Patents by Inventor Hazel SPRAFKE
Hazel SPRAFKE 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: 11634515Abstract: Process for producing aqueous polyacrylamide solutions by polymerizing an aqueous solution comprising at least acrylamide thereby obtaining an aqueous polyacrylamide gel and dissolving said aqueous polyacrylamide gel in water, wherein the manufacturing steps are allocated to two different locations A and B and the process comprises the step of transporting an aqueous polyacrylamide gel hold in a transportable polymerization unit from a location A to a location B. The transportable polymerization unit comprises a cylindrical upper part, a conical part at its lower end, feeds for the aqueous monomer solution, a closable bottom opening, and means allowing to deploy the polymerization unit in a vertical manner.Type: GrantFiled: October 18, 2018Date of Patent: April 25, 2023Assignee: BASF SEInventors: Hazel Sprafke, Tobias Joachim Zimmermann, Dirk Meckelnburg, Dennis Loesch, Markus Ostermayr, Faissal-Ali El-Toufaili
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Patent number: 11634516Abstract: Process for producing aqueous polyacrylamide solutions by polymerizing an aqueous solution comprising at least acrylamide thereby obtaining an aqueous polyacrylamide gel and dissolving said aqueous polyacrylamide gel in water, wherein the manufacturing steps are allocated to two different locations A and B and the process comprises the step of transporting an aqueous polyacrylamide gel hold in a transportable polymerization unit from a location A to a location B. Modular, relocatable plant for manufacturing aqueous polyacrylamide solutions wherein the units of the plant are located at two different locations A and B.Type: GrantFiled: October 18, 2018Date of Patent: April 25, 2023Assignee: BASF SEInventors: Dennis Loesch, Tobias Joachim Zimmermann, Hazel Sprafke, Dirk Meckelnburg, Markus Ostermayr, Faissal-Ali El-Toufaili
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Patent number: 11629205Abstract: Process for producing aqueous polyacrylamide solutions by polymerizing an aqueous solution comprising at least acrylamide thereby obtaining an aqueous polyacrylamide gel and dissolving said aqueous polyacrylamide gel in water, wherein the process is carried out in a modular, relocatable plant. The plant preferably is deployed at a location at which aqueous polyacrylamide solutions are used, for example on an oilfield or in a mining area.Type: GrantFiled: October 18, 2018Date of Patent: April 18, 2023Assignee: BASF SEInventors: Hazel Sprafke, Markus Ostermayr, Tobias Joachim Zimmermann, Dirk Meckelnburg, Dennis Loesch, Faissal-Ali El-Toufaili
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Patent number: 11384177Abstract: Process for producing aqueous polyacrylamide solutions by polymerizing an aqueous solution comprising at least acrylamide obtained by hydrolyzing acrylonitrile in water in the presence of a biocatalyst capable of converting acrylonitrile to acrylamide thereby obtaining an aqueous polyacrylamide gel and dissolving said aqueous polyacrylamide gel in water, wherein the manufacturing steps are allocated to two different locations A and B and the process comprises the step of transporting an aqueous polyacrylamide gel hold in a transportable polymerization unit from a location A to a location B. The aqueous polyacrylamide gel furthermore comprises at least one stabilizer for prevention of polymer degradation.Type: GrantFiled: October 18, 2018Date of Patent: July 12, 2022Assignee: BASF SEInventors: Tobias Joachim Zimmermann, Faissal-Ali El-Toufaili, Hazel Sprafke
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Publication number: 20210179758Abstract: Process for producing aqueous polyacrylamide solutions by polymerizing an aqueous solution comprising at least acrylamide thereby obtaining an aqueous polyacrylamide gel and dissolving said aqueous polyacrylamide gel in water, wherein the process is carried out in a modular, relocatable plant. The plant preferably is deployed at a location at which aqueous polyacrylamide solutions are used, for example on an oilfield or in a mining area.Type: ApplicationFiled: October 18, 2018Publication date: June 17, 2021Inventors: Hazel SPRAFKE, Markus OSTERMAYR, Tobias Joachim ZIMMERMANN, Dirk MECKELNBURG, Dennis LOESCH, Faissal-Ali EL-TOUFAILI
