Method for recycle of bromide-containing catalyst constituents

US6310232A · kind A · utility

Assignee

• General Electric Company · US

Inventors

• John Yaw Ofori · Niskayuna, US
• Eric James Pressman · East Greenbush, US
• Ben Purushotam Patel · Niskayuna, US
• Phillip Oscar Moreno · Dalton, US
• Richard Anthony Battista · Greenwood, US

Key dates

• Filing date: Nov 10, 2000
• Grant date: Oct 30, 2001
• Expiry date: Nov 10, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/584
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Bromide source such as alkali metal bromide, alkaline earth metal bromide, or onium bromide, present as part of a catalyst mixture in an organic oxidative carbonylation mixture further comprising diaryl carbonate and a hydroxyaromatic compound, is often at least partially converted to organic bromide such as bromophenols. The bromide source can be recycled after reaction through treatment with an aqueous acidic bromide solution such as hydrogen bromide, preferably after removal of a major proportion of hydroxyaromatic compound such as phenol.