串接反应色谱法对甲醇催化脱水产物的一次性分析  

Sequential Reaction Chromatography For the Product Analysis of Methanol Dehydration

作　　者：梁宇[1] 毛燕梅[2] 钟凯[2] 梁泽斌[2] 

机构地区：[1]北京大学化学与分子工程学院,北京100871 [2]北方工业大学基础科学学院,北京100041

出　　处：《分析测试技术与仪器》2000年第3期162-166,共5页Analysis and Testing Technology and Instruments

基　　金：北方工业大学科研基金

摘　　要：提出一种用微反应色谱法来研究甲醇气相脱水制备二甲醚的色谱分析流程 ,可以一次性分析得到气相和液相组份的定量数据 ,实现在线化实时分析 ,避免通常必须对液相组份进行冷凝然后单独对液相组份进行化学分析 .流程的安排是 :首先用一个色谱柱将甲醇脱水产物中的水、甲醇、乙醇完全分离并与其他组份分开 ,在氢化钙转化反应器中 ,将已经分离的水、甲醇、乙醇依次转化成氢 ,用热导检测器测定 .在串接的第二个色谱柱中实现其它组份的分离 ,并将其中的CO和CO2 在加氢转化柱上转化成甲烷 .第二色谱柱分离的组份用氢火焰离子化检测器测定 .两个色谱柱和两个检测器的分析结果组成完整的甲醇催化脱水产物的色谱图 。A novel method for analyzing the product of catalyzed methanol dehydration, in sequential connected GDX 101 column A, CaH\-2 translation reactor, TCD, GDX 101 column B, hydrogenation column, FID, was developed. H\-2O, CH\-3OH and C\-2H\-5OH, after being separated by the chromatographic column A, are changed into H\-2 orderly in CaH\-2 translation reactor, and then are detected by TCD, to not have to chemical analysis of the condensative components. The rest, CO, CH\-4, CO\-2, C\-2H\-4 and CH\-3OCH\-3, are being separated by the chromatographic column B, and CO and CO\-2 are translated into CH\-4 respectively, are finally detected with FID. The quantitative results show that the method is satisfactory with good preciseness and repeatability.

关 键 词：串接反应色谱法 甲醇 脱水产物分析 二甲醚 

分 类 号：TQ223.24[化学工程—有机化工] O657.7[理学—分析化学]