FIELD: chemistry.
SUBSTANCE: brown coal is crushed to -50+25 mm pieces, after which the crushed brown coal is subjected to pyrolysis to obtain carbonated coal. The carbonated coal is crushed to -2.5+0.5 mm pieces and subjected to heat treatment with steam to obtain activated carbonated coal. Treatment with dichloroethane is then carried out, followed by treatment with oleum at 70-90°C.
EFFECT: high activity of the sorbent with respect to mercury ions owing to higher degree of sulphonation.
5 cl, 6 tbl, 25 ex
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