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    Production of feed grade dicalcium phosphate from mixtures of phosphoric and nitric acids
    2.
    发明授权
    Production of feed grade dicalcium phosphate from mixtures of phosphoric and nitric acids 失效
    磷酸二氢铵混合物生产磷酸二氢钙

    公开(公告)号：US3634029A

    公开(公告)日：1972-01-11

    申请号：US3634029D

    申请日：1968-11-07

    申请人： AZOTE OFFICE NAT IND

    发明人： AMANRICH ROBERT

    IPC分类号： C01B25/46 ,  C01B25/32

    CPC分类号： C01B25/46

    摘要： Feed grade dicalcium phosphate is produced from mixtures of phosphoric and nitric acids wherein the H3PO4/HNO3 molar proportion ranges from 0.5 to 9.0, the phosphate being precipitated by means of a calcium compound, with addition of ammonia to keep the pH at 6 to 7, in the presence of 5 to 35 percent, desirably 10 to 25 percent, by weight of C1 to C8 aliphatic alcohol(s). The invention can be applied to solutions produced by extraction by means of C1 to C8 aliphatic alcohol(s) resulting from the decomposition of natural phosphates with nitric acid, and the extraction and the dicalcium phosphate production stages can be carried out concomitantly.

    摘要翻译： 饲料级磷酸二钙由磷酸和硝酸的混合物产生，其中H 3 PO 4 / HNO 3摩尔比为0.5-9.0，磷酸盐通过钙化合物沉淀，加入氨以保持pH在6至7， 在5至35重量％，优选10至25重量％的C 1至C 8脂族醇的存在下进行。 本发明可以应用于通过用硝酸将天然磷酸盐分解而得到的C1〜C8脂族醇进行萃取而得到的溶液，并且萃取和磷酸二钙生产阶段可以同时进行。