Patents Assigned to Sachtleben Pigments Oy
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Patent number: 9212066Abstract: Processes of preparing metal titanate from one or more metal compounds, and a product provided by the process. In one embodiment, sodium titanate and an ionic metal compound are mixed into an aqueous mixed slurry, which is allowed to react into metal titanate at the boiling point of the mixed slurry or below, by mixing it at normal pressure and in a normal gaseous atmosphere. After this, the metal titanate product is optionally washed, and/or filtered and dried.Type: GrantFiled: November 4, 2008Date of Patent: December 15, 2015Assignee: SACHTLEBEN PIGMENTS OYInventors: Ralf-Johan Lamminmäki, Jani Kallioinen, Arja-Leena Ruohonen
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Patent number: 8840814Abstract: A lithium titanate product, the formula of which is in the form of LixTiyOz, and wherein y is 1, the x:y molar is 1.1-1.8, while the z:y molar ratio is 2.0-4.5. Also disclosed is a method of preparing alkali metal titanates, such as lithium titanate, at a low temperature of below 100° C., from an aqueous titanium-containing slurry and an alkali metal compound.Type: GrantFiled: November 4, 2008Date of Patent: September 23, 2014Assignee: Sachtleben Pigments OyInventors: Ralf-Johan Lamminmäki, Margit Rajamäki, Merja Kruunari
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Patent number: 8268203Abstract: A method for producing microcrystalline titanium dioxide in the rutile form having a crystal size below 15 nm by an aqueous method, and a titanium dioxide product doped with silicon obtained by the method. The method generally includes adding a silicon containing compound during crystal formation to provide said titanium dioxide product with a small crystal size.Type: GrantFiled: June 30, 2009Date of Patent: September 18, 2012Assignee: Sachtleben Pigments OyInventors: Ralf-Johan Lamminmäki, Johanna Niinimäki
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Patent number: 8182602Abstract: The invention relates to a method of preparing a well-dispersable, rutile-structured, microcrystalline titanium dioxide product, a product prepared by the method, and an effect paint and a lacquer provided by means of the product. In the method, the titanium dioxide starting material is first treated with a base to have an alkaline pH value, after which it is treated with an acid to have a hydrochloric acid content of 8 to 30 g/l, neutralized, processed, and calcinated. In particular, the preparation method is characterized by the use of a pretreatment chemical before the calcination stage to improve the dispersability.Type: GrantFiled: August 15, 2008Date of Patent: May 22, 2012Assignee: Sachtleben Pigments OyInventors: Ralf-Johan Lamminmäki, Esa Latva-Nirva, Riitta Linho, Johanna Niinimäki, Visa Vehmanen
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Patent number: 8128903Abstract: The invention relates to a method of controlling the solubility of granular material by treating a precipitate comprising iron(II)sulphate monohydrate originating from titanium dioxide production, in which method the reaction temperature is allowed to increase at the most to a temperature of 120° C., to a plant for treating a precipitate comprising iron(II)sulphate monohydrate, to a product and its uses. A typical method according to the invention comprises the steps of mixing water to the reaction mixture in the said mixing apparatus, and keeping the amount of neutralizing agent sufficient to give a pH value from 1.5 to 4, preferably from 1.5 to 3, to the end product in order to obtain a granular material having a high soluble iron(II) content or keeping the amount of neutralizing agent sufficient to give a pH value ?9 to the end product in order to obtain a granular material having a low solubility.Type: GrantFiled: June 25, 2007Date of Patent: March 6, 2012Assignee: Sachtleben Pigments OyInventors: Juhatuomas Vuorisalo, Joni Pärnänen
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Publication number: 20110278495Abstract: A lithium titanate product, the formula of which is in the form of LixTiyOz, and wherein, when y is 1, the x:y molar ratio is 1.1-1.8, while the z:y molar ratio is 2.0-4.5. Also disclosed is a method of preparing alkali metal titanates, such as lithium titanate, at a low temperature of below 100° C., from an aqueous titanium-containing slurry and an alkali metal compound.Type: ApplicationFiled: November 4, 2008Publication date: November 17, 2011Applicant: SACHTLEBEN PIGMENTS OYInventors: Ralf-Johan Lamminmäki, Margit Rajamäki, Merja Kruunari
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Publication number: 20110274614Abstract: Processes of preparing metal titanate from one or more metal compounds, and a product provided by the process. In one embodiment, sodium titanate and an ionic metal compound are mixed into an aqueous mixed slurry, which is allowed to react into metal titanate at the boiling point of the mixed slurry or below, by mixing it at normal pressure and in a normal gaseous atmosphere. After this, the metal titanate product is optionally washed, and/or filtered and dried.Type: ApplicationFiled: November 4, 2008Publication date: November 10, 2011Applicant: SACHTLEBEN PIGMENTS OYInventors: Ralf-Johan Lamminmäki, Jani Kallioinen, Arja-Leena Ruohonen
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Publication number: 20110180769Abstract: A method for producing microcrystalline titanium dioxide in the rutile form having a crystal size below 15 nm by an aqueous method, and a titanium dioxide product doped with silicon obtained by the method. The method generally includes adding a silicon containing compound during crystal formation to provide said titanium dioxide product with a small crystal size.Type: ApplicationFiled: June 30, 2009Publication date: July 28, 2011Applicant: SACHTLEBEN PIGMENTS OYInventors: Ralf-Johan Lamminmäki, Johanna Niinimäki
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Patent number: 7662359Abstract: The invention relates to a process for manufacturing a particulate titanium dioxide product, wherein hydrated titanium dioxide is precipitated from an aqueous solution of titanium oxychloride by adding to the solution titanium dioxide particles as crystal nuclei and the product obtained from the precipitation step is isolated and optionally calcined. The process is characterized by the addition of crystal nuclei to an aqueous solution of titanium oxychloride having a content of >90 g TiO2/l calculated as TiO2 and the performance of precipitation at a temperature below the boiling point of the said aqueous solution and at normal pressure. In addition, the invention relates to a titanium dioxide product prepared by using the process, the use of the product as a photocatalyst, and a photocatalyst, which comprises a titanium dioxide product prepared according to the invention.Type: GrantFiled: February 4, 2005Date of Patent: February 16, 2010Assignee: Sachtleben Pigments OyInventors: Saila Mariatta Karvinen, Ralf-Johan Lamminmäki