公开(公告)号：US4169054A

公开(公告)日：1979-09-25

申请号：US943995

申请日：1978-09-20

申请人： Franco Cappello ,  Mario Mortigliengo ,  Erich Schmoll ,  Eduard Kratz

发明人： Franco Cappello ,  Mario Mortigliengo ,  Erich Schmoll ,  Eduard Kratz

IPC分类号： C01B17/88 ,  C01B17/90 ,  B01D1/00

CPC分类号： C01B17/90 ,  C01B17/88 ,  Y10S159/19

摘要： Concentrated sulphuric acid aqueous solutions, stably clear through the time, are obtained starting from diluted sulphuric acid aqueous solutions containing Mg and possibly other impurities such as Fe, Al, Cr, V and Mn, by evaporation concentration. The process is characterized in that, before filtering, the slurry obtained by evaporation concentration, is cooled down to 10.degree.-25.degree. C. and maintained at this temperature for not less than 12 hours.

摘要翻译： 通过蒸发浓缩从含有Mg和可能的其他杂质如Fe，Al，Cr，V和Mn的稀硫酸水溶液开始获得浓缩的硫酸水溶液，从而稳定地清除。 该方法的特征在于，在过滤之前，将通过蒸发浓缩获得的浆液冷却至10 -25℃，并在该温度下保持不少于12小时。