Patents by Inventor Mou Paul
Mou Paul 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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Composite polyamide membrane made via interfacial polymerization using a blend of non-polar solvents
Patent number: 10137418Abstract: A method for making a composite polyamide membrane comprising a porous support and a thin film polyamide layer, wherein the method includes: i) applying a polar solution comprising a polyfunctional amine monomer, and a non-polar solution comprising a polyfunctional acyl halide monomer to a surface of a porous support and interfacially polymerizing the monomers to form a thin film polyamide layer, wherein the non-polar solution further comprises at least 50 vol % of a C5 to C20 aliphatic hydrocarbon and from 2 to 25 vol % of benzene or benzene substituted with one or more C1 to C6 alkyl groups; and ii) applying an aqueous solution of nitrous acid to the thin film polyamide layer.Type: GrantFiled: January 3, 2014Date of Patent: November 27, 2018Assignee: DOW GLOBAL TECHNOLOGIES LLCInventors: Abhishek Roy, Yasushi Maeda, Mou Paul, Steven Rosenberg, Ian A. Tomlinson -
Patent number: 9981227Abstract: A thin film composite polyamide membrane comprising a porous support and a thin film polyamide layer characterized by possessing: i) an azo (—N?N—) content of from 0.40% to 1.00%, as measured by pyrolysis gas chromatography; and ii) a dissociated carboxylate content of at least 0.40 mol/kg as measured by RBS at pH 9.5.Type: GrantFiled: December 15, 2014Date of Patent: May 29, 2018Assignee: Dow Global Technologies LLCInventors: Mou Paul, Robert C. Cieslinski, Bruce B. Gerhart, David D. Hawn, XiaoHua Qiu, Mark A. Rickard, Steven Rosenberg, Abhishek Roy, Ian A. Tomlinson, Chengli Zu
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Patent number: 9943810Abstract: A method for making a composite polyamide membrane comprising a porous support and a polyamide layer, including the steps of: i) applying a polar solution comprising a polyfunctional amine monomer and a non-polar solution comprising a polyfunctional acyl halide monomer to a surface of a porous support and interfacially polymerizing the monomers to form a polyamide layer; and ii) exposing the thin film polyamide layer to nitrous acid; wherein the method is characterized by at least one of: conducting the interfacial polymerization of step i) in the presence of a subject amine compound, or applying a subject amine compound to the interfacially polymerized polyamide layer prior to step ii), wherein the subject amine compound is different from the polyfunctional acyl halide and polyfunctional amine monomers.Type: GrantFiled: May 5, 2015Date of Patent: April 17, 2018Assignee: Dow Global Technologies LLCInventors: Mou Paul, Matthew J. Jansma, Abhishek Roy, Ian A. Tomlinson
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Patent number: 9925500Abstract: A method for making a composite polyamide membrane including a porous support and a thin film polyamide layer including the steps of applying a polyfunctional amine monomer and a combination amine-reactive compounds to a surface of the porous support and reacting the constituents to form a thin film polyamide layer, wherein the amine-reactive compounds include: i) a polyfunctional amine-reactive monomer including two to three amine-reactive moieties selected from acyl halide, sulfonyl halide and anhydride, ii) a polyfunctional amine-reactive monomer including at least four amine-reactive moieties selected from acyl halide, sulfonyl halide and anhydride, and iii) an acid compound including at least on carboxylic acid moiety or salt thereof and at least one amine-reactive moiety selected from acyl halide and sulfonyl halide.Type: GrantFiled: July 3, 2013Date of Patent: March 27, 2018Assignee: Dow Global Technologies LLCInventors: Mou Paul, Tina L. Arrowood, Robert C. Cieslinski, Steven D. Jons, Steven Rosenberg, Abhishek Roy, Ian A. Tomlinson
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Patent number: 9895666Abstract: A method for making a composite polyamide membrane comprising a porous support and a thin film polyamide layer, wherein the method includes the steps of applying a polar solution comprising a polyfunctional amine monomer and a non-polar solution comprising a polyfunctional acyl halide monomer to a surface of a porous support and interfacially polymerizing the monomers to form a thin film polyamide layer. The method is characterized by including a substituted benzamide monomer within the non-polar solution.Type: GrantFiled: January 3, 2014Date of Patent: February 20, 2018Assignee: Dow Global Technologies LLCInventors: Abhishek Roy, Tina L. Arrowood, Aman A. Desai, Steven D. Jons, Mou Paul, XiaoHua Qiu, Steven Rosenberg, Ian A. Tomlinson
