Patents by Inventor Lihao Tang
Lihao Tang 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: 11618732Abstract: A process for the synthesis of N-alkylated lactams via reductive alkylation. The process of the present disclosure may be conducted by the addition of an aldehyde to a lactam in the presence of a catalyst under a reducing atmosphere.Type: GrantFiled: December 8, 2020Date of Patent: April 4, 2023Assignee: AdvanSix Resins & Chemical LLCInventors: Xiawei Zhang, Robert Schutter, Jr., Lihao Tang, Scott Keenan, Xin Li
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Publication number: 20210179562Abstract: A process for the synthesis of N-alkylated lactams via reductive alkylation. The process of the present disclosure may be conducted by the addition of an aldehyde to a lactam in the presence of a catalyst under a reducing atmosphere.Type: ApplicationFiled: December 8, 2020Publication date: June 17, 2021Inventors: Xiawei Zhang, Robert Schutter, JR., Lihao Tang, Scott Keenan, Xin Li
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Publication number: 20190075787Abstract: A composition including a caprolactam-derived solvent and a crop protective active ingredient. An emulsifiable concentrate including a caprolactam-derived solvent, an organic co-solvent, an emulsifier, and a crop protective active ingredient is also provided.Type: ApplicationFiled: September 13, 2018Publication date: March 14, 2019Inventors: Edward Asirvatham, Robert W. Emblidge, Kristi Engelman, Jaime A. Flores-Vasquez, Kevin Kashurba, Scott R. Keenan, James A. Kweeder, Venkata Krishna Sai Pappu, Lihao Tang, Xiawei Zhang
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Patent number: 9738608Abstract: Lactamium based ionic liquids are described. They comprise at least one of: the reaction product of a lactam compound having a formula (IV) wherein n is 1, 2 or 4 to 8, and a Brøsted acid HX; or a Brøsted acid HX, where X is a halide, and a metal halide; where the reaction product is p-toluenesulfonate, halide, or the halometallate; or the reaction product of a lactam compound having a formula (V) wherein the ring has at least C—C one double bond, and n is 1 to 8, and a Brøsted acid HX; or a Brøsted acid HX, where X is a halide, and a metal halide; or the reaction product of a lactam compound having a formula (VI) wherein n is 1 to 8, m is 1 to 8, and the rings can be saturated or unsaturated; and a Brøsted acid HX; or a Brøsted acid HX, where X is a halide, and a metal halide.Type: GrantFiled: November 30, 2015Date of Patent: August 22, 2017Assignee: UOP LLCInventors: Erin M. Broderick, Alakananda Bhattacharyya, Alan B. Levy, Lihao Tang
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Patent number: 9518023Abstract: Lactamium based ionic liquids and methods of making them are described. The ionic liquids comprise at least one of: the reaction product of a lactam compound having a general formula wherein the ring has at least one C?C double bond, or and a Brønsted acid HX; or a Brønsted acid HX where X is a halide, and a metal halide.Type: GrantFiled: May 6, 2014Date of Patent: December 13, 2016Assignee: UOP LLCInventors: Erin M. Broderick, Alakananda Bhattacharyya, Alan B. Levy, Lihao Tang
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Publication number: 20160075659Abstract: Lactamium based ionic liquids are described. They comprise at least one of: the reaction product of a lactam compound having a formula (IV) wherein n is 1, 2 or 4 to 8, and a Brøsted acid HX; or a Brøsted acid HX, where X is a halide, and a metal halide; where the reaction product is p-toluenesulfonate, halide, or the halometallate; or the reaction product of a lactam compound having a formula (V) wherein the ring has at least C—C one double bond, and n is 1 to 8, and a Brøsted acid HX; or a Brøsted acid HX, where X is a halide, and a metal halide; or the reaction product of a lactam compound having a formula (VI) wherein n is 1 to 8, m is 1 to 8, and the rings can be saturated or unsaturated; and a Brøsted acid HX; or a Brøsted acid HX, where X is a halide, and a metal halide.Type: ApplicationFiled: November 30, 2015Publication date: March 17, 2016Inventors: Erin M. Broderick, Alakananda Bhattacharyya, Alan B. Levy, Lihao Tang
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Patent number: 9233928Abstract: Lactamium based ionic liquids are described. They comprise at least one of: the reaction product of a lactam compound having a general formula wherein n is 1 to 8, and a Brønsted acid HX; or a Brønsted acid HX, where X is a halide, and a metal halide; where the reaction product is p-toluenesulfonate, halide, or the halometallate; or the reaction product of a lactam compound having a general formula wherein the ring has at least C—C one double bond, and n is 1 to 8, and a Brønsted acid HX; or a Brønsted acid HX, where X is a halide, and a metal halide; or the reaction product of a lactam compound having a general formula wherein n is 1 to 8, m is 1 to 8, and the rings can be saturated or unsaturated; and a Brønsted acid HX; or a Brønsted acid HX, where X is a halide, and a metal halide.Type: GrantFiled: May 6, 2014Date of Patent: January 12, 2016Assignee: UOP LLCInventors: Erin M. Broderick, Alakananda Bhattacharyya, Alan B. Levy, Lihao Tang
