公开(公告)号：US06828464B2

公开(公告)日：2004-12-07

申请号：US10718795

申请日：2003-11-24

Applicant: Shelue Liang ,  Rolf-Hartmuth Fischer ,  Sylvia Huber-Dirr ,  Andrea Haunert

Inventor： Shelue Liang ,  Rolf-Hartmuth Fischer ,  Sylvia Huber-Dirr ,  Andrea Haunert

IPC: C07C4554

CPC classification number: B01J23/04 ,  C07C45/48 ,  Y02P20/582 ,  C07C49/597

Abstract: The present invention provides a process for preparing 2-cyclopentenones of the general formula: where R1 to R4 are each hydrogen atoms or are alkyl or alkenyl radicals having from 1 to 12 carbon atoms, cycloalkyl or cycloalkenyl radicals having from 5 to 7 carbon atoms, aralkylene or aryl radicals, by converting hexenedioic acids and/or their esters of the general formulae where R1 to R4 are each as defined above and R5 and R6 are each hydrogen atoms or are alkyl radicals having from 1 to 12 carbon atoms, cycloalkyl radicals having 5 or 6 carbon atoms, aralkyl or aryl radicals, at temperatures of from 150 to 450° C., over solid, oxidic catalysts, wherein the catalysts on an oxidic support material comprise from 0.01 to 5% by weight of at least one alkali metal oxide.

Abstract translation: 本发明提供一种制备以下通式的2-环戊烯酮的方法：其中R 1至R 4各自为氢原子或具有1至12个碳原子的烷基或烯基，环烷基或环烯基具有 5-7个碳原子的亚芳基或芳基，通过将通式R 1至R 4的通式所示的己烯二酸和/或它们的酯各自如上所定义，R 5和R 6各自为 氢原子或具有1至12个碳原子的烷基，具有5或6个碳原子的环烷基，芳烷基或芳基，在150-450℃的温度下，在固体，氧化催化剂上，其中催化剂在 氧化载体材料包含0.01至5重量％的至少一种碱金属氧化物。