| 低硫可膨胀石墨的制备 |
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| 引用本文： | 李冀辉,刘巧云,黎梅,刘占荣.低硫可膨胀石墨的制备[J].精细化工,2003,20(6):341-342. |
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| 作者姓名： | 李冀辉 刘巧云 黎梅 刘占荣 |
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| 作者单位： | 河北师范大学,化学学院,河北,石家庄,050091 |
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| 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%。
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| 关 键 词： | 低硫可膨胀石墨 混合氧化剂 |
| 文章编号： | 1003-5214(2003)06-0341-02 |
Preparation of Low-sulphur Expandable Graphite |
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| Abstract: | 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.H2SO4)∶m(H2O2)∶m(K2Cr2O7)=1∶14∶05∶012∶012,reaction time 1 h and reaction temperature 45 ℃.The expanded volume of graphite is 280 mL/g and the sulphur content w(S) is 011%. |
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| Keywords: | low-sulphur expandable graphite mixed oxidants |
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