Patents by Inventor Karl Tze-Tang Chuang
Karl Tze-Tang Chuang 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: 9266804Abstract: A dual-bed catalytic distillation tower has a catalytic column having an upper catalytic bed filled with low temperature dehydration catalysts and a lower catalytic bed filled with high temperature dehydration catalysts. When using the dual-bed catalytic distillation tower, the feeding may be fed to the tower at the top of the upper catalytic bed, between the upper and lower catalytic beds, or at the bottom of the lower catalytic bed for dehydration to obtain DME. The dual-bed catalytic distillation tower has the advantage of flexible set-up depending on various feedings such as anhydrous or crude methanol and on different grades of DME to be obtained.Type: GrantFiled: September 30, 2013Date of Patent: February 23, 2016Assignee: CPC CorporationInventors: Wei-Bin Su, Karl Tze-Tang Chuang, Tzong-Bin Lin, Cheng-Tsung Hong, Hung-Chung Shen, Yung-Sheng Ho
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Patent number: 9193660Abstract: A carboxylic acid e.g. acetic acid, is recovered from an aqueous feed stream containing the corresponding ester, an alcohol and a small amount of water by catalytically dehydrating the alcohol to the corresponding ether and water, and reacting the water with the ester to generate a liquid carboxylic acid rich product stream. The acid is recovered by distillation. In a second embodiment, additional alcohol and/or water are co-fed with the feed or fed directly to a catalytic distillation column, resulting in a liquid bottom product stream of substantially pure acetic acid and a top distillate stream of substantially pure ether.Type: GrantFiled: June 20, 2013Date of Patent: November 24, 2015Assignee: AMT International Inc.Inventors: Kuang-Yeu Wu, Pai-Yu Polly Chiang, Ji-Young Jang, Karl Tze-Tang Chuang
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Patent number: 9181159Abstract: This invention describes a method for co-producing isobutene and methyl tert-butyl ether in a catalytic distillation column, wherein contacting with solid acid catalysts the charged tert-butanol mixture undergoes dehydration and etherification. The mixture of isobutene and methyl tert-butyl ether withdrawn from the column top can be further separated, thus high purity isobutene and fuel-additive methyl tert-butyl ether are obtained.Type: GrantFiled: January 23, 2014Date of Patent: November 10, 2015Assignee: CPC Corporation, TaiwanInventors: Wei-Bin Su, Karl Tze-Tang Chuang, Cheng-Tsung Hong, Jeng-Cheng Lee
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Patent number: 9169183Abstract: This invention describes a method for co-producing isobutene and ethyl tert-butyl ether from tert-butanol mixture in a catalytic distillation column, wherein catalyzing the tert-butanol mixture with the ethanol undergoes dehydration and etherification. The tert-butanol mixture contains absolute ethanol or aqueous ethanol as the antifreeze agent. The isobutene and the ethyl tert-butyl ether withdrawn from the column top are further separated, thus high purity isobutene and ethyl tert-butyl ether for fuel-additive are obtained.Type: GrantFiled: October 27, 2014Date of Patent: October 27, 2015Assignee: CPC CORPORATION, TAIWANInventors: Wei-Bin Su, Karl Tze-Tang Chuang, Chung-Chen Lai, Yung-Sheng Ho
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Publication number: 20150203426Abstract: This invention describes a method for co-producing isobutene and methyl tert-butyl ether in a catalytic distillation column, wherein contacting with solid acid catalysts the charged tert-butanol mixture undergoes dehydration and etherification. The mixture of isobutene and methyl tert-butyl ether withdrawn from the column top can be further separated, thus high purity isobutene and fuel-additive methyl tert-butyl ether are obtained.Type: ApplicationFiled: January 23, 2014Publication date: July 23, 2015Applicant: CPC CORPORATION, TAIWANInventors: WEI-BIN SU, KARL TZE-TANG CHUANG, CHENG-TSUNG HONG, JENG-CHENG LEE
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Patent number: 9067846Abstract: Various substantially styrene-, methylstyrene- and ethylbenzene-free C6-C9 aromatic hydrocarbon blends are produced from a hydrocarbon feed stream containing C5-C9 aromatic hydrocarbons including styrene, methylstyrene and sulphur compounds by first separating the stream into a distillate containing C5-C7 hydrocarbons, and a bottoms fraction containing C8 and C9 hydrocarbons; and converting the styrene and methylstyrene to their corresponding ethers by reacting with a C1-C3 lower alcohol in the presence of a selective acidic etherification catalyst. The effluent may be sent to a gasoline pool for blending or the effluent is separated by distillation into an ether stream and either a C8 or a C8-C9 aromatic hydrocarbon rich stream. The C5-C7 distillate is hydrogenated.Type: GrantFiled: June 7, 2013Date of Patent: June 30, 2015Assignees: AMT International Inc., CPC Corporation, TaiwanInventors: Karl Tze-Tang Chuang, Tzong-Bin Lin, Cheng-Tsung Hong, Yung-Sheng Ho, Kuang-Yeu Wu
