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    • 10. 发明申请
    • METHOD FOR THE PRODUCTION OF PHOSPHORIC ACID AND/OR A SALT THEREOF AND PRODUCTS THUS OBTAINED
    • 生产磷酸和/或其盐的方法和获得的产品
    • WO2004002888A3
    • 2004-02-26
    • PCT/BE0300111
    • 2003-06-26
    • ECOPHOSTAKHIM MOHAMED
    • TAKHIM MOHAMED
    • C01B25/22C01B25/32C01B25/46C05B11/12
    • C01B25/322C01B25/2212C01B25/461C05B11/12
    • A method for the production of phosphoric acid comprising a phosphate ore attack by a first aqueous chlorohydric acid solution, separation in the attack liquor between a solid insoluble phase containing impurities and a separate aqueous phase comprising phosphate ions in a solution, chloride ions and calcium ions, neutralization of said attack phase separated from the liquor by adding a calcium compound so that water-insoluble calcium phosphate can be formed with said phosphate ions, precipitating a separation in said neutralized aqueous phase comprising chloride ions and calcium ions in a solution and a solid precipitated phase based on said water-insoluble calcium phosphate, and solubilization of at least one part of the precipitated solid phase in a separated manner in a second aqueous chlorohydric acid solution, with formation of an aqueous solution containing phosphate ions, chloride ions and calcium ions to be extracted by an organic extractant in a liquid-liquid-type extraction.
    • 一种生产磷酸的方法,其包括由第一含水羟基酸溶液进行的磷酸盐矿石侵蚀,在渗透液中分离含有杂质的固体不溶相和在溶液中含有磷酸根离子的分离的水相,氯离子和钙离子 通过加入钙化合物使所述攻击阶段与液体中和,使得可以用所述磷酸根离子形成水不溶性磷酸钙,使溶液中含有氯化物离子和钙离子的所述中和的水相沉淀出固体 基于所述水不溶性磷酸钙的沉淀相,并将分离的至少一部分沉淀固相溶解在第二含水羟基酸溶液中,形成含有磷酸根离子,氯离子和钙离子的水溶液 通过液 - 液型萃取中的有机萃取剂萃取。