FIELD: paper industry. SUBSTANCE: pulp has fibrous material, glueing substance, alumina and precipitating agent. Precipitating agent: a mixture of poly-1,2-dimethyl-5-vinylpyridinium methylsulfate with polyacrylamide, or product of copolymerization of 1,2-dimethyl-5-vinylpyridinium methylsulfate with acrylamide, or product of polymerization of 1,2-dimethyl-5-vinylpyridinium methylsulfate obtained in the presence of β-hydroxypropyl-tert.-butylperoxide or in the presence of latter and a-amino-g-methylbutyric acid in the form of mixture of D,L-isomers at concentration 0.01-0.07 wt.-% Paper mass can contain additionally filler. Pulp is used for paper and cardboard production. EFFECT: improved method of pulp production. 2 cl, 1 tbl
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Authors
Dates
1995-08-20—Published
1992-07-10—Filed