Thispapermainlycoversamethodforpreparingahighlyalkalinemagnesiumlinoleatesolutionwithatotalbasenumber(TBN)valueof328mgKOH/gusinglinoleicacidasthebiodegradablerawmaterial,whichcansubstitutefortraditionallubricantdetergentsasanenvironmentallyfriendlydetergent.Reactionconditions,includingthemolarratioofmagnesiumoxidetolinoleicacid,themolarratioofmethanoltomagnesiumoxide,thecarbonationtemperature,themolarratioofwatertomagnesiumoxide,theflowrateofCO2gasandthedurationforinjectionofCO2tomagnesiumoxidesystem,wereoptimized.