发明名称 |
METHOD OF SEPARATING HEAVY METAL COMPOUNDS FROM INTERMEDIATE PRODUCTS OF PHOSPHATIC FERTILIZER MANUFACTURE |
摘要 |
<p>A process for the separation of heavy metal components, especially of compounds of cadmium, mercury and lead, from crude phosphoric acid obtained according to the Odda process, which comprises adjusting this crude phosphoric acid with ammonia to a pH of from 0.5 to 1.5, contacting it subsequently with a diorganyl-dithiophosphorus compound and an adsorbent, and then separating the acid from the absorbent containing the heavy metal impurities.</p> |
申请公布号 |
EP0091043(B1) |
申请公布日期 |
1985.05.02 |
申请号 |
EP19830103017 |
申请日期 |
1983.03.26 |
申请人 |
HOECHST AKTIENGESELLSCHAFT |
发明人 |
VON PLESSEN, HELMOLD, DR.;GRADL, REINHARD, DR.;SCHIMMEL, GUNTHER, DR. |
分类号 |
C01B25/238;C01G11/00;C01G13/00;C01G21/00;C05B1/00;(IPC1-7):C01B25/238;C22B3/00 |
主分类号 |
C01B25/238 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|