FIELD: chemistry.
SUBSTANCE: invention relates to the production of carboxylated fibre. The method includes catalytic carboxylation of cellulose fibres in at least two stages of catalytic carboxylation, located successively, in which the primary catalyst, the secondary oxidating agent, and, if necessary, an agent for pH regulation are added in the beginning of each stage.
EFFECT: invention makes it possible to increase a level of carboxylation with effective expenditures.
11 cl, 1 dwg, 8 tbl, 5 ex
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