摘要
杂多酸是一种同时具有酸性和氧化还原性的新型催化剂。杂多酸固载化后 ,不仅能在液相氧化和酸催化反应中把催化剂从反应介质中方便地分离出来 ,而且还可以使这类均相催化反应多相化。实验表明 ,载体的种类、杂多酸的固载量、活化温度等对固载杂多酸的吸附量、活性、寿命等方面都有一定的影响 ,结晶水的个数也影响着杂多酸的酸性。固载杂多酸可用于很多反应 ,如 :醚化、烷基化、异构化、酯化、烯烃水解、醇类脱水、羧酸分解等。固载杂多酸在这些反应中显示出很高的活性和选择性 ,因而是一种具有广阔应用前景的催化剂。
Heteropolyacid(HPAS) is a new type of catalyst possessing both acidic and REDOX catalytic properties. Heterogenized HPAS could not only make them more conveniently be separated from reaction products in liquid phase oxidation and acid-catalyzed reaction, but also create favorable factors for realizing heterogenization of homogenous reaction. The category of support, supported amount, activating temperature, etc can influence the amount of absorption, activity and lifetime of supported heteropolyacids, and the number of crystal water can influence the acidity of heteropolyacids. Supported heteropolyacids may be applied in many reactions, for example: etherification, alkylation, isomerization, esterification, olefins hydration, alcohols dehydration, carboxlic acids decomposition and so on. In these reactions, supported heteropolycids have very high activity and selectivity. So they have a good prospective of application.
出处
《抚顺石油学院学报》
2000年第3期7-12,共6页
Journal of Fushun Petroleum Institute
关键词
固载杂多酸
催化反应
催化剂载体
催化剂
Supported heteropolyacid
Carrier
Catalytic reaction
Heterogenization *To whom correspondence should be addressed.