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Publication number: 20150175502Abstract: A method for making high purity dicyclopentadiene comprises the following steps: providing a dimer feedstock comprising dicyclopentadiene and methyl dicyclopentadiene; blending the dimer feedstock and a diluent to obtain a first blend; cracking the first blend in a vapor phase at 300° C. to 400° C. to obtain a cracked feedstock; separating the cracked feedstock into a second blend and a third blend; dimerizing the second blend at 50° C. to 120° C. to obtain a fourth blend; and separating the fourth blend to obtain a recycled diluent and high purity dicyclopentadiene. By using saturated C5 hydrocarbon, saturated C6 hydrocarbon, benzene and the mixture thereof as the diluent and the steps mentioned above, the clogging problem of cracker tubes is solved and the cost of makeup diluent usage is lowered.Type: ApplicationFiled: August 28, 2014Publication date: June 25, 2015Inventors: Jyh-Haur HWANG, Wei-Bin SU, Chi-Yu CHEN, Karl Tze-Tang CHUANG, Cheng-Tsung HONG, Yung-Sheng HO
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Publication number: 20140378703Abstract: A carboxylic acid e.g. acetic acid, is recovered from an aqueous feed stream containing the corresponding ester, an alcohol and a small amount of water by catalytically dehydrating the alcohol to the corresponding ether and water, and reacting the water with the ester to generate a liquid carboxylic acid rich product stream. The acid is recovered by distillation. In a second embodiment, additional alcohol and/or water are co-fed with the feed or fed directly to a catalytic distillation column, resulting in a liquid bottom product stream of substantially pure acetic acid and a top distillate stream of substantially pure ether.Type: ApplicationFiled: June 20, 2013Publication date: December 25, 2014Inventors: Kuang-Yeu WU, Pai-Yu Polly Chiang, Ji-Young Jang, Karl Tze-Tang Chuang
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Publication number: 20140364664Abstract: Various substantially styrene-, methylstyrene- and ethylbenzene-free C6-C9 aromatic hydrocarbon blends are produced from a hydrocarbon feed stream containing C5-C9 aromatic hydrocarbons including styrene, methylstyrene and sulphur compounds by first separating the stream into a distillate containing C5-C7 hydrocarbons, and a bottoms fraction containing C8 and C9 hydrocarbons; and converting the styrene and methylstyrene to their corresponding ethers by reacting with a C1-C3 lower alcohol in the presence of a selective acidic etherification catalyst. The effluent may be sent to a gasoline pool for blending or the effluent is separated by distillation into an ether stream and either a C8 or a C8-C9 aromatic hydrocarbon rich stream. The C5-C7 distillate is hydrogenated.Type: ApplicationFiled: June 7, 2013Publication date: December 11, 2014Inventors: Karl Tze-Tang CHUANG, Tzong-Bin LIN, Cheng-Tsung HONG, Yung-Sheng HO, Kuang-Yeu WU
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Patent number: 8766028Abstract: The invention disclosed relates to a process for refining a hydrocarbon feed to make substantially styrene-free C6-C8 aromatic hydrocarbons (BTX). The hydrocarbon feed, for example, unhydrotreated pyrolysis gasoline, is distilled to make a BTX rich stream containing styrene which is fractionated to separate C6 and C7 hydrocarbons from C8 hydrocarbons including styrene. Styrene in the C8 hydrocarbons reacts in the presence of a selective etherification catalyst with a C1-C3 lower alkyl alcohol to form the corresponding styrene ether, which is then separated by distillation into a styrene ether stream and a C8 hydrocarbons rich stream. The C8 hydrocarbons rich stream is then re-mixed with the C6 and C7 hydrocarbons, and sent to hydrogenation reactors to remove sulphur and olefinic hydrocarbons to form substantially styrene-free BTX.Type: GrantFiled: November 4, 2011Date of Patent: July 1, 2014Assignees: AMT International Inc., CPC CorporationInventors: Kuang-Yeu Wu, Adam T. Lee, Karl Tze-Tang Chuang, Hung-Chung Shen, Tzong-Bin Lin
