制备无硫可膨胀石墨的研究

无机材料学报, 1997, 12(2): 252-256.

制备无硫可膨胀石墨的研究

宋克敏 , 刘金鹏 , 靳通收 , 李国山

河北农业大学基础部

保定071001

河北轻化工学院化工系

保定 071002

河北教育学院化学系

石家庄050091

1.1Department of Basic Course

Hebei Agriculture University Baoding 071001 China

2. 2Hebei Institute of Chemical Technology and Light Industry Shijiazhuang 050018 China

3. 3Department of Chemistry Hebei University Baoding 07100, China

4. 4Department of Chemistry Hebei Education college Shijiazhuang 050091 China>

关键词：无硫可膨胀石墨 , preparation , acetic anhydride , 65% nitric acid

Preparation of Sulfur-Free and Expandeble Graphite

SONG Kemmin , LIU Jinpeng , JIN tongshou , LI Quoshan

Keywords： sulfur-free and expandable graphite , 制备 , 65％硝酸 , 乙酸酐

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．

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, flexble graphite does not contain nitrogen. To date, similar report has not been seen in the literature.

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