Process for separation of magnesium-based, and possibly fluorine-and
aluminum-based impurities from a wet-produced phosphoric acid
    92.
    发明授权
    Process for separation of magnesium-based, and possibly fluorine-and aluminum-based impurities from a wet-produced phosphoric acid 失效
    从湿法制备的磷酸中分离镁基和可能的氟和铝基杂质的方法

    公开(公告)号:US4692323A

    公开(公告)日:1987-09-08

    申请号:US878976

    申请日:1986-06-12

    IPC分类号: C01B25/237 C01B25/16

    CPC分类号: C01B25/237

    摘要: The invention concerns a process for separating magnesium-based impurities contained in a wet-process produced phosphoric acid. This process comprises adding an ammonium compound R(NH.sub.4) soluble in the said phosphoric acid, and, where called for, a fluorine compound and an aluminum compound to this phosphoric acid so as to induce a reaction forming an insoluble complex (NH.sub.4).sub.x (Mg).sub.y (Al).sub.z (F, OH).sub.6 ; this complex crystallizes in large grains and is easily separated subsequently by filtration and decantation.

    摘要翻译: PCT No.PCT / FR85 / 00247 Sec。 371日期:1986年6月12日 102(e)日期1986年6月12日PCT提交1985年9月13日PCT公布。 出版物WO86 / 01792 日期:1986年3月27日。本发明涉及一种用于分离湿法生产的磷酸中所含的镁基杂质的方法。 该方法包括向该磷酸中加入可溶于所述磷酸的铵化合物R(NH 4),并向其中加入氟化合物和铝化合物,以引起形成不溶性络合物(NH 4)x( Mg)y(Al)z(F,OH)6; 该复合物在大颗粒中结晶,并且随后通过过滤和倾析容易地分离。