| 摘要 |
<p>Alkylaromatic hydrocarbons are produced by the catalytic alkylation (4) of aromatic hydrocarbons, such as benzene, with C7-plus acyclic olefins which preferably are normal olefins. The hydrocarbonaceous effluent of the alkylation reaction zone (4) is separated by fractional distillation (6, 9, 15, 18) to yield both a product stream (26) containing monoalkylated aromatics and a small bottoms stream (19) which contains dialkylated aromatics and other high boiling compounds but which is substantially devoid of the product monoalkylated aromatics. The product stream is a portion (26) of a sidecut stream (20) withdrawn from the first (15) of two vacuum columns (15, 18), with a second portion (21) of the sidecut (20) being passed into the second column (18). The bottoms stream (17) of the first column (15) is also passed into the second column (18) and the overhead vapor (25) from the second column (18) enters an upper portion of the first column (15).</p> |