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Publication number: 20150322016Abstract: Lactamium based ionic liquids are described. They comprise at least one of: the reaction product of a lactam compound having a general formula wherein n is 1 to 8, and a Brønsted acid HX; or a Brønsted acid HX, where X is a halide, and a metal halide; where the reaction product is p-toluenesulfonate, halide, or the halometallate; or the reaction product of a lactam compound having a general formula wherein the ring has at least C—C one double bond, and n is 1 to 8, and a Brønsted acid HX; or a Brønsted acid HX, where X is a halide, and a metal halide; or the reaction product of a lactam compound having a general formula wherein n is 1 to 8, m is 1 to 8, and the rings can be saturated or unsaturated; and a Brønsted acid HX; or a Brønsted acid HX, where X is a halide, and a metal halide.Type: ApplicationFiled: May 6, 2014Publication date: November 12, 2015Applicant: UOP LLCInventors: Erin M. Broderick, Alakananda Bhattacharyya, Alan B. Levy, Lihao Tang
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Publication number: 20150322017Abstract: Lactamium based ionic liquids and methods of making them are described. The ionic liquids comprise at least one of: the reaction product of a lactam compound having a general formula wherein the ring has at least one C—C double bond, or and a Brønsted acid HX; or a Brønsted acid HX where X is a halide, and a metal halide.Type: ApplicationFiled: May 6, 2014Publication date: November 12, 2015Applicant: UOP LLCInventors: Erin M. Broderick, Alakananda Bhattacharyya, Alan B. Levy, Lihao Tang
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Patent number: 8709236Abstract: A process for removing a nitrogen compound from a fuel feed, such as vacuum gas oil or diesel fuel, wherein the process includes contacting the fuel feed comprising the nitrogen compound with a fuel-immiscible caprolactamium ionic liquid to produce a fuel and fuel-immiscible caprolactamium ionic liquid mixture, and separating the mixture to produce a vacuum gas oil or a diesel effluent having a reduced nitrogen content relative to the vacuum gas oil or diesel feed. The invention provides an alternate use for caprolactamium ionic liquid that is produced in large quantities for the manufacture of caprolactam.Type: GrantFiled: March 26, 2012Date of Patent: April 29, 2014Assignee: UOP LLCInventors: Manuela Serban, Alan B. Levy, Lihao Tang, Alakananda Bhattacharyya
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Publication number: 20130248423Abstract: A process for removing a nitrogen compound from a fuel feed, such as vacuum gas oil or diesel fuel, wherein the process includes contacting the fuel feed comprising the nitrogen compound with a fuel-immiscible caprolactamium ionic liquid to produce a fuel and fuel-immiscible caprolactamium ionic liquid mixture, and separating the mixture to produce a vacuum gas oil or a diesel effluent having a reduced nitrogen content relative to the vacuum gas oil or diesel feed. The invention provides an alternate use for caprolactamium ionic liquid that is produced in large quantities for the manufacture of caprolactam.Type: ApplicationFiled: March 26, 2012Publication date: September 26, 2013Applicant: UOP LLCInventors: Manuela Serban, Alan B. Levy, Lihao Tang, Alakananda Bhattacharyya
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Patent number: 8273678Abstract: The reaction product of the reaction product of A.) a ligand of the formula (I), wherein R1, R2, R3, and R4 in each occurrence independently are the same or different hydrocarbyl substituents of 1 to 20 carbon atoms, hydrogen, halogen, or alkoxy groups of 1 to 8 carbon atoms; X in each occurrence independently is CR6 with R6 being hydrogen or an alkyl group of 1 to 8 carbon atoms; and R5 is an organic divalent group of 4 to 40 carbon atoms with the proviso that the two nodes X are not bound to the same atom or to vicinal atoms in the group R5; B.) an aluminum compound of the formula AlR7R8R9, wherein R7, R8 and R9 each independently is a C1 to C12 hydrocarbyl group, hydrogen, halogen, or an alkoxy group of 1 to 20 carbon atoms; and C.) a Lewis base selected from the group consisting of amines, phosphines, amides, nitriles, isonitriles, and alcohols is useful as a polymerization catalyst, particularly for the homopolymerization or copolymerization of an alkylene oxide.Type: GrantFiled: February 28, 2008Date of Patent: September 25, 2012Assignee: Dow Global Technologies LLCInventors: Eric P. Wasserman, Yang Cheng, Lihao Tang
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Publication number: 20100197873Abstract: The reaction product of the reaction product of A.) a ligand of the formula (I), wherein R1, R2, R3, and R4 in each occurrence independently are the same or different hydrocarbyl substituents of 1 to 20 carbon atoms, hydrogen, halogen, or alkoxy groups of 1 to 8 carbon atoms; X in each occurrence independently is CR6 with R6 being hydrogen or an alkyl group of 1 to 8 carbon atoms; and R5 is an organic divalent group of 4 to 40 carbon atoms with the proviso that the two nodes X are not bound to the same atom or to vicinal atoms in the group R5; B.) an aluminum compound of the formula AlR7R8R9, wherein R7, R8 and R9 each independently is a C1 to C12 hydrocarbyl group, hydrogen, halogen, or an alkoxy group of 1 to 20 carbon atoms; and C.) a Lewis base selected from the group consisting of amines, phosphines, amides, nitriles, isonitriles, and alcohols is useful as a polymerization catalyst, particularly for the homopolymerization or copolymerization of an alkylene oxide.Type: ApplicationFiled: February 28, 2008Publication date: August 5, 2010Inventors: Eric P. Wasserman, Yang Cheng, Lihao Tang