METHOD AND APPARATUS FOR PRODUCING ELECTROLYSIS PRODUCTS FROM A SOLUTION OF CHLORIDES OF ALKALI METALS Russian patent published in 2025 - IPC C25B1/46 

FIELD: chemistry.

SUBSTANCE: invention relates to chemical engineering, particularly to methods and devices for electrolysis of water and diluted aqueous solutions of alkali metal chlorides. Method of producing electrolysis products from a solution of chlorides of alkali metals involves using a flow diaphragm electrochemical reactor, electrodes of which are divided by a fine-pore diaphragm into anode and cathode chambers, into which an aqueous solution of an alkali metal chloride with concentration in range from 0.2 to 1.0 g/l is fed in a volume ratio of 2.6 to 3.6, respectively. Catholyte is then purified in a flotation reactor by means of hydrogen bubbles contained in the flow of the catholyte and mixed with the entire volume of the obtained anolyte in a flow mixer. Obtained mixture is fed into a vessel with the initial solution for further correction of the solution parameters by repeating the cycle until the finished product is obtained, or into the line for accumulation of the ready product, and the catholyte with flotation sludge is passed through a filter and the filtrate is directed into the accumulation vessel.

EFFECT: obtaining an anolyte with a given total mineralization in range from 0_2 to 0_9 g/l at a given concentration of oxidants in range from 20 to 80 % of the total mineralization of the fresh initial solution of an alkali metal chloride and pH in range of 5_5-6_5, as well as the possibility of controlling pH and redox potential of the obtained anolyte.

4 cl, 1 dwg, 4 ex