发明名称 |
PROCESS FOR REMOVING HEAVY METAL IONS AND ARSENIC FROM WET-PROCESSED PHOSPHORIC ACID |
摘要 |
The disclosure relates to a process for removing heavy metal ions and arsenic from wet-processed phosphoric acid, wherein the crude wet-processed phosphoric acid is treated at temperatures between 10 DEG and 100 DEG C. initially with a diorganyldithiosphosphoric acid ester and then with an adsorbent, and the phoshoric acid so purified is separated from the ester and adsorbent. More particularly, the wet-processed phosphoric acid is treated with the diorganyldithiophosphoric acid ester at temperatures higher than 50 DEG C. and with the adsorbent at temperatures lower than 50 DEG C. |
申请公布号 |
ZA8305264(B) |
申请公布日期 |
1984.04.25 |
申请号 |
ZA19830005264 |
申请日期 |
1983.07.20 |
申请人 |
HOECHST AG |
发明人 |
SCHIMMEL GUENTHER;GRADL REINHARD;HEYMER GERO |
分类号 |
C01B25/237;C01B25/238;C01G1/00;C01G3/00;C01G11/00;C01G13/00;C01G21/00;C01G28/00;C22B3/38 |
主分类号 |
C01B25/237 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|