FIELD: chemical technology, sorbents.
SUBSTANCE: method for preparing sorbents involves treatment of buckwheat husk in extracting solution of ammonium oxalate or mineral acid in the concentration 0.1-0.5 N at temperature 60-90°C and the following filtering a solid phase, washing out and drying. Hydrochloric, sulfuric or nitric acid is used as a mineral acid mainly, and treatment is carried out in the ratio solid phase : liquid = 1:(8-15). Invention provides complex using the raw and increasing yield of sorbent.
EFFECT: improved preparing method.
2 cl, 7 tbl, 6 ex
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