【摘要】 用高锰酸钾和浓硫酸作混合氧化剂 ,三氯化铁作插入剂 ,采用半固相浸渍法制备低硫可膨胀石墨 ,再将其用蔗糖硼酸酯溶液浸渍 ,高温膨胀后压制成低硫高抗氧化石墨制品的新工艺。其最佳工艺条件为石墨∶浓硫酸∶高锰酸钾∶三氯化铁的质量比为 1∶3 0∶0 8∶0 2 ,反应温度为 50℃ ,反应时间 6 0min ,蔗糖硼酸酯溶液浓度为 3% ,烘干温度低于 6 0℃ ,膨胀温度为 950℃ ,制品压制压力为 10MPa。制品的硫含量低于 50 0ppm ,抗氧化能力增强一倍。更多还原

【Abstract】 The new technology of preparing low sulfur antioxidized expandable graphite was presented in this paper.First the low sulfur expandable graphite was prepared by half solid phase maceration and potassium permanganate and concentrated vitriol is adopted as antioxidance,ferricfrichlorides as inserting,then macerated in canesugar borate,after it in high temperature,it was made low sulfur antioxidized graphite board.The best process condition are presented bellow,the weight ratio of graphite to vitriol,potassium permanganate and ferric trichloride is 1.0 to 3.0 to 0.8 to 0.2.The reaction temperature and time are 50℃ and 60 minute respectively.Macerating the low sulfur graphite by 3% canesugar Borate,drying it in Low temperature,expanding it in 950℃,making it pressboard in the pressure of 10MPa.By determining,the sulfur content of the production is lower than 500ppm,the ability of the antioxidization is one times more than before.更多还原