METHOD OF SEPARATING STABILISED AQUEOUS HYDROGEN PEROXIDE SOLUTIONS Russian patent published in 2013 - IPC C01B15/13 C01B15/26 

FIELD: chemistry.

SUBSTANCE: invention relates to the process of separating hydrogen peroxide from reaction mixtures obtained by oxidation of isopropyl alcohol, and can be used in chemical and textile industry as well as in medicine. A reaction mixture obtained after oxidation of isopropyl alcohol, which contains hydrogen peroxide, acetone, isopropyl alcohol, water, organic peroxides, acetic acid and phosphates, is mixed with sodium sodium metastannate in amount of 1-25 mg/l and subjected to vacuum rectification at absolute pressure of 23-36 kPa and bottom temperature of 76-84°C. 5-100 mg/l diethylene triamine pentamethylene phosphonic acid or salt thereof is added to the stream of aqueous hydrogen peroxide solution coming out of the column.

EFFECT: invention reduces loss of hydrogen peroxide during rectification, increases output thereof by 3-6%, especially when using, at the step for separating aqueous hydrogen peroxide solution, equipment made from stainless steel and high-efficiency nozzles characterised by a developed surface, and increases safety of the process and enables to obtain a stable hydrogen peroxide solution.

4 cl, 1 tbl, 12 ex