Liquid phase oxidation of halogenated ortho-xylenes

US6657068B2 · kind B2 · utility

Assignee

• General Electric Company · US

Inventors

• Robert Edgar Colborn · Niskayuna, US
• David Bruce Hall · Ballston Lake, US
• Peter Koch · Frankfurt, DE
• Gerald Oeckel · Frankfurt, DE

Key dates

• Filing date: Mar 22, 2002
• Grant date: Dec 2, 2003
• Expiry date: Mar 22, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C51/56
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A method for the manufacture of halophthalic acid by liquid phase oxidation of halo-ortho-xylene is disclosed. The halophthalic acid may be dehydrated to form halophthalic anhydride which is useful in the synthesis of polyetherimide.