Patents Assigned to Kronos International Inc
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Publication number: 20240092651Abstract: The invention relates to a feedstock composite comprising a metal oxide fraction and a carbonaceous fraction, a binder composition and the use thereof for obtaining the feedstock composite. Further, the invention refers to a method for obtaining the feedstock composite.Type: ApplicationFiled: September 19, 2023Publication date: March 21, 2024Applicant: Kronos International, Inc.Inventors: Frank Landwehr, Thomas Pierau, Beawer Barwari, Mitja Medved, Oliver Gnotke
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Publication number: 20240034638Abstract: The invention relates to a method for recovering chlorine from hydrogen chloride generated in carbochlorination processes. Further, the invention refers to the use of this method for recovering chlorine from hydrogen chloride generated in a carbochlorination process.Type: ApplicationFiled: July 25, 2023Publication date: February 1, 2024Applicant: Kronos International, Inc.Inventors: Thomas Pierau, Mitja Medved
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Publication number: 20230416535Abstract: The present invention relates to a grinding aid as well as a grinding method. Further, the present invention pertains to a titanium dioxide particle with a layer comprising a grinding aid as described herein and the use of said titanium dioxide particle in various applications.Type: ApplicationFiled: September 12, 2023Publication date: December 28, 2023Applicant: Kronos International, Inc.Inventors: Mariusz Molon, Nicole Kolmer-anderl, Janine Siekman, Sebastian Doedt
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Publication number: 20230416107Abstract: The invention relates to a method for treating a residue obtained from the chloride process, wherein the residue comprises the components titanium dioxide, coke, an inert metal oxide, and an iron-containing component. Further, the invention refers to the use of this method to separate the components contained in said residue, and to the use of the separated components in the chloride process for obtaining titanium dioxide.Type: ApplicationFiled: June 23, 2023Publication date: December 28, 2023Applicant: Kronos International, Inc.Inventors: Thomas Pierau, Frank Landwehr, Mitja Medved
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Publication number: 20230374328Abstract: The invention relates to a pigment particle possessing at least one security feature, a method for obtaining the same, and a suspension comprised of the pigment particle. In addition, the invention refers to a method for marking a product with a pigment particle according to the invention and the use of a pigment particle for marking and verifying said pigment particle.Type: ApplicationFiled: May 22, 2023Publication date: November 23, 2023Applicant: Kronos International, Inc.Inventors: Mitja Medved, Frank Mersch, Norberto Bendzko
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Publication number: 20230250295Abstract: The invention relates to a colored pigment particle, a method for obtaining said colored pigment particle, and a composition comprised of said particle. In addition, the invention refers to the use of said colored pigment particle.Type: ApplicationFiled: February 6, 2023Publication date: August 10, 2023Applicant: Kronos International, Inc.Inventors: Norbert Bendzko, Frank Mersch
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Publication number: 20230250302Abstract: The invention relates to a color-neutral rutile pigment particle, a method for obtaining said pigment particle, and a composition comprised of said rutile pigment particle. Finally, the invention refers to the use of the rutile pigment particle in various applications.Type: ApplicationFiled: February 6, 2023Publication date: August 10, 2023Applicant: Kronos International, Inc.Inventors: Norbert Bendzko, Frank Mersch
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Patent number: 11623993Abstract: The invention relates to a titanium dioxide particle with high opacity and UV-greying resistance comprising two silica coats and at least one alumina coat, to a method for the obtaining the same, and to the use of said particle in a method for obtaining a decorative paper laminate or a décor foil. The present invention further pertains a decorative paper laminate or a décor foil containing said coated titanium dioxide particle.Type: GrantFiled: September 19, 2019Date of Patent: April 11, 2023Assignee: Kronos International, Inc.Inventors: Volker Jürgens, Volker Schmitt
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Patent number: 11208260Abstract: The invention is directed to a bag for transporting and handling powdery bulk materials, especially inorganic or organic pigments. Further, the present invention relates to a method for opening the tubular drain of such a bag, as well as to the use of the bag for transporting and handling powdery bulk materials.Type: GrantFiled: October 19, 2017Date of Patent: December 28, 2021Assignee: Kronos International, Inc.Inventors: Ulf Schweitzer, Christian Wolff, Harald Wohlfeld, Thomas Vels
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Publication number: 20200095427Abstract: The invention relates to a titanium dioxide particle with high opacity and UV-greying resistance comprising two silica coats and at least one alumina coat, to a method for the obtaining the same, and to the use of said particle in a method for obtaining a decorative paper laminate or a décor foil. The present invention further pertains a decorative paper laminate or a décor foil containing said coated titanium dioxide particle.Type: ApplicationFiled: September 19, 2019Publication date: March 26, 2020Applicant: Kronos International, Inc.Inventors: Volker Jürgens, Volker Schmitt
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Patent number: 10533102Abstract: The invention relates to a pigment composition for preparing pigmented matt coatings, such as matt paints and printing inks. Further, the invention relates to a process for preparing such pigment composition, and to a coating formulation containing such composition. Finally, the invention is directed to a pigmented matt surface of a substrate, and to the use of the pigment compositions disclosed herein for matting substrates.Type: GrantFiled: February 1, 2017Date of Patent: January 14, 2020Assignee: Kronos International, Inc.Inventors: Frank Mersch, Volker Juergens
