发明名称 |
SETT VID RENING AV FOSFORSYRA |
摘要 |
Phosphoric acid is purified. To this end, it is dissolved in an organic solvent completely miscible with water. More particularly, the phosphoric acid is mixed with a solvent having a boiling point higher than that of water or higher than that of the resulting azeotrope; the resulting solution is heated to temperatures between the boiling point of water or the azeotrope and that of the solvent for as long a period as necessary to distillatively free the solution from the bulk of uncombined water therein; and the phosphoric acid solution is separated from residue. |
申请公布号 |
SE410587(B) |
申请公布日期 |
1979.10.22 |
申请号 |
SE19750007663 |
申请日期 |
1975.07.03 |
申请人 |
* HOECHST AG |
发明人 |
B * WOJTECH;K-P * EHLERS;W * SCHEIBITZ |
分类号 |
C01B25/234;C01B25/18;C01B25/46;(IPC1-7):01B25/46 |
主分类号 |
C01B25/234 |
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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