Patents by Inventor Shien-Chang Chen
Shien-Chang Chen 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: 9150473Abstract: A method for producing allyl alcohol is disclosed. The method includes steps of feeding allyl acetate and water into a reactive distillation column; performing a reaction in a reaction zone and separating a product containing allyl alcohol, acetic acid and water from the reactive distillation column. Accordingly, the method effectively enhances a conversion rate of hydrolysis for allyl acetate, simplifies the process and reduces energy consumption.Type: GrantFiled: March 21, 2014Date of Patent: October 6, 2015Assignee: Dairen Chemical CorporationInventors: Shien-Chang Chen, Tian-Yuan Lin, Shih-Bo Hung
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Publication number: 20140364655Abstract: A method for producing allyl alcohol is disclosed. The method includes steps of feeding allyl acetate and water into a reactive distillation column; performing a reaction in a reaction zone and separating a product containing allyl alcohol, acetic acid and water from the reactive distillation column. Accordingly, the method effectively enhances a conversion rate of hydrolysis for allyl acetate, simplifies the process and reduces energy consumption.Type: ApplicationFiled: March 21, 2014Publication date: December 11, 2014Applicant: Dairen Chemical CorporationInventors: Shien-Chang Chen, Tian-Yuan Lin, Shih-Bo Hung
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Patent number: 7265243Abstract: This invention relates to a catalyst which comprises palladium metal as the main catalyst, tin metal or a mixture of tin and additional metals as the promoter, in combination with an alkali or alkaline earth metal compound, supported on the outer surface of a porous carrier. The catalyst is used in the process for producing allyl acetate through the oxacylation of propylene, acetic acid and oxygen in a vapor phase. The catalyst of the present invention exhibits high catalytic activity, high catalytic selectivity and high catalytic life, which greatly increases the economic utility of the oxacylation process.Type: GrantFiled: March 1, 2004Date of Patent: September 4, 2007Assignee: Dairen Chemical CorporationInventors: Shien-Chang Chen, Fu-Shen Lin, Liang-An Hsu, Pi-Fwu Jang
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Patent number: 6998461Abstract: Disclosed are a modified polyester fiber and a process for producing the same. The modified polyester fiber comprises the component of alkoxylated 2-methyl-1,3-propanediol and has the properties of easy dyeability at low temperatures and good colorfastness to laundering. The modified polyester fiber can be produced by undergoing a polymerization reaction of alkoxylated 2-methyl-1,3-propanediol, alkanediol, and terephthalic acid or an alkyl ester thereof, and then spinning. The modified polyester fiber can be dyed at low temperature and has excellent dyeability and colorfastness to laundering. Therefore, this modified polyester fiber can be widely used in the application of synthetic fiber product.Type: GrantFiled: June 12, 2003Date of Patent: February 14, 2006Assignee: Dairen Chemical CorporationInventors: Shien Chang Chen, June Yen Chou, Hsing Yun Wang, Nan Min Chen
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Publication number: 20040236121Abstract: This invention relates to a catalyst which comprises palladium metal as the main catalyst, tin metal or a mixture of tin and additional metals as the promoter, in combination with an alkali or alkaline earth metal compound, supported on the outer surface of a porous carrier. The catalyst is used in the process for producing allyl acetate through the oxacylation of propylene, acetic acid and oxygen in a vapor phase. The catalyst of the present invention exhibits high catalytic activity, high catalytic selectivity and high catalytic life, which greatly increases the economic utility of the oxacylation process.Type: ApplicationFiled: March 1, 2004Publication date: November 25, 2004Applicant: Dairen Chemical CorporationInventors: Shien-Chang Chen, Fu-Shen Lin, Liang-An Hsu, Pi-Fwu Jang
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Publication number: 20040204560Abstract: Disclosed are a modified polyester fiber and a process for producing the same. The modified polyester fiber comprises the component of alkoxylated 2-methyl-1,3-propanediol and has the properties of easy dyeability at low temperatures and good colorfastness to laundering. The modified polyester fiber can be produced by undergoing a polymerization reaction of alkoxylated 2-methyl-1,3-propanediol, alkanediol, and terephthalic acid or an alkyl ester thereof, and then spinning. The modified polyester fiber can be dyed at low temperature and has excellent dyeability and colorfastness to laundering. Therefore, this modified polyester fiber can be widely used in the application of synthetic fiber product.Type: ApplicationFiled: June 12, 2003Publication date: October 14, 2004Inventors: Shien Chang Chen, June Yen Chou, Hsing Yun Wang, Nan Min Chen
