A method of using hydrogen effectively in the production of aromatics from heavy aromatic oils

摘要

A method of using hydrogen effectively in the production of aromatics from heavy aromatic oils. By hydrocracking and hydrotreating pure hydrogen stream and a substantially hydrocarbonaceous stream containing a C ₉⁺ hydrocarbons to produce a hydrocracking zone effluent stream comprising aromatics. The separate hydrocracking zone effluent stream, light hydrocarbons, hydrocarbons boiling point of between 180 ° F~380 ° F, and can be separated and recovered from the diesel and C _4. Combined and heated with low purity hydrogen stream containing hydrocarbons heavier, and transalkylation dehydrogenation or next to form aromatics hydrogen and volatile compounds. Was separated from the aromatics volatile components and hydrogen, to give a hydrogen-containing stream substantially pure is treated by pressure swing adsorption, compresses it, and supplies it to the hydrocracking step and the hydrogen treatment. I want to recover the liquid product from an aromatic substance containing stream. [Selection] Figure Figure 1