会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 2. 发明专利
    • Method of purifying phosphoric acid, and high-purity polyphosphoric acid
    • 纯化磷酸的方法和高纯度多磷酸
    • JP2009209041A
    • 2009-09-17
    • JP2009152991
    • 2009-06-26
    • Toyobo Co Ltd東洋紡績株式会社
    • HOTTA SEISHIKUBOTA FUYUHIKO
    • C01B25/24C01B25/237
    • C01B25/24C01B25/237
    • PROBLEM TO BE SOLVED: To provide a novel method for removing arsenic from phosphoric acid which does not require any of a filtering and a degassing processes, which are necessary in the sulfide precipitation method, does not give a large amount of residual sodium, can be applied to a phosphoric acid having a high concentration, particularly to polyphosphoric acid, and can be practiced at a low cost; and to provide a high-purity polyphosphoric acid having a low content of arsenic, which is not conventionally seen, and low contents of heavy metals, silica, sodium and the like, that is, ≤20 ppm of iron (Fe), ≤100 ppm of sodium (Na), ≤50ppm of silica (SiO 2 ) and ≤1 ppm of arsenic (As), and further ≤5 ppm of chromium (Cr), ≤5 ppm of nickel (Ni) and ≤5 ppm of molybdenum (Mo). SOLUTION: The method for purification of phosphoric acid comprises contacting phosphoric acid containing arsenic with a hydrogen halide to remove the arsenic from the phosphoric acid and comprises contacting phosphoric acid containing arsenic with a hydrogen halide in the presence of a compound which can produce a hydrogen halide under an acidic condition. COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:为了提供一种从硫酸盐沉淀法中所必需的不需要任何过滤和脱气处理的从磷酸中除去砷的新方法,不会产生大量的残留钠 可以应用于高浓度的磷酸,特别是多磷酸,可以低成本地实施; 并且提供具有低的砷含量的高纯度多磷酸,这是不常见的,重金属,二氧化硅,钠等的含量低,即铁(Fe)≤20ppm,≤100 ppm的钠(Na),≤50ppm的二氧化硅(SiO 2 )和≤1ppm的砷(As),另外≤5ppm的铬(Cr),≤5ppm的镍 )和≤5ppm的钼(Mo)。 解决方案:磷酸的纯化方法包括使含砷的磷酸与卤化氢接触以从磷酸中除去砷,并且包括在可产生化合物的化合物存在下使含砷的砷酸与卤化氢接触 在酸性条件下的卤化氢。 版权所有(C)2009,JPO&INPIT