摘要:
本文利用Pt/SO42-/ZrO2,Pt/WO3/ZrO2负载于大比表面Al2O3的固体强酸催化剂,进行异丁烷和丁烯的烷基化反应.高压流动反应装置的测定结果表明,催化剂对异丁烷和丁烯的烷基化反应具有良好的反应活性和生成三甲基戊烷(TPM)的选择性.在150℃和5.4WPa的反应条件,Pt/WO3/ZrO2-A2O3催化剂上丁烯的转化率为100%,生成2,2,4-TMP的选择性高达83.2%.干冰冷凝承接的液体产物质谱分析表明,反应1.7h和6.8h,生成2,2,4-TMP的选择性分别为65.1%和83.2%反应过程中加人少量氢气有助于C8烷烃异构体产量的增加,减少聚合副产物的生成.
Abstract:
The alkylation of iso-butane with butene was investigated over Pt/SO42-/ZrO2 and Pt/WO3/ ZrO2-Al2O3 catalysts prepared by the authors. Based on the alkylation system with fixed bed reactor, the results showed that the catalysts have high alkylation activity and selectivity for TMPs. Under 150℃ and 5.4MPa, the conversion of butene was 100% and selectivity of 2,2,4-TMP was 83.2% over Pt/WO3/ZrO2-Al2O3 catalyst. The GC-MS analysis showed the alkylates condensed by dry ice were contained 65.1% and 83.2% 2,2,4-TMP separately at 1.7h and 6.8h. The regeneration of deactivated catalysts was studied also. It resulted in that addition of a few amounts of H2 increased the amount of the octane and its isomers, and decreased the amount of polymer by-products.