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CATALYST PERFORMANCE IN PROPYLENE EPOXIDATION

机译:丙烯环氧化中的催化剂性能

摘要

The present disclosure relates to a method of epoxidizing an olefin to form an epoxide, the method comprising contacting an alkene(C≦12) or aralkene(C≦12) with a titanium silica catalyst, a peroxide, a buffer, and one or more organic solvents in a reaction mixture, wherein the one or more organic solvents comprise a first organic solvent selected from:; R1—OH  (I),; R2—CN  (II),; R3—C(O)—R4  (III) or; R5—O—R6  (IV)wherein:R1 is alkyl(C≦12), aryl(C≦12), aralkyl(C≦12) or a substituted version of any of these groups;R2 is alkyl(C≦12), aryl(C≦12), aralkyl(C≦12) or a substituted version of any of these groups;R3 is hydrogen, alkyl(C≦6) or substituted alkyl(C≦6); andR4, R5, and R6 are each independently selected from alkyl(C≦12), aryl(C≦12), aralkyl(C≦12) or a substituted version of any of these groups, or are taken together are alkoxydiyl(C≦12), alkanediyl(C≦12), substituted alkoxydiyl(C≦12) or substituted alkanediyl(C≦12).
机译:本公开涉及一种使烯烃环氧化以形成环氧化物的方法,该方法包括使烯烃(C≤12)或芳烃(C≤12)与烯烃接触。钛二氧化硅催化剂,过氧化物,缓冲剂和一种或多种有机溶剂在反应混合物中,其中一种或多种有机溶剂包括选自以下的第一有机溶剂: <?in-line-formulae description =“在线表达式” end =“ lead”?> R 1 -OH(I),<?in-line-formulae description =“在线公式“ end =“ tail”?>; <?in-line-formulae description =“在线表达式” end =“ lead”?> R 2 -CN(II),<?in-line-formulae description =“在线公式“ end =“ tail”?>; <?in-line-formulae description =“在线表达式” end =“ lead”?> R 3 -C(O)-R 4 (III)或<?in-line-formulae description =“在线公式” end =“ tail”?>; <?in-line-formulae description =“在线表达式” end =“ lead”?> R 5 —O-R 6 (IV)<?in- line-formulae description =“ In-line Formulae” end =“ tail”?> 其中: R 1 是烷基(C≦12),芳基(C≦12) ,芳烷基(C≦12)或这些基团中的任何一个的取代版本; R 2 是烷基(C≦12),芳基(C≦12),芳烷基(C≦12)或a这些基团中的任何一个的取代版本; R 3 是氢,烷基(C≦6)或取代的烷基(C≤6);和 R 4 ,R 5 和R 6 各自独立地选自烷基(C≤12),芳基(C≤12),芳烷基(C≤12)或取代的版本这些基团中的任何一个或一起是烷氧基二基(C≤12),烷二基(C≤12),取代的烷氧基二基(C≤12)< / Sub>或取代的烷二基(C≦12)

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