Patents by Inventor René Lodewijk Maria Demmer
René Lodewijk Maria Demmer 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: 9163172Abstract: The present invention relates to a deicing composition comprising (i) a deicing agent selected from the group consisting of sodium chloride, calcium magnesium acetate, calcium chloride, magnesium chloride, potassium chloride, potassium acetate, sodium acetate, sodium formate, potassium formate, (ii) a native protein, and (iii) a molasses. It furthermore relates to a process for preparing said deicing composition and to a process for deicing a surface using said deicing composition.Type: GrantFiled: June 5, 2012Date of Patent: October 20, 2015Assignee: AKZO NOBEL CHEMICALS INTERNATIONAL B.V.Inventors: Edwin Ronald De Jong, Wasil Maslow, René Lodewijk Maria Demmer
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Patent number: 9150767Abstract: The present invention relates to a deicing composition comprising (i) a deicing agent selected from the group consisting of sodium chloride, calcium magnesium acetate, calcium chloride, magnesium chloride, potassium chloride, potassium acetate, sodium acetate, sodium formate, potassium formate, (ii) a native protein, and (iii) a thickener. It furthermore relates to a process for preparing said deicing composition and to a process for deicing a surface using said deicing composition.Type: GrantFiled: June 5, 2012Date of Patent: October 6, 2015Assignee: AKZO NOBEL CHEMICALS INTERNATIONAL B.V.Inventors: René Lodewijk Maria Demmer, Wasil Maslow, Edwin Ronald De Jong
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Patent number: 9133378Abstract: The present invention relates to a deicing composition comprising (i) a deicing agent selected from the group consisting of sodium chloride, calcium magnesium acetate, calcium chloride, magnesium chloride, potassium chloride, potassium acetate, sodium acetate, sodium formate, potassium formate, (ii) a lignin derivative, and (iii) molasses. It furthermore relates to a process for preparing said deicing composition and to a process for deicing a surface using said deicing composition.Type: GrantFiled: November 2, 2012Date of Patent: September 15, 2015Assignee: AKZO NOBEL CHEMICALS INTERNATIONAL B.V.Inventors: Wasil Maslow, Edwin Ronald De Jong, René Lodewijk Maria Demmer
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Publication number: 20140284518Abstract: The present invention relates to a deicing composition comprising (i) a deicing agent selected from the group consisting of sodium chloride, calcium magnesium acetate, calcium chloride, magnesium chloride, potassium chloride, potassium acetate, sodium acetate, sodium formate, potassium formate, (ii) a lignin derivative, and (iii) molasses. It furthermore relates to a process for preparing said deicing composition and to a process for deicing a surface using said deicing composition.Type: ApplicationFiled: November 2, 2012Publication date: September 25, 2014Applicant: AKZO NOBEL CHEMICALS INTERNATIONAL B.V.Inventors: Wasil Maslow, Edwin Ronald De Jong, René Lodewijk Maria Demmer
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Publication number: 20140110624Abstract: The present invention relates to a deicing composition comprising (i) a deicing agent selected from the group consisting of sodium chloride, calcium magnesium acetate, calcium chloride, magnesium chloride, potassium chloride, potassium acetate, sodium acetate, sodium formate, potassium formate, (ii) a native protein, and (iii) a thickener. It furthermore relates to a process for preparing said deicing composition and to a process for deicing a surface using said deicing composition.Type: ApplicationFiled: June 5, 2012Publication date: April 24, 2014Applicant: AKZO NOBEL CHEMICALS INTERNATIONAL B.V.Inventors: René Lodewijk Maria Demmer, Wasil Maslow, Edwin Ronald De Jong
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Publication number: 20140091252Abstract: The present invention relates to a deicing composition comprising (i) a deicing agent selected from the group consisting of sodium chloride, calcium magnesium acetate, calcium chloride, magnesium chloride, potassium chloride, potassium acetate, sodium acetate, sodium formate, potassium formate, (ii) a native protein, and (iii) a molasses. It furthermore relates to a process for preparing said deicing composition and to a process for deicing a surface using said deicing composition.Type: ApplicationFiled: June 5, 2012Publication date: April 3, 2014Applicant: AKZO NOBEL CHEMICALS INTERNATIONL B.V.Inventors: Edwin Ronald De Jong, Wasil Maslow, René Lodewijk Maria Demmer
