abstract |
METHOD FOR PURIFICATION OF IMPURITIES TRIGEKSILFOSFATA DIGEKSSH1- ACIDS AND MONOGEKSILFOSFORNYH by treatment with an alkaline agent in an aqueous medium, followed by extraction of impurities, characterized in that, in order to increase the degree of purification, trigeksilfosfat, pre-dissolved in hexane, treated with an alkaline agent in the presence of dimethylformamide, extraction is carried t dimethylformamide containing 15 to 25 obes 7s of water, followed by the removal of thin hexane and the process is carried out at room temperature. cl |