FIELD: pulp-and-paper industry, in particular, production of cellulose from cellulose semi-finished products.
SUBSTANCE: method involves cooking ground larch wood in mixture having 37 wt% of hydrogen peroxide and 30 wt% of acetic acid used in mole ratio of 0.3-0.5 in the presence of molybdic acid catalyst used in an amount of 0.5-0.7% by weight of perfectly dry wood; providing cooking at liquor ratio of 7.5:1 - 10:1 and at temperature of 110-140°C for 2-3 hours.
EFFECT: improved quality of cellulose semi-finished product, reduced consumption of reactants and catalyst, wider range of available raw materials owing to utilization of larch wood, and manufacture of cellulose semi-finished product without preliminarily providing of arabinogalactane extraction stage.
3 tbl, 22 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PREPARING CELLULOSE HALF-FINISHED PRODUCT | 2001 |
|
RU2181807C1 |
| METHOD OF CELLULOSE SEMI-FINISHED PRODUCT PRODUCTION | 2003 |
|
RU2217537C1 |
| METHOD OF PREPARING CELLULOSE INTERMEDIATE | 1999 |
|
RU2150538C1 |
| METHOD FOR PRODUCING MICROCRYSTALLINE CELLULOSE | 2002 |
|
RU2203995C1 |
| METHOD OF CELLULOSE OBTAINING | 2013 |
|
RU2547689C1 |
| METHOD FOR PRODUCING OF FINE-GRAIN CELLULOSE FROM CEREALS STRAW | 2006 |
|
RU2312110C1 |
| CELLULOSE PRODUCTION PROCESS | 2002 |
|
RU2212483C1 |
| METHOD OF PRODUCTION OF CELLULOSE | 2012 |
|
RU2490384C1 |
| METHOD OF COMPLEX PROCESSING OF BIRCH WOOD | 2016 |
|
RU2620551C1 |
| METHOD OF PRODUCING CELLULOSE | 2015 |
|
RU2590882C1 |
