Sinopec has been granted an invention patent for: “A method for separating heavy aromatics from kerosene fractions”
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Sinopec (600028) has newly obtained an invention patent grant, titled “A Method for Separating Heavy Aromatics from Kerosene Fractions”. The patent application number is CN202210516456.8, and the grant date is August 12, 2025. Sinopec has been granted an invention patent for: “A method for separating heavy aromatics from kerosene fractions”. Patent abstract: A method for separating heavy aromatics from kerosene fractions, which involves bringing the raw material into contact with a selective main solvent and a cosolvent in an extraction tower to carry out liquid-liquid extraction; the overhead stream is then subjected to distillation and washing to yield a raffinate product. The rich solvent at the bottom of the tower is subjected to back-extraction and solvent recovery to obtain heavy aromatic products. The selective primary solvent exhibits high selectivity for heavy aromatics and strong solvating power. Using this method, heavy aromatic hydrocarbon products with a purity of over 99 wt% and a yield of over 95 wt% can be obtained, while internal recycling of multiple streams is achieved with no wastewater discharge.
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