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Patent number: 9808769Abstract: A method for making a composite polyamide membrane including a porous support and a thin film polyamide layer, wherein the method includes: (i) applying a polar solution comprising a polyfunctional amine monomer and a non-polar solution comprising a polyfunctional acyl halide monomer to a surface of a porous support and interfacially polymerizing the monomers to form a thin film polyamide layer; (ii) treating the thin film polyamide layer with a polyfunctional arene compound; and (iii) exposing the thin film polyamide layer to nitrous acid; wherein the polar and non-polar solutions further comprises at least one of the following: (A) at least one of the solutions further comprises a tri-hydrocarbyl phosphate compound represented by Formula (I): and (B) the non-polar solution further comprises an acid-containing monomer comprising a C2-C20 hydrocarbon moiety substituted with at least one carboxylic acid functional group or salt thereof and at least one amine-reactive functional group.Type: GrantFiled: October 29, 2014Date of Patent: November 7, 2017Assignee: Dow Global Technologies LLCInventors: Mou Paul, Abhishek Roy, Ian A. Tomlinson
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Patent number: 9776141Abstract: A method for making a composite polyamide membrane comprising a porous support and a polyamide layer, including the steps of: i) applying a polar solution comprising of polyfunctional amine monomer and a non-polar solution comprising a polyfunctional acyl halide monomer to a surface of a porous support and interfacially polymerizing the monomers to form a polyamide layer; and ii) exposing the thin film polyamide layer to nitrous acid; wherein the method is characterized by at least one of: conducting the interfacial polymerization of step i) in the presence of a subject amine-reactive compound, or applying a subject amine-reactive compound to the interfacially polymerized polyamide layer prior to step ii), wherein the subject amine-reactive compound is different from the polyfunctional acyl halide and polyfunctional amine monomers and is represented by the following formula:Type: GrantFiled: April 7, 2015Date of Patent: October 3, 2017Assignee: Dow Global Technologies LLCInventors: Mou Paul, Abhishek Roy, Ian A. Tomlinson, Matthew J. Jansma
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Publication number: 20170203259Abstract: A method for making a composite polyamide membrane comprising a porous support and a polyamide layer, including the steps of: i) applying a polar solution comprising a polyfunctional amine monomer and a non-polar solution comprising a polyfunctional acyl halide monomer to a surface of a porous support and interfacially polymerizing the monomers to form a polyamide layer; and ii) exposing the thin film polyamide layer to nitrous acid; wherein the method is characterized by at least one of: conducting the interfacial polymerization of step i) in the presence of a subject amine compound, or applying a subject amine compound to the interfacially polymerized polyamide layer prior to step ii), wherein the subject amine compound is different from the polyfunctional acyl halide and polyfunctional amine monomers.Type: ApplicationFiled: May 5, 2015Publication date: July 20, 2017Inventors: Mou PAUL, Matthew J. JANSMA, Abhishek ROY, Ian A. TOMLINSON
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Publication number: 20170182467Abstract: A method for making a composite polyamide membrane comprising a porous support and a polyamide layer, including the steps of: i) applying a polar solution comprising of polyiunctional amine monomer and a non-polar solution comprising a polyiunctional acyl halide monomer to a surface of a porous support and interfacially polymerizing the monomers to form a polyamide layer; and ii) exposing the thin film polyamide layer to nitrous acid; wherein the method is characterized by at least one of: conducting the interfacial polymerization of step i) in the presence of a subject amine-reactive compound, or applying a subject amine-reactive compound to the interfacially polymerized polyamide layer prior to step ii), wherein the subject amine-reactive compound is different from the polyiunctional acyl halide and polyiunctional amine monomers and is represented by the following formula:Type: ApplicationFiled: April 7, 2015Publication date: June 29, 2017Applicant: Dow Global Technologies LLCInventors: Mou Paul, Abhishek Roy, Ian A. Tomlinson, Matthew J. Jansma
