Sulfodechlorinating aromatic compounds

Details Sulfodechlorinating aromatic compounds Sulfodechlorinating aromatic compounds

1998-12-03

2000-03-21

Geist, Gary

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

Organic compounds

Sulfonic acids or salts thereof

562 56, 568 31, C07C30932, C07F 1100

Patent

active

060404779

ABSTRACT:
Disclosed is method of sulfodechlorinating an aromatic compound. A composition is prepared of (1) an aromatic compound having the general formula ##STR1## Where R is CHO or COOH and n is 1 to 3, (2) an alkali metal or alkaline earth metal sulfite or bisulfite in an amount stoichiometric to about 20 mole % in excess of stoichiometric, (3) water in an amount sufficient to form a solution of the sulfite or bisulfite, and (4) sufficient base to raise the pH of the composition to about 10 to about 14. The composition is heated at about 150 to about 200.degree. C. No catalyst is present in the composition.

REFERENCES:
patent: 2407351 (1946-09-01), Stammbach
patent: 4710322 (1987-12-01), Metz

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