| 摘要 |
The invention relates to a process for purifying a phosphoric acid solution, comprising a step of filtration of the phosphoric acid using a nanofiltration membrane, in which the nanofiltration membrane is an organic nanofiltration membrane on which is absorbed at least one water-soluble polymer comprising at least one amine function, one aromatic amine function, one acid function and/or one alcohol function. The invention also relates to a process for manufacturing said membrane, comprising a step of absorption, on an organic nanofiltration membrane, of at least one water-soluble polymer comprising at least one amine function, one aromatic amine function, one acid function and/or one alcohol function. |
