FIELD: chemistry.
SUBSTANCE: method includes crushing and fractioning of initial material, delignification of initial raw material by alkaline hydration and alkaline pulping with further washings. After that, two-stage acidic hydrolysis with intermediate neutralisation and three washings is performed. Then, three-stage bleaching with hydrogen peroxide H2O2 with three washings is carried out. In second washing finely dispersed ozone is supplied. Obtained product is additionally subjected to homogenisation and drying. Invention makes it possible to obtain final product with virtually absolute absence of lignin, with high organoleptic and physical and chemical properties from lignin-containing initial material.
EFFECT: method does not require application of expensive equipment, does not involve application of highly toxic reagents, includes simple technological operations, is characterised by production scalability.
3 cl, 3 dwg, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF OBTAINING NANOCRYSTALLINE CELLULOSE FROM BAGASSE | 2014 |
|
RU2556143C1 |
| METHOD OF PRODUCING NANOCRYSTALLINE HIGH-PURITY CELLULOSE | 2013 |
|
RU2550397C1 |
| METHOD FOR OBTAINING NANO-CELLULOSE | 2012 |
|
RU2505545C1 |
| METHOD OF PRODUCING MICROCELLULOSE | 2012 |
|
RU2501810C1 |
| METHOD FOR PRODUCTION OF MICROFIBRILLARY PECTIN-CONTAINING CELLULOSE FIBRES | 2011 |
|
RU2501325C2 |
| METHOD OF OBTAINING MICROCRYSTALLINE CELLULOSE FOR CARDBOARD PRODUCTION | 2014 |
|
RU2542562C1 |
| METHOD FOR PRODUCTION OF BLEACHED INULINE-CONTAINING VEGETAL FOOD FIBRES FROM RAW GIRASOL | 2014 |
|
RU2565266C1 |
| METHOD TO PRODUCE CELLULOSE | 2010 |
|
RU2413808C1 |
| APPLE REFUSES BLEACHING METHOD | 2014 |
|
RU2556145C1 |
| METHOD FOR PRODUCTION OF CELLULOSE VEGETAL FIBRES FOR USAGE AS NEUTRAL INERT FILLER IN COMPOSITION OF PELLETY MIXTURE FOR PREPLANT SEED TREATMENT AS ALTERNATIVE OF WOOD SAW DUST OF SOLID AND SOFT WOOD | 2014 |
|
RU2589220C2 |
