METHOD OF REUSING SODIUM ALUMINUM TETRAFLUORIDE OBTAINED AS A BYPRODUCT FROM MONOSILANE PRODUCTION

摘要

The present invention is sodium aluminum fluoride to a method and a reaction apparatus therefor for producing anhydrous hydrofluoric acid Using relates, more particularly, sodium fluoride as a source of aluminum tetrafluoride (NaAlF ₄ , sodium aluminum tetrafluoride) and pre-mixed with sulfuric acid in the gas phase reactor and crushed to anhydrous hydrofluoric acid (HF , hydrogen fluoride) and gained a solid material and heat treatment again within the reactor and the resulting solid material gaseous anhydrous hydrofluoric acid and solid sodium aluminum sulfate (NaAl (SO ₄ ) ₂ , sodium aluminum sulfate) by preparing the anhydrous hydrofluoric acid by a process to obtain, expensive imported as a source of fluoride for the production of anhydrous hydrofluoric acid calcium fluoride (CaF ₂ , fluorspar) produced in place of monosilane by-product NaAlF ₄ reaction of eco-friendly and economical, as well as an intermediate viscosity because water can be recycled hydrogen sulfate, calcium (Ca (HSO ₄ ) ₂ By ) evenly distributed to suppress the formation of bulky solid and micronized by the reaction of HF, and the manufacturing yield can be significantly increased, it is possible to manufacture a large amount of HF relative to the weight of the raw industrial mass production is possible and , the Glauber's salt and aluminum sulfate by-product can be recycled separately NaAl (SO ₄ ) ₂ relates to the occurrence of anhydrous hydrofluoric acid production method and reactor for them. ;