11results about How to "Short preparation process" patented technology

The application relates to the field of catalysts, and discloses a hydroisomerization catalyst, a preparation method thereof and a hydroisomerization treatment method for hydrocarbon oil, which comprises the following steps: (1) performing molding on a ZSM-48 molecular sieve precursor to obtain a carrier precursor; wherein the water content of the ZSM-48 molecular sieve precursor is not less than 15 wt% based on the mass of the ZSM-48 molecular sieve precursor; (2) performing ammonium exchange on the carrier precursor to obtain a catalyst carrier; (3) introducing an active metal component onto the catalyst carrier to obtain a hydroisomerization catalyst; wherein the active metal component is Pt and / or Pd. The hydroisomerization catalyst obtained by the above preparation method has a lower product condensation point and a higher yield in the hydroisomerization reaction of hydrocarbon oil than the product obtained by the prior art, and has a remarkable effect.

This invention provides an ion-doped calcium oxalate thermochemical heat storage material and its preparation method, the chemical formula of which is Ca. 1‑ x M x C2O4·H2O, where M is a dopant ion and x is the mole fraction of the dopant ion; M includes Mg 2+ Co 2+ Zn 2+ 、Sr 2+ One or more of the following. This invention regulates the lattice parameters, local coordination environment, defect state, and microstructure of calcium oxalate by doping with ions. While maintaining the original reversibility and cycle stability of the calcium oxalate system, it further optimizes its dehydration thermal storage temperature range, thermal response boundary, structural evolution behavior, and application compatibility materials, thereby improving the thermochemical thermal storage performance of calcium oxalate from the internal structural level.

This invention belongs to the field of lithium-ion battery technology, specifically relating to a method for predicting and evaluating the lifespan of long-life lithium-ion batteries. Take 3n lithium-ion batteries manufactured under the same conditions and test their initial capacity, internal resistance, voltage, and electrochemical impedance spectroscopy (EIS) at 25°C. Cycle the lithium-ion batteries under temperature conditions T1 / T2 / T3 / ·· / Tn, and test their EIS impedance, capacity, and internal resistance after 100, 500, 1000, and 2000 cycles until the battery reaches 80% of its initial capacity. Take 3n batteries and leave them under temperature conditions T1 / T2 / T3 / ·· / Tn only, where n is greater than 3, for 0h, 500h, 1000h, 1500h, and 2000h. During this period, measure the battery's DC internal resistance (DCR), capacity, and internal resistance (ACR). Add a logic formula for data learning calculation to fit the data. Based on the usage conditions, confirm the degree of capacity decay and impedance to determine the lifespan termination point. The default battery lifespan termination is required when the capacity decays to 70% of the nominal capacity. The method of this invention provides a lithium-ion battery life prediction method. This method has the advantages of low cost, simple equipment requirements, and short preparation steps, and has the ability to accurately evaluate the life of long-life lithium-ion batteries.

The present application relates to the field of composite fibers, in particular to a reactive thermoplastic sizing agent and a preparation method thereof. The sizing agent comprises: a reactive polyaryletherketone, the reactive polyaryletherketone has the structure shown in the following formula: wherein x+y=1, 0.5≤x≤1, the Ar is selected from one or more of phenolphthalein, bisphenol fluorene, hexafluorobisphenol derived divalent aromatic groups. The preparation method of the sizing agent is: synthesis of fluorine atom terminated polyaryletherketone prepolymer, preparation of mercapto terminated reactive polyaryletherketone, preparation of reactive thermoplastic sizing agent. The carbon fiber treated by the sizing agent has excellent heat resistance, the 5% decomposition temperature reaches 440 DEG C; the interface bonding between the polyaryletherketone matrix and the carbon fiber is significantly improved.

The application provides a long afterglow / nuclear magnetic nano probe based on APE1 amplification for miRNA-21 signal amplification, and a preparation method, the surface of the long afterglow nano particle is connected with amino modified DNA1 through an amide coupling reaction, and long afterglow nano particle-DNA1 is obtained; the surface of the magnetic nano particle is modified with amino-substituted hydroquinone (HQ-N3), then click chemistry reaction is carried out with alkyne-modified DNA2, and magnetic nano particle@HQ-N3-DNA2 is obtained; the long afterglow nano particle-DNA1 and the magnetic nano particle@HQ-N3-DNA2 are assembled through two DNA hybridizations, and the long afterglow / nuclear magnetic nano probe is obtained; the nucleotide sequence of DNA1 is CGCCAGTTGT (SEQ ID NO. 1); the nucleotide sequence of DNA2 is GCGGTCAACATCA / dSpacer / GTCTGATA. The probe can be specifically triggered by miRNA-21 in a tumor microenvironment, and signal amplification is realized through an APE1 enzyme-mediated mechanism, the high signal-to-noise ratio advantage of long afterglow imaging is combined with the deep tissue imaging capability of nuclear magnetic resonance imaging, and high-sensitivity, specificity, real-time dynamic visual monitoring of miRNA-21 is realized.

