超重力催化反应精馏技术合成乙酸正丁酯的研究  

A new high gravity catalytic reactive distillation process for n-butyl acetate synthesis

作　　者：史琴[1] 张鹏远 初广文[1] 陈建峰[1] 

机构地区：[1]北京化工大学教育部超重力工程研究中心,北京100029

出　　处：《北京化工大学学报（自然科学版）》2011年第1期5-9,共5页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：国家"863"计划(2008BAE64B03);浙江省重大科技专项(2008C13014-6)

摘　　要：首次以超重力旋转床（RPB）代替反应精馏塔进行催化反应精馏合成乙酸正丁酯的实验研究，以评估超重力技术在反应精馏领域应用的可行性和优劣性。在本研究中心自主设计的新型RPB中，首次用固体酸催化剂制成旋转床填料置于RPB内腔，填充密度为336kg／m^3，乙酸和正丁醇为原料，在RPB中同时进行反应和分离过程。实验中主要考察了旋转床的转子转速对催化精馏效果的影响。结果表明，在转速为700～800r／min时反应的效果最佳，乙酸转化率达88％以上。同时设计催化精馏对比实验，在基本条件相同情况下，催化精馏实验的乙酸转化率为60％，远低于RPB实验，所得产品纯度相差20％以上。因此，超重力条件有利于提高催化剂催化效率。The synthesis of n-butyl acetate has been carried out for the first time in a novel rotating packed bed （RPB） in order to evaluate the feasibility and applicability of high gravity technology in reactive distillation. The nbutyl acetate was synthesized by using a strong acid cation exchange resin as the catalyst and acetic acid and n-butanol as reactants. The catalyst was packed into the RPB with a density of 336 kg/m3 , and the processes of reaction and distillation were carried out simultaneously. The effect of varying the RPB rotation speed was investigated ; the optimal rotation speed was found to be 700 -800 r/min, giving a conversion of acetic acid of over 88%. When conventional catalytic reactive distillation was carried out with the same proportion of catalyst, the conversion of acetic acid was only 60% , which is significantly worse than in the RPB experiment. The results indicate that high gravity technology can significantly enhance catalyst efficiency in the reactive distillation field.

关 键 词：超重力旋转床 催化精馏 乙酸正丁酯 阳离子交换树脂 

分 类 号：TQ028.8[化学工程]