This paper compares and selects the crude benzol hydro-refining process,extraction process,and extractant.Due to the single product and high investment of the Litol hydrogenation process,as well as the high energy consumption of the gas-liquid two-stage catalytic hydro-refining process,the two-stage gas-phase catalytic hydro-refining process is selected.The extractive distillation process is selected due to the high investment and difficult operation and maintenance of the liquid phase extraction process,Sulfolane is selected as the extractant due to its good extraction and distillation effect and stable product quality.
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