Patent ID: 6040477
Filing Date: 2000-03-21
Classification: C07C

Abstract:
A method of sulfodechlorinating an aromatic compound comprising(A) preparing a composition of(1) an aromatic compound having the general formula: ##STR3## where R is CHO or COOH and n is 1 to 3; (2) a sulfur-containing compound selected from the group consisting of alkali metal sulfites, alkali metal bisulfites, alkaline earth metal sulfites, and alkaline earth metal bisulfites, in an amount stoichiometric to about 20 mole % in excess of stoichiometric;(3) water in an amount sufficient to form a solution of said sulfur-containing compound; and(4) sufficient base to raise the pH of said solution to about 10 to about 14; and(B) heating said composition at about 150 to about 200.degree. C. where no catalyst is present in said composition.