<I>m</I>-および<I>P</I>-キシレンスルホン酸の加水分解
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The hydrolysis of m-and p-xylenesulfonic acids was performed with sulfuric acid of various concentrations and the unchanged xylenesulfonic acids were determined as barium salts.The kinetic results were explained as a reversible reaction and the rate constants k=k<SUB>1</SUB>+k<SUB>2</SUB>=1/t ln x<SUB>e</SUB>/x<SUB>e</SUB>-x and the activation energies were determined.<BR>The plots of log k<SUB>1</SUB> to H<SUB>0</SUB> (acidity function) and log k<SUB>2</SUB> to H<SUB>0</SUB> gave straight lines with slopes 0.7, 1.67 for m-xylensulfonic acid at 100°C and 0.6, 1.5 for p-xylenesulfonic acid at 130°C respectively.No appearent hydrolysis was observed when the sulfonic acids were treated with sulfuric acid of specific gravity more than 1.652.
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