| 摘要 |
<p>A process is disclosed for upgrading reformate and/or light FCC gasoline by substantially reducing the amount of benzene in the gasoline product while simultaneously reducing the gasoline ASTM distillation End Point. The process comprises the fractionation in fractionator (20) of gasoline or reformate (10) to recover C7-C8 hydrocarbons (16), directly useful in gasoline without further conversion. A heavy bottom fraction comprising C9+ aromatic and non-aromatic hydrocarbons is recovered (14) and a C6 fraction rich in benzene is recovered (18). The total C6 fraction and a portion of the C9+ fraction are converted by alkylation, transalkylation and cracking in contact with acidic metallosilicate catalyst particles to gasoline boiling range materials rich in alkylaromatics in a reactor (30). Following debutanization or depentanization of the conversion product, the fraction containing unconverted benzene is recycled to the fractionator (20).</p> |