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Publication number: 20210070904Abstract: Process for producing aqueous polyacrylamide solutions by polymerizing an aqueous solution comprising at least acrylamide thereby obtaining an aqueous polyacrylamide gel and dissolving said aqueous polyacrylamide gel in water, wherein the manufacturing steps are allocated to two different locations A and B and the process comprises the step of transporting an aqueous polyacrylamide gel hold in a transportable polymerization unit from a location A to a location B. Modular, relocatable plant for manufacturing aqueous polyacrylamide solutions wherein the units of the plant are located at two different locations A and B.Type: ApplicationFiled: October 18, 2018Publication date: March 11, 2021Applicant: BASF SEInventors: Dennis LOESCH, Tobias Joachim ZIMMERMANN, Hazel SPRAFKE, Dirk MECKELNBURG, Markus OSTERMAYR, Faissal-Ali EL-TOUFAILI
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Patent number: 10927222Abstract: A process for producing an aqueous polymer solution, including: (a) providing a hydrated polymer that has been prepared by aqueous solution polymerisation of ethylenically unsaturated monomers, which hydrated polymer contains at least 10% by weight active polymer; (b) cutting the hydrated polymer by subjecting the hydrated polymer to at least one cutting stage containing at least one stream of aqueous liquid at a pressure of at least 150 bar to reduce the size of the hydrated polymer; and (c) dissolving the hydrated polymer in an aqueous liquid so as to obtain an aqueous polymer solution. An apparatus for producing an aqueous polymer solution.Type: GrantFiled: April 20, 2017Date of Patent: February 23, 2021Assignee: BASF SEInventors: Sandra Jeck, Oliver Soetje, Tobias Bringmann, Gabriela Eugenia Fonseca Zepeda, Dirk Meckelnburg, Dennis Loesch, Bjoern Langlotz, John Barratt, Faissal-Ali El-Toufaili, Hazel Sprafke, Bernd Schube, Markus Ostermayr
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Publication number: 20200369811Abstract: Process for producing aqueous polyacrylamide solutions by polymerizing an aqueous solution comprising at least acrylamide obtained by hydrolyzing acrylonitrile in water in the presence of a biocatalyst capable of converting acrylonitrile to acrylamide thereby obtaining an aqueous polyacrylamide gel and dissolving said aqueous polyacrylamide gel in water, wherein the manufacturing steps are allocated to two different locations A and B and the process comprises the step of transporting an aqueous polyacrylamide gel hold in a transportable polymerization unit from a location A to a location B. The aqueous polyacrylamide gel furthermore comprises at least one stabilizer for prevention of polymer degradation.Type: ApplicationFiled: October 18, 2018Publication date: November 26, 2020Inventors: Tobias Joachim ZIMMERMANN, Faissal-Ali EL-TOUFAILI, Hazel SPRAFKE
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Publication number: 20200308314Abstract: Process for producing aqueous polyacrylamide solutions by polymerizing an aqueous solution comprising at least acrylamide thereby obtaining an aqueous polyacrylamide gel and dissolving said aqueous polyacrylamide gel in water, wherein the manufacturing steps are allocated to two different locations A and B and the process comprises the step of transporting an aqueous monomer premix from a location A to a location B. Modular, relocatable plant for manufacturing aqueous polyacrylamide solutions wherein the units of the plant are located at two different locations A and B.Type: ApplicationFiled: October 18, 2018Publication date: October 1, 2020Inventors: Hazel SPRAFKE, Dirk MECKELNBURG, Dennis LOESCH, Markus OSTERMAYR, Tobias Joachim ZIMMERMANN, Faissal-Ali EL-TOUFAILI
