文献类型：期刊文献

英文题名：Preparation of High-Purity Normal Hexane from Reformate Raffinate by Adsorption and Distillation Processes

作者：Liu, Jichang[1];Ni, Tengya[1];Liu, Juntao[1];Shen, Benxian[1]

机构：[1]E China Univ Sci & Technol, Shanghai 200237, Peoples R China

年份：2014

卷号：32

期号：6

起止页码：489

外文期刊名：ADSORPTION SCIENCE & TECHNOLOGY

收录：;EI(收录号：20143318073053);WOS:【SCI-EXPANDED(收录号:WOS:000340021200006)】；

语种：英文

外文关键词：Adsorption - Computer software - Hexane - Paraffins - Zeolites - Desorption

摘要：In this study, a combination process of adsorption and distillation was adopted to obtain high-purity normal hexane. In the adsorption separation process, 5A zeolite was used as the adsorbent and the Shanghai Gaoqiao, Petrochemical Corporation reformate raffinate containing 24.24 wt% normal hexane was separated into adsorption raffinate oil rich in non-normal paraffins and desorption oil rich in normal paraffins. At pre-specified operation conditions, concentration of n-hexane in the desorption oil reached higher than 96%. The concentrations of 3-methyl pentane and methyl cyclopentane, which are the light- and heavy-key components in the distillation tower of normal hexane, were reduced to 0.15% and 0.07%, respectively. According to the simulation results obtained using the software Aspen Plus, when the distillation tower has 15 stages, the n-hexane concentration can reach 99.02% with a recovery rate of 72.89% at the reflux ratio of 7.5. The combination process involving both adsorption and distillation has much higher efficiency than the traditional distillation process for producing the high-purity normal hexane.