Ferric and acid complex
AssigneeBASF SE
InventorKlaus Friedrich
Life of this patent
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Abstract
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.
Claims25
A ferric and acid complex comprising the reaction product of:
- a chelant having at least one carboxylic acid functionality;
- an iron oxide;
- a base;
- and
- a reaction promoter having an Fe3+ ion.
A process for preparing a ferric and acid complex comprising the steps of:
- charging solvent into a vessel;
- charging a chelant into the vessel;
- charging a base into the vessel;
- charging an iron oxide into the vessel;
- charging a reaction promoter having an Fe3+ ion into the vessel;
- and
- heating the solvent, chelant, base, iron oxide, and reaction promoter in the vessel to a temperature of at least 170° F. for a period of at least about 3 hours to form the ferric and acid complex.
Dependencies are inferred from the claim text.