production of benzene from alkylbenzolhaltigen mixtures with a high content of sulphur containing substances

摘要

This invention relates to the petrochemical industry, and, in particular, to methods for producing benzene from various benzene- and/or alkylbenzene-containing mixtures obtained by processing various oil or coal coking products. The method of this invention comprises hydrodealkylating said fractions and returning the product to the hydrodealkylation stage for recycling. The highly aromatic fraction having a high content of sulfur-containing substances, preferably not higher than 1.5 mass% of sulfur, and at least 60 mass% of C6-C15 aromatic compounds, is supplied for recycling in a quantity such that the total content of sulfur-organic substances at the output of the hydrodealkylation reactor does not exceed an admissible level that depends on the potentialities of the process line for further desulfurization of a final product.