4results about "Hydrogen fluoride" patented technology

This invention relates to a method for preparing electronic-grade hydrofluoric acid. The invention utilizes a microchannel reactor for the fluorine oxidation reaction, significantly reducing fluorine consumption and safety hazards during production. Furthermore, the microchannel reactor enhances the gas-liquid two-phase mass transfer during the oxidation reaction, further improving impurity removal and product quality. The addition of multi-effect distillation to the distillation process not only enables secondary heat utilization but also saves on the use of high-temperature heating media at the bottom of the column, effectively reducing energy consumption. In the modified liquid, DMF serves as the solvent, cobalt nitrate provides cobalt ions, and vinylguanidine provides guanidine functional groups and amino groups. Ammonia and propanethiol are used as plasma gases to introduce amino and thiol groups onto the membrane surface. These groups help improve membrane selectivity, effectively separating metal and non-metal ions, as well as acidic impurities in the raw materials.

The present application relates to the field of hydrofluoric acid production equipment, especially to a leakage-proof hydrofluoric acid production equipment, which comprises a bottom platform and a lifting machine, etc.; the bottom platform is connected with the lifting machine.When the reaction kettle leaks hydrofluoric acid, the lifting plate drives the reaction kettle to sink to the bottom platform, reducing the spraying distance of the leaked hydrofluoric acid from the reaction kettle, effectively controlling the leakage range of the hydrofluoric acid in the reaction kettle, and the outer edge of the bottom platform is provided with an annular spray pipe for continuously spraying fire-fighting liquid to the reaction kettle, diluting and treating the leaked hydrofluoric acid in time, reducing the volatilization amount of the hydrofluoric acid, and thus reducing the pollution degree of the hydrofluoric acid to the external environment.The technical problem that the existing hydrofluoric acid production device cannot effectively control the leakage of the hydrofluoric acid in the first time when the hydrofluoric acid leaks is solved.

To provide a novel azeotropic composition and a separation method using the same.SOLUTION: One embodiment of an azeotropic composition contains 1,2-difluoroethylene (HFO-1132) and hydrogen fluoride. Another embodiment of an azeotropic composition contains 1,1,2-trifluoroethylene (HFO-1123) and hydrogen fluoride. There is also provided a separation method for a composition that contains hydrogen fluoride and at least one selected from the group consisting of trans-1,2-difluoroethylene (HFO-1132(E)), cis-1,2-difluoroethylene (HFO-1132(Z)) and 1,1,2-trifluoroethylene (HFO-1123).SELECTED DRAWING: None

The present disclosure relates to a process for preparing high purity Lithium Hexafluorophosphate (LiPF6), comprising the steps of: (a) reacting high purified anhydrous hydrogen fluoride (AHF) gas with solid phosphorous pentachloride to produce a mixture of pure phosphorous pentafluoride and hydrogen chloride gas, (b) reacting highly purified lithium fluoride dissolved in AHF solution with phosphorous pentafluoride and hydrogen chloride gas mixture obtained in step (a) to obtain LiPF6 mother liquor, which is LiPF6 dissolved in AHF; crystallizing the LiPF6 from the mother liquor in static crystallizer, separating the mother liquor, drying the product to remove HF; followed by drying and crushing of the crystals of LiPF6 to obtain LiPF6 powder.