The invention relates to a preparation method of a catalytic cracking catalyst. The method comprises the following steps: carrying out contact treatment on a NaY molecular sieve and a rare earth salt solution or a mixed solution of the rare earth salt solution and an ammonium salt solution, filtering and washing to obtain preparation raw materials including the rare earth-containing NaY molecular sieve, an inorganic oxide binder and natural minerals, mixing, pulping and molding; carrying out deacidification treatment on the formed catalyst, so that the content of Cl <-> on the basis of the catalyst is reduced to be less than or equal to 1.5 wt%; and performing hydrothermal roasting treatment on the deacidified molded catalyst in an atmosphere environment in which pressure is applied externally and an aqueous solution containing an acidic substance or an alkaline substance is added externally, and removing alkali metal through ammonium exchange. According to the method, under the condition that the chlorine content in the catalyst is reduced, the damage of a large amount of released hydrochloric acid gas to a rare earth NaY molecular sieve crystal structure in the catalyst is relieved, so that the cracking performance of the catalyst is improved.

The invention discloses a K / FeS / g-C3N4 / TiO2 (at) PVDF membrane for photocatalytic oxidation, a preparation method and application, through SO2 and CO2 generated by pyrolysis of K4 [Fe (CN) 6] and K2SO3, gaps are generated in a microstructure of g-C3N4, the specific surface area is higher, adsorption of organic pollutants is enhanced, the reaction rate is increased, a FeS / g-C3N4 / TiO2 heterojunction structure is constructed, and the photocatalytic oxidation performance of the membrane is improved. And carbon defects or nitrogen defects generated by K ionization are introduced into the structure, so that stable electron channel connection and light energy absorption and conversion paths are realized, the light response efficiency is improved, the recombination rate of photo-generated electron holes is reduced, and the free radical yield is improved. The membrane material is applied to a circulating aquaculture water body treatment system, odor substances are degraded through photocatalytic oxidation, and deep purification of water is achieved.

The application discloses a preparation method of a sulfide electrolyte layer, and specifically comprises the following steps: coating a mixed slurry including a sulfide electrolyte precursor, a lithium salt, a solvent and a binder on a pole piece to obtain a pole piece with a mixed slurry coating layer; the raw material A is a sulfide electrolyte or a sulfide electrolyte precursor; and the pole piece with the mixed slurry coating layer is dried to obtain a sulfide electrolyte layer attached to the pole piece. In the application, the preparation of the sulfide electrolyte and the coating process of the sulfide electrolyte are coupled, the preparation and modification of the sulfide solid electrolyte layer are simultaneously completed by using a pole piece drying process, the electrolyte is entirely in a liquid or slurry during the process, material preparation in a glove box is not needed, the material transmission and transfer are more favorable, the difficulty and cost of completely isolating water and oxygen from the powder material are greatly reduced, the production process is short, the process flexibility is strong, and the application is more favorable for industrialization.

The invention relates to an acid-base-rich site composite hybrid structure catalyst and a preparation method and application thereof, and belongs to the technical field of polyester chemical recovery and solid catalysis. The invention provides an acid-base-rich site composite hybrid structure catalyst which comprises calcium carbonate and calcium titanate, the mass ratio of the calcium carbonate to the calcium titanate is (1-21): 9, and the catalyst is a mesoporous material with the pore diameter of 2-50 nm. The catalyst has both Lewis acid site and alkaline site and contains detectable oxygen vacancy, the mesoporous structure and the high specific surface area of the catalyst are beneficial for improving diffusion and site utilization rate of macromolecular substrates, the catalyst shows excellent alcoholysis activity to polyester materials at proper temperature, high-selectivity recovery of monomers is achieved, and the catalyst can be used for continuous reaction of a fixed bed and can be applied to industrial production. The excellent continuous use stability is realized.

This invention relates to a 1000 MPa grade low-density medium-manganese steel and its preparation method, belonging to the field of iron and steel metallurgy and metal material processing technology. The low-density medium-manganese steel is composed of the following chemical composition by mass percentage: C 0.80%~0.95%, Al 7.50%~9.30%, Mn 8.35%~12.87%, Si 0.55%~0.62%, B 0.001%~0.003%, P≤0.008%, S≤0.0012%, with the balance being Fe and unavoidable impurities. Based on Fe-Mn-Al-C series low-density medium-manganese steel, this invention optimizes the process to prepare a low-density medium-manganese steel with excellent comprehensive performance. The production cost is low, the preparation process is short, and the preparation method is simple and easy to implement. The obtained low-density medium-manganese steel not only has good elongation but also a tensile strength reaching 1000 MPa, making it suitable for the manufacture of automotive parts and further broadening its application prospects.

The invention relates to a SiC particle reinforced aluminum-based composite material and a preparation method and system thereof. The preparation system of the SiC particle reinforced aluminum matrix composite comprises a zoning temperature control smelting device, the interior of the zoning temperature control smelting device is divided into a lower zone and an upper zone in the height direction, and the lower zone and the upper zone are provided with independent temperature control units used for achieving differential temperature control of the lower zone and the upper zone; the stirring device comprises a double-layer stirring head extending into the partition temperature control smelting device, the lower section of the double-layer stirring head is arranged to be a dispersing structure for providing strong shearing force, and the upper section of the double-layer stirring head is arranged to be a reverse propelling structure for forming downward circulation; and the powder spraying device comprises a powder spraying pipe, and at least two layers of powder outlets are formed in a pipe body of the powder spraying pipe in the length direction of the pipe body and used for spraying the SiC particles into the melt from different heights. According to the preparation system, by cooperatively regulating and controlling the smelting temperature field, the stirring flow field and the particle conveying field, precise control over the microstructure of the composite material is achieved, and the material performance and the stability of the preparation process are remarkably improved.