公开(公告)号：US4569677A

公开(公告)日：1986-02-11

申请号：US583039

申请日：1984-02-23

申请人： Gijsbertus H. M. Calis ,  Matheus H. G. Jennekens

发明人： Gijsbertus H. M. Calis ,  Matheus H. G. Jennekens

IPC分类号： C01B25/22 ,  C01F11/44 ,  B01D9/02

CPC分类号： C01F11/44

摘要： Separating Ca(NO.sub.3).sub.2.4H.sub.2 O from a nitrophosphate digestion liquor by crystallization, wherein Ca(NO.sub.3).sub.2.4H.sub.2 O seeding material with a particle size smaller than 100 .mu.m is added to this liquor at a temperature of 0.degree.,1.degree.-2.degree. C. lower than the saturation temperature, the resulting liquor is batchwise cooled, and the Ca(NO.sub.3).sub.2.4H.sub.2 O crystallized out is separated from the cooled liquor.The Ca(NO.sub.3 ).sub.2.4H.sub.2 O is substantially crystallized out without excessive cooling as very coarse and uniform particles which can be easily separated out.

摘要翻译： 通过结晶从硝酸磷酸盐消解液中分离出Ca（NO 3）2·4H 2 O，其中在0℃，1℃-2℃的温度下向其中加入粒径小于100微米的Ca（NO 3）2·4H 2 O种子材料 C.低于饱和温度，将所得液体分批冷却，结晶出的Ca（NO 3）2·4H 2 O与冷却液分离。 Ca（NO 3）2·4H 2 O基本上结晶出来，而不会过度冷却，因为非常粗糙和均匀的颗粒可以容易地分离出来。