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    • 50. 发明申请
    • Methods for Purifying an Aqueous Hydrochloric Acid Solution
    • 纯化盐酸水溶液的方法
    • US20100150816A1
    • 2010-06-17
    • US12516680
    • 2007-11-28
    • Stephen W. OldigesMark Andrew HarmerJesse S. JonesDavid C. Confer
    • Stephen W. OldigesMark Andrew HarmerJesse S. JonesDavid C. Confer
    • C01B7/07
    • C01B7/0706C02F1/24C02F1/5236C02F1/56C02F1/74C02F2101/101C02F2101/12C02F2101/20
    • Methods for purifying an aqueous hydrochloric acid solution waste stream having an impurity fraction comprising an initial Ti fraction, an initial S fraction and an initial Si fraction; that provide purified aqueous hydrochloric acid solutions having a final Ti fraction of less than 250 ppm, a final S fraction of less than 200 ppm, and a final Si fraction of less than 10 ppm, which may be determined with inductively coupled plasma spectroscopy. Process steps in various embodiments include sparging with an gas; mixing the sparged solution with a precipitation agent comprising a sufficient amount of an alkali earth metal salt and, optionally, a phosphoric acid source, to provide a metal salt precipitate; and mixing the initial aqueous acid solution or, optionally, the sparged aqueous acid solution, with a flocculating polymer. A preferred alkali earth metal salt is barium chloride and preferred flocculating polymers are poly(diallyldialkylammonium chloride) homopolymers and copolymers.
    • 纯化含有初始Ti级分,初始S级分和初始Si级分的杂质级分的盐酸水溶液废水流的方法; 其提供具有小于250ppm的最终Ti馏分,小于200ppm的最终S馏分和小于10ppm的最终Si分数的纯化的盐酸水溶液,其可以通过电感耦合等离子体光谱法测定。 各种实施方案中的方法步骤包括用气体喷射; 将喷射溶液与包含足够量的碱土金属盐和任选的磷酸源的沉淀剂混合以提供金属盐沉淀; 并将初始的酸性水溶液或任选地,鼓泡的酸性水溶液与絮凝聚合物混合。 优选的碱土金属盐是氯化钡,优选的絮凝聚合物是聚(二烯丙基二烷基氯化铵)均聚物和共聚物。