METHOD OF PURIFICATION OF AQUEOUS SOLUTIONS FROM METHYLAMINE Russian patent published in 2023 - IPC C02F1/28 B01J20/20 B01J20/30 

FIELD: adsorption technology.

SUBSTANCE: invention can be used for water treatment of process effluents from enterprises in the chemical and pharmaceutical industries. A method of purification of aqueous solutions from methylamine by adsorption of active carbon includes treatment of active carbon for 24 hours with a solution of ammonium hydrogen phosphate with a concentration of 5% at a ratio of the mass of coal in grams to the volume of solution in cm³ 1:100, followed by heating at a temperature of 100°C for 2 hours in air.

EFFECT: increased sorption capacity of active carbons for caprolactam.

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