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1、高純石墨的制備研究王磊摘要為了改進(jìn)傳統(tǒng)的高純石墨生產(chǎn)方法，找到高效環(huán)保的生產(chǎn)工藝，采用密閉微波消解技術(shù)對右墨進(jìn)行了捉純。系統(tǒng)地研究了石墨樣品的預(yù)處理、消解液的配比、消解壓力、微波消解時間和微波消解功率對提純效果的影響。通過輪換實驗得出了以下結(jié)論：隨著HCI/HNO3比值和微波消解功率的增加產(chǎn)品固定碳含量先增大后減?。划a(chǎn)品同定碳含量隨著右墨原料微波預(yù)處理時間、微波消解壓力和微波消解時間的增加而增加。同等反應(yīng)條件下，石墨原料經(jīng)微波預(yù)處理5min,取出驟冷，產(chǎn)品固定碳含量更高。密閉微波消解捉純石墨的最佳實驗條件：原料經(jīng)過微波預(yù)處理5min后驟冷，消解液選用HC1:HNO3=
2、2:2,消解功率800W,消解壓力2.0Mpa,消解時間30mino制得了固定碳含量為99.449%的石墨產(chǎn)品。關(guān)鍵詞高純石墨，微波，提純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目錄.........................................................................................................................................11緒論...................................................
