One-Step HF-Free Synthesis of Alkali Metal Fluorides from Fluorspar.

ABSTRACT: Alkali metal fluorides (MF) are commodity chemicals currently synthesized from naturally occurring fluorite (fluorspar, CaF₂) in two steps: conversion of acid grade fluorspar (AGF) into highly hazardous hydrogen fluoride (HF) followed by neutralization with alkali metal hydroxides/carbonates. Herein, we report a one-step mechanochemical reaction that converts AGF into alkali metal fluorides under basic conditions, bypassing HF. The method consists of reacting AGF with alkali metal (hydr)oxides and titanium dioxide (TiO₂) under mechanical energy for MF formation and in situ sequestration of calcium (hydr)oxide byproducts as calcium titanate (CaTiO₃). Ca²⁺ sequestration prevents reversible CaF₂ formation upon aqueous extraction, t

SUBMITTER: Schlatzer T 

PROVIDER: S-EPMC11869288 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature