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1. IN6326/CHENP/2008 - METHOD FOR PREPARING METAL DIHYDROXYBENZENEDISULFONATES

Office India
Application Number 6326/CHENP/2008
Application Date 19.11.2008
Publication Number 6326/CHENP/2008
Publication Date 27.03.2009
Grant Number 264211
Grant Date 19.12.2014
Publication Kind B
IPC
C07C 30/32
Applicants RHODIA OPERATIONS
Inventors DURY, MICHEL,
BRES, HERVE,
Priority Data 0605242 13.06.2006 FR
Title
(EN) METHOD FOR PREPARING METAL DIHYDROXYBENZENEDISULFONATES
Abstract
(EN)
ABSTRACTThe subject matter of this invention is a method for preparing metallic dihydroxybenzenedisulfonates, preferably from alkaline metals, from corresponding dihydroxybenzenedisulfonic acids. The method for preparing a metallic dihydroxybenzenedisulfonate according to the invention, from a corresponding dihydroxybenzenedisulfonic acid, is characterized by the fact that it includes the reaction of the dihydroxybenzenedisulfonic acid present in a sulfuric medium with an adequate quantity of a salt including a sulfate or hydrogenosulfate anion.