Process and device for separating aromatics under vacuum
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United States of America Patent
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Dec 29, 2020
Grant Date -
Nov 7, 2019
app pub date -
May 2, 2019
filing date -
May 4, 2018
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention relates to a process and a device for separating a feedstock comprising benzene, toluene and C8+ compounds, by means of at least one “reformate” distillation column (C1), one aromatics extraction unit (P1), one para-xylene separation unit (P2), one xylene isomerization unit (P3) and one transalkylation unit (P4), the effluents of said units being separated in the following distillation columns: purification column (C6), deheptanizer (C7) and toluene column (C10), in which at least one of said distillation columns is suitable for being operated under vacuum so that: the majority of the C7− compounds are recovered in the product at the top of the distillation column operated under vacuum, and the majority of the C8+ compounds are recovered in the product at the bottom of the distillation column operated under vacuum.
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