30 results about "Fluoroantimonic acid" patented technology

A phosphor for converting ultraviolet light or blue light emitted from a light emitting element into a visible white radiation having a high level of color rendering properties, containing a light emitting component prepared from a solid system of an alkaline earth metal antimonate and a system derived from the solid system and exhibiting intrinsic photoemission, such as a fluoroantimonate, a light emitting component prepared from a manganese(IV)-activated antimonate, a titanate, silicate-germanate, and an aluminate, a light emitting component prepared from a europium-activated silicate-germanate or from a system containing a sensitizer selected from a group consisting of europium (II) and manganese (II) as a secondary activator and having an orange color or a dark red color in the spectrum range over 600 nm, or a light emitting component composed of a mixture of eight or less light emitting components having different emission bands and brought to a state of continuous emission of about 380 to 780 nm exhibiting a color temperature of about 10,000 to 6,500 K and a color temperature of about 3,000 to 2,000 K by virtue of the superposition of the light emitting bands.

The present invention relates to a polycarboxylic acid cement grinding aid production method, which comprises: 1, adding maleic anhydride, ethylene glycol, polyethylene glycol, allyl polyethylene glycol, methacrylic acid, a catalyst benzenesulfonic acid, a polymerization inhibitor hydroquinone and an initiator benzoyl peroxide to a reaction kettle, stirring, heating to a temperature of 65-75 DEG C so as to carry out an esterification reaction, maintaining the reaction temperature for 2.5-3 h, and heating to a temperature of 100-120 DEG C so as to carry out a polymerization reaction to obtain a polycarboxylic acid cement grinding aid; and 2, after completing the reaction, adding sulfamic acid and a catalyst fluoroantimonic acid to obtain the modified polycarboxylic acid cement grinding aid. According to the present invention, the efficient polycarboxylic acid cement grinding aid function controlled design method is provided, and the grafting density of the short and long side chains and the molecular weight of the long side chains are adjusted so as to achieve controllability of the key parameters of the cement particle dispersion process and the cement hydration process, achieve the function compounding, and ensure the compatibility of the cement grinding aid and the concrete admixture.

The invention discloses a novel fluorocyclopentenone preparation method and a product thereof. The novel fluorocyclopentenone preparation method is characterized by comprising the following step: methyl tert-butyl ether, enynic ester, gold (acetonitrile)[(2-biphenyl)di-tert-butylphosphine] hexafluoroantimonate (I) and N-fluorobenzenesulfonimide are added to react, so that fluorocyclopentenone is obtained. The novel method for preparing a fluorocyclopentenone compound which is provided by the invention ensures that an enynic ester compound can be converted into the fluorocyclopentenone compound. The whole reaction is carried out under normal temperature and normal pressure, conditions are mild, and energy consumption is low. The whole reaction is carried out by utilizing a one-pot method, operation is easy, yield is high, and the purity of the product is 98 percent or more. The reaction substrate range is wide, and not only the simple enynic ester compound but also complex compounds containing natural product groups are applicable. The developed fluorocyclopentenone compound has potential bioactivity, and can become a drug by subsequent testing or modification.

The invention relates to the field of detection pretreatment, and in particular relates to a treatment method using flouroantimonic acid for digestion of trace impurity elements contained in high-purity chromic oxide. After the chromic oxide is digested with the high-purity flouroantimonic acid, impurities are released from crystal lattices and boundaries, non-volatile impurities are retained after high-temperature volatilization of fluorine and antimony, and non-antimony and non-chromium elements are quantified after reconstitution with nitric acid. The method has an obvious digestion effecton the chromic oxide, has a good enrichment effect on the contained impurities, facilitates use ICP-MS or ICP-AES detection, improves the accuracy of instrument detection results and shortens the detection time.