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Publication number: 20030148882Abstract: This invention relates to a catalyst which comprises palladium metal as the main catalyst, tin metal or a mixture of tin and additional metals as the promoter, in combination with an alkali or alkaline earth metal compound, supported on the outer surface of a porous carrier. The catalyst is used in the process for producing allyl acetate through the oxacylation of propylene, acetic acid and oxygen in a vapor phase. The catalyst of the present invention exhibits high catalytic activity, high catalytic selectivity and high catalytic life, which greatly increases the economic utility of the oxacylation process.Type: ApplicationFiled: December 3, 1999Publication date: August 7, 2003Inventors: SHIEN-CHANG CHEN, FU-SHEN LIN, LIANG-AN HSU, PI-FWU JANG
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Publication number: 20020120154Abstract: The present invention is related to a method for preparing lactam represented by the following formula: 1Type: ApplicationFiled: December 14, 2001Publication date: August 29, 2002Applicant: Dairen Chemical CorporationInventors: Shien-Chang Chen, Fu-Shen Lin, Liang-An Hsu, Cheng-Lin Tsai, Joe-Min Lin
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Patent number: 6350883Abstract: The present invention is related to a method for preparing lactam represented by the following formula: wherein R is C2-10 alkylene which may be optionally substituted with C1-6 alkyl or phenyl; R′ is a hydrogen atom, C1-6 alkyl, C1-6 hydroxyalkyl or phenyl. The method for preparing lactam comprises an amination reaction using crystalline aluminosilicate zeolites as catalysts under the condition of gas phase in the presence of (a) lactone, (b) amine and/or ammonia and (c) water.Type: GrantFiled: November 22, 2000Date of Patent: February 26, 2002Assignee: Dairen Chemical CorporationInventors: Shien-Chang Chen, Fu-Shen Lin, Liang-An Hsu, Cheng-Lin Tsai, Joe-Min Lin
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Patent number: 6323347Abstract: The present invention relates to a catalyst for preparing a lactone, which is prepared by supporting a cupric compound, a zinc compound and at least one alkaline earth metal compound on the supporter. The present invention also relates to a method for preparing a lactone, which comprises a dehydrocyclization reaction of a diol under a gas phase in the presence of the aforementioned catalyst after activating said catalyst. The catalyst for preparing lactone of the present invention is quite economic because of its high activity, long lifetime and high selectivity of products.Type: GrantFiled: December 15, 2000Date of Patent: November 27, 2001Assignee: Dairen Chemical CorporationInventors: Shien-Chang Chen, Fu-Shen Lin, Liang-An Hsu, Cheng-Lin Tsai
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Patent number: 6313262Abstract: The present invention is related to a method for preparing polyether polyol or copolymerized polyether polyol, which uses an acid catalyst consisting of heteropoly acidic salts and oxides and/or binders. It allows tetrahydrofuran and/or cyclic ether compounds to carry out the ring-opening polymerization or ring-opening copolymerization with/without telogen, and obtains polyether polyol or copolymerized polyether polyol. An acid catalyst is used in the present invention because of its low solubility in organic solvent, so its process is simpler and the catalyst is easy to recycle for repeated use. As well, its preparation process is highly advantageous.Type: GrantFiled: November 23, 1999Date of Patent: November 6, 2001Assignee: Dairen Chemical CorporationInventors: Shien Chang Chen, Fu Shen Lin, June Yen Chou, Liang An Hsu, Ming Hui Chu, Chine Chung Huang, Ming Hsiung Shao
