15results about How to "No generation" patented technology

The invention discloses a carbon dot corrosion inhibitor with excellent corrosion inhibition and tracing performance, a preparation method and application, and relates to the technical field of corrosion inhibition of metal materials. The technical problems that in the prior art, a carbon dot corrosion inhibitor is prone to aggregation and instability in a high-temperature and strong-acid environment, and application is single are solved. The method comprises the following steps: firstly, taking citric acid and propargyl-PEG2-amine as raw materials, and dissolving the raw materials in deionized water to obtain a mixed solution; the mixed solution is placed in a high-pressure reaction kettle to be subjected to a hydrothermal reaction, and citric acid carbon dots modified by propargyl-PEG2-amine are prepared; sequentially carrying out centrifugation, dialysis and freeze drying treatment on the citric acid carbon dots modified by the propargyl-PEG2-amine, so as to obtain the citric acid carbon dots modified by the propargyl-PEG2-amine. The prepared carbon dot corrosion inhibitor can be used as a corrosion inhibition material in a high-temperature-resistant strong-acid environment, and can also be used for in-situ monitoring of dichromate ions in industrial wastewater and in-situ monitoring of iron ions and ferrous ions in underground water, surface water and drinking water so as to judge whether the content of the iron ions and the ferrous ions exceeds the standard or not.

This invention provides a Cu-supported Y molecular sieve catalyst, its preparation method and application, and a method for preparing dimethyl carbonate using carbon dioxide. The method for preparing dimethyl carbonate using carbon dioxide includes: reacting carbon dioxide and dimethyl ether in the presence of a copper-containing catalyst to produce dimethyl carbonate; the copper-containing catalyst includes a Y molecular sieve and copper supported on the Y molecular sieve. This invention uses a copper-supported Y molecular sieve to catalyze the reaction of dimethyl ether with carbon dioxide. The reaction conditions are mild, the reaction product contains only dimethyl carbonate, with no byproducts generated, achieving 100% atom economy. It utilizes the greenhouse gas CO2, reducing environmental pollution. Furthermore, since no water byproduct is generated in the reaction, the adverse effects of water on catalyst activity and dimethyl carbonate selectivity are effectively avoided, significantly improving the yield of dimethyl carbonate. The operation is simple, the process conditions are mild, reducing costs and improving industrial production efficiency.

This invention discloses a hydrogen-assisted rechargeable battery method for hydrogen storage and production, belonging to the field of hydrogen energy storage and electrochemical energy storage technology. The method includes four core steps: battery assembly, circulating electrolyte supply, charging for hydrogen storage, and discharging for hydrogen production. During charging, hydrogen-containing gas is introduced into the cathode, where a hydroxide reaction occurs, and metal ion reduction and deposition occur at the anode, storing hydrogen energy as a metallic element in a solid state under normal pressure. During discharging, a metal oxidation and dissolution reaction occurs at the anode, and a hydrogen evolution reaction occurs at the cathode, generating hydrogen gas in situ and releasing hydrogen energy on demand. This invention eliminates the oxygen evolution reaction of traditional water electrolysis, using hydroxide coupled with metal oxidation-reduction to achieve hydrogen energy storage and release. It offers high storage safety, low reaction overpotential, high energy efficiency, and good cycle reversibility, solving the problems of poor safety, high energy consumption, and low energy efficiency in existing hydrogen storage technologies. It can be widely applied to renewable energy hydrogen production, large-scale hydrogen energy storage, and distributed hydrogen energy supply scenarios.

The invention relates to the technical field of chemical synthesis, and particularly discloses a preparation method of electrolyte salt lithium difluoro (oxalato) borate for a lithium ion battery. The invention discloses a preparation method of lithium difluoro (oxalato) borate, which comprises the following steps: mixing oxalic acid, lithium fluoride, boric acid, lithium hydroxide, a boron trifluoride complex and an organic solvent, heating for reaction, and filtering to obtain a reaction solution; the reaction temperature is 50-120 DEG C, and the reaction time is 4-48 hours; carrying out vacuum concentration on the reaction liquid until white solids are separated out, cooling, adding a poor solvent, crystallizing and filtering to obtain a wet product; and performing vacuum drying to obtain a target product. The novel preparation method of lithium difluoro (oxalato) borate, provided by the invention, is simple, high in product conversion rate, free of generation of other impurities and environment-friendly.

This invention discloses a process for the recovery and resource utilization of wastewater and waste gas generated during silver powder production. It effectively recovers and treats four types of wastewater generated during silver powder production: organic-free ammonium nitrate wastewater, organic-free sodium nitrate wastewater, sodium nitrate wastewater containing organic matter, and ammonium nitrate wastewater containing both organic matter and sodium nitrate. The invention effectively recovers and treats all four main types of wastewater and two types of waste gas generated during silver powder production, converting them all into the necessary production materials such as ammonia, concentrated nitric acid, dilute nitric acid, and sodium hydroxide, thus achieving complete recovery and utilization of all wastewater and waste gas.

