METHOD FOR DEEP ACID REGENERATION OF CERAMIC FILTER ELEMENT AND COMPOSITION FOR ITS IMPLEMENTATION, CONTAINING HEDP ACID Russian patent published in 2024 - IPC B01D33/44 B01D33/21 

FIELD: separation.

SUBSTANCE: group of inventions relates to filters intended for separation of liquid and solid phases of suspension using ceramic filter elements, and can be used in ore dressing processes. In the process of the ceramic filter element regeneration method, an aqueous solution of oxalic acid and oxyethylidene diphosphonic acid (HEDP) is introduced into the pores of the working walls of the ceramic filter element. Ratio of weight of oxalic acid and weight of HEDP acid when taking the total weight of said components as 100% is from 40:60% to 60:40%, and the ratio of the total weight of oxalic acid and HEDP acid to the weight of water when the weight of the aqueous solution of oxalic acid and HEDP acid is taken as 100% ranges from 1:99% to 20:80%. Also disclosed is a composition for realizing a method of regenerating a ceramic filter element.

EFFECT: group of inventions increases water permeability of working walls of the ceramic filtering element during its regeneration and increases service life of the ceramic filtering element.

6 cl, 6 dwg, 1 tbl