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1、高纯石墨的制备研究王磊摘要为了改进传统的高纯石墨生产方法，找到高效环保的生产工艺，采用密闭微波消解技术对右墨进行了捉纯。系统地研究了石墨样品的预处理、消解液的配比、消解压力、微波消解时间和微波消解功率对提纯效果的影响。通过轮换实验得出了以下结论：随着HCI/HNO3比值和微波消解功率的增加产品固定碳含量先增大后减小；产品同定碳含量随着右墨原料微波预处理时间、微波消解压力和微波消解时间的增加而增加。同等反应条件下，石墨原料经微波预处理5min,取出骤冷，产品固定碳含量更高。密闭微波消解捉纯石墨的最佳实验条件：原料经过微波预处理5min后骤冷，消解液选用HC1:HNO3=
2、2:2,消解功率800W,消解压力2.0Mpa,消解时间30mino制得了固定碳含量为99.449%的石墨产品。关键词高纯石墨，微波，提纯ABSTRACTInordertoimprovethetraditionalmethodsofproductionofhigh-puritygraphiteandfindenvironmentallyfriendlyandefficientproductionprocesses,theclosedmicrowavedigestiontechniquehadbeenusedinpurificationofgraphite.Theinf
3、luencefactorofpuritysuchasthepretreatmentofgraphitesamples,theratioofliquiddigestion,digestionpressure,digestiontimeandmicrowavepowerhavebeensystematicallystudied.Theresultofexperimentobtainedbyrotationexperimentshowedthat:withtheincreaseoftheratioofHCI/HNO3andmicrowavedigestionpower,th
4、econtentofcarbonintheproductincreasedfirstandthendecreased;withtheincreaseofthepretreatmenttime,digestiontimeanddigestionpressure,thecontentofcarbonincreased;inthesamereactionconditions,thecontentofcarbonismorehigherasthegraphitematerialsisdealtwithbymicrowavepretreatmentfor5min,suddenc
5、oldandthen.Thebestexperimentalconditionsofclosedmicrowavedigestionpurificationofgraphiteareasfollowed:afteramicrowavepre-treatmentofrawmaterialsafterthefirst5min,suddencold，digestionsolutionselectedHC1:HNO3=2:2,digestionpower800W,digestionpressure2.0Mpa,digestiontime30min.Thecontentofca
6、rbonintheproductatthebestconditionsis99.449%.KeywordsHigh-puritygraphite,microwave,purificationin摘要.........................................................................................................................................IABSTRACT..........................................
7、.................................................................................ill目录.........................................................................................................................................11绪论...................................................
