【摘要】 用硝酸（65％）和乙酸酐混合液、高锰酸钾和天然鳞片石墨反应制备无硫可膨胀石墨，最佳反应条件是：石墨、乙酸酐、硝酸、高锰酸钾的重量比为1：0．8：0．5：0．07，反应时间为40min，反应温度为30℃，可膨胀石墨的膨胀容积为280mL／g；不含硫，含氮量为1．27％，其终端产品柔性石墨不含氮．迄今为止，未见文献报道．更多还原

【Abstract】 This paper studied a new method for preparing no-sulfur content and expandable graphite bypotassium permanganate as oxidant and a mixture of acetic anhydride and 65% nitric acid as medium. Theoptimum conditions for preparing the expandable graphite are as follows. Weight ratio of graphite: aceticanhydride: 65% nitric acid: potassium permanganate is 1.0:0.8:0.5:0.07; reacting temperature, 30℃;reacting time, 40min. The expanded volume and nitrogen content of the expandable grwphite are 280m/gand 1.27% respectively. The end product, flexible graphite does not contain nitrogen. To date, similarreport has not been seen in the literature.更多还原