FIELD: paper-and-pulp industry.
SUBSTANCE: invention relates to production of pulps used in binder-based articles. Method of invention comprises repetitive soaking and washing of unbleached pulp in water, which is maintained in alkaline state at elevated temperature to obtain cellulose product characterized by chemical oxygen demand not above 2.0 kg per 10 kg dry cellulose.
EFFECT: improved strength characteristics of products.
14 cl, 1 dwg, 2 ex
| Title | Year | Author | Number |
|---|---|---|---|
| UNBLEACHED PULP WITH VERY LOW CHEMICAL OXYGEN DEMAND | 2003 |
|
RU2272856C2 |
| SAWDUST-ORIGIN ALKALI CELLULOSE WITH LOW VALUES OF MEDIAN DEGREE OF POLYMERIZATION AND PROCESS OF PRODUCTION THEREOF | 2002 |
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RU2268327C2 |
| METHOD OF BLEACHED CELLULOSE PRODUCTION | 1993 |
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RU2046869C1 |
| METHOD FOR BLEACHING OF HIGH-CONSISTENCY LIGNOCELLULOSE MASS AND BLEACHED HIGH-CONSISTENCY LIGNOCELLULOSE MASS PRODUCED BY THIS METHOD | 1993 |
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RU2115780C1 |
| METHOD OF BLEACHED CELLULOSE PRODUCING | 1992 |
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RU2027812C1 |
| METHOD OF OXYGEN DELIGNIFICATION OF NONBLEACHED PULP | 1991 |
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| FIXATION OF OPTIC WHITENERS ON FIBRE | 2006 |
|
RU2386738C2 |
| METHOD OF PRODUCING BLEACHED PULP | 0 |
|
SU1498859A1 |
| METHOD OF PREPARING BLEACHED PULP AND A METHOD FOR DELIGNIFICATION AND BLEACHING OF LIGNOCELLULOSE MATERIAL | 1990 |
|
RU2102547C1 |
| ADVANCED SYSTEM AND METHOD OF RECYCLING FILTRATE OF CHEMI-THERMOMECHANICAL PULP | 2011 |
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RU2526013C2 |
