Polybetaine-stabilized, palladium-containing nanoparticles, a process for preparing them and also catalysts prepared from them for producing vinyl acetate

US6074979A · kind A · utility

Assignee

• Celanese GmbH · US

Inventors

• Alfred Hagemeyer · Sunnyvale, US
• Uwe Dingerdissen · Seeheim-Jugenheim, DE
• Hans Millauer · Eschborn, DE
• Andreas Manz · Basel, CH
• Klaus Kuhlein · Kelkheim, DE

Key dates

• Filing date: May 21, 1998
• Grant date: Jun 13, 2000
• Expiry date: May 21, 2018

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J35/45
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Polybetaine-stabilized, palladium-containing nanoparticles, a process for preparing them and also catalysts prepared from them for producing vinyl acetate. The invention relates to soluble nanoparticles which comprise palladium alone or palladium together with metals of the groups 8-11 of the periodic table and which are embedded in protective colloids, wherein the protective colloids comprise at least one polymer having betaine groups, and to a process for preparing them. The soluble nanoparticles are suitable for the preparation of catalysts.