Surface treatment method for making high durability universal titanium dioxide rutile pigment
    1.
    发明授权
    Surface treatment method for making high durability universal titanium dioxide rutile pigment 有权
    表面处理方法制造高耐久性通用二氧化钛金红石颜料

    公开(公告)号:US09505022B2

    公开(公告)日:2016-11-29

    申请号:US13693667

    申请日:2012-12-04

    摘要: A method is provided for the wet surface treatment of titanium dioxide, in order to produce durable universal grade titanium dioxide rutile pigment with superior optical properties. The method is characterized in that, a hydrous zirconia and silica composite layer is co-precipitated at acidic pH. Then, a layer of alumina is precipitated under a range of pH required for complete precipitation above the initial composite layer. The upper pH limit of the slurry during the alumina precipitation can be well controlled to avoid any chance for dissolution or damage of the composite zirconia-silica layer formed. Zirconia-silica composite layers and alumina thus precipitated advantageously improve the competence of the layers formed over a TiO2 base and provide improved durability with superior optical performance. The total surface treatment cycle time and chemicals used are minimal compared to conventional methods. Improvements in throughput and washing efficiency are also realized.

    摘要翻译: 提供了一种用于二氧化钛的湿表面处理的方法,以便产生具有优异光学性能的耐久的通用级二氧化钛金红石颜料。 该方法的特征在于,水合氧化锆和二氧化硅复合层在酸性pH下共沉淀。 然后,在初始复合层之上的完全沉淀所需的pH范围内沉淀出一层氧化铝。 氧化铝沉淀期间浆料的上限pH值可以很好地控制,以避免形成的复合氧化锆 - 二氧化硅层的任何溶解或损坏的机会。 氧化锆 - 二氧化硅复合层和由此沉淀的氧化铝有利地提高了形成在TiO 2基体上的层的能力,并提供了优异的光学性能的改善的耐久性。 与常规方法相比,总的表面处理循环时间和所用的化学品是最小的。 吞吐量和洗涤效率的提高也得以实现。

    SURFACE TREATMENT METHOD FOR MAKING HIGH DURABILITY UNIVERSAL TITANIUM DIOXIDE RUTILE PIGMENT
    4.
    发明申请
    SURFACE TREATMENT METHOD FOR MAKING HIGH DURABILITY UNIVERSAL TITANIUM DIOXIDE RUTILE PIGMENT 有权
    表面处理方法制造高耐久性通用二氧化钛颗粒颜料

    公开(公告)号:US20140154413A1

    公开(公告)日:2014-06-05

    申请号:US13693667

    申请日:2012-12-04

    IPC分类号: B05D1/18

    摘要: A method is provided for the wet surface treatment of titanium dioxide, in order to produce durable universal grade titanium dioxide rutile pigment with superior optical properties. The method is characterized in that, a hydrous zirconia and silica composite layer is co-precipitated at acidic pH. Then, a layer of alumina is precipitated under a range of pH required for complete precipitation above the initial composite layer. The upper pH limit of the slurry during the alumina precipitation can be well controlled to avoid any chance for dissolution or damage of the composite zirconia-silica layer formed. Zirconia-silica composite layers and alumina thus precipitated advantageously improve the competence of the layers formed over a TiO2 base and provide improved durability with superior optical performance. The total surface treatment cycle time and chemicals used are minimal compared to conventional methods. Improvements in throughput and washing efficiency are also realized.

    摘要翻译: 提供了一种用于二氧化钛的湿表面处理的方法,以便产生具有优异光学性能的耐久的通用级二氧化钛金红石颜料。 该方法的特征在于,水合氧化锆和二氧化硅复合层在酸性pH下共沉淀。 然后,在初始复合层之上的完全沉淀所需的pH范围内沉淀出一层氧化铝。 氧化铝沉淀期间浆料的上限pH值可以很好地控制,以避免形成的复合氧化锆 - 二氧化硅层的任何溶解或损坏的机会。 氧化锆 - 二氧化硅复合层和由此沉淀的氧化铝有利地提高了形成在TiO 2基体上的层的能力,并提供了优异的光学性能的改善的耐久性。 与常规方法相比,总的表面处理循环时间和所用的化学品是最小的。 吞吐量和洗涤效率的提高也得以实现。

    CHLORIDE INGRESS-RESISTANT CONCRETE
    7.
    发明申请
    CHLORIDE INGRESS-RESISTANT CONCRETE 审中-公开
    氯化物耐腐蚀混凝土

    公开(公告)号:US20110135919A1

    公开(公告)日:2011-06-09

    申请号:US12634248

    申请日:2009-12-09

    摘要: An reinforced cementitious material structure is provided that includes a cementitious material made from an industrial waste byproduct from a titanium metal production process or from a titanium dioxide production process. The byproduct is used as a partial cement replacement. In some embodiments, the reinforced cementitious material structure can comprise a metal reinforcing structure in contact with a hardened cementitious material. The hardened cementitious material can comprise cement and the industrial waste byproduct. The cement can be used to make concrete and other cementitious material products for structural and non-structural uses, with little or no corrosion or other deterioration of an embedded metal reinforcing structure.

    摘要翻译: 提供了一种增强的水泥质材料结构,其包括由钛金属生产工艺或二氧化钛生产工艺的工业废弃物副产物制成的水泥质材料。 副产物用作部分水泥替代品。 在一些实施例中,增强胶结材料结构可以包括与硬化水泥质材料接触的金属加强结构。 硬化的水泥质材料可以包括水泥和工业废弃物副产物。 水泥可用于制造用于结构和非结构用途的混凝土和其他水泥材料产品,很少或没有腐蚀或其他劣化的嵌入金属加固结构。

    Method for purification of spent sulfuric acid from titanium dioxide rutile industry
    10.
    发明授权
    Method for purification of spent sulfuric acid from titanium dioxide rutile industry 有权
    从二氧化钛金红石工业中纯化废硫酸的方法

    公开(公告)号:US09150440B2

    公开(公告)日:2015-10-06

    申请号:US13468427

    申请日:2012-05-10

    摘要: A method for the purification of spent sulfuric acid and particularly the purification of spent acid, from titanium dioxide rutile manufacture through a chloride route, is provided. In the chloride route of titanium dioxide manufacture, sulfuric acid is used to clean the un-reacted gaseous flow coming out of the oxidizer, so the spent acid mainly contains un-reacted Ti4+ ions, trace amounts of Fe3+ ions, and NO2 gas. Titanium phosphate can be precipitated using acidic and or alkaline phosphate-containing precipitants in stoichiometric amounts. The method can include the addition of cutting water to commence the precipitation in two or more steps, when an acidic precipitant is used, and in one step with half the volume of water when an alkaline precipitant is used.

    摘要翻译: 提供了从二氧化钛金红石制造通过氯化物路线纯化废硫酸,特别是纯化废酸的方法。 在制造二氧化钛的氯化物路线中,使用硫酸清洗从氧化剂出来的未反应的气体流,因此废酸主要含有未反应的Ti4 +离子,痕量的Fe3 +离子和NO2气体。 可以使用化学计量的酸性和/或碱性磷酸盐沉淀剂沉淀磷酸钛。 该方法可以包括添加切割水以在使用酸性沉淀剂的情况下以两个或多个步骤开始沉淀,并且在使用碱性沉淀剂时,一步加入一半体积的水。