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Patent number: 9662615Abstract: A method for making a composite polyamide membrane comprising a porous support and a thin film polyamide layer, wherein the method includes the step of applying a polyfunctional amine monomer and polyfunctional acyl halide monomer to a surface of the porous support and interfacially polymerizing the monomers to form a thin film polyamide layer, wherein the step of applying the polyfunctional acyl halide monomer to the porous support includes the step of combining the polyfunctional acyl halide monomer with a non-polar solvent at a concentration of at least 0.18 weight percent to form a coating solution which is applied to the surface of the porous support, and wherein the interfacial polymerization is conducted in the presence of a tri-hydrocarbyl phosphate compound which is provided in a molar ratio of at least 0.5:1 with the polyfunctional acyl halide monomer. Many additional embodiments are described including membranes made from the subject method and applications for such membranes.Type: GrantFiled: July 3, 2013Date of Patent: May 30, 2017Assignee: Dow Global Technologies LLCInventors: Abhishek Roy, Tina L. Arrowood, Robert C. Cieslinski, Derek M. Stevens, David D. Hawn, Steven D. Jons, Mou Paul, Martin H. Peery, Steven Rosenberg, Ian A. Tomlinson
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Patent number: 9643128Abstract: A method for making a composite polyamide membrane including a porous support and a thin film polyamide layer, wherein the method includes the step of applying a polyfunctional amine monomer and a tetraacyl acyl halide monomer represented by Formula (I) to a surface of the porous support and interfacially polymerizing the monomers to form a thin film polyamide layer; wherein A is selected from: oxygen (—O—); carbon (—C—); silicon (—Si—); each of which may be unsubstituted or substituted, e.g. with alkyl groups of 1-4 carbon atoms; or a carbonyl group (—C(O)—), X is the same or different and is selected from a halogen, and Y is selected from halogen and hydroxide.Type: GrantFiled: July 3, 2013Date of Patent: May 9, 2017Assignee: Dow Global Technologies LLCInventors: Tina L. Arrowood, Aman A. Desai, Steven D. Jons, Mou Paul, Abhishek Roy
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Patent number: 9630149Abstract: A thin film composite polyamide membrane having a porous support and a thin film polyamide layer comprising a reaction product of m-phenylene diamine (mPD) and trimesoyl chloride (TMC), characterized by the thin film polyamide layer having a critical strain value of less than 10%. In another embodiment, the thin film polyamide layer has a modulus of greater than 0.75 (GPa). In yet another embodiment, the thin film polyamide layer has an equilibrium swelling value of at least 45%. In another embodiment, the thin film polyamide layer has a thickness of at least 230 nm.Type: GrantFiled: July 3, 2013Date of Patent: April 25, 2017Assignee: Dow Global Technologies LLCInventors: Abhishek Roy, Tina L. Arrowood, Anand S. Badami, Robert C. Cieslinski, David D. Hawn, Steven D. Jons, Mou Paul, Steven Rosenberg, Huang Wu
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Patent number: 9616392Abstract: A thin film composite polyamide membrane comprising a porous support and a thin film polyamide layer characterized by possessing: i) an azo (—N?N—) content of from 0.30% to 0.80%, as measured by pyrolysis gas chromatography; and ii) a dissociated carboxylate content of at least 0.18 mol/kg as measured by RBS at pH 9.5.Type: GrantFiled: December 15, 2014Date of Patent: April 11, 2017Assignee: Dow Global Technologies LLCInventors: Ian A. Tomlinson, Robert C. Cieslinski, Bruce B. Gerhart, David D. Hawn, Mou Paul, XiaoHua Qiu, Mark A. Rickard, Steven Rosenberg, Abhishek Roy, Chengli Zu
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Patent number: 9610542Abstract: A thin film composite membrane including a porous support and a thin film polyamide layer characterized by having a dissociated carboxylate content of at least 0.45 moles/kg at pH 9.5 and a method for making a composite polyamide applying a polar solution comprising a polyfunctional amine monomer and a non-polar solution comprising a polyfunctional amine-reactive monomer to a surface of the porous support and interfacially polymerizing the monomers to form a thin film polyamide layer, wherein the method is characterized by the non-polar solution comprising at least 0.025 wt % of an acid compound including at least one carboxylic acid moiety and at least one amine-reactive moiety selected from acyl halide and anhydride.Type: GrantFiled: July 3, 2013Date of Patent: April 4, 2017Assignee: Dow Global Technologies LLCInventors: Abhishek Roy, Tina L. Arrowood, Robert C. Cieslinski, David D. Hawn, Steven D. Jons, Mou Paul, Martin H. Peery, XiaoHua Qiu, Steven Rosenberg, Ian A. Tomlinson, Chengli Zu
