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Manufacture of high purity benzene and para-rich xylenes by combining aromatization and selective disproportionation of impure toluene
Manufacture of high purity benzene and para-rich xylenes by combining aromatization and selective disproportionation of impure toluene
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机译:通过芳构化和不纯甲苯的选择性歧化相结合生产高纯度苯和对位富二甲苯
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摘要
A process is set forth for reacting impure toluene to obtain benzene, toluene and a para-rich xylene stream, which are substantially free of close-boiling non-aromatics. The impure toluene comprises at least 70 wt % toluene and between about 0.2 wt % and about 5 wt % close-boiling non-aromatics. The process may also comprise aromatizing a naphtha over a non-acidic catalyst. The impure toluene from the aromatization step is passed over an acidic intermediate pore zeolite to produce a para-rich xylene stream and chemically pure benzene.
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