METHOD OF OBTAINING A SORBENT TO EXTRACT HEAVY METALS FROM WASTEWATER Russian patent published in 2017 - IPC B01J20/18 B01J20/32 

FIELD: chemistry.

SUBSTANCE: way of getting the sorbent is achieved through modification of natural zeolite of clinoptilolite type. Spend getting a solution in a mixture of burnt lime sulphur-monoethanolamine with molar ratio of burnt lime: monoethanolamine = 10:1, sulfur: monoethanolamine = 6:1 at a temperature of 60-65°C. Pouring the zeolite into the received solution at a temperature of 20-25°C at a mass ratio of zeolite: sera = 5:1. The resulting mixture is treated with 1,2,3-trichloropropane at a molar ratio of 1,2,3-trichloropropane:sulfur=1:3 at a temperature of 20-25°C. The filtration, washing and drying of the desired product are then carried out.

EFFECT: obtaining a sorbent with a high sorption capacity.

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