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近年来，随着世界各国的环保意识不断加强和对汽油辛烷值升级要求日益提高，在石油化工中正丁烷异构化已成为十分重要的反应，因为异丁烷通过烷基化工艺可以合成高辛烷值的Ｃ７和Ｃ８烷基化油，而脱烃制成的异丁烯又是合成ＭＴＢＥ和ＥＴＢＥ等无铅汽油添加剂的主要原料。传统的正丁烷异构化催化剂存在着各种缺点，有的腐蚀性严重，有的对水十分敏感。七十年代末发现的ＳＯ４２－促进型氧化物固体超强酸具有热稳定性高，对环境友好，易与反应产物分离等特点，对许多酸催化反应均表现出非常高的催化活性，甚至对有些反应在常温下也显示出很高的活性和选择性，说明它们是一类很有潜力的新型催化材料。由于该类催化材料对正丁烷异构化反应表现出很高的催化活性和选择性，被人们认为是最具有前途的异构化催化剂，九十年代在世界范围内又重新兴起了固体超强酸的研究热潮。本文在我们实验室已有的工作基础上，研制了一种新型非贵金属固体超强酸催化剂（记为ＳＡ）。样品经６５０℃焙烧后拍摄的ＸＫＤ图谱中，ＳＡ－２、ＳＡ－３和ＳＡ－４样品均只出现四方晶相，而ＳＡ－１则与ＳＯ４２－／ＺｒＯ２相似，四方晶相已部分转变成单斜晶相，而且ＳＡ－１与ＳＯ４２－／ＺｒＯ２的衍射峰强度明显低于其它样品。样?
In recent years, with the increasing awareness of environmental protection and the increasing requirement for the octane number of gasoline in the world, n-butane isomerization in petrochemical industry has become a very important reaction because isobutane can be synthesized through alkylation process High-octane C7 and C8 alkylate oils, and the de-hydrocarbon made of isobutylene is the main raw material for the synthesis of unleaded gasoline additives such as MTBE and ETBE. Conventional n-butane isomerization catalysts have various disadvantages, some are highly corrosive, and some are very water-sensitive. The SO42-promoted oxide solid superacid found in the late seventies has the characteristics of high thermal stability, environmental friendliness and easy separation from the reaction products, and shows very high catalytic activity for many acid-catalyzed reactions, even for some The reaction also showed high activity and selectivity at room temperature, indicating that they are a class of promising new catalytic materials. Due to the high catalytic activity and selectivity of these catalytic materials for the isomerization of n-butane, which is regarded as the most promising isomerization catalyst in the nineties, the world over has re-emerged the solid super Strong acid research craze. Based on the work already done in our laboratory, a novel non-noble metal solid superacid catalyst (denoted as SA) has been developed. In the XKD spectra of the samples after calcination at 650 ° C, only tetragonal phases appear in the SA-2, SA-3 and SA-4 samples, while SA-1 is similar to SO42- / ZrO2 and the tetragonal phase has partially transformed into Monoclinic phase, and the diffraction peak intensity of SA-1 and SO42- / ZrO2 was significantly lower than the other samples. kind?