| abstract |
PCT No. PCT/BE96/00066 Sec. 371 Date Feb. 5, 1998 Sec. 102(e) Date Feb. 5, 1998 PCT Filed Jun. 21, 1996 PCT Pub. No. WO97/00714 PCT Pub. Date Jan. 9, 1997Method of purification by extraction of at least one substance to be isolated from a liquid medium, comprising an addition to the latter of an organic compound, entrainable by a vapor, which has a molecule with an acidic-basic character in the Lewis sense due to at least one atom of N, O and/or S forming one or more active sites provided with a free electron pair, this pair or these pairs being in resonance with at least one other pair carried by the molecule, this addition being carried out in a quantity sufficient to give rise to a product of an equilibrium reaction between the organic compound and the said at least one substance to be isolated, and sufficient to cause a precipitation of this equilibrium reaction product, a filtration of the precipitate and an entrainment by vapor of the organic compound from the precipitate, with a yield of the substance to be isolated in purified form. |