| abstract |
A process for extracting from the aqueous solution the alkali metal or ammonium salt of a phenol, naphthol, antrol or fenantrol or the corresponding thiol, which comprises contacting an aqueous, alkaline or neutral solution, of the alkali metal salt or ammonium in which a fluoride, chloride, bromide, hydroxide, nitrate, nitrite, sulfate, sulphite, sulfide, thiosulfate, phosphate, hydrogen phosphate, carbonate, bicarbonate, cyanate, cyanide, thiocyanate, borate, chlorate, chlorite is dissolved , hypochlorite, perchlorate, chromate, dichromate or permanganate of alkali metal or ammonium with a partially water-miscible organic solvent, in which 1 to 8 moles of solvent are used for each mole of the alkali metal or ammonium salt of the phenol, naphthol, antrol or fenantrol or the corresponding thiol, in order to transfer the aqueous solution of the alkali metal or ammonium salt of the phenol, naphthol, antrol or fenantrol or the corresponding thiol to the solvent, to the time that the separated aqueous and solvent phases are retained and, thereafter, separate the solvent phase containing the alkali metal or ammonium salt and water from the aqueous phase, the ratio of solvent to water being in the solvent phase separated from 0.5: 1 to 10: 1 p / p. |