BMIM Cl-AlCl3离子液体催化正戊烷异构化反应性能

摘要

In order to study the catalytic isomerization performance of ionic liquid,the acidity of synthesized ionic liquid [BMIM]Cl-AlCl3 were characterized by acetonitrile adsorption FT-IR spectra and UV-vis spectra.The effects of AlCl3 mole fraction,types and amount of initiator,reaction temperature and catalyst/oil mass ratio on pentane isomerization were also investigated.The results show that the acidities of ionic liquids are enhanced with the increase of AlCl3 mole fraction.When the AlCl3 mole fraction and 1-chlorobutane volume fraction is 0.70 and 8％,respectively,the conversion of n-pentane and yield of isoparaffin can reach to 88.1％ and 74.8％,respectively at the conditions of 120 C and catalyst/oil mass ratio of 1∶1.%为研究离子液体的催化异构化性能,通过乙腈吸附红外光谱和紫外可见吸收光谱测定了合成的1-丁基-3-甲基咪唑氯铝酸([BMIM]Cl-AlCl3)离子液体的酸性,并考察了离子液体中氯化铝的含量、引发剂种类及用量、反应温度以及剂油比等条件对正戊烷异构化反应的影响.结果表明,离子液体酸性随氯化铝含量升高而增强,当离子液体中氯化铝摩尔分数为0.70、添加的氯代正丁烷的体积为原料正戊烷体积的8％、反应温度为120℃、剂油质量比为1∶1时,正戊烷的转化率达到88.1％,异构烷烃收率达到74.8％.