FIELD: pulp and paper industry.
SUBSTANCE: mixed pulp for production of pulp derivatives. A mixed slurry is proposed that contains water, lignin, an inorganic salt, and a copolymer comprising two or more structural units selected from ethylene oxide units, propylene oxide units, (meth)acrylic acid units, ethyl acrylate units and combinations thereof, while the copolymer is free from silicon-containing structural units, and lignin is contained in an amount of more than about 150 ppm in terms of the total weight of the mixed pulp, and a method for improving the flow of water during washing of the pulp, which consists in obtaining the proposed pulp, obtaining a layer of pulp from it, after which there is a runoff water from the pulp layer.
EFFECT: increase in the rate of water runoff during pulp washing.
10 cl, 11 dwg, 7 ex
