초록

Anhydrous ferric fluoride of 99.0% purity or greater, based upon F-analysis is afforded, as well as a process for its manufacture using anhydrous FeCl3 and liquid anhydrous HF, reacted in the substantial absence of O2, H2O, or an oxidizing agent.

대표청구항 ▼

A process for the manufacture of 99.0% or greater purity anhydrous ferric fluoride according to the endothermic reaction FeCl3+3HF→FeF3 +3 HCl↑ comprising: (I) Charging anhydrous FeCl3 to a reaction vessel; then (II) Introducing liquid anhydrous HF to said vessel, in a stoichiometric amount or great

A process for the manufacture of 99.0% or greater purity anhydrous ferric fluoride according to the endothermic reaction FeCl3+3HF→FeF3 +3 HCl↑ comprising: (I) Charging anhydrous FeCl3 to a reaction vessel; then (II) Introducing liquid anhydrous HF to said vessel, in a stoichiometric amount or greater, at an addition rate effective to maintain the temperature of a resulting reaction mass at about -25°C. or higher; (III) Permitting the resulting reaction to continue to completion; (IV) Removing HCl by-product and any excess HF during the reaction; and (V) Removing any HF or H2O contained in the reaction product; said reaction being conducted in the substantial absence of O2, H2O, or other reactive agent.