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Publication number: 20170065938Abstract: A method for making a composite polyamide membrane including a porous support and a thin film polyamide layer, wherein the method includes: applying a polar solution comprising a polyfunctional amine monomer and a non-polar solution comprising a polyfunctional acyl halide monomer to a surface of a porous support and interfacially polymerizing the monomers to form a thin film polyamide layer; and exposing the thin film polyamide layer to nitrous acid; and wherein the method is characterized by treating the thin film polyamide layer with a halogenated benzene compound represented by formula (a) wherein: X is selected from a halogen; Y is selected from hydrogen, carboxylic acid, sulfonic acid; and A, A?, A? and A?? are independently selected from: halogen, hydrogen, hydroxyl, alkoxy, ester, amino, keto-amide, and an alkyl group with the proviso that at least one of A, A?, A? and A?? is selected from: hydroxyl, amino, keto-amide, and wherein the substituent in the ortho or para to at least one of A, A?, A? and A?Type: ApplicationFiled: May 5, 2015Publication date: March 9, 2017Inventors: Mou Paul, Abhishek Roy, Derek M. Stevens, Ian A. Tomlinson
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Publication number: 20170050152Abstract: A method for making a composite polyamide including the steps of: i) applying a polar solution comprising a polyfunctional amine monomer and a non-polar solution comprising a polyfunctional acyl halide monomer to a surface of a porous support and interfacially polymerizing the monomers to form a thin film polyamide layer; ii) treating the thin film polyamide layer with a polyfunctional arene compound; and iii) exposing the thin film polyamide layer to nitrous acid; wherein the non-polar solutions further comprises at least one of the following: (A) at least 50 vol % of a C5 to C20 aliphatic hydrocarbon and from 2 to 25 vol % of benzene or benzene substituted with one or more C1 to C6 alkyl groups; and (B) an acid-containing monomer comprising a C2-C20 hydrocarbon moiety substituted with at least one carboxylic acid functional group or salt thereof and at least one amine-reactive functional group.Type: ApplicationFiled: May 5, 2015Publication date: February 23, 2017Inventors: Mou Paul, Ian A. Tomlinson, Abhishek Roy
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Patent number: 9555378Abstract: A thin film composite polyamide membrane comprising a porous support and a thin film polyamide layer characterized by possessing an azo (—N?N—) content of from 0.75% to 0.95%, as measured by pyrolysis gas chromatography.Type: GrantFiled: December 15, 2014Date of Patent: January 31, 2017Assignee: Dow Global Technologies LLCInventors: Abhishek Roy, Robert C. Cieslinski, Bruce B. Gerhart, David D. Hawn, Mou Paul, XiaoHua Qiu, Mark A. Rickard, Steven Rosenberg, Ian A. Tomlinson, Chengli Zu
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Publication number: 20160317980Abstract: A thin film composite polyamide membrane comprising a porous support and a thin film polyamide layer characterized by possessing: i) an azo (—N?N—) content of from 0.30% to 0.80%, as measured by pyrolysis gas chromatography; and ii) a dissociated carboxylate content of at least 0.18 mol/kg as measured by RBS at pH 9.5.Type: ApplicationFiled: December 15, 2014Publication date: November 3, 2016Inventors: Ian A. Tomlinson, Robert C. Cieslinski, Bruce B. Gerhart, David D. Hawn, Mou Paul, XiaoHua Qiu, Mark A. Rickard, Steven Rosenberg, Abhishek Roy, Chengli Zu
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Publication number: 20160317977Abstract: A method for making a composite polyamide membrane including the step of applying a polar solution including a polyfunctional amine monomer and a non-polar solution comprising a polyfunctional acyl halide monomer to a surface of a porous support and interfacially polymerizing the monomers to form a thin film polyamide layer, wherein the method is characterized by including a tri-hydrocarbyl phosphate within the polar coating solution. The thin film polyamide layer is characterized by possessing an equilibrium water swelling factor of greater than 35% as measured by PFT-AFM.Type: ApplicationFiled: December 15, 2014Publication date: November 3, 2016Inventors: Abhishek Roy, Nicholas S. Beck, Robert C. Cieslinski, Bruce B. Gerhart, David D. Hawn, Duane Jacobson, Mou Paul, Carl W. Reinhardt, Katmerka Tabakovic, Ian A. Tomlinson
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Publication number: 20160310909Abstract: A thin film composite polyamide membrane comprising a porous support and a thin film polyamide layer characterized by possessing: i) an azo (—N?N—) content of from 0.40% to 1.00%, as measured by pyrolysis gas chromatography; and ii) a dissociated carboxylate content of at least 0.40 mol/kg as measured by RBS at pH 9.5.Type: ApplicationFiled: December 15, 2014Publication date: October 27, 2016Inventors: Mou PAUL, Robert C. CIESLINSKI, Bruce B. GERHART, David D. HAWN, XiaoHua QIU, Mark A. RICKARD, Steven ROSENBERG, Abhishek ROY, Ian A. TOMLINSON, Chengli ZU