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Publication number: 20200283675Abstract: Process for producing aqueous polyacrylamide solutions by polymerizing an aqueous solution comprising at least acrylamide thereby obtaining an aqueous polyacrylamide gel and dissolving said aqueous polyacrylamide gel in water, wherein the manufacturing steps are allocated to two different locations A and B and the process comprises the step of transporting an aqueous polyacrylamide gel hold in a transportable polymerization unit from a location A to a location B. The transportable polymerization unit comprises a cylindrical upper part, a conical part at its lower end, feeds for the aqueous monomer solution, a closable bottom opening, and means allowing to deploy the polymerization unit in a vertical manner.Type: ApplicationFiled: October 18, 2018Publication date: September 10, 2020Inventors: Hazel SPRAFKE, Tobias Joachim ZIMMERMANN, Dirk MECKELNBURG, Dennis LOESCH, Markus OSTERMAYR, Faissal-Ali EL-TOUFAILI
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Publication number: 20190292330Abstract: A process for producing an aqueous polymer solution, including: (a) providing a hydrated polymer that has been prepared by aqueous solution polymerisation of ethylenically unsaturated monomers, which hydrated polymer contains at least 10% by weight active polymer; (b) cutting the hydrated polymer by subjecting the hydrated polymer to at least one cutting stage containing at least one stream of aqueous liquid at a pressure of at least 150 bar to reduce the size of the hydrated polymer; and (c) dissolving the hydrated polymer in an aqueous liquid so as to obtain an aqueous polymer solution. An apparatus for producing an aqueous polymer solution.Type: ApplicationFiled: April 20, 2017Publication date: September 26, 2019Applicant: BASF SEInventors: Sandra JECK, Oliver SOETJE, Tobias BRINGMANN, Gabriela Eugenia FONSECA ZEPEDA, Dirk MECKELNBURG, Dennis LOESCH, Bjoern LANGLOTZ, John BARRATT, Faissal-Ali EL-TOUFAILI, Hazel SPRAFKE, Bernd SCHUBE, Markus OSTERMAYR
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Publication number: 20190153300Abstract: A method for preparing an aqueous polyacrylamide solution, where the method includes: hydrating acrylonitrile in water in presence of a biocatalyst capable of converting acrylonitrile to acrylamide so as to obtain an acrylamide solution; directly polymerizing the acrylamide solution so as to obtain a polyacrylamide gel; and directly dissolving the polyacrylamide gel by addition of water so as to obtain an aqueous polyacrylamide solution, wherein the polyacrylamide gel is dissolved by water jet cutting.Type: ApplicationFiled: April 25, 2017Publication date: May 23, 2019Applicant: BASF SEInventors: Hazel SPRAFKE, Faissal-Ali EL-TOUFAILI, Bjoern LANGLOTZ, John BARRATT, Tobias BRINGMANN, Gabriela Eugenia FONSECA ZEPEDA, Sandra JECK, Dennis LOESCH, Dirk MECKELNBURG, Markus OSTERMAYR, Bernd SCHUBE, Oliver SOETJE
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Publication number: 20190144574Abstract: A method for preparing an aqueous polyacrylamide solution is disclosed. The method comprises:—hydrating acrylonitrile in water in presence of a biocatalyst capable of converting acrylonitrile to acrylamide so as to obtain an acrylamide solution,—directly polymerizing the acrylamide solution so as to obtain a polyacrylamide gel, and—directly dissolving the polyacrylamide gel by addition of water so as to obtain an aqueous polyacrylamide solution.Type: ApplicationFiled: April 25, 2017Publication date: May 16, 2019Applicant: BASF SEInventors: Hazel SPRAFKE, Faissal-Ali EL-TOUFAILI, Bjoern LANGLOTZ, John BARRATT, Tobias BRINGMANN, Gabriela Eugenia FONSECA ZEPEDA, Sandra JECK, Dennis LOESCH, Dirk MECKELNBURG, Markus OSTERMAYR, Bernd SCHUBE, Oliver SOETJE
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Publication number: 20170240660Abstract: Disclosed are methods for controlled radical polymerization of acrylic monomers using an organic photoredox catalyst, where the polymerization is mediated, as well as regulated, by light.Type: ApplicationFiled: October 6, 2015Publication date: August 24, 2017Inventors: John W. KRAMER, Craig J. HAWKER, Brett P. FORS, Nicolas J. TREAT, Hazel SPRAFKE, Paul G. CLARK, Javier READ de ALANIZ