三元系混酸插层制备细鳞片膨胀石墨  

Preparation of Fine Flake Expanded Graphite by Intercalating Agents of Ternary Mixed Acid

作　　者：赖奇[1] 李玉峰[1] 

机构地区：[1]攀枝花学院石墨深加工省级高校重点实验室,四川攀枝花617000

出　　处：《非金属矿》2008年第4期32-33,共2页Non-Metallic Mines

基　　金：四川省应用基础研究项目(2006J13-014)

摘　　要：以细鳞片石墨及硫酸、硝酸、磷酸及高锰酸钾的适当配比,采用化学法经氧化酸化插层、水洗、干燥、高温膨胀过程制备得到膨胀石墨,通过对比实验获得了膨胀倍数为230ml/g的低硫细鳞片膨胀石墨。其最佳工艺条件为:硫酸∶硝酸∶磷酸=1∶1∶3,KMnO4用量为石墨质量的15%,反应温度25℃、反应时间为100min、膨胀温度1000℃。Exfoliated graphite （EG） is prepared by using natural flaky graphite with sulfuric acid, nitric acid.phosphorylation and potassium permanganate as oxidant through washing, drying and expanding at high temperature, the conditions for preparing the expanded graphite were optimized by an orthogonal test method and factors affecting expanded volume were obtained： natural graphite ： potassium permanganate ： nitric acid ： hosphorylation ： potassium permanganate= 1 ： 1 ： 3, Potassium permanganate with 15%（by weight）. 25℃. 100 minutes. The largest expanding volume was 230ml/g.

关 键 词：细鳞片石墨 制备 三元系混酸 含硫量 

分 类 号：TQ165[化学工程—高温制品工业]