Patent Number: 6,310,229

Title: Lead halophenoxides and carbonylation catalyst and method for preparing and employing them

Abstract: Lead halophenoxides, especially bromophenoxides, are prepared by the reaction of lead(II) oxides with a hydroxyaromatic compound such as phenol and a chloride or bromide salt such as an alkali metal bromide, a tetraalkylammonium bromide or a bexaalkylguanidinium bromide. They are useful in catalyst compositions for the oxidative carbonylation of hydroxyaromatic compounds to diaryl carbonates.

Inventors: Soloveichik; Grigorii Lev (Latham, NY), Patel; Ben Purushatom (Albany, NY), Ofori; John Yaw (Niskayuna, NY)

Assignee: General Electric Company

International Classification: C07C 37/00 (20060101); C07C 37/66 (20060101); C07C 39/00 (20060101); C07C 39/44 (20060101); C07C 68/00 (20060101); C07F 7/00 (20060101); B01J 31/16 (20060101); B01J 31/26 (20060101); B01J 31/22 (20060101); B01J 31/28 (20060101); C07F 007/24 (); C07C 069/96 (); B01J 031/00 ()

Expiration Date: 10/30/2018