摘要
以木屑为原料,磷酸为活化剂,使用捏合机对木屑磷酸混合料进行预处理,制得了脱色用颗粒活性炭.其性能指标为:亚甲基蓝吸附值155～170 mL/g,A法焦糖脱色率100%以上,灰分4%以下,强度95%以上.其孔分布以中孔为主,达到了50%～65%.可用于发酵液等食品和制药行业的脱色精制.研究还着重讨论了制备过程中活性炭的成型机理,认为机械捏合和热处理是提高该颗粒活性炭强度的关键.
Granular activated carbon for decolorization of liquid was made from sawdust by activation with H_3PO_4. The properties of the prepared product were as follows:methylene blue 155-170 mL/g; decolorization of caramel A ≥ 100 %; ash ≤4 %; abrasive resistance ≥ 95 %; and the rate of mesopore 50 %-65 %. Moreover, the modeling mechanism during the preparing process was emphatically discussed to reach the following conclusion: the key point for improving abrasive resistance of granular activated carbon is to chose the suitable conditions of kneading and heat treatment. The product can be applied to the decolorization and refining of fermentation liquid in food and medicine industries.
出处
《林产化学与工业》
EI
CAS
CSCD
2005年第2期39-42,共4页
Chemistry and Industry of Forest Products
关键词
木屑
颗粒活性炭
液体脱色
sawdust
granular activated carbon
decolorization of liquid
