FIELD: textile fabrics.
SUBSTANCE: raw hemp is boiled. Boiling is carried out with addition of anthraquinone in amount of not more than 0.1% from raw material weight. Produced cellulose is bleached with oxygen and/or ozone. Alkaline boiling liquid is processed with the help of semi-permeable membranes of reverse or direct osmosis. Regenerated boiling liquid is returned to boiling stage in boiling vessel. At that temperature of boiling is maintained in interval of 125-145°C.
EFFECT: increased quality of cellulose products and improved economic and ecological parametres of cellulose production process.
2 tbl, 3 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR PRODUCING BLEACHED CELLULOSE FROM BAST FIBRES | 2023 |
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RU2807323C1 |
| METHOD FOR PRODUCING CELLULOSE | 2013 |
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| METHOD OF PREPARING PULP FROM CORN STEMS | 2000 |
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RU2249636C2 |
| METHOD OF OBTAINING CELLULOSE FROM LIGNOCELLULOSE-CONTAINING BIOMASS | 2010 |
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RU2534067C2 |
| METHOD OF PREPARING BLEACHED PULP AND A METHOD FOR DELIGNIFICATION AND BLEACHING OF LIGNOCELLULOSE MATERIAL | 1990 |
|
RU2102547C1 |
| PULP PREPARATION METHOD | 1997 |
|
RU2135665C1 |
| METHOD FOR COMPENSATING SODIUM LOSS AT PULP MILL, METHOD AND SYSTEM FOR PRODUCING BLEACHED PULP | 2020 |
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| METHOD OF PRODUCING SOLUBLE PULP, VISCOSE FIBRE AND LYOCELL FIBRE | 2007 |
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RU2439231C2 |
