发明名称 |
FOERFARANDE FOER AVLAEGSNANDE AV TUNGMETALL-JONER UR VAOTFOERFARANDEFOSFORSYRA |
摘要 |
The disclosure relates to process for removing heavy metal ions, especially cadmium, copper, lead and mercury ions from wet-processed phosphoric acid. To this end, the crude acid is contacted with a mixture consisting of an adsorbent and a diorganyldithiophosphoric acid ester or, after treatment with the ester, the acid is contacted with the adsorbent alone, and the purified phosphoric acid is ultimately separated from the ester and adsorbent. |
申请公布号 |
FI830270(L) |
申请公布日期 |
1983.07.29 |
申请号 |
FI19830000270 |
申请日期 |
1983.01.26 |
申请人 |
HOECHST AKTIENGESELLSCHAFT |
发明人 |
GRADL, REINHARD;SCHIMMEL, GUENTHER;KRAUSE, WERNER;HEYMER, GERO |
分类号 |
C01B25/238;B01D11/04;C01B25/237;C01B25/46;C01G1/00 |
主分类号 |
C01B25/238 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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