Methods to store transition metal organophosphorous ligand based catalysts

US10478812B2 · kind B2 · utility

Assignees

• Dow Technology Investments LLC · US
• BASF SE

Inventors

• Thomas C. Eisenschmid · Cross Lanes, US
• Michael Becker · Ludwigshafen, DE
• Donald L. Campbell, Jr. · Short Hills, US
• Michael A. Brammer · Freeport, US
• Glenn A. Miller · Richmond, US
• Edward Adrian Lord · London, GB
• Jens Rudolph · Abu Dhabi, AE
• Hans-Rüdiger Reeh · Einselthum, DE

Key dates

• Filing date: Apr 13, 2012
• Grant date: Nov 19, 2019
• Expiry date: May 23, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/582
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The catalyst solution used in a hydroformylation process is prepared for storage by first reducing its acid concentration and/or water content, and then storing the solution under a blanket of syngas and/or an inert gas. Alternatively, or in addition to, the catalyst solution can be stored with an aqueous buffer comprising materials that will neutralize and/or absorb the acid species within the catalyst solution.