The invention discloses a chromium-free passivation method for zinc powder. The preparation method comprises the following steps: adding a dispersing aid universal for water and oil into a water-soluble organic solvent, and uniformly stirring; adding zinc powder into the uniformly mixed medium, and uniformly stirring; and adding deionized water, a molybdenum-containing compound and silver hexafluoroantimonate, and uniformly stirring to obtain the passivated water-based zinc paste. According to a traditional zinc powder passivation method, zinc powder can be completely wrapped, so that the zinc powder loses the effect of an anti-rust pigment. According to the chromium-free passivation method for the zinc powder, the zinc powder can be stably stored in water for more than 6 months, and the electrochemical protection function of the zinc powder is not lost.

The invention relates to a production process of a curing agent for yarn impregnation. The production process is characterized by specifically comprising the following steps: S1, preparing sodium pyroantimonate; S2, preparing hexafluoroantimonic acid; S3, preparing a silver hexafluoroantimonate mother solution; S4, concentrating, cooling and crystallizing the silver hexafluoroantimonate mother liquor; and S5, recrystallizing and purifying the crude silver hexafluoroantimonate crystal. Antimonous oxide is mixed with an acetic acid solution containing hydrogen fluoride, and compared with a method of mixing antimonous oxide with a hydrofluoric acid aqueous solution or anhydrous hydrofluoric acid, the process has the advantages of mild reaction conditions, simple and easily available raw materials, low equipment requirements, high hexafluoroantimonic acid generation rate, fewer impurities and higher silver hexafluoroantimonate product yield. Hexafluoroantimonic acid reacts with silver carbonate to generate the silver hexafluoroantimonate mother solution, and then silver hexafluoroantimonate is prepared from sodium pyroantimonate and silver carbonate in a hydrogen fluoride aqueous solution in one step. The method has the advantages of mild reaction conditions, low raw material price, small environmental pollution and high impurity removal rate, and the purity of the finally obtainedproduct is high and reaches 99% or above.

The invention relates to a production process of a cationic curing agent. The production process is characterized by specifically comprising the following steps: S1, preparing sodium pyroantimonate; S2, preparing hexafluoroantimonic acid; S3, preparing a silver hexafluoroantimonate mother solution; S4, concentrating, cooling and crystallizing the silver hexafluoroantimonate mother solution; and S5, recrystallizing and purifying coarse silver hexafluoroantimonate crystals. According to the present invention, the mixing of the antimony trioxide and a hydrogen fluoride-containing acetic acid solution has advantages of mild reaction condition, simple and easily available raw materials, low equipment requirement, high generation rate of hexafluoroantimonic acid, less impurity content, and high yield of the silver hexafluoroantimonate product compared with the mixing of antimony trioxide and a hydrofluoric acid aqueous solution or anhydrous hydrofluoric acid. Hexafluoroantimonic acid reacts with silver carbonate to generate a silver hexafluoroantimonate mother solution; and then silver hexafluoroantimonate is prepared from sodium pyroantimonate and silver carbonate in a hydrogen fluoride aqueous solution in one step. The method is mild in reaction condition, low in raw material price, small in environmental pollution and high in impurity removal rate, and the purity of the finally obtained product is high and reaches 99% or above.

The invention discloses a trivalent chromium ion doped fluoroantimonate near-infrared fluorescent material and a preparation method thereof, and the preparation method comprises the following steps: dissolving a Sb source and a Cr source in an HF solution, stirring until the Sb source and the Cr source are dissolved, then adding a Na source, and continuously stirring to form a mixed solution; loading the mixed solution into reaction equipment for reaction, and washing and drying to obtain the Cr < 3 + > doped fluoroantimonate near-infrared fluorescent material, the chemical composition of the Cr < 3 + > doped fluoroantimonate near-infrared fluorescent material is NaSbF4: xCr < 3 + >, wherein x is equal to 0.5-5%. The Cr < 3 + >-doped fluoroantimonate near-infrared fluorescent material provided by the invention is high in fluorescence quantum efficiency and absorption efficiency, simple in preparation method and suitable for large-scale industrial production.