Patent ID: 7138556

Claim:
A method for producing aromatic hydrocarbons comprising: contacting paraffin hydrocarbons with a ZSM-5 type high-silica zeolite-based catalyst at a temperature from 400 to 550° C., separating the contacting products into liquid and gaseous products, complete burning of gaseous products in the presence of a catalyst of complete oxidation of light hydrocarbons and adding carbon dioxide and water vapor mixture formed during burning to the raw paraffin hydrocarbons, wherein a mixture of paraffin hydrocarbons C 2 ÷C 5 is used as raw material, and before feeding the said mixture of hydrocarbons, subjecting the catalyst to treatment by paraffin hydrocarbons C 3 ÷C 4 mixed with mercaptan so that the amount of mercaptan passed through the catalyst is 0.01–0.1 mass % of the catalyst weight.