Ferric and acid complex

C - Chemistry – Metallurgy – 07 – F

Patent

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Details

C07F 15/02 (2006.01) C07C 227/18 (2006.01) C07C 229/16 (2006.01) G03C 1/64 (2006.01)

Patent

CA 2610867

A ferric and acid complex includes the reaction product of a chelant, iron oxide, a base, and a reaction promoter. The chelant has at least one carboxylic acid functionality. The reaction promoter has an Fe3+ ion. A process for preparing the ferric and acid complex in a vessel includes charging solvent, the chelant, the base, the iron oxide, and the reaction promoter into the vessel. The solvent, chelant, base, iron oxide, and reaction promoter are heated to a temperature of at least 170 ~F for a period of at least about 3 hours to form the ferric and acid complex. Due to the use of the reaction promoter having the Fe3+ ion, the process for preparing the ferric and acid complex results in reduced degradation of the chelant during processing and, thus, a high quality ferric and acid complex.

La présente invention concerne un complexe ferrique et acide comprenant le produit de réaction d'un séquestrant, d'oxyde de fer, d'une base et d'un promoteur de réaction. Le séquestrant comporte au moins une fonctionnalité acide carboxylique. Le promoteur de réaction comporte un ion Fe3+. L'invention concerne également un procédé d'élaboration de ce complexe ferrique et acide dans un réacteur. A cet effet, on charge dans le réacteur le solvant, le séquestrant, la base, l'oxyde de fer et le promoteur de réaction, et on les y chauffe à au moins 170 °F pendant au moins environ 3 heures de façon à former le complexe ferrique et acide. Le recours à un promoteur portant l'ion Fe3+ on aboutit à une moindre dégradation du séquestrant pendant l'élaboration du complexe, ce qui donne une meilleure qualité du complexe ferrique et acide.

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