Process for producing hydrogen fluoride and phosphoric acid

A process for producing hydrogen fluoride from fluoride bearing ores comprising

• forming a slurry of a stoichiometric excess of fluorosulfonic acid and a calcium phosphate ore, in the presence of calcium fluoride,
• reacting the slurry components to produce volatile phosphorous compounds and hydrogen fluoride,
• separating the volatile phosphorous compounds and hydrogen fluoride from the reaction mass,
• separating the volatile phosphorous compounds from the hydrogen fluoride,
• recovering the hydrogen fluoride.

A process for producing hydrogen fluoride and phosphoric acid comprising

• forming a slurry of calcium phosphate material with sufficient fluorosulfonic acid to produce volatile phosphorous compounds,
• including in the slurry calcium fluoride, to produce hydrogen fluoride,
• separating the hydrogen fluoride and volatile phosphorous compounds from the fluorosulfonic acid and residual mass,
• hydrolyzing the volatile phosphorous compounds to produce phosphoric acid, and
• recovering the hydrogen fluoride from the calcium fluoride as an additional product to hydrogen fluoride produced on hydrolysis of the volatile phosphorous compounds to form phosphoric acid.