and separating an organic phase having the amide and an aqueous phase having the catalyst composition from the product stream. The present invention facilitates the regeneration of the catalyst composition with low water content, so as to increase the conversion rate of a ketoxime and the selectivity of an amide.Type: ApplicationFiled: December 21, 2011Publication date: July 19, 2012Applicant: China Petrochemical Development Corporation, Taipei (Taiwan)Inventors: Tung-Han Tsai, Cheng-Fa Hsieh, Hung-Hung Hseuh, Chien-Chuan Shih
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Publication number: 20110077429Abstract: The present invention provides a catalyst composition for preparing an amide, including an amino acid ionic liquid having a cation of formula (I) and an anion selected from the group consisting of an inorganic acid group, an organic acid group and a combination thereof, wherein the numbers of the anion and the cation are such that the amino acid ionic liquid is electroneutral; and a Bronsted acid. The present invention also provides a method for preparing an amide in the presence of the catalyst composition, and the method has advantages such as decreasing viscosity of ionic liquid, and increasing conversion rate of ketoximes and selectivity of amides.Type: ApplicationFiled: November 30, 2009Publication date: March 31, 2011Applicant: CHINA PETROCHEMICAL DEVELOPMENT CORPORATIONInventors: Tung-Han Tsai, Cheng-Fa Hsieh, Chi-Yuan Chen
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Publication number: 20100063274Abstract: The present invention provides a method for preparing amides, in which an amino acid ionic liquid is used as both a reaction medium and a catalyst to catalyze Beckman rearrangement of a ketoxime, so as to produce an amide. In the method, the rearrangement is conducted by catalyzing a ketoxime with an amino acid ionic liquid having the asymmetric property at a moderate reaction temperature during a short reaction time, so as to produce an amide without adding other catalysts such as concentrate sulfuric acid. The method has advantages such as avoiding corrosion in equipments with pipelines, the high conversion rate of ketoximes and the high selectivity of amides.Type: ApplicationFiled: July 13, 2009Publication date: March 11, 2010Applicant: CHINA PETROCHEMICAL DEVELOPMENT CORPORATION, Taipei(Taiwan)Inventors: Tung-Han Tsai, Pin-To Yao, Cheng-Fa Hsieh