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Publication number: 20140058137Abstract: A dual-bed catalytic distillation tower has a catalytic column having an upper catalytic bed filled with low temperature dehydration catalysts and a lower catalytic bed filled with high temperature dehydration catalysts. When using the dual-bed catalytic distillation tower, the feeding may be fed to the tower at the top of the upper catalytic bed, between the upper and lower catalytic beds, or at the bottom of the lower catalytic bed for dehydration to obtain DME. The dual-bed catalytic distillation tower has the advantage of flexible set-up depending on various feedings such as anhydrous or crude methanol and on different grades of DME to be obtained.Type: ApplicationFiled: September 30, 2013Publication date: February 27, 2014Applicant: CPC Corporation, TaiwanInventors: Wei-Bin SU, Karl Tze-Tang Chuang, Tzong-Bin Lin, Cheng-Tsung Hong, Hung-Chung Shen, Yung-Sheng Ho
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Patent number: 8506766Abstract: A method for recovering acetic acid from an aqueous feed stream containing acetic acid and, in particular, a stream generated during terephthalic acid production includes feeding a water-rich feed stream to a liquid-liquid extraction column, which includes a guard bed near the top thereof for conversion of alcohol within the feed stream by reaction with acetic acid to the corresponding ester, and removing residual water from acetic acid in an azeotropic distillation column by feeding water-poor feed streams from the extraction column to the distillation column at a height at which the mixture has a similar water concentration. The liquid-liquid extraction column produces an extract of an extraction solvent and acetic acid which is sent to the azeotropic distillation column to separate residual water and acetic acid.Type: GrantFiled: September 14, 2012Date of Patent: August 13, 2013Assignee: AMT International Inc.Inventors: Kuang-Yeu Wu, Ji-Young Jang, Karl Tze-Tang Chuang
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Publication number: 20130116489Abstract: The invention disclosed relates to a process for refining a hydrocarbon feed to make substantially styrene-free C6-C8 aromatic hydrocarbons (BTX). The hydrocarbon feed, for example, unhydrotreated pyrolysis gasoline, is distilled to make a BTX rich stream containing styrene which is fractionated to separate C6 and C7 hydrocarbons from C8 hydrocarbons including styrene. Styrene in the C8 hydrocarbons reacts in the presence of a selective etherification catalyst with a C1-C3 lower alkyl alcohol to form the corresponding styrene ether, which is then separated by distillation into a styrene ether stream and a C8 hydrocarbons rich stream. The C8 hydrocarbons rich stream is then re-mixed with the C6 and C7 hydrocarbons, and sent to hydrogenation reactors to remove sulphur and olefinic hydrocarbons to form substantially styrene-free BTX.Type: ApplicationFiled: November 4, 2011Publication date: May 9, 2013Inventors: Kuang-Yeu Wu, Adam T. Lee, Karl Tze-Tang Chuang, Hung-Chung Shen, Tzong-Bin Lin
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Publication number: 20130012738Abstract: A method for recovering acetic acid from an aqueous feed stream containing acetic acid and, in particular, a stream generated during terephthalic acid production includes feeding a water-rich feed stream to a liquid-liquid extraction column, which includes a guard bed near the top thereof for conversion of alcohol within the feed stream by reaction with acetic acid to the corresponding ester; and removing residual water from acetic acid in an azeotropic distillation column by feeding water-poor feed streams from the extraction column to the distillation column at a height at which the mixture has a similar water concentration. The liquid-liquid extraction column produces an extract comprising an extraction solvent and acetic acid which is sent to the azeotropic distillation column to separate residual water and acetic acid.Type: ApplicationFiled: September 14, 2012Publication date: January 10, 2013Inventors: Kuang-Yeu Wu, Ji-Young Jang, Karl Tze-Tang Chuang
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Patent number: 8318384Abstract: The present disclosure relates to an ion conductive material useful as an anode catalyst comprising LaCrO3, a vanadium oxide (VOx) and a solid electrolyte, and methods of making the same. The catalysts are useful in solid oxide fuels cells and, in particular, using impure hydrogen.Type: GrantFiled: April 30, 2008Date of Patent: November 27, 2012Assignee: The Governors of the University of AlbertaInventors: Jing-Li Luo, Karl Tze-tang Chuang, Zhengrong Xu, Alan Sanger
