Patents by Inventor Glenn Mankin
Glenn Mankin 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: 8148434Abstract: A process for producing an aqueous silica-based sol is disclosed wherein a cationic ion exchange resin having part of its ion exchange capacity in hydrogen form is contacted with an aqueous alkali metal silicate to form a slurry having a pH from 5.0 to 11.5 and/or having particle aggregation or microgel formation corresponding to a S value up to 45%; adjusting the pH using a material comprising an aluminum compound; and separating the resin from the slurry. Silica-based sols having an S value from 15 to 25%, mole ratio Si:Al from 20:1 to 50:1, mole ratio Si:X, where X=alkali metal, from 5:1 to 17:1, SiO2 content of at least 5% by weight and containing silica-based particles having a specific surface area of at least 300 m2/g, as well as the use of such silica-based sols in producing paper are disclosed.Type: GrantFiled: November 15, 2010Date of Patent: April 3, 2012Assignee: Akzo Nobel N.V.Inventors: Johan Nyander, Glenn Mankin
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Publication number: 20110065812Abstract: A process for producing an aqueous silica-based sol is disclosed wherein a cationic ion exchange resin having part of its ion exchange capacity in hydrogen form is contacted with an aqueous alkali metal silicate to form a slurry having a pH from 5.0 to 11.5 and/or having particle aggregation or microgel formation corresponding to a S value up to 45%; adjusting the pH using a material comprising an aluminum compound; and separating the resin from the slurry. Silica-based sols having an S value from 15 to 25%, mole ratio Si:Al from 20:1 to 50:1, mole ratio Si:X, where X=alkali metal, from 5:1 to 17:1, SiO2 content of at least 5% by weight and containing silica-based particles having a specific surface area of at least 300 m2/g, as well as the use of such silica-based sols in producing paper are disclosed.Type: ApplicationFiled: November 15, 2010Publication date: March 17, 2011Applicant: AKZO NOBEL N.V.Inventors: Johan NYANDER, Glenn MANKIN
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Patent number: 7893114Abstract: The invention relates to a process for producing aqueous silica-based sols which comprises providing a cationic ion exchange resin having at least part of its ion exchange capacity in hydrogen form; bringing said ion exchange resin in contact with an aqueous alkali metal silicate to form an aqueous slurry; adjusting the pH of the aqueous slurry and separating the ion exchange resin from the aqueous slurry, as well as the silica-based sols obtained by the process; the invention also relates to silica-based sols obtained by the process, as well as a process for producing paper which comprises providing an aqueous suspension comprising cellulosic fibres; adding to the suspension one or more drainage and retention aids comprising a silica-based sol according to the invention; and dewatering the obtained suspension to provide a sheet or web of paper.Type: GrantFiled: June 2, 2010Date of Patent: February 22, 2011Assignee: Akzo Nobel N.V.Inventors: Glenn Mankin, Marek Tokarz, Freddie Hansson
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Patent number: 7851513Abstract: A process for producing aqueous silica-based sols, having an S value from 15 to 25%, mole ratio Si:Al from 20:1 to 50:1, mole ratio Si:X, where X=alkali metal, from 5:1 to 17:1, SiO2 content of at least 5% by weight and containing silica-based particles having a specific surface area of at least 300 m2/g, are disclosed wherein a cationic ion exchange resin having part of its ion exchange capacity in hydrogen form is contacted with an aqueous alkali metal silicate to form a slurry having a pH from 5.0 to 11.5 and/or having particle aggregation or microgel formation corresponding to a S value up to 45%; adjusting the pH using a material comprising an aluminium compound; and separating the resin from the slurry. Further, the use of such silica-based sols in producing paper is disclosed.Type: GrantFiled: November 20, 2009Date of Patent: December 14, 2010Assignee: Akzo Nobel N.V.Inventors: Johan Nyander, Glenn Mankin
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Publication number: 20100236738Abstract: The invention relates to a process for producing aqueous silica-based sols which comprises providing a cationic ion exchange resin having at least part of its ion exchange capacity in hydrogen form; bringing said ion exchange resin in contact with an aqueous alkali metal silicate to form an aqueous slurry; adjusting the pH of the aqueous slurry and separating the ion exchange resin from the aqueous slurry, as well as the silica-based sols obtained by the process. The invention also relates to silica-based sols obtained by the process, as well as a process for producing paper which comprises providing an aqueous suspension comprising cellulosic fibres; adding to the suspension one or more drainage and retention aids comprising a silica-based sol according to the invention; and dewatering the obtained suspension to provide a sheet or web of paper.Type: ApplicationFiled: June 2, 2010Publication date: September 23, 2010Applicant: AKZO NOBEL N.VInventors: Glenn Mankin, Marek Tokarz, Freddie Hansson