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Patent number: 6303536Abstract: This invention relates to a preparation process of a catalyst which comprises a noble metal and a metal as catalysis promoter in combination with an alkali or alkaline earth metal compound, supported on the outer surface of a carrier. The preparation process comprises impregnating the carrier with a solution containing an oxidative state noble metal as the main catalyst and an oxidative state metal as catalysis promoter, reducing the oxidative state metals into the metallic state in gaseous phase with a gaseous reducing agent under certain temperature, pressure, moisture and gas concentration, then impregnating the reduced carrier with a solution of an alkali or alkaline earth metal compound. The metal components-supporting catalyst prepared by the process according to the present invention has a high surface area and exhibits high catalytic activity, which leads to increase the catalytic efficiency and life of this heterogeneous catalyst.Type: GrantFiled: August 16, 1999Date of Patent: October 16, 2001Assignee: Dairen Chemical CoorporationInventors: Shien-Chang Chen, Fu-Shen Lin, Yuh-Lih Jong, Pi-Fwu Jang
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Publication number: 20010009964Abstract: The present invention relates to a catalyst for preparing a lactone, which is prepared by supporting a cupric compound, a zinc compound and at least one alkaline earth metal compound on the supporter. The present invention also relates to a method for preparing a lactone, which comprises a dehydrocyclization reaction of a diol under a gas phase in the presence of the aforementioned catalyst after activating said catalyst. The catalyst for preparing lactone of the present invention is quite economic because of its high activity, long lifetime and high selectivity of products.Type: ApplicationFiled: December 15, 2000Publication date: July 26, 2001Applicant: DAIREN CHEMICAL CORPORATIONInventors: Shien-Chang Chen, Fu-Shen Lin, Liang-An Hsu, Cheng-Lin Tsai
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Patent number: 5916677Abstract: This invention relates to a process for producing polyester fibers with enhanced dyeability, lesser elongation and greater strength, which comprises combining 2-methyl-1,3-propanediol into a mixture containing terephthalic acid, or an alkyl ester thereof, and a (C.sub.2-6)alkanediol, and carrying out polymerization. The resultant polyester copolymer is then spun to produce polyester fibers. This invention also relates to the polyester fibers produced by this process. These polyester fibers exhibit enhanced dyeability, lesser elongation and greater strength than un-improved polyester fibers.Type: GrantFiled: September 11, 1998Date of Patent: June 29, 1999Assignee: Dairen Chemical CorporationInventors: Shien Chang Chen, Fu Shen Lin, June-Yen Chou, Hsing Yun Wang, Mao Song Lee, Mei-Sui Chen, Yann Jyh Huang, Hung Shu Sun
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Patent number: 5917061Abstract: This invention is directed to a process for producing cyclic ethers by liquid phase reaction, which comprises using a crystalline aluminosilicate zeolite as the catalyst, and subjecting an alkanediol to cyclodehydration at a temperature less than the boiling point of the alkanediol to obtain the corresponding cyclic ether.Type: GrantFiled: April 28, 1998Date of Patent: June 29, 1999Assignee: Dairen Chemical CorporationInventors: Shien Chang Chen, Cheng Chang Chu, Fu Shen Lin, June Yen Chou, Ming Hui Chu
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Patent number: 5888923Abstract: The present invention relates to a modified Raney nickel catalyst which can serves as hydrogenation catalyst for hydroxy aldehydes, such as 4-hydroxy-butanal, and 2-methyl-3-hydroxypropanal and hydroxy cyclic ethers such as 2-hydroxy-tetrahydrofuran. Further, a process for preparing diols by using the modified Raney nickel catalyst is provided.Type: GrantFiled: April 15, 1996Date of Patent: March 30, 1999Assignee: Dairen Chemical CorporationInventors: Shien Chang Chen, C. C. Chu, F. S. Lin, J. Y. Chou, C. C. Huang
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Patent number: 5144062Abstract: A process for the preparation of methyl formate by the vapor phase dehydrogenation of methanol in the presence of a catalyst composed of copper oxide, a chromium oxide and a sodium compound is described.Type: GrantFiled: September 7, 1990Date of Patent: September 1, 1992Assignee: Dairen Chemical CorporationInventors: Shien-Chang Chen, Wan-Jy Cheng, Fu-Shen Lin, Fu-Juh Huang
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Patent number: 4999177Abstract: A process is disclosed for the preparation of high purity carbon monoxide by heating methyl formate in the presence of a catalyst of a precious metal compound with or without a promoter of alkali or alkaline earth metal compound.Type: GrantFiled: April 10, 1989Date of Patent: March 12, 1991Assignee: Dairen Chemical CorporationInventors: Shien-Chang Chen, Wan-Jy Cheng, Fu-Shen Lin, Fu-Juh Huang