Method for producing lactams

US6353101B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Matthias Eiermann · Schifferstadt, DE
• Thomas Narbeshuber · Ludwigshafen, DE

Key dates

• Filing date: May 31, 2000
• Grant date: Mar 5, 2002
• Expiry date: May 31, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D201/08
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a process for preparing lactams by cyclizing hydrolysis of amino nitriles with water in the gas phase on catalysts which comprise oxides or mixed oxides of the metals of groups 3, 4, 5, 13 and/or 14 of the Periodic Table, where appropriate in addition a metal oxide of groups 6, 7, 8, 9 and/or 10, and further comprise a phosphate, carbonate, silicate, arsenite, arsenate, antimonite, antimonate and/or nitrate of said metals and/or, if metal oxides of groups 6, 7, 8, 9 or 10 are present, a sulfate of the abovementioned metals.