公开(公告)号：US3642455A

公开(公告)日：1972-02-15

申请号：US3642455D

申请日：1968-04-12

申请人： SALZDETFURTH AG

发明人： HAHN BURKHARD J ,  REISE ROLF M E ,  RASCHKA WALTER R

IPC分类号： C01F5/30 ,  C01F5/40

CPC分类号： C01F5/30 ,  C01F5/40

摘要： Aqueous brines containing both magnesium chloride and magnesium sulfate are treated to recover a low-sulfate bischofite (MgCl2.6H2O). The brines are subjected to evaporation, as required, to produce a brine which is substantially supersaturated with respect to magnesium sulfate. The evaporation is conducted at high temperatures to avoid crystallization of magnesium chloride. The supersaturated magnesium sulfate brine is then held at high temperature under conditions which maintain the magnesium chloride in solution for a sufficiently long duration to permit the crystallization of magnesium sulfate as MgSO4.5/4 H2O. Clarified brine recovered from the resulting sulfate-crystal slurry is subjected to evaporation under vacuum and at low temperature, preferably below about 90* C., at sufficient rate to produce a low-sulfate bischofite crystal crop.

摘要翻译： 处理含有氯化镁和硫酸镁的含水盐水以回收低硫酸盐双磷铁矿（MgCl 2·6H 2 O）。 根据需要对盐水进行蒸发以产生相对于硫酸镁基本上过饱和的盐水。 蒸发在高温下进行，以避免氯化镁结晶。 然后将过饱和硫酸镁盐水保持在高温下，将氯化镁在溶液中保持足够长的时间，以允许硫酸镁以MgSO 4 / 5H 2 O结晶。 从所得硫酸盐晶体浆料中回收的澄清盐水在真空下和低温下，优选低于约90℃下以足够的速率进行蒸发，以产生低硫酸盐双曲砾石晶体作物。