Method for producing cyclopentanone

US6429339B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Shelue Liang · Ludwigshafen, DE
• Rolf Fischer · Heidelberg, DE
• Frank Stein · Bad Dürkheim, DE
• Joachim Wulff-Doring · Bischofswerda, DE

Key dates

• Filing date: Nov 15, 2000
• Grant date: Aug 6, 2002
• Expiry date: Nov 15, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C45/48
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for preparing cyclopentanone by reacting adipic esters of the formulaR1OOC—(CH2)4—COOR2  Iwhere R1 and R2 are each alkyl having from 1 to 12 carbon atoms, cycloalkyl having 5 or 6 carbon atoms, aralkyl or aryl and R2 may additionally be hydrogen, in the presence of oxidic catalysts comprises reacting adipic esters of the formula I having less than 5% by weight of by-products other than adipic esters in the gas phase in the presence of water, a carrier gas anda) from 0.01 to 10% by weight of at least one metal oxide selected from the first or second main group of the periodic table or from the group of the rare earth metals on titanium dioxide or zirconium dioxide as catalyst support, orb) from 0.01 to 50% by weight of at least one metal oxide selected from the second main group of the periodic table on zink oxide as catalyst support.