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.
出处
《北京化工大学学报（自然科学版）》
CAS
CSCD
北大核心
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)
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
rotating packed bed
catalytic rectification
n-butyl acetate
cation exchange resin
