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    • 1. 发明申请
    • METHOD FOR PRODUCING SMALL SIZE TITANIUM OXIDE PARTICLES
    • 生产小尺寸氧化钛颗粒的方法
    • WO2012066547A1
    • 2012-05-24
    • PCT/IL2011/000894
    • 2011-11-21
    • JOMA INTERNATIONAL ASVITNER, AsherBEN-MOSHE, MattiBAIDOSSI, Mubeen
    • VITNER, AsherBEN-MOSHE, MattiBAIDOSSI, Mubeen
    • C01G23/053
    • C01G23/053B82Y30/00C01G23/0532C01G23/0536C01P2002/60C01P2004/64C01P2006/12
    • The present invention provides a method for the production of small-size titanium oxide particles, comprising the steps of: e) providing a solid containing titanic acid; f) contacting the solid with an acidic aqueous medium thereby forming an aqueous precursor solution at given conditions of temperature lower than 100 °C, Titanium cation concentration lower than 20wt% and higher than 0.1wt%, pH lower than 1 and strong acid concentration higher than 2.5 % and lower than 30 %; g) optionally, adding one or more capping agents to the aqueous precursor solution; and h) modifying at least one of the conditions of the aqueous precursor and maintaining the aqueous precursor at the modified conditions, whereupon precipitation of a precipitate comprising small-size titanium oxide particles takes place, the modifications being selected from at least one of temperature elevation by at least 5 °C and pH elevation by at least 0.1 pH units.
    • 本发明提供了一种生产小尺寸氧化钛颗粒的方法,其包括以下步骤:e)提供含有钛酸的固体; f)使固体与酸性含水介质接触,由此在给定的低于100℃的温度,低于20wt%并高于0.1wt%的钛阳离子浓度,低于1的酸浓度和强酸浓度下形成水性前体溶液 高于2.5%并低于30%; g)任选地,将一种或多种封端剂加入到前体水溶液中; 和h)改变含水前体的至少一种条件并在修改的条件下保持含水前体,随后发生包含小尺寸氧化钛颗粒的沉淀物的沉淀,所述修饰选自温度升高 至少5℃并且pH升高至少0.1pH单位。
    • 9. 发明申请
    • METHODS FOR PRODUCTION OF TITANIUM OXIDE PARTICLES, AND PARTICLES AND PREPARATIONS PRODUCED THEREBY
    • 氧化钛颗粒的生产方法,生产的颗粒和制备方法
    • WO2007074436A1
    • 2007-07-05
    • PCT/IL2006/001468
    • 2006-12-21
    • JOMA INTERNATIONAL ASVITNER, AsherEYAL, Aharon
    • VITNER, AsherEYAL, Aharon
    • C01G23/053C01G23/08
    • C01G23/053B82Y30/00C01G23/0532C01G23/0536C01G23/08C01P2004/62C01P2004/64C01P2006/12
    • The invention provides a method for the formation of small-size titanium oxide particles, comprising the steps of a) preparing a starting aqueous solution comprising at least one of titanic ions and complexes thereof, at a concentration of at least 0.1 % w/w titanium; b) maintaining the solution at a temperature lower than 70°C for a retention time in which hydrolysis takes place, the extent of the hydrolysis being sufficient to produce O.immol protons per mmol of titanium present in solution, wherein the time does not exceed 14 days, to form a system containing a retained solution; and c) adjusting the conditions in the system by at least one of the steps of: i) heating the retained solution to elevate the temperature thereof by at least 1 °C; ii) changing the pH of the retained solution by at least 0.1 units; and iii) diluting the retained solution by at least 20% whereby there are formed particles, wherein the majority of the particles formed are between about 2nm and about 500nm in size.
    • 本发明提供一种形成小尺寸氧化钛颗粒的方法,包括以下步骤:a)制备含有至少0.1%w / w钛的钛离子及其配合物中的至少一种的起始水溶液 ; b)将溶液保持在低于70℃的温度下进行水解的保留时间,水解的程度足以产生每摩尔溶液中存在的每毫摩尔钛的0.1摩尔质子,其中时间不超过 14天,形成含有保留溶液的体系; 以及c)通过以下步骤中的至少一个步骤来调节所述系统中的条件:i)加热所述保留的溶液以使其温度升高至少1℃; ii)将保留溶液的pH值改变至少0.1单位; 和iii)将保留的溶液稀释至少20%,由此形成颗粒,其中形成的大部分颗粒的尺寸在约2nm至约500nm之间。