PROCESS FOR THE PRODUCTION OF ZINC OXIDE POWDER
    8.
    发明申请
    PROCESS FOR THE PRODUCTION OF ZINC OXIDE POWDER 审中-公开
    氧化锌粉的生产工艺

    公开(公告)号:US20070172415A1

    公开(公告)日:2007-07-26

    申请号:US11612112

    申请日:2006-12-18

    IPC分类号: C01G9/02

    摘要: Zinc oxide powder is prepared by a process having the following steps a) generating of a zinc vapor-containing stream in a vaporization zone; b) oxidizing the zinc vapor by reaction with an oxygen-containing gas thereby forming zinc oxide powder in an oxidation zone; and c) cooling of the reaction mixture with water or an inert gas, and separation of the zinc oxide powder in a cooling/isolation zone, wherein aa) in the vaporization zone, a gas stream of an inert gas and a fuel gas is passed through a zinc melt which has a temperature of 450 to

    摘要翻译: 通过具有以下步骤的方法制备氧化锌粉末:a)在汽化区产生含有含锌蒸气的料流; b)通过与含氧气体反应氧化锌蒸气,从而在氧化区形成氧化锌粉末; 和c)用水或惰性气体冷却反应混合物,并且在蒸发区中的aa),惰性气体和燃料气体的气流中的氧化锌粉末在冷却/隔离区中分离, 通过温度为450〜900℃的锌熔体,由此形成锌蒸汽,燃料气体的含量为1〜50体积%。 %,基于惰性气体和燃料气体的总和,氧化区中锌蒸气与燃料气体的摩尔商为0.01〜50,bb)为含有含氧气体和蒸汽的第二气流 加入到锌蒸汽,燃料气体和惰性气体的气流中,其量使得氧化区中的温度为500至1100℃,其中氧含量至少足以将所有燃料气体从 蒸发区和锌蒸汽,并且蒸汽通过燃料气体与引入氧化区的含氧气体的反应而产生

    Cerium oxide powder and cerium oxide dispersion
    9.
    发明申请
    Cerium oxide powder and cerium oxide dispersion 失效
    氧化铈粉末和氧化铈分散体

    公开(公告)号:US20070048205A1

    公开(公告)日:2007-03-01

    申请号:US11502568

    申请日:2006-08-11

    IPC分类号: C01F17/00

    摘要: Cerium oxide powder having carbonate groups and made of crystalline primary particles containing cerium oxide and having carbonate groups on the surface and in a region close to the surface, and having a BET surface area of from 25 to 150 m2/g, a mean diameter of from 5 to 50 nm, a carbonate concentration in the region close to the surface decreasing inwardly from the surface, a carbon content due to carbonate groups on the surface of from 5 to 50% by area, a carbon content due to carbonate groups at a depth of about 5 nm in a region close to the surface of from 0 to 30% by area, a content of cerium oxide calculated as CeO2 and based on the powder of at least 99.5% by weight and a content of organic and inorganic carbon of from 0.01 to 0.3% by weight. A dispersion containing this powder.

    摘要翻译: 具有碳酸酯基的氧化铈粉末,其表面和靠近表面的区域中含有氧化铈并具有碳酸酯基团的结晶一次粒子,BET表面积为25〜150μm2 / > g,平均直径为5〜50nm,表面附近从表面向内减少的区域中的碳酸盐浓度,表面的碳酸酯基的碳含量为5〜50面积%, 在接近表面0〜30%的面积的范围内,由于碳酸酯基团在约5nm的深度引起的碳含量,以CeO 2计算的氧化铈含量和基于粉末 至少99.5重量%,有机和无机碳的含量为0.01至0.3重量%。 含有该粉末的分散体。