Catalyst compositions and their use for hydrogenation of nitrile rubber

US10500578B2 · kind B2 · utility

Assignee

• Arlanxeo Deutschland GmbH · DE

Inventors

• Werner Obrecht · Moers, DE
• Sarah David · Dormagen, DE
• Qingchun Liu · Shandong, CN
• Zhenli Wei · Kampung Sri Tambak, MY

Key dates

• Filing date: Jan 10, 2018
• Grant date: Dec 10, 2019
• Expiry date: Feb 26, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08C19/00
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

This invention relates to novel catalyst compositions based on Ruthenium- or Osmium-based complex catalysts of the Grubbs-Hoveyda, Grela or Zhan type and specific co-catalysts comprising at least one vinyl group, pref. ethyl vinyl ether, and to a process for selectively hydrogenating nitrile rubbers in the presence of such catalyst compositions, preferably with a preceding metathesis step using the same complex catalyst as in the hydrogenation step.