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Patent number: 7732495Abstract: The invention relates to a process for producing aqueous silica-based sols which comprises providing a cationic ion exchange resin having at least part of its ion exchange capacity in hydrogen form; bringing said ion exchange resin in contact with an aqueous alkali metal silicate to form an aqueous slurry; adjusting the pH of the aqueous slurry and separating the ion exchange resin from the aqueous slurry, as well as the silica-based sols obtained by the process. The invention also relates to silica-based sols obtained by the process, as well as a process for producing paper which comprises providing an aqueous suspension comprising cellulosic fibres; adding to the suspension one or more drainage and retention aids comprising a silica-based sol according to the invention; and dewatering the obtained suspension to provide a sheet or web of paper.Type: GrantFiled: April 7, 2005Date of Patent: June 8, 2010Assignee: Akzo Nobel N.V.Inventors: Glenn Mankin, Marek Tokarz, Freddie Hansson
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Publication number: 20100065238Abstract: A process for producing an aqueous silica-based sol is disclosed wherein a cationic ion exchange resin having part of its ion exchange capacity in hydrogen form is contacted with an aqueous alkali metal silicate to form a slurry having a pH from 5.0 to 11.5 and/or having particle aggregation or microgel formation corresponding to a S value up to 45%; adjusting the pH using a material comprising an aluminium compound; and separating the resin from the slurry. Silica-based sols having an S value from 15 to 25%, mole ratio Si:Al from 20:1 to 50:1, mole ratio Si:X, where X=alkali metal, from 5:1 to 17:1, SiO2 content of at least 5% by weight and containing silica-based particles having a specific surface area of at least 300 m2/g, as well as the use of such silica-based sols in producing paper are disclosed.Type: ApplicationFiled: November 20, 2009Publication date: March 18, 2010Applicant: AKZO NOBEL N. V.Inventors: Johan NYANDER, Glenn Mankin
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Patent number: 7629392Abstract: A process for producing an aqueous silica-based soils disclosed wherein a cationic ion exchange resin having part of its ion exchange capacity in hydrogen form is contacted with an aqueous alkali metal silicate to form a slurry having a pH from 5.0 to 11.5 and/or having particle aggregation or microgel formation corresponding to a S value up to 45%; adjusting the pH using a material comprising an aluminum compound; and separating the resin from the slurry. Silica-based sols having an S value from 15 to 25%, mole ratio Si:Al from 20:1 to 50:1, mole ratio Si:X, where X=alkali metal, from 5:1 to 17:1, SiO2 content of at least 5% by weight and containing silica-based particles having a specific surface area of at least 300 m2/g, as well as the use of such silica-based sols in producing paper are also disclosed.Type: GrantFiled: April 7, 2005Date of Patent: December 8, 2009Assignee: Akzo Nobel N.V.Inventors: Johan Nyander, Glenn Mankin
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Publication number: 20050228058Abstract: The invention relates to a process for producing aqueous silica-based sols which comprises providing a cationic ion exchange resin having at least part of its ion exchange capacity in hydrogen form; bringing said ion exchange resin in contact with an aqueous alkali metal silicate to form an aqueous slurry; adjusting the pH of the aqueous slurry and separating the ion exchange resin from the aqueous slurry, as well as the silica-based sols obtained by the process. The invention also relates to silica-based sols obtained by the process, as well as a process for producing paper which comprises providing an aqueous suspension comprising cellulosic fibres; adding to the suspension one or more drainage and retention aids comprising a silica-based sol according to the invention; and dewatering the obtained suspension to provide a sheet or web of paper.Type: ApplicationFiled: April 7, 2005Publication date: October 13, 2005Inventors: Glenn Mankin, Marek Tokarz, Freddie Hansson
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Publication number: 20050228057Abstract: A process for producing an aqueous silica-based sol is disclosed wherein a cationic ion exchange resin having part of its ion exchange capacity in hydrogen form is contacted with an aqueous alkali metal silicate to form a slurry having a pH from 5.0 to 11.5 and/or having particle aggregation or microgel formation corresponding to a S value up to 45%; adjusting the pH using a material comprising an aluminium compound; and separating the resin from the slurry. Silica-based sols having an S value from 15 to 25%, mole ratio Si:Al from 20:1 to 50:1, mole ratio Si:X, where X=alkali metal, from 5:1 to 17:1, SiO2 content of at least 5% by weight and containing silica-based particles having a specific surface area of at least 300 m2/g, as well as the use of such silica-based sols in producing paper are also disclosed.Type: ApplicationFiled: April 7, 2005Publication date: October 13, 2005Inventors: Johan Nyander, Glenn Mankin