METHOD OF PURIFYING ACETIC ACID Russian patent published in 2012 - IPC C07C53/08 C07C51/44 C07C51/48 

FIELD: chemistry.

SUBSTANCE: invention relates to an improved method of purifying acetic acid, which can be used in microelectronics, liquid chromatography, in chemical, food and medical industry. The purification method involves treating the initial acetic acid with a chemical reagent, rectification purification of the pre-treated acetic acid, where the chemical reagent used at the pre-treatment step is hydrogen peroxide with volume ratio of acetic acid to hydrogen peroxide equal to 180-220:1, where treatment is carried out while stirring at a rate of 40-80 rpm at temperature 0-20°C, and the periodic rectification step is carried out in a column filled with filtered inert gas, with reflux ratio of 20-10 with collection of the solvent stripper and 8-5 with collection of the product, at pressure 200-700 mmHg, and temperature at the bottom of the column equal to 90-120°C and 80-118°C at the head of the column.

EFFECT: obtaining a product containing 99,96-99,99 wt % basic substance and suspended particles on the level of 80-200 per cm³.

5 cl, 2 ex