【摘要】 以重铬酸钾作氧化剂制备低硫可膨胀石墨。制备的最佳条件是：石墨：乙酸酐：重铬酸钾：硫酸（98％）为1：1．0：0．08：0．3（重量比），反应温度25℃，反应时间50分，该方法具有氧化剂用量少，反应时间短，硫含量低（0．1％），膨胀容积大（260ml／g）等优点，并用仪器对产品进行了测试，目前未见其它文献做过此类报道．更多还原

【Abstract】 The preparating a low sulphur content expansible graphite with potassium cichromate as oxidant. The best conditions of preparation are : graphite. acetic, anhydride.potassium bichromat, sulphuric acid (98%) = 1: 1. 0: 0. 08: 0. 3 (wt % ratio), reaction teperature at 25℃. reaction time 50 min. There are the advantages in this method: forexample f a small amount of oxidants using, Short reaction time. low sulphur content (0.1 %) and bigger expanded vo1ume (260ml/g) etc.. The products were determined by instruments. We have not seen that the other documents reported lise it.更多还原