甲基叔丁基醚裂解制备高纯度异丁烯  被引量:14

PRODUCTION OF HIGH PURITY ISOBUTENE BY CRACKING MTBE

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作  者:张淑梅[1] 吕志辉[1] 翟庆铜[1] 王春梅[1] 马皓[1] 

机构地区:[1]中国石油化工股份有限公司抚顺石油化工研究院,辽宁抚顺113001

出  处:《燃料化学学报》2003年第2期156-160,共5页Journal of Fuel Chemistry and Technology

摘  要:制备了一系列用于甲基叔丁基醚(MTBE)裂解制异丁烯反应的硅酸铝催化剂,评价了其反应活性和选择性,用X光衍射(XRD)、物理吸附、傅立叶变换红外(FT IR)等技术对催化剂结构性质进行表征。结果表明,添加合适的助剂、适宜的温度下焙烧有助于MTBE裂解制异丁烯硅酸铝催化剂的性能改善和活性提高。在催化剂的物化性质中,与活性关系较密切的是催化剂的比表面积、总酸量和B酸与L酸的比值。同时发现,一种添加助剂并经过特殊处理的催化剂WVI,在常压、WHSV为2h-1条件下,反应温度从220℃提高到360℃,累计时间达3840h时,MTBE转化率可达99 9%,异丁烯选择性可维持在99%。Physiochemical properties and their activity, selectivity of a series of aluminum silicate catalysts for MTBE cracking to isobutene were examined by catalytivity test, XRD, physical adsorption and FTIR The results showed that the addition of suitable promoter and calcining at an appropriate temperature could improve the physiochemical properties and activity of the catalyst In all properties measured in this paper, specific surface area, total acid amount and the ratio of Bronsted acid to Lewis acid could have close relations with catalystic activity It was also found that the MTBE conversion and isobutene selectivity over the catalyst named WVI were 999% and 99% respectively under the conditions of atmospheric pressure, 2?h-1 and a wide temperature range from 220?℃ to 360?℃

关 键 词:甲基叔丁基醚 MTBE 硅酸铝催化剂 异丁烯 裂解 

分 类 号:TQ221.213[化学工程—有机化工] O643.36[理学—物理化学]

 

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