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Patent number: 8038884Abstract: The present invention relates to process to prepare a chlorine-containing compound using an aqueous salt solution containing at least 100 g/l of sodium chloride and a contaminating amount of polyvalent cations comprising the steps of (i) preparing an aqueous salt solution containing at least 100 g/l of sodium chloride and at least 0.01 ppm of polyvalent cations by dissolving a sodium chloride source in water, (ii) adding an effective amount of at least one positive retention enhancing component to the aqueous solution, (iii) subsequently subjecting the solution to a nanofiltration step, thereby separating the solution into a retentate which is enriched for polyvalent cations and a permeate which is the purified aqueous salt solution, (iv) reacting the chloride anions in the permeate to a chlorine-containing compound by an electrolysis step, and (v) recycling at least part of the retentate to dissolution step (i).Type: GrantFiled: February 13, 2006Date of Patent: October 18, 2011Assignee: Akzo Nobel N.V.Inventors: Gerrald Bargeman, René Lodewijk Maria Demmer, Antoon Ten Kate, Boris Kuzmanovic, Cornelis Elizabeth Johannus Van Lare, Mateo Jozef Jacques Mayer, Maarten André Irène Schutyser, Jan Barend Westerink
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Patent number: 8038883Abstract: The present invention relates to a process to prepare salt comprising the following steps: (i) preparing an aqueous salt solution containing at least 100 g/l of sodium chloride and at least 0.01 ppm of polyvalent cations by dissolving a sodium chloride source in industrial water, (ii) adding an effective amount of at least one positive retention enhancing component to the aqueous salt solution, (iii) subsequently subjecting the solution to a nanofiltration step, thereby separating the solution into a retentate which is enriched for the polyvalent cations and a permeate which is the purified aqueous salt solution, and (iv) concentrating the permeate to produce salt.Type: GrantFiled: February 13, 2006Date of Patent: October 18, 2011Assignee: Akzo Nobel N.V.Inventors: Gerrald Bargeman, René Lodewijk Maria Demmer, Antoon Ten Kate, Boris Kuzmanovic, Cornelis Elizabeth Johannus Van Lare, Mateo Jozef Jacques Mayer, Maarten André Irène Schutyser, Jan Barend Westerink
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Patent number: 7858058Abstract: The invention pertains to removing soluble alkali metal or ammonium salt of a divalent anion from brine comprising following steps: obtaining brine with NaCl-concentration between 150g/L and saturation in the presence or absense of a cyrstal growth inhibitor for NaCl(GCI-NaCl),or with NaCl concentration above saturation in the presence of a CGI-NaCl, said brine optionally comprising a crystal growth inhibitor for the alkali metal or ammonium salt of the divalent anion(CGI-DA); if necessary, acidify the solution to pH<11.5; if the concentration of CGI-DA is less than 20 mg/L, adding CGI-DA to obtain at least 20 mg CGI-DA/L; subjecting the solution to a membrane filtration; if the concentration of CGI-DA in the concentration from the separation is less than 20 mg/L, adding CGI-DA to obtain at least 20 mg CGI-DA/L; crystalling the concentration; removing the crystallized alkali metal or ammonium salt of the divalent anion.Type: GrantFiled: October 18, 2005Date of Patent: December 28, 2010Assignee: Akzo Nobel N.V.Inventors: Gerrald Bargeman, René Lodewijk Maria Demmer, Boris Kuzmanovic, Cornelis Elizabeth Johannus Van Lare, Mateo Jozef Jacques Mayer, Maarten André Irène Schutyser, Jan Barend Westerink
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Publication number: 20080185340Abstract: The present invention relates to a process to prepare salt comprising the following steps: (i) preparing an aqueous salt solution containing at least 100 g/l of sodium chloride and at least 0.01 ppm of polyvalent cations by dissolving a sodium chloride source in industrial water, (ii) adding an effective amount of at least one positive retention enhancing component to the aqueous salt solution, (iii) subsequently subjecting the solution to a nanofiltration step, thereby separating the solution into a retentate which is enriched for the polyvalent cations and a permeate which is the purified aqueous salt solution, and (iv) concentrating the permeate to produce salt.Type: ApplicationFiled: February 13, 2006Publication date: August 7, 2008Applicant: Akzo Nobel N.V.Inventors: Gerrald Bargeman, Rene Lodewijk Maria Demmer, Antoon Ten Kate, Boris Kuzmanovic, Cornelis Elizabeth Johannus Van Lare, Mateo Jozef Jacques Mayer, Maarten Andre Irene Schutyser, Jan Barend Westerink