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Patent number: 8268131Abstract: The invention disclosed relates to an apparatus and method for recovering acetic acid from an aqueous feed stream containing acetic acid, in particular a stream generated during terephthalic acid production. The apparatus includes: a liquid-liquid extraction column to which water-rich feed streams are fed, having a guard bed situated near the top and within the extraction column for conversion by reaction with acetic acid of alcohol within the mixture to the corresponding ester; and an azeotropic distillation column to remove residual water from acetic acid, to which water-poor feed streams are fed directly at a height of the azeotropic distillation column at which the mixture therein has a similar water concentration. The liquid-liquid extraction column produces an extract comprising an extraction solvent and acetic acid which is sent to the azeotropic distillation column to separate residual water and acetic acid.Type: GrantFiled: March 24, 2009Date of Patent: September 18, 2012Assignee: AMT International, Inc.Inventors: Ji-Young Jang, Kuang-Yeu Wu, Karl Tze-tang Chuang
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Publication number: 20100249457Abstract: The invention disclosed relates to an apparatus and method for recovering acetic acid from an aqueous feed stream containing acetic acid, in particular a stream generated during terephthalic acid production. The apparatus includes: a liquid-liquid extraction column to which water-rich feed streams are fed, having a guard bed situated near the top and within the extraction column for conversion by reaction with acetic acid of alcohol within the mixture to the corresponding ester; and an azeotropic distillation column to remove residual water from acetic acid, to which water-poor feed streams are fed directly at a height of the azeotropic distillation column at which the mixture therein has a similar water concentration. The liquid-liquid extraction column produces an extract comprising an extraction solvent and acetic acid which is sent to the azeotropic distillation column to separate residual water and acetic acid.Type: ApplicationFiled: March 24, 2009Publication date: September 30, 2010Inventors: Ji-Young Jang, Kuang-Yeu Wu, Karl Tze-tang Chuang
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Publication number: 20100143820Abstract: The present disclosure relates to an ion conductive material useful as an anode catalyst comprising LaCrO3, a vanadium oxide (VOx) and a solid electrolyte, and methods of making the same. The catalysts are useful in solid oxide fuels cells and, in particular, using impure hydrogen.Type: ApplicationFiled: April 30, 2008Publication date: June 10, 2010Applicant: THE GOVERNORS OF THE UNIVERSITY OF ALBERTAInventors: Jing-Li Luo, Karl Tze-tang Chuang, Zhengrong Xu, Alan Sanger
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Patent number: 7666297Abstract: An improved oxidative process that employ a robust, non-aqueous, and oil-soluble organic peroxide oxidant for effective desulfurization and denitrogenation of hydrocarbons including petroleum fuels, hydrotreated vacuum gas oil (VGO), non-hydrotreated VGO, petroleum crude oil, synthetic crude oil from oil sand, and residual oil. Even at low concentrations and without the assistance of catalysts, the non-aqueous organic peroxide oxidant is extremely active and fast in oxidizing the sulfur and nitrogen compounds in the hydrocarbon feedstocks. Furthermore, the process generates a valuable organic acid by-product that is also used internally as the extractive solvent for effective removal of the oxidized sulfur and nitrogen from the hydrocarbons without the need of a final adsorption step. Novel process steps are also disclosed to substantially prevent yield loss in the oxidative process.Type: GrantFiled: December 21, 2006Date of Patent: February 23, 2010Assignee: CPC Corporation, TaiwanInventors: Fu-Ming Lee, Tzong-Bin Lin, Hsun-Yi Huang, Jyh-Haur Hwang, Hung-Chung Shen, Karl Tze-Tang Chuang
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Publication number: 20100041919Abstract: An apparatus and process are described for recovery of a carboxylic acid by hydrolysis of an ester in a mixture comprising the ester, an alcohol and water. The apparatus comprises a catalytic distillation column containing an acidic catalyst and a distillation column. Simultaneously and interdependently the alcohol is catalytically dehydrated to the corresponding ether and water, and said water reacts with the ester to generate a carboxylic acid rich stream from the catalytic distillation column. The acid is recovered by distillation in the distillation column. The process requires no added water. A second embodiment of the apparatus and process has means to co-feed one or both of added methanol and/or water with the feed to maintain substantially optimum operation independent of feed composition.Type: ApplicationFiled: August 13, 2009Publication date: February 18, 2010Applicant: AMT INTERNATIONAL, INC.Inventors: Kuang-Yeu WU, Pai-Yu Polly CHIANG, Ji-Young JANG, Karl Tze-tang CHUANG