In this paper we introduce kinds of ways of synthesizing methanesuttomc acre , lncluum~ u~,,,5 .r- sulfate as the starting material, using choromethane , using methyl mercaptan and using methane. Contrasting the old methods with the new way in synthesizing methanesulfonic acid, we could conclude that the way of using methane to synthesis methanesulfonic acid ,which is simple in prosess and producing, having no p...