Method for preparation of salts of hydroxy-substituted...

Details Method for preparation of salts of hydroxy-substituted... Method for preparation of salts of hydroxy-substituted...

2011-03-08

2011-03-08

Witherspoon, Sikarl A (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C568S723000

Reexamination Certificate

active

07902407

ABSTRACT:
A method for preparing a metal salt of a hydroxy-substituted aromatic compound is described. The method comprises contacting in an aqueous medium at least one hydroxy-substituted aromatic compound with a base comprising a metal cation to provide a mixture comprising water and a metal salt of said hydroxy-substituted aromatic compound. The aqueous metal salt is then contacted with a substantially water-immiscible solvent at a temperature greater than the boiling point of water at the prevailing pressure to provide a slurry comprising the metal salt of the hydroxy-substituted aromatic compound and a vapor stream comprising the water-immiscible solvent and water. The components of the vapor stream are separated using a vapor handling system comprising a partial reflux condenser to provide a water-rich component and a water immiscible solvent-rich component.

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U.S. Appl. No. 10/647,890, filed Aug. 25, 2003, entitled “Method for Making Salts of Hydroxy-Substituted Hydrocarbons”.

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