Process for the Production of Iron(III) Chloride (FeCl3) from Iron-Containing Raw Materials

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This patent describes a process for producing iron(III) chloride (FeCl3) from iron-containing raw materials (with at least 1% iron by mass). The process involves mixing the raw materials in particle form with solid ammonium chloride, heating the mixture to 250–450°C in an inert gas stream or under vacuum to generate gaseous iron(III) chloride, and then cooling the gas to collect solid iron(III) chloride.

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• Production of high-purity iron(III) chloride for use in water treatment plants
• Manufacturing of FeCl3 for electronic etching processes
• Use in chemical synthesis as an industrial reagent
• Recycling of iron-containing industrial waste into valuable chemicals

BenefitsContent extracted from patent full text and abstract with AI.

• Enables the use of low-grade iron-containing raw materials, reducing waste
• Simplifies the production of solid iron(III) chloride from various sources
• Can be performed under controlled conditions (inert gas or vacuum) for purity
• May lower production costs by using readily available and inexpensive starting materials

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Patent Abstract

Die Erfindung betrifft ein Verfahren zur Herstellung von Eisen(III)-chlorid aus eisenhaltigen Rohstoffen mit einem Eisengehalt von ≥ 1 m%, bezogen auf die Gesamtmasse der Rohstoffe, wobei die Rohstoffe in Form von Partikeln eingesetzt werden, mit den Schritten a) Vermischen der Rohstoffe mit festem Ammoniumchlorid, b) Erhitzen des in a) erhaltenen Gemischs auf 250 bis 450 °C in einem Inertgasstrom oder in einer Quarzglasampulle im Vakuum zur Erzeugung gasförmigen Eisen(III)-chlorids und c) Abkühlen des in b) erhaltenen gasförmigen Eisen(III)-chlorids, zum Erhalt festen Eisen(III)-chlorids.