8 results about "Diphosphorus" patented technology

The invention discloses flame-retardant electrical epoxy resin and a preparation method thereof in the field of epoxy resin. The flame-retardant electrical epoxy resin is prepared from the following components in parts by weight: 70 to 80 parts of bisphenol F epoxy resin, 20 to 30 parts of alicyclic epoxy resin, 20 to 40 parts of benzoxazine resin monomer, 50 to 70 parts of curing agent and 0.5 to 1.5 parts of curing accelerator. Through the functionalized benzoxazine resin monomer containing the diphosphorus structure, optimization of epoxy resin formula components and improvement of a preparation process, synergistic improvement of flame retardance, electrical insulation performance, heat resistance and mechanical performance is achieved.

The application discloses a preparation method and system of sodium difluorophosphate. The preparation method of sodium difluorophosphate comprises the following steps: S100, in a water-free or low-water environment, a solid-phase reaction is generated between diphosphorus pentoxide and ammonium fluoride to obtain an ammonium difluorophosphate intermediate, and volatile substances generated in the reaction process are removed and recovered; S200, in a water-free organic solvent, the ammonium difluorophosphate intermediate obtained in the step S100 is reacted with a sodium salt to obtain sodium difluorophosphate. The preparation method of sodium difluorophosphate provided by the application uses diphosphorus pentoxide and ammonium fluoride as reaction raw materials to obtain an ammonium difluorophosphate intermediate, and then reacts to obtain sodium difluorophosphate. The obtained sodium difluorophosphate has high purity and few impurities. The preparation method of sodium difluorophosphate has the advantages of cheap and easily obtained raw materials, stable chemical properties, few by-products generated in the reaction, and easy recovery, and is a green and safe preparation method of sodium difluorophosphate.

The present application relates to big data analysis technical field, specifically to a kind of mineral fertilizer production quality control method based on big data, comprising the following steps: reading phosphorus ore diphosphorus pentoxide content and potassium ore impurity calcium magnesium content, generating incoming material quality correlation coefficient set, the numerical values in the incoming material quality correlation coefficient set are weighted combination mapping, and incoming material comprehensive characteristic parameter matrix is generated.The present application introduces finished product granulation pulverization rate, acid-base neutralization consumption determination value into the inversion process of significant dynamic threshold, so that front-end raw material fluctuation and middle section operation fluctuation can accept the reverse check of end quality boundary, thereby obtaining stronger quality causal through capability, abnormal positioning capability and interception specificity, which can not only compress the path length of raw material difference transmission to finished product defect, but also reduce the misjudgment risk caused by empirical threshold, and can also enhance the identification accuracy of batch fluctuation, working condition drift and quality instability precursor.

There is provided a diphosphorus pentasulfide composition according to the present embodiment, in which a degree of crystallinity calculated from a spectrum obtained by X-ray diffraction using a CuKa ray as a ray source is equal to or more than 40% and equal to or less than 80%, in a DSC curve of the diphosphorus pentasulfide composition obtained by measurement using a differential scanning calorimeter under conditions of a start temperature of 25°C, a measurement temperature range of equal to or more than 30°C and equal to or less than 350°C, a temperature rising rate of 5°C / min, and an argon atmosphere of 100 ml / min, an endothermic peak is observed in a temperature range of equal to or more than 280°C and equal to or less than 300°C, and a heat of fusion of the endothermic peak is equal to or more than 60 J / g and equal to or less than 100 J / g.

The invention belongs to the technical field of organic synthesis, and particularly relates to a diphosphine oxide compound, a photochemical synthesis method of the diphosphine oxide compound and application of the diphosphine oxide compound in flame retardance and aging resistance of resin. The diphosphine oxide compound can be used as a flame retardant, and the polyphosphine oxide compound prepared from the diphosphine oxide compound can be used as an anti-aging agent. The diphosphorus oxide compound disclosed by the invention can well realize flame retardance of various high polymer materials including polyurethane and epoxy resin. The poly (diphosphorus oxide) compound disclosed by the invention shows relatively good anti-aging performance in a polyurethane material.

The present application relates to the technical field of organic phase change material, and more particularly to an intrinsic flame-retardant solid-solid phase change material, a preparation method thereof, a battery module and application thereof.The preparation raw material of the intrinsic flame-retardant solid-solid phase change material comprises a boron phosphate ester of a phase change substance with a hydroxyl group, expanded graphite, an amino-containing flame retardant and an isocyanate compound; and the preparation raw material of the boron phosphate ester of the phase change substance with a hydroxyl group comprises a phase change substance with a hydroxyl group, boric acid and diphosphorus pentoxide.The intrinsic flame-retardant solid-solid phase change material has the advantages of flame retardation, mechanics and thermal stability.

The invention relates to a preparation method of a lithium-containing sulfide, lithium thiophosphate and a sulfide solid electrolyte. The preparation method comprises the following steps: providing a first raw material containing liquid phosphorus pentasulfide and / or liquid sulfur and a second raw material containing a lithium element; wherein the second raw material containing the lithium element comprises lithium sulfide powder or liquid lithium; in an inert gas atmosphere, the first raw material and the second raw material are contacted and react in a reactor; the reaction temperature ranges from 280 DEG C to 500 DEG C. According to the method, the liquid phosphorus pentasulfide and the second raw material containing the lithium element are contacted and react at a relatively low temperature, so that the problem of low purity possibly caused by a grinding process is avoided, the lithium-containing sulfide with high purity and controllable particle size can be obtained through rapid, continuous and large-scale production, and the production cost is reduced.

To provide a novel diphosphorus pentasulfide composition that is useful for the production of sulfide-based inorganic solid electrolyte material.SOLUTION: The diphosphorus pentasulfide composition of the present embodiment has a crystallinity degree calculated from a spectrum obtained by X-ray diffraction using CuKα ray as a radiation source, of 40% or more and 80% or less, and has an endothermic peak observed in a temperature region of 280°C or higher and 300°C or lower in a DSC curve of the diphosphorus pentasulfide composition obtained by measurement using a differential scanning calorimeter under the conditions of a starting temperature of 25°C, a measurement temperature range of 30 to 350°C, a temperature increasing rate of 5°C / min, and an argon atmosphere of 100 ml / min, and the amount of heat of fusion for the endothermic peak is 60 J / g or more and 100 J / g or less.SELECTED DRAWING: Figure 2