METHOD FOR FILTRATION SEPARATION OF AN AQUEOUS EMULSION IN A LAYER OF GRANULES Russian patent published in 2022 - IPC B01D17/02 C02F1/40 B01D17/04 B01J20/32 

FIELD: water treatment.

SUBSTANCE: invention relates to methods for filtration separation of an aqueous emulsion, in particular to methods for water purification from petrol, oils and oil products, fats (of vegetable and animal origin) and other organic substances. In the proposed method for filtration separation of an aqueous emulsion in a layer of granules using coalescent capture of water-insoluble liquids, a liquid network consisting of a dispersed phase of a separable emulsion or a liquid mutually soluble with a dispersed phase is used as a coalescent catcher. In this case, the liquid network is formed in the gaps between the granules, the entire surface or most of the surface of which is non-wettable for the dispersed phase of the emulsion and the liquid from which the liquid network is formed, and the emulsion passes through the filter layer of the granules through the channels formed by the granules and the liquid network. The solution eliminates clogging of the filter due to contamination of the filter layer granules with heavy fractions of the dispersed phase, since the surface of the granules is (fully or partially) non-wettable for the dispersed phase. The filaments of the liquid network located between the granules reduce the size of the channels and divide the channels into smaller ones, and a decrease in the cross-section of the channels leads to an increase in the speed of the emulsion.

EFFECT: invention provides an increase in the reliability and efficiency of the process of filtration separation of an aqueous emulsion in a layer of granules by means of coalescent capture of water-insoluble liquids.

9 cl, 8 ex