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Patent number: 10487214Abstract: A method for coating the surface of a substrate, such as inorganic particles, with a metal oxide. A suspension is formed containing the substrate, a polyvalent anion and a metal ion where the molar ratio of the polyvalent anion to the metal ion is greater than three and the metal ion is precipitated onto the substrate as a metal oxide. Preferably, the method is used to coat titanium dioxide pigment particles with aluminum oxide.Type: GrantFiled: December 22, 2016Date of Patent: November 26, 2019Assignee: Kronos International IncInventor: Norbert Beyer
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Patent number: 10392526Abstract: The invention relates to a matting agent comprising agglomerates of pigment particles, to a method for the preparation of such matting agents, and to coating formulations containing the matting agents disclosed herein. The present invention further relates to pigmented mat surfaces, and to the use of agglomerates of pigment particles for matting pigmented coatings.Type: GrantFiled: October 28, 2016Date of Patent: August 27, 2019Assignee: Kronos International, Inc.Inventors: Janine Siekman, Martin Sandrock, Nicole Kolmer-Anderl
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Patent number: 10351439Abstract: The invention relates to a method for obtaining nanoparticulate titanium dioxide in agglomerate form from a hydrolyzed acidic titanyl compound, the thus obtained titanium dioxide as well as the use thereof as a photocatalyst, process catalyst or adsorbent, especially in aqueous systems.Type: GrantFiled: June 9, 2017Date of Patent: July 16, 2019Assignee: Kronos International, Inc.Inventor: Heinz-Christian Krempels
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Patent number: 10160862Abstract: The invention relates to a process for producing a titanium dioxide pigment obtainable by the sulfate process with a narrow particle size distribution, the pigment itself, and the use of said pigments in coatings and printing inks.Type: GrantFiled: January 20, 2017Date of Patent: December 25, 2018Assignee: Kronos International, Inc.Inventors: Volker Juergens, Siegfried Bluemel, Achim Abdin, Joerg Friedrich, Volker Schmitt
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Patent number: 9962732Abstract: The invention relates to a method for coating the surface of inorganic particles in an aqueous phase, particularly of titanium dioxide pigment particles, with a dense skin of silicon dioxide and at least one further inorganic compound, particularly with aluminum oxide, where the coating largely consists of separate layers. Titanium dioxide pigment particles, treated with SiO2 and Al2O3 according to the invention, are characterized by improved tinting strength, reduced acid solubility and an isoelectric point shifted towards higher pH values.Type: GrantFiled: August 5, 2015Date of Patent: May 8, 2018Assignee: Kronos International, INc.Inventors: Norbert Beyer, Jud-Reginauld Fidalgo-Estevez, Heiko Frahm, Siegfried Bluemel
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Publication number: 20180105435Abstract: The invention relates to a method for separating valuable metal chlorides, particularly titanium tetrachloride and niobium pentachloride, from solid residues, in particular the filter dust generated during the chlorination of raw materials containing iron and titanium in the production of titanium dioxide using the chloride process.Type: ApplicationFiled: October 17, 2016Publication date: April 19, 2018Applicant: Kronos International, Inc.Inventors: Mitja Medved, Thomas Pierau
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Patent number: 9920182Abstract: The invention relates to a method for manufacturing composite particles, particularly composite particles based on titanium dioxide and carbonate, with the help of combined mixing, homogenization and precipitation in a pipeline mixer based on the rotor-stator principle. The method is based on an aqueous suspension of a particulate base component (e.g. titanium dioxide), which is preferably produced in an intermediate vessel equipped with a high-speed agitator. At least one of the required precursor substances and/or a pH-controlling component for precipitating calcium carbonate, for example, is metered into the pipeline mixer, and the calcium carbonate is precipitated. The method can be operated as a continuous process or as a batch process and permits shorter production times. The composite particles produced display homogeneous dispersion of the precipitated particles and the particulate base component.Type: GrantFiled: December 9, 2014Date of Patent: March 20, 2018Assignee: Kronos International, Inc.Inventors: Uwe Wilkenhoener, Juergen Bender, Ingo Grosser
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Patent number: 9909011Abstract: A method for coating the surface of inorganic solid particles in an aqueous suspension, particularly for coating titanium dioxide with SiO2 includes: a) disagglomeration of the solid particles contained in aqueous suspension, b) addition of a water-soluble precursor of the coating substance to the suspension, c) immediately following step b) homogenization of the suspension, where the temperature and pH value of the suspension do not change significantly in steps a) to c), d) feeding the slurry into a tank and precipitation of the coating substance onto the particle surface and, optionally, application of further coatings, and e) separation of the solid particles from the suspension. The method produces to a highly homogeneous and continuous skin on the particle surface, and to less separately precipitated coating substance.Type: GrantFiled: May 27, 2009Date of Patent: March 6, 2018Assignee: Kronos International, Inc.Inventors: Heiko Frahm, Joerg Friedrich, Mark Kaminski, Erwin Schmeier, Lydia Drews-Nicolai, Volker Juergens
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Patent number: 9738542Abstract: The invention relates to a method for the further processing of iron sulfate heptahydrate into iron sulfate monohydrate. An aqueous solution or suspension of iron sulfate heptahydrate is formed and heated in a pressure vessel to a temperature above its boiling temperature at atmospheric pressure and where solid iron sulfate monohydrate and a solution are formed. The solid iron sulfate monohydrate is separated from the solution and fed into a pressure vessel at a temperature above the boiling temperature of the solution at the pressure in the pressure vessel, which is lower than the pressure during separation.Type: GrantFiled: December 3, 2015Date of Patent: August 22, 2017Assignee: Kronos International, Inc.Inventors: Thomas Pierau, Mitja Medved