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Publication number: 20080169202Abstract: The present invention relates to process to prepare a chlorine-containing compound using an aqueous salt solution containing at least 100 g/l of sodium chloride and a contaminating amount of polyvalent cations comprising the steps of (i) preparing an aqueous salt solution containing at least 100 g/l of sodium chloride and at least 0.01 ppm of polyvalent cations by dissolving a sodium chloride source in water, (ii) adding an effective amount of at least one positive retention enhancing component to the aqueous solution, (iii) subsequently subjecting the solution to a nanofiltration step, thereby separating the solution into a retentate which is enriched for polyvalent cations and a permeate which is the purified aqueous salt solution, (iv) reacting the chloride anions in the permeate to a chlorine- containing compound by an electrolysis step, and (v) recycling at least part of the retentate to dissolution step (i).Type: ApplicationFiled: February 13, 2006Publication date: July 17, 2008Applicant: Akzo Nobel N.V.Inventors: Gerrald Bargeman, Rene Lodewijk Maria Demmer, Antoon Ten Kate, Boris Kuzmanovic, Cornelis Elizabeth Johannus Van Lare, Mateo Jozef Jacques Mayer, Maarten Andre Irene Schutyser, Jan Barend Westerink
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Patent number: 7186394Abstract: The invention relates to a process to produce brine of improved purity wherein a salt source, contaminated with sulphate ions and alkaline (earth) metal ions, is dissolved in water in the presence of an effective amount of a retarding agent comprising at least one low and at least one high molecular weight retarding agent. Said retarding agent effectively reduces the level of the alkaline (earth) metal sulphate dissolved in the brine, particularly the amount of calcium and sulphate. Preferably, the combination of the low and high molecular weight retarding agents is synergetic in the reduction of dissolved alkaline-earth metal sulphate.Type: GrantFiled: June 12, 2002Date of Patent: March 6, 2007Assignee: Akzo Nobel N.V.Inventors: Mateo Jozef Jacques Mayer, René Lodewijk Maria Demmer
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Patent number: 6866688Abstract: The invention relates to an evaporative crystallization process to make salt compositions that includes a step wherein a mother liquor is formed that contains an effective amount of a crystal growth inhibitor that is selected from oligopeptides, polypeptides, and polymers bearing two or more carboxylic acid groups or carboxyalkyl groups and optionally further phosphate, phosphonate, phosphino, sulfate, and/or sulfonate groups, such as carboxymethyl cellulose with phosphate groups, to form salt crystals with a (111) face. The salt can be washed with a reduced amount of washing water while still containing lower amounts of K, Br, SO4, and/or Ca. A wet salt can be obtained by partially drying the salt crystals that are formed.Type: GrantFiled: June 19, 2002Date of Patent: March 15, 2005Assignee: Akzo Nobel N.V.Inventors: Mateo Jozef Jacques Mayer, René Lodewijk Maria Demmer
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Patent number: 6846417Abstract: The invention relates to a process to produce brine of improved purity by dissolving salt that contains a calcium sulfate source in water, in the presence of a retarding agent, while using one or more co-retardants to bind contaminants that could interfere with the retarding agents.Type: GrantFiled: August 9, 2002Date of Patent: January 25, 2005Assignee: Akzo Nobel N.V.Inventors: Mateo Jozef Jacques Mayer, René Lodewijk Maria Demmer
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Publication number: 20030049197Abstract: The invention relates to a process to produce brine of improved purity by dissolving salt that contains a calcium sulfate source in water, in the presence of a retarding agent, while using one or more co-retardants to bind contaminants that could interfere with the retarding agents.Type: ApplicationFiled: August 9, 2002Publication date: March 13, 2003Inventors: Mateo Jozef Jacques Mayer, Rene Lodewijk Maria Demmer
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Publication number: 20030009857Abstract: The invention relates to an evaporative crystallization process to make salt compositions that includes a step wherein a mother liquor is formed that contains an effective amount of a crystal growth inhibitor that is selected from oligopeptides, polypeptides, and polymers bearing two or more carboxylic acid groups or carboxyalkyl groups and optionally further phosphate, phosphonate, phosphino, sulfate, and/or sulfonate groups, such as carboxymethyl cellulose with phosphate groups, to form salt crystals with a (111 ) face. The salt can be washed with a reduced amount of washing water while still containing lower amounts of K, Br, SO4, and/or Ca. A wet salt can be obtained by partially drying the salt crystals that are formed.Type: ApplicationFiled: June 19, 2002Publication date: January 16, 2003Inventors: Mateo Jozef Jacques Mayer, Rene Lodewijk Maria Demmer