Details

C - Chemistry, Metallurgy

07

C

C07C 303/32 (2006.01) C07C 303/22 (2006.01) C07C 309/42 (2006.01)

Patent

CA 2654109

The 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.

La présente invention a pour objet un procédé de préparation de dihydroxybenzènedisulfonates métalliques, de préférence de métaux alcalins, à partir d'acides dihydroxybenzènedisulfoniques correspondants. Le procédé de préparation d'un dihydroxybenzènedisulfonate métallique selon l'invention, à partir d'un acide dihydroxybenzènedisulfonique correspondant est caractérisé par le fait qu'il comprend la réaction de l'acide dihydroxybenzènedisulfonique présent en milieu sulfurique avec une quantité suffisante d'un sel comprenant un anion sulfate ou hydrogénosulfate.

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