发明名称 |
СПОСОБ ОТБЕЛКИ ЦЕЛЛЮЛОЗЫ |
摘要 |
FIELD: pulp-and-paper industry, in particular method for PULP whitening. ^ SUBSTANCE: craft pulp mass with concentration of 2.5-5.0 % after oxygen-alkaline treatment is treated with potassium permanganate in consumption of 0.01-0.1 % based on dry cellulose at 40-80°C and pH 1.6-3.0 or with sulfuric acid solution in consumption of 1.0-1.5 % at 90°C for 30 min. In steps II and IV cellulose with concentration of 10 % is treated with hydrogen peroxide in consumption of 2 % based on mass of dry cellulose for 120 min at 80-90°C and pH 9.5-10.5 wherein consumption of sodium alkali and sodium silicate is 1.3 % and 2.5 %, respectively. In step III cellulose is treated with potassium permanganate in consumption of 0.01-0.4 % under step I conditions. ^ EFFECT: reduced consumption of whitening agents. ^ 1 tbl, 9 ex |
申请公布号 |
RU2004117246(A) |
申请公布日期 |
2005.11.20 |
申请号 |
RU20040117246 |
申请日期 |
2004.06.07 |
申请人 |
Федорова Эльвира Ильинична (RU);Никулина Людмила Алексеевна (RU);Смолева Людмила Леонидовна (RU) |
发明人 |
Федорова Эльвира Ильинична (RU);Никулина Людмила Алексеевна (RU);Смолева Людмила Леонидовна (RU) |
分类号 |
D21C9/10;D21C9/14;D21C9/16 |
主分类号 |
D21C9/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|