A kind of method for producing benzene, toluene and xylene from inferior diesel raw material
A xylene and raw material technology, applied in the field of hydrocarbon oil cracking, can solve the problem of low octane number of gasoline fractions, and achieve good synergy, excellent selectivity, and excellent selectivity
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Embodiment 1
[0052] The feed oil F enters the hydrorefining reaction zone together with the hydrogen, contacts and reacts with the protective agent A and the hydrofinishing catalyst B, and the reaction effluent from the hydrofinishing reaction zone enters the hydrocracking reaction zone I without any intermediate separation. The first hydrocracking catalyst C contacts and reacts. After the reaction effluent of hydrocracking reaction zone I is mixed with middle distillate and hydrogen-rich gas, it enters hydrocracking reaction zone II, contacts and reacts with the second hydrocracking catalyst D, and breaks the alkyl side chain, and takes into account the Selective ring-opening cracking of tetrahydronaphthalene monocyclic aromatics. The reaction effluent from hydrocracking reaction zone II enters the separation facilities such as cold high-pressure separator, cold low-pressure separator, and fractionation tower in turn, and obtains light gasoline fraction, heavy gasoline fraction, middle di...
Embodiment 2
[0056] The feed oil F enters the hydrorefining reaction zone together with the hydrogen, contacts and reacts with the protective agent A and the hydrofinishing catalyst B, and the reaction effluent from the hydrofinishing reaction zone enters the hydrocracking reaction zone I without any intermediate separation. The first hydrocracking catalyst C contacts and reacts. After the reaction effluent of hydrocracking reaction zone I is mixed with middle distillate and hydrogen-rich gas, it enters hydrocracking reaction zone II, contacts and reacts with the second hydrocracking catalyst D, and breaks the alkyl side chain, and takes into account the Selective ring-opening cracking of tetrahydronaphthalene monocyclic aromatics. The reaction effluent from hydrocracking reaction zone II enters the separation facilities such as cold high-pressure separator, cold low-pressure separator, fractionation tower, etc. in turn, and obtains light gasoline fraction, heavy gasoline fraction, middle ...
Embodiment 3
[0060] The raw material oil G enters the hydrofinishing reaction zone together with the hydrogen, contacts and reacts with the protective agent A and the hydrofinishing catalyst B, and the reaction effluent from the hydrofinishing reaction zone enters the hydrocracking reaction zone I without any intermediate separation, and The first hydrocracking catalyst C contacts and reacts. After the reaction effluent of hydrocracking reaction zone I is mixed with middle distillate and hydrogen-rich gas, it enters hydrocracking reaction zone II, contacts and reacts with the second hydrocracking catalyst D, and breaks the alkyl side chain, and takes into account the Selective ring-opening cracking of tetrahydronaphthalene monocyclic aromatics. The reaction effluent from hydrocracking reaction zone II enters the separation facilities such as cold high-pressure separator, cold low-pressure separator, and fractionation tower in turn, and after cooling, separation, and fractionation, light ga...
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