This choice fuming sulfuric acid ( 50 % ) as sulfonating agent obtained the highest content of active matter choose one alkyl ether and fuming sulfuric acid molar ratio of 1.0:1.6 more appropriate product to 58.4 % active matter content .

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Para - nitrotoluene - ortho - sulphonic acid was synthesized from para - nitrotoluene and concentrated sulfuric acid as raw material in the mixed solvents comprising naphtha solvent and petroleum ether by liquid phase sulfonation method .

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Hydrocarbyl sulfuryl chloride was prepared by the oxidation of S - hydrocarbyl isothiouronium salts thiocyanic esters and sulfuric ether in the medium of hydrochloric acid under mild conditions with high yields .

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