【摘要】 首次用硝酸（６５％）、乙酸酐和硫酸（９８％）的。混合液与天然鳞片石墨反应制备低硫高倍膨胀石墨。通过正交实验和分析，筛选出最佳制备条件：石墨、硝酸（６５％）、乙酸酐（９７％）、硫酸（９８％）的重量比为１：１．４：１．５：１．５，反应时间为 ３０ｍｉｎ，反应温度为 ２５℃。膨胀石墨的舍硫量６００ｐｐｍ，膨胀倍数在１９０以上。更多还原

【Abstract】 Low-sulphur and high-times expanded graphite was prepared at the first-time by reacting natural flake graphite with mixing solution made from nitric acid (65%), acetic anhydride(97%) and sulfuric acid(98%). The optimum conditions for the preparation were screened out after the orthogonal tests and analyses. Weight ratio of graphite : 65% nirtric acid: 97% acetic anhydride: 98% sulfuric acid is 1: 1.4; 1.5; 1.5;reacting the, 30 min; leacting temperature, 25℃. The sulphue content and expanding times of the final product are 600 ppm and over 190 respectively.更多还原