A reactive dye(C.I.Reactive Red 279)was desalted by separation membranes and ion exchange resins.The removal rate of salt of the process was 99.76%;wastewater reduced 40.95%compared to the membrane-alone method,and a total dye loss de-creased from 7.50%to 3.12%.A 30%salt-free reactive dye paste(solution)was obtained which could be used to prepare high-quality digital textile inkjet printing ink.
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