卤水脱色及其资源化制备无水氯化镁的研究

卤水脱色及其资源化制备无水氯化镁的研究

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页数:100页

时间:2019-03-02

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1、AbstractInordertoprepareanhydrousmagnesiumchlorideastherawmaterialofelectrolysisprocess,thechromogeniccauseofbrineinTlanjinChangluHangusalternWasstudied,andacombinationdecolorizationprocessofoxidationandadsorptionusedbyhydrogenperoxideandzirconiumhydroxideWasdesigned.Thediscoloredbrinewasusedtocomp

2、osemagnesiumchloridehexahydram-anilinehydrochloridedoublesaltandammoniumcarnallitedoublesalt.Thenthedoublesaltwaspmparedtoanhydrousmagnesiumchioridebypyrogenicdecompositionmethod,whichheatedbymicrowave-tubularfumaceheatingprocess.Theresearchresultsforchromogeniccauseofbrineshowthat:themainchromogen

3、icsubstanceswaso唱anicmattersinbrine.Thechromaofbrinecouldremovedsignificantlybythecombinationdecolorizationpmce鲻ofoxidationandadsorptionusedbyhydrogenperoxideandzirconiumhydroxide,theoptimumconditionsofdecolorizationisshowedasfollows:thepHvalueofbrineneedtobeadjustedto2~3atroomtemperature.thedosage

4、ofhydrogenperoxideisl%(volumeratio)andtheoxidationtimeis2h,theadsorptiontimeis40min,thedosageofzirconiumhydroxideis609‘L~.Undersuchconditions,thedecolorizingrateofbrinecouldreach99%,theremovalofCODcrcouldreach85%,therateofmagnesiumionslosscouldcuttol%.Thezirconiumhydroxidecouldbereusedbydesorptionu

5、sing5%sodiumhydroxidesolution.Theresearchresultsofadsorptionperformancesofzirconiumhydroxidefororganicmattershowthat:themechanismtoremoveorganicmattersofzirconiumhydroxideWasFandertVaalsforceandhydrogenbondforce.theadsorptionisothermsoforganicmatterfitwellintotheLangmuiradsorptionisotherm,theadsorp

6、tionkineticdataWaSfittedtothepseudo-second--oralermodel.Onthebasisofkineticsofpyrogenicdecompositionfordoublesalt,anhydrousmagnesiumchIoridewaspreparedbydoublesaltpyrogenicdecompositionmethod,whichheatedbymicrowave-tubularfilmaceheatingprocess.Theexperimentalresultsshowthat:thedifficultyofdehydrati

7、onproce璐wasreducedbyusingpyrogenicdecompositionmethodofmagnesiumchloridehexahydrate-anilinehydrochloridedoublesalttoprepareanhydrousmagresiumchloride,butthismethodneedhighprocessrequirements,themWCI"emuchim

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