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It is challenging to separate 2,4‐/2,5‐xylenol isomers with very close boiling points. In the present work, a multistep process for the separation of 2,4‐/2,5‐xylenol isomers from coal tar was investigated, involving alkylation, distillation, and dealkylation. Starting from the selection of suitable catalyst, the operating conditions for alkylation, distillation, and dealkylation were optimized by...
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