合成直链烷基苯环境友好固体酸催化剂的研究 Ⅱ .固体酸催化剂合成直链烷基苯工艺条件实验研究

苯和十二烯烷基化反应的热力学分析结果表明,苯和十二烯烷基化反应生成单烷基苯和多烷基苯的热力学可能性都很大。在一定反应温度下,在催化剂颗粒尺寸一定和外扩散影响较小的条件下,质量空速对催化剂活性的影响较小,2位-烷基苯的选择性略有增加;随着苯烯比的增加,十二烯转化率和2位-十二烷基苯选择性均有所增加。在一定的反应温度、质量空速、苯烯比和液固反应条件下,经过500min的烷基化反应,催化剂的活性无明显变化。

Study of Environmental Friendly Solid Acid Catalysts for Synthesizing Linear AlkybenzeneⅡ.Process Conditions of Synthesizing Linear Alkylbenzene by Solid Acid Catalyst

The thermodynamic analysis results of alkylation of benzene with α-dodecene showed great thermodynamic possibility of producing mono alkylbenzene,dialkylbenzene and trialkylbenzene from benzene and α-dodecene.When the catalyst particle dimension and reaction temperature were chosen as well as with small effect of external diffusion,the mass space velocity had no obvious effect on catalyst activity,and the selectivity of 2-linear alkylbenzene increased slightly;both the conversion of dodecene and the selectivity of 2-linear alkylbenzene increased with increasing ratio of benzene to dodecene.The catalyst activity did not change obviously after 500 min alkylation reaction under the fixed reaction temperature,mass space velocity,mole ratio of benzene to α-dodecene and liquid-solid reaction conditions.