5results about How to "Acid resistant" patented technology

This invention discloses a method for separating fluorosilicic acid and hydrofluoric acid using an anion exchange membrane, comprising the following steps: adding a flocculant to a fluorosilicic acid-hydrofluoric acid mixture, aging it, then adding a desulfurizing agent to carry out a desulfurization reaction to obtain a mixed solution, adding the mixed solution to the feed side of an anion exchange membrane for membrane separation, and obtaining a hydrofluoric acid solution with a mass concentration of 2-30% on the clear water side after separation. This invention uses a flocculant to rapidly settle solids such as sodium fluorosilicate and potassium fluorosilicate in the fluorosilicic acid-hydrofluoric acid mixture, uses a desulfurizing agent to remove sulfuric acid, and then uses an anion exchange membrane to effectively separate fluorosilicic acid and hydrofluoric acid in the fluorosilicic acid-hydrofluoric acid mixed solution. The hydrofluoric acid separated by membrane separation has high purity and high output value, increases the utilization rate of by-product hydrofluoric acid, and reduces costs.

The application belongs to the field of micro-nano photonics and infrared sensing, and relates to an infrared broadband absorption metasurface structure. A structure of metal layer-dielectric layer-metal layer is adopted, the upper and lower metal layers adopt platinum, the dielectric layer uses traditional material silicon, and array arrangement is realized by combining different size sub-units, an infrared broadband absorption metasurface based on a square bevel structure is designed, and an average absorption rate of more than 60% in the 8-13um atmospheric window band is realized. The bottom metal and the dielectric layer are uniform layer structures, and the top metal layer adopts a square bevel of one angle, the ratio of the bevel to the square side length is related to the absorption wavelength. The application regulates the light field based on micro-nano structure parameter change, has good wavelength selectivity and modulation performance, the selected material has good chemical stability, and has practicability and process compatibility.

The invention discloses an epoxy resin coating based on a fluorine-containing alternating polymer and a preparation method thereof, and the preparation method comprises the following steps: carrying out polymerization reaction on alpha, omega-non-conjugated diene containing a benzene ring structure and alpha, omega-diiodo perfluoroalkane in the presence of a catalyst and an organic solvent to obtain the fluorine-containing alternating polymer; the surface of a base material is coated with a composite coating obtained by dispersing the fluorine-containing alternating polymer, epoxy resin, a curing agent and auxiliaries in a solvent, and the epoxy resin coating based on the fluorine-containing alternating polymer is obtained after curing treatment. According to the invention, the excellent strong acid resistance and strong gamma ray irradiation resistance of the coating can be synchronously realized through the single-component modifier (fluorine-containing alternating polymer), meanwhile, the mechanical property of the coating is guaranteed, and the service cycle of the coating is remarkably prolonged.

This application provides a *Hansophila barley* 3CC20 strain, its preparation method, and its applications. The *Hansophila barley* 3CC20 strain has the accession number CGMCC28442. A bacterial suspension or starter culture is prepared using *Hansophila barley* 3CC20. The suspension or starter culture is then applied to meat pieces or ham at an inoculation rate of 3% or 5% of the meat weight, and fermented in a constant temperature and humidity incubator for a predetermined time. This application enables the extraction of *Hansophila barley* 3CC20 from the surface and shallow layers near the surface of fermented meat products. Furthermore, *Hansophila barley* 3CC20 exhibits high salt tolerance, nitrate tolerance, acid tolerance, strong acid production capacity, and strong antioxidant properties. *Hansophila barley* 3CC20 promotes meat product fermentation, shortens the meat product production cycle, ensures the hygiene and safety of meat products, and maintains the original unique flavor of fermented meat products.

The utility model discloses an atomizing core, an atomizer and an electronic atomizing device. Belongs to the technical field of aerosol generation. According to the atomizing core, at least part of the fixing base is arranged in the atomizing pipe, so that the pins and the heating body are limited and fixed, the heating body is prevented from loosening, the fixing base is made of the ceramic material of the porous structure, and the fixing base has the advantages of being good in acid resistance, alkali corrosion resistance, high temperature resistance and the like; therefore, the pins can be stably limited and fixed by the fixing seat, and harmful substances cannot be released due to the adhesion of aerosol or the influence of high temperature. Besides, the adsorption area of the aerosol can be increased by utilizing the large surface area of the porous ceramic due to the high porosity, the risk that the aerosol diffuses towards the battery rod in the direction far away from the suction nozzle is reduced, condensate formed after the aerosol is cooled is effectively latched, and the aerosol adsorption effect is improved. Therefore, the risk that the condensate flows to the control module and the power module is reduced.