英文写作化学专业

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1、StudyontheSolubilityProductofCalciumSulfateinBrineAbstractThesolubilityofcalciumsulfateindifferentconcentrationofbrineanddifferenttemperaturewasstudied・Theeffectsofdifferentionsinbrineonconcentrationofcalciumionandtheeffectsofdifferentconcentrationofbrineanddifferenttemperatureonthesolubilityprod

2、uctofcalciumsulfatewereanalyzed.Theexperimentalresultsindicatedthatthesolubilityofcalciumionincreasedfirstlyandthendecreasedwiththeincreasingoftheconcentrationofchlorideionandsodiumion.Thesolubilityofcalciumsulfateincreasedfirstlyandappearedamaximumvalueof100g/Lx150g/L>225g/Landthendecreasedwitht

3、heincreasingoftheconcentrationofsodiumchloride.Themaximumvalueincreasedwiththeincreasingoftemperature.In80°C、225g/L,thesolubilityofcalciumsulfatereachedthehighest.Thesolubilityproductofcalciumsulfateincreasedfirstlyandthendecreasedwiththeincreasingoftheconcentrationofbrine.1.IntroductionScalingor

4、theaccumulationofmaterialsdepositingonthesurfaceofequipmentisacomplicatedphenomenon,whichsignificantlyaffectsawiderangeofindustrialprocesses,withserioustechnicalandeconomicconsequences[l-4].Calciumsulphateisfrequentlyencounteredbothinnatureandinindustry[5-9].Itisalsothemostunwelcomesealantinthepr

5、oductionofoilandgas[10].Earlystudiesongypsumscalingcontrolmainlyfocussedonthekineticsofscaleformation[11,12]butlaterinvestigationsemphasizedtheinfluenceofexternalfactors[8,9,13-22].Asystematicstudyoftheeffectsofvariousprocessparametersandtheefficacyofsomeinorganicandorganicadditivesincontrollingt

6、heformationofcalciumsulphateinpipeswasfirstundertakenbyresearchersoftheDepartmentofChemicalEngineeringandA.J.ParkerCRCforHydrometallurgyatCurtinUniversityofTechnology,WA.[23,24].Calciumsulphateprecipitatesinmanydifferentsolidphases:dihydrate(orgypsum),hemihydrateandanhydrousalthoughgypsumisthemos

7、tcommononeatambienttemperature[25,26].Thesolubilityofallfbnnsofcalciumsulphatechangeswithincreasingtemperature.However,mineralizationofwater,fbrexamplebrineeffectorconcentrationsalt,isanotherimportantfactorthatneedstob