申请人:Olin Corporation
公开号:US04348371A1
公开(公告)日:1982-09-07
A process for the recovery of calcium chloride hydrates and calcium chlorate compounds comprises: (a) blending an effluent comprised of an aqueous solution of calcium chloride, calcium chlorate, and calcium hypochlorite and having a weight ratio of Ca(ClO.sub.3).sub.2 /CaCl.sub.2 of less than about 0.2 with a second mother liquor comprised of an aqueous solution of calcium chlorate and calcium chloride and having a weight ratio of Ca(ClO.sub.3).sub.2 /CaCl.sub.2 of greater than about 1.0 to form a blended solution; (b) feeding the blended solution to a first crystallizer to form a slurry of calcium chloride hydrate in a first mother liquor; (c) separating the crystals of calcium chloride hydrate from the first mother liquor, the first mother liquor having a weight ratio of Ca(ClO.sub.3).sub.2 /CaCl.sub.2 of at least about 1.0; (d) feeding the first mother liquor to an evaporative crystallizer to form a crystalline calcium chlorate compound; (e) separating the crystalline calcium chlorate compound from a second mother liquor; (f) recovering the crystalline calcium chlorate compound; and (g) returning the second mother liquor to step (a).
一种回收氯化钙水合物和氯酸钙化合物的过程,包括:(a)将由氯化钙、氯酸钙和次氯酸钙组成的水溶液组成的流出液,其Ca(ClO.sub.3).sub.2 /CaCl.sub.2的重量比小于约0.2,与由氯酸钙和氯化钙组成的水溶液组成的第二母液混合,其Ca(ClO.sub.3).sub.2 /CaCl.sub.2的重量比大于约1.0,以形成混合溶液;(b)将混合溶液送入第一结晶器中,形成钙氯化物水合物的浆液和第一母液;(c)从第一母液中分离钙氯化物水合物的晶体,第一母液的Ca(ClO.sub.3).sub.2 /CaCl.sub.2的重量比至少为约1.0;(d)将第一母液送入蒸发结晶器中,形成结晶的氯酸钙化合物;(e)从第二母液中分离出结晶的氯酸钙化合物;(f)回收结晶的氯酸钙化合物;(g)将第二母液返回步骤(a)。