Abrasion resistant catalyst

US4157986A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Harry Danziger · London, GB
• Otto Immel · Krefeld, DE
• Bernd-Ulrich Kaiser
• Hans-Helmut Schwarz · Krefeld, DE
• Eberhard Bandtel · Krefeld, DE

Key dates

• Filing date: Sep 9, 1977
• Grant date: Jun 12, 1979
• Expiry date: Sep 9, 1997

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/52
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for the preparation of catalyst granulates from carbon black, boric acid, water and optionally nitrogenous additives, characterized in that from 3 to 50% by weight of a finely divided catalyst, which has already been used for the preparation of caprolactam and which has optionally been regenerated, are added.