505 results about "Fluoroboric acid" patented technology

A coating composition comprising an aqueous mixture containing inorganic particles, a catechol compound, and one or more fluoroacids. The preferred fluoroacids are selected from fluorotitanic acid, fluorozirconic acid, fluorosilicic acid, fluoroboric acid, fluorostannic acid, fluorogermanic acid, fluorohafnic acid, fluoroaluminic acid or salts of each thereof. The invention is also directed to a coating on a metal substrate. The coating comprises silica particles attached to the metal substrate through a metal-oxide matrix. The metal-oxide matrix comprises a metal selected from titanium, zirconium, silicon, hafnium, boron, aluminum, germanium, or tin, and a catechol compound.

The invention discloses a two-dimensional transition metal carbonitride and a preparation method and application thereof, and belongs to the technical field of two-dimensional materials. The method comprises the following steps: adding an MAX phase material into a fluoroboric acid aqueous solution for normal-pressure etching; then washing and adding the MXene into an aqueous solution of tetraalkylammonium hydroxide for post-treatment, then washing a treatment product to obtain a two-dimensional transition metal carbonitride (MXene) material; and dispersing the material into water through handcranking, oscillation, stirring, high-speed dispersion or ultrasonic dispersion to form a stable dispersion liquid. According to the method, without use of hydrofluoric acid, the method is safer and more environmentally friendly compared with hydrofluoric acid etching; and the obtained MXene material has good application in the fields of supercapacitors, lithium ion batteries, electromagnetic shielding and electro-catalysis.

The invention relates to a preparation method of a calcium fluoborate nonlinear optic crystal; calcium fluoborate and a flux are mixed, and heated to 900 - 1170 DEG C at a heating rate of 20- 100 DEG C / hour, and kept in constant temperature for 5- 50 hours, and then cooled to a temperature 2- 10 DEG C higher than saturate temperature, and a mixing melt of calcium fluoborate and the flux is obtained; the mass ratio between calcium fluoborate and the flux is 1: 0.1-1, and the flux is a LiF-CaO-B2O3 system, wherein the molar ratio of LiF: CaO: B2O3 is 1-0.5 : 0-0.37 : 0-0.2; a crystallon arranged on a crystallon rod is dropped to the mixing melt prepared through the steps and cooled to saturate temperature at the same time, the crystallon rod is rotated at a rotating rate of 5-50 revolutions / minute, then the temperature is slowly reduced at a rate of 0.2-3 DEG C / day, the obtained crystal is lifted from the liquid surface and cooled to room temperature at a cooling rate of 5- 100 DEG C / hour, and the obtained calcium fluoborate is a nonlinear optic crystal. The method has the advantages of simple operation, fast growing speed, easy growing and low cost.

Provided are an electrolytic solution for an electric double layer capacitor capable of providing an electric double layer capacitor having stable quality, an electric double layer capacitor using the electrolytic solution, and a manufacturing method for the electric double layer capacitor. The electrolytic solution includes a supporting electrolyte, sulfolane, and a linear sulfone. It is preferred that the electrolytic solution further include an organic fluorine compound. Further, it is preferred that the supporting electrolyte contain 5-azoniaspiro[4.4]nonane tetrafluoroborate, and the content of 5-azoniaspiro[4.4]nonane tetrafluoroborate be 1.5 to 3.6 mol / dm3.

The present invention relates to the preparation process of tetraethyl ammonium tetrafluoroborate as electronic level reagent in producing electronic elements. The preparation process includes recrystallization to obtain refined boric acid, preparing fluoroboric acid with hydrofluoric acid and boric acid in the equal molar ratio, exchange reaction of tetraethyl ammonium halide and fluoroboric acid at 10-50 deg.c and alcohol in the presence of organic solvent, eliminating hydrogen halide at 30-90 deg.c and reduced pressure condition, recrystallization and low temperature decompression drying to obtain ultimate product tetraethyl ammonium tetrafluoroborate. The ultimate product reaches the quality requirement of: purity not lower than 99.5 %, water content not more than 10 ppm, Fe not more than 1.0 ppm, Si not more than 3.0 ppm, Na not more than 3.0 ppm, and K not more than 3.0 ppm.

The invention discloses a method for preparing polyimide (PI) by utilizing ionic liquid. According to the method, the PI is obtained by performing polymerization on two organic monomers in an ionic liquid solution at the polymerization temperature of 100 DEG C to 300 DEG C, wherein in the two monomers, the first monomer is aromatic amine or heterocyclic amine containing three amino function groups and the second monomer is aromatic anhydride or heterocyclic anhydride containing an anhydride functional group; the molar ratio of the first monomer to the second monomer is (0.2-5):1; the ionic liquid is imidazole tetrafluoroborate or tetrabutyl phosphorus imidazolium salt; the proportion relationship between the ionic liquid and the sum of the monomers is that the molar ratio of the ionic liquid to the monomers is (1.6-5):1. By the method, an organic photocatalytic material with a visible light absorption property is obtained through thermal polymerization of simple specific monomers, water can be decomposed by solar light to produce hydrogen, and a wide application prospect is achieved.

The invention discloses a preparation method for a modified Y-type molecular sieve. The preparation method comprises the following steps: preparing an ammonium fluoroborate solution; (2) putting an industrially produced Y molecular sieve in the ammonium fluoroborate solution in the step (1), carrying out an aluminization removal and boron supplement reaction in the slurry system: NH4BF4+Al<3+>+Na<+>=NaAlF4 (a large-particle precipitate)+B<3+>+NH4<+>, and carrying out solid-liquid separation and drying after the reaction; (3) adding the molecular sieve dried in the step (2) into an alkaline solution to be pulped, and separating, washing and drying after the pulping to prepare the modified Y-type molecular sieve. The invention provides a modification method for carrying out aluminization removal and boron supplement on the Y-type molecular sieve by a combination of a boron-containing compound and the alkaline solution, so that a boron-containing modified Y-type molecular sieve which is medium / high in strong acid content is prepared.