| |
Lead halophenoxides and carbonylation catalyst and method for preparing and employing them - Patent 6310229 |
 | | 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. |
 | | When the bromide or chloride salt is an inorganic salt such as sodium bromide, the reaction is preferably facilitated by the presence of an electron-donating compound, especially a nitrile such as acetonitrile or a polyether such as diethylene glycol dimethyl ether (diglyme) or tetraethylene glycol dimethyl ether (tetraglyme). |
 | | Lead(II) oxide (PbO), 2.715 g, was dissolved in 10 ml of phenol (PhOH) at 100.degree. |
| www.freepatentsonline.com /6310229.html (2999 words) |