| 摘要 |
<p>An object of the invention consists in providing a processing method for preparing tri(hexafluoroisopropyl) phosphate in a large scale, which is safe, low-cost, and high-yield. In order to achieve the above inventive object, the invention provides a method for preparing tri(hexafluoroisopropyl)phosphate, comprising the following steps: in an inert gas atmosphere, mixing hexafluoroisopropanol and methyl tertiary butyl ether; in the inert gas atmosphere, adding a metal hydride into the mixture of hexafluoroisopropanol and methyl tertiary butyl ether for a reaction, to obtain a first reaction solution; in the inert gas atmosphere, adding phosphorus oxychloride into the first reaction solution for a reaction by heating and refluxing, to obtain a second reaction solution; filtering the second reaction solution so as to obtain a filtrate; fractionating the filtrate at normal pressure and collecting fractions at a temperature of 78°C-88°C; cooling and crystallising the fractions collected in the range of 78°C-88°C; separating the crystals from the mother liquor, to obtain the crystals; heating the crystals to obtain a molten liquid and collecting products satisfying the preset requirement of purity.</p> |
