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    Process of producing phosphates and phosphoric acid
    2.
    发明授权
    Process of producing phosphates and phosphoric acid 失效
    生产磷酸盐和磷酸的方法

    公开(公告)号：US4154800A

    公开(公告)日：1979-05-15

    申请号：US874039

    申请日：1978-02-01

    申请人： Curtis W. Cannon ,  Chung-Kong Chow

    发明人： Curtis W. Cannon ,  Chung-Kong Chow

    IPC分类号： A23K1/175 ,  C01B25/01 ,  C01B25/232 ,  C01B25/32 ,  C05B11/08 ,  C01F11/46

    CPC分类号： C05B11/08 ,  A23K20/26 ,  C01B25/01 ,  C01B25/232 ,  C01B25/32

    摘要： The process of treating insoluble phosphate ore in the form of calcium phosphate, such as phosphate rock or bone phosphate, at near ambient conditions with sulfur trioxide or sulfuric acid as reactants in the presence of a liquid anhydrous dispersion media of, preferably, sulfur trioxide, sulfur dioxide, or their mixtures in liquid form so that the contacting of the ore is made in the form of an anhydrous slurry, to make the phosphorous content available as a nutrient or as phosphoric acid, and subsequently separating the dispersion media from the contacted ore preceding aqueous contact or extraction of the phosphorous constituent. The presence of sulfur dioxide in the anhydrous dispersion media is desirable to minimize operational difficulties associated with the proximity of the vaporization and solidification points of sulfur trioxide.The process may be carried out with the sulfur trioxide and sulfur dioxide as dispersants as long as sulfuric acid content is limited to the amount required for reaction with the phosphate material. Sulfur trioxide can serve as both reactant and dispersant. The contact of the ore in the presence of the excesses of anhydrous liquid permits efficient contact with the ore as a slurry. Sulfuric acid may be formed "in situ" from the sulfur trioxide associated with the ore upon aqueous contact or extraction after the sulfur trioxide treatment and removal of the excess required for reaction.

    摘要翻译： 在三氧化硫或硫酸作为反应物的情况下，在最好是三氧化硫的液体无水分散介质的存在下，在接近环境条件下处理磷酸钙形式的不溶性磷酸盐矿物如磷酸盐岩或骨磷酸盐的方法， 二氧化硫或它们的液体混合物，使得矿石的接触以无水浆料的形式制成，以使磷含量可作为营养物质或作为磷酸获得，随后将分散介质与接触的矿石分离 之前的含水接触或提取的磷成分。 在无水分散介质中存在二氧化硫是期望最小化与三氧化硫的蒸发和固化点的接近度相关的操作困难。

    Process for the treatment of a calcium aluminophosphate
    9.
    发明授权
    Process for the treatment of a calcium aluminophosphate 失效
    磷酸钙钙的处理方法

    公开(公告)号：US4321244A

    公开(公告)日：1982-03-23

    申请号：US175583

    申请日：1980-08-05

    申请人： Claude Magnier ,  Jean Grosbois

    发明人： Claude Magnier ,  Jean Grosbois

    IPC分类号： C01G49/14 ,  C01B25/01 ,  C01B25/225 ,  C01B25/232 ,  C01F7/74 ,  C01F11/46 ,  C01B25/16

    CPC分类号： C01B25/225 ,  C01B25/232

    摘要： A process for treating a rock essentially constituted by calcium aluminophosphate, comprising the treatment of the ground rock with a concentrated sulfuric acid in stoichiometric excess with respect to calcium and aluminum, at a temperature of above about 120.degree. C., for a time between a few minutes and about 5 hours, followed by controlled water take-up. Subsequently, a residue containing substantially all the calcium and the aluminum of the rock and a solution of the acids serving to digest a tricalciumphosphate charge are separated. The process is particularly suitable for the treatment of Thies phosphate ore.

    摘要翻译： 一种用于处理基本上由磷酸铝钙构成的岩石的方法，包括在高于约120℃的温度下，以相对于钙和铝的化学计量过量的浓硫酸处理研磨的岩石，时间为 几分钟和约5小时，其次是受控的吸水。 随后，分离含有基本上所有钙和铝的铝的残余物和用于消化磷酸三钙电荷的酸的溶液。 该工艺特别适用于硫酸盐矿石的处理。

    Process for the preparation of phosphoric acid
    10.
    发明授权
    Process for the preparation of phosphoric acid 失效
    磷酸的制备方法

    公开(公告)号：US3935298A

    公开(公告)日：1976-01-27

    申请号：US375828

    申请日：1973-07-02

    申请人： Yujiro Sugahara ,  Yoshibumi Noshi ,  Hiroyuki Naito ,  Akira Takahashi ,  Shoji Shoji

    发明人： Yujiro Sugahara ,  Yoshibumi Noshi ,  Hiroyuki Naito ,  Akira Takahashi ,  Shoji Shoji

    IPC分类号： C01B25/22 ,  C01B25/232 ,  C01B25/234 ,  C01F11/46 ,  C01B25/16

    CPC分类号： C01B25/232 ,  C01B25/234

    摘要： When phosphate rock and sulfuric acid are mixed under such conditions that gypsum dihydrate is stably formed and sulfuric acid is added to the phosphate rock in an amount not exceeding the amount equivalent to a calcium component in the phosphate rock, small masses of the reaction product between the phosphate rock and sulfuric acid can be maintained in the non-disintegrable form throughout extraction of phosphoric acid from said reaction product, and phosphoric acid can be extracted from such reaction product at a high rate in a good yield.

    摘要翻译： 当磷酸盐岩和硫酸在稳定形成石膏二水合物并且向磷酸盐岩添加硫酸的条件下混合磷酸盐岩和硫酸，其量不超过磷酸盐岩中与钙成分相当的量时，小质量的反应产物在 在从所述反应产物中提取磷酸的同时，磷酸盐岩和硫酸可以以不可分解的形式保持，并且可以以高收率从该反应产物中提取磷酸。