Catalyst composition and method for producing diaryl carbonates, using bisphosphines

US6245929A · kind A · utility

Assignee

• General Electric Company · US

Inventors

• Grigorii Lev Soloveichik · Latham, US
• Ben Purushatom Patel · Albany, US
• John Yaw Ofori · Niskayuna, US
• Kirill Vladimirovich Shalyaev · Clifton Park, US

Key dates

• Filing date: Dec 20, 1999
• Grant date: Jun 12, 2001
• Expiry date: Dec 20, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C68/01
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Hydroxyaromatic compounds such as phenol are carbonylated with oxygen and carbon monoxide in the presence of a catalyst system comprising a Group VIIIB metal, preferably palladium; at least one bromide or chloride salt, preferably sodium bromide or a tetraalkylammonium bromide; at least one organic bisphosphine such as 1,3-bis(diphenylphosphino)propane or 1,4-bis(diphenylphosphino)butane; and a compound of a metal other than a Group VIII metal having an atomic number of at least 44, preferably a lead bromophenoxide. There may also be present a polar organic liquid as a cosolvent.