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1. US20100056823 - Preparation of metallic dihydroxybenzene-disulfonates

Office United States of America
Application Number 12304887
Application Date 12.06.2007
Publication Number 20100056823
Publication Date 04.03.2010
Grant Number 08263803
Grant Date 11.09.2012
Publication Kind B2
IPC
C07C 309/42
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
309Sulfonic acids; Halides, esters, or anhydrides thereof
01Sulfonic acids
28having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton
41containing singly-bound oxygen atoms bound to the carbon skeleton
42having the sulfo groups bound to carbon atoms of non-condensed six-membered aromatic rings
Applicants Rhodia Operations
Inventors Dury Michel
Bres Hervé
Agents SNR Denton US LLP
Priority Data 06 05242 13.06.2006 FR
Title
(EN) Preparation of metallic dihydroxybenzene-disulfonates
Abstract
(EN)

Metallic dihydroxybenzenedisulfonates are prepared, preferably from alkaline metals, from corresponding dihydroxybenzenedisulfonic acids, by reacting the dihydroxybenzenedisulfonic acid present in a sulfuric medium with an adequate amount of a salt including a sulfate or hydrogenosulfate anion.