混合C4叔丁醇法生产高纯度异丁烯工艺对比  

Comparison of Various Methods of High Purity Isobutylene Production by Mixed C4 tert-butanol Process

作　　者：黄燕青 陈辉 Huang Yanqing;Chen Hui(Chemical Engineering School,Guangdong University of Petrochemical Technology,Maoming 525000,China)

机构地区：[1]广东石油化工学院化学工程学院

出　　处：《山东化工》2019年第16期55-58,共4页Shandong Chemical Industry

基　　金：2017年中央财政支持地方高校发展专项《低碳清洁转化技术与工程应用平台建设》;2014年广东省教育厅项目《劣质燃料清洁转化及精细化利用工程技术开发中心(GCZX-A1416)》;2016年茂名市工程技术研究开发中心(00110233312027)

摘　　要：混合C4馏分中异丁烯和正丁烯难以通过普通蒸馏方法分离,通过将异丁烯水合生成叔丁醇,叔丁醇再脱水生成99.5%的高纯异丁烯,可实现混合C4中异丁烯馏分的有效分离和C4资源的高值化利用。叔丁醇水合-脱水法主要包括硫酸吸收分离工艺、离子交换树脂工艺等,分析对比不同浓度下硫酸萃取吸收分离法、Chaplits并流水合磺酸树脂法、逆流水合磺酸树脂法的发展历程、反应机理、工艺流程、工艺特点等内容,指出逆流水合离子交换树脂法工艺优于其它两种方法,并具有很好的潜在工业应用前景,其最佳操作条件反应温度80~95℃,0.25~2MPa,其异丁烯回收率90%~95%,纯度99.9%以上。Isobutene and n-butene in mixed C4 fraction are difficult to be separated by ordinary distillation.By hydrating isobutene to tert-butanol and dehydrating tert-butanol to produce 99.5% high purity isobutene,effective separation of isobutene fraction in mixed C4 and high value utilization of C4 fractions can be achieved.The hydration-dehydration process of C4 tert-butanol mainly includes sulfuric acid absorption separation process and ion exchange resin process.The development history,reaction mechanism,process flow and process characteristics of extraction-absorption separation process of sulfuric acid,Chaplits co-hydration sulfonic acid resin process and countercurrent hydration sulfonic acid resin process at different concentrations are described and compared.It is pointed out that countercurrent hydration ion exchange resin process is superior to the other two processes.The process has good industrial application prospects.The optimal results are given below: Recovery rate of isobutene 90%~95% and purity of isobutene over 99.9% under the conditions of the reaction temperature of 80~95 ℃ and reaction pressure 0.25~2 MPa.

关 键 词：混合C4 高纯异丁烯 叔丁醇脱水法 硫酸吸收分离法 离子交换树脂法 

分 类 号：TE65[石油与天然气工程—油气加工工程]