低硫可膨胀石墨的制备  

Preparation of Low-sulphur Expandable Graphite

作　　者：李冀辉[1] 刘巧云[1] 黎梅[1] 刘占荣[1] 

机构地区：[1]河北师范大学化学学院,河北石家庄050091

出　　处：《精细化工》2003年第6期341-342,共2页Fine Chemicals

摘　　要：采用乙酸酐为插入剂,H2O2和K2Cr2O7为氧化剂制备低硫可膨胀石墨。最佳实验条件:m(石墨)∶m(乙酸酐)∶m(浓硫酸)∶m(H2O2)∶m(K2Cr2O7)=1∶1 4∶0 5∶0 12∶0 12;反应时间为1h;反应温度为45℃。制备出的可膨胀石墨膨胀后体积达到280mL/g,含硫量w(S)=0 11%。Lowsulphur expandable graphite was prepared using acetic anhydride as inserting agent and hydrogen peroxide and potassium dichromate as mixed oxidants.The best process conditions are as follows:m(graphite)∶m(acetic anhydride)∶m(conc.H2SO4)∶m(H2O2)∶m(K2Cr2O7)=1∶14∶05∶012∶012,reaction time 1 h and reaction temperature 45 ℃.The expanded volume of graphite is 280 mL/g and the sulphur content w(S) is 011%.

关 键 词：低硫可膨胀石墨 制备 混合氧化剂 乙酸酐 插入剂 

分 类 号：TQ165[化学工程—高温制品工业]