A closed-loop large-scale preparation method of fluoride nanomaterial is disclosed, comprising the following steps: dissolving initial raw material into water-soluble salt by using volatile acid; evaporating the remaining acid under reduced pressure and recovering; then, adding oily organic matter with high boiling point to continue to evaporate the combined volatile acid under reduced pressure; adding an oil-soluble fluorine source to the generated oil-soluble salt; increasing the reaction temperature to increase the crystallinity of the fluoride; after cooling, separating and recovering the product and the oily organic matter; and repeating the process to realize large-scale preparation. The method uses the closed-loop process flow, does not discharge waste, and has high device yield per unit volume, low production cost and low specified asset investment. The product has the characteristics of uniform particle size and good dispersibility. The method is a user-friendly and environment-friendly large-scale preparation method of the fluoride nanoparticles.

A closed-loop large-scale preparation method of fluoride nanomaterial is disclosed, comprising the following steps: dissolving initial raw material into water-soluble salt by using volatile acid; evaporating the remaining acid under reduced pressure and recovering; then, adding oily organic matter with high boiling point to continue to evaporate the combined volatile acid under reduced pressure; adding an oil-soluble fluorine source to the generated oil-soluble salt; increasing the reaction temperature to increase the crystallinity of the fluoride; after cooling, separating and recovering the product and the oily organic matter; and repeating the process to realize large-scale preparation. The method uses the closed-loop process flow, does not discharge waste, and has high device yield per unit volume, low production cost and low specified asset investment. The product has the characteristics of uniform particle size and good dispersibility. The method is a user-friendly and environment-friendly large-scale preparation method of the fluoride nanoparticles.

A composition comprising microcapsules functionalized with polymerizable functional groups on the surface of said microcapsules wherein the functional groups form covalent bonds with monomers in the continuous phase to enhance the mechanical properties of the composition.

A composition comprising microcapsules functionalized with polymerizable functional groups on the surface of said microcapsules wherein the functional groups form covalent bonds with monomers in the continuous phase to enhance the mechanical properties of the composition.

A process for preparing a fluorinating reagent from a calcium-containing compound is disclosed. The process bypasses the requirement to form hydrofluoric acid. The fluorinating reagent can be used to prepare high-value fluorochemicals.

A process for preparing a fluorinating reagent from a calcium-containing compound is disclosed. The process bypasses the requirement to form hydrofluoric acid. The fluorinating reagent can be used to prepare high-value fluorochemicals.

The invention relates to a method for obtaining a magnesium fluoride (MgF.sub.2) sol solution, comprising the steps of providing a magnesium alkoxide precursor in a non-aqueous solvent and adding 1.85 to 2.05 molar equivalents of non-aqueous hydrofluoric acid, characterized in that the reaction proceeds in the presence of a second magnesium fluoride precursor selected from the group of salts of strong, volatile acids, such as a chloride, bromide, iodide, nitrate or triflate of magnesium, or of a catalytic amount of a strong, volatile acid; and/or an additive non-magnesium fluoride precursor selected from the group of salts of strong, volatile acids, such as a chloride, bromide, iodide, nitrate or triflate of lithium, antimony, tin calcium, strontium, barium, aluminium, silicium, zirconium, titanium or zinc. The invention further relates to sol solutions, method of applying the sol solutions of the invention to surfaces as a coating, and to antireflective coatings obtained thereby.

An object of this invention is to provide a simple method for producing sulfur tetrafluoride. The object is achieved by a method for producing sulfur tetrafluoride, comprising step A of reacting a fluorinated halogen compound with sulfur chloride, the fluorinated halogen compound being represented by formula: XF.sub.n, wherein X is chlorine, bromine, or iodine; and n is a natural number of 1 to 5.

A process for generating calcium fluoride particles having a particle size (d50) of from about 15 m to about 300 m. The process features contacting a gas stream having gaseous hydrogen fluoride (HF) with a fluidized bed of calcium carbonate particles in a fluidized bed reactor.

A process for generating calcium fluoride particles having a particle size (d50) of from about 15 m to about 300 m. The process features contacting a gas stream having gaseous hydrogen fluoride (HF) with a fluidized bed of calcium carbonate particles in a fluidized bed reactor.