The triphenyl extraction solvent is contaminated with oil in total, resulting in poor separation efficiency

2022-05-12View Original

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The feed materials C6–C8 obtained through gasoline hydrogenation are fed into the triphenyl extraction unit; however, the solvent always contains oil, which results in unsuccessful extraction. Inspection of solvent samples reveals significant amounts of oil present； At the bottom of the xylene column, a small amount of heavy aromatics is produced; this pump often gets clogged and its filter screen needs to be cleaned. A gel-like substance is formed as a by-product. Process flow: Raw materials C6–C8 go into the extraction distillation column, the solvent recovery column, the clay column, the benzene column, the toluene column, and the xylene column.

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The triphenyl extraction solvent is contaminated with oil in total, resulting in poor separation efficiency

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