FAS-Pulp Bleaching Agent
Pulp bleaching agents advanted and excellent pulp and paper bleaching agent, excellent heat stability, nonpoison, tasteless, easy operation, efficience, transportation and storage convenient etc. Widely used in in dyeing, paper making and other industries as kinds of reduction agent, bleach, decolorizer, plastic stabilizer, antioxygen of organic synthesis and sensitiet of sensitiet. Because of the high reducibility and excellent stability, it is quite suitable for high temperature continual bleaching.FAS also stable in air and can be used under the normal equipments and good for environment, without increasing the water pollution load, conforms to the requirement of environmental protection.
Technical Data：
Appearance: White crystalline powder
Purity: 99.0% min
Moisture: 0.05% max
Iron(Fe): 10ppm max
PH value: 5-6
Formula: (NH2)2CSO2，CH4N2SO2
CAS No.: 1758-73-2 or 4189-44-0
UN No.3341
Hazard Class: 4.2
Packing Group: II/Ⅲ
Main application:
There is a excellent effect in reduction bleaching and paper deink bleaching in paper making industry.
The Method used in Pulp and Paper Mills:
FAS powder should be dissolved in solution and filled into pulp under alkaline conditions.
Temperature 60℃ min, pH10～11, the optimal dosage rate for FAS to caustic should be 2:1, retention time 30～50 minutes, bleaching equipment should be sealed.The optimal FAS dosage depends on nature of pulp, generally it is between 3~6 kg based on per ton of absolute dry pulp (0.3%~0.6%).
TMP:Generally single stage bleaching is employed，brightness gain exceeds 6%。
DIP:Generally employs two stages bleaching, (H2O2～FAS or FAS～H2O2). Mostly employs H2O2～FAS, brightness improved by 6% min. followed by peroxide bleaching.
Packing:
500kg or 1000kg jumbo bags.
50kg fiber drums.
25kg or 50kg woven bags.
25kg kraft compound plastic bags
