Synthesis of Cresol: Caustic Fusion of Toluenesulfonic Acid
Synthesis of Cresol: Caustic Fusion of Toluenesulfonic Acid
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DOI：
10.1021/ie50517a056
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发表时间：
1953
影响因子：
--
通讯作者：
D. Othmer
中科院分区：
文献类型：
--
作者：
D. Othmer
图9.在磺化过程中改变最终反应温度对磺化停止后转化为甲苯磺酸的影响在表IV中给出并在图9中示出。在150 ℃时，甲苯中加入96%的硫酸，反应升温至终反应温度，通过控制热输入使反应温度保持恒定，反应时间为15h，转化率可达91%。在超过150摄氏度的温度下。反应物质变黑，形成越来越多的不溶性物质。最后是225 ℃。在达到该温度后不久，反应物质开始分解，同时放出水和甲苯。在较高的温度下，
Figure 9. Effect of Varying Final Reaction Temperature during Sulfonation on Conversion to Toluenesulfonic Acid after refluxing has ceased is given in Table IV and shown in Figure 9. The 96% sulfuric acid was added to the toluene in Vi hour and the reaction run up to the final reaction temperature with refluxing and constant heat input, at which time the reac-tion temperature was held constant for Vs hour by controlling the heat input.The results show that 91% conversion could be obtained at 150 C. At temperatures over 150 C. the reaction mass turned black and increasing quantities of insoluble materials were formed. Finally at 225 C. the reaction mass began to decompose shortly after the temperature had been reached, with both water and toluene being given off. At the higher temperatures the