The invention relates to a method for preparing high-purity silicon tetrafluoride by dissociating fluosilicate through low-temperature plasma. The method comprises the following steps: crushing fluosilicate in a crusher, and heating and dewatering in a vibrated fluidized bed; the treated fluosilicate powder is conveyed to a plasma reactor through carrier gas to be dissociated to generate silicon tetrafluoride; and finally, silicon tetrafluoride generated by reaction enters a first-stage condenser to separate solid metal fluoride, then enters a cold hydrazine to be cooled for first-stage impurity removal, and then enters an adsorption tower for second-stage impurity removal, so that high-purity silicon tetrafluoride is obtained. The fluosilicate is dissociated by adopting a low-temperature plasma technology, so that high-purity silicon tetrafluoride is efficiently prepared under a low-temperature condition; meanwhile, the one-step method is short in conversion process, fluorine-containing waste is not generated, a simple purification step is combined, the production cost and the environment-friendly burden are reduced, the raw material adaptability is high, and operation is easy.

This invention discloses a microwave-tunable composite ceramic material and its preparation method, belonging to the technical field of microwave ceramic materials. The material is composed of Ba... 1‑x Sr x It consists of three phases: TiO3, Li2Mg3TiO6, and Mg2SiO4, among which Ba 1‑x Sr x The mass percentage of TiO3 is 30%–95%, and the value of x ranges from 0.3 to 0.7; the mass percentage of Li2Mg3TiO6 is 3%–60%, with the remainder being Mg2SiO4. This material has a moderate dielectric constant, low dielectric loss, and high tuning efficiency, combining high performance with a low sintering temperature. It can be used in microwave devices such as phase shifters, tunable filters, delay lines, oscillators, resonators, and phased array antennas.

The application discloses application of a binary aluminum-based layered double metal oxide in degradation of polycyclic aromatic hydrocarbons at low temperature, and degrades polycyclic aromatic hydrocarbons in boiler flue gas in a range of 240-300 DEG C with the binary aluminum-based layered double metal oxide as a catalyst; the content of polycyclic aromatic hydrocarbons in the boiler flue gas is 30000h ‑1 -60000h ‑1 The chemical formula of the binary aluminum-based layered double metal oxide is: wherein M is one of Cu, Mn and Co. The application is aimed at the treatment difficulty of boiler flue gas with only low concentration of PAHs but needing rapid treatment, and a binary aluminum-based layered double metal oxide is designed based on the characteristics of LDOs, which is used for efficient degradation of polycyclic aromatic hydrocarbons at low temperature and has excellent PAHs deep degradation capacity.

The invention relates to a method for degrading organic pollutants in water by utilizing nitrilotriacetic acid and divalent manganese ion reinforced ferrate, aiming at solving the problems that the ferrate is relatively low in organic pollutant degradation efficiency, low in organic pollutant removal rate and the like in an actual wastewater treatment process. The invention discloses a method for degrading organic pollutants in water by utilizing nitrilotriacetic acid and divalent manganese ion reinforced ferrate. The method comprises the following steps: 1, adjusting the pH value of wastewater containing the organic pollutants to be 7-8; 2, placing nitrilotriacetic acid in pure water, and stirring to obtain a nitrilotriacetic acid stock solution; 3, adding the nitrilotriacetic acid stock solution into the wastewater; 4, adding manganese salt into the micro-complex pollutant wastewater; and 5, adding ferrate into the manganese-containing micro-complex pollutant wastewater, and carrying out stirring reaction to degrade organic pollutants in the water. According to the method disclosed by the invention, a combination of nitrilotriacetic acid and divalent manganese is introduced into a ferrate oxidation system, so that various pollutants in water can be effectively removed, and the removal rate of the pollutants in the water reaches 90% or above within 30 minutes.

The application provides an external container inner wall cleaning structure and a cleaning method. The cleaning assembly is connected with the container. The cleaning assembly comprises: a laser light source, which is used for emitting a light beam. The emission frequency of the light beam of the laser light source is less than 1000 Hz. The energy of the light beam emitted by the laser light source ranges from 0.1 J to 100 J. A galvanometer component is used for receiving the light beam emitted by the laser light source and forming a cleaning light beam for cleaning the inner wall surface of the containing cavity. A wedge mirror assembly is arranged corresponding to the container port, so that the cleaning light beam enters the containing cavity after refraction through the wedge mirror assembly and irradiates on the inner wall surface of the containing cavity. A driving motor. The wedge mirror assembly is connected with the output shaft of the driving motor to drive the rotation of the wedge mirror assembly, so as to adjust the irradiation direction of the cleaning light beam passing through the wedge mirror assembly. The external container inner wall cleaning structure and the cleaning method solve the technical problem that the related art is difficult to clean the inner wall of the container.

The invention discloses a method for synergistically preparing a high-calcium mineral organic water-soluble fertilizer and a citrate-soluble mineral fertilizer from shellfish solid waste and agriculture and forestry biomass. Through cooperation of multi-stage activation and catalysis, the conversion activity of calcium and the quality of humic acid are remarkably improved, the process route integration degree is high, and the technicality is high. The content of water-soluble calcium in the obtained product is more than or equal to 10%, the content of humic acid is more than or equal to 30%, medium trace elements are rich, quick-acting and long-acting fertility is achieved, crop growth can be remarkably promoted, the soil aggregate structure is improved, heavy metal is passivated, crop stress resistance is enhanced, and a new way is provided for high-added-value resource utilization of the two kinds of waste.

This invention discloses a method for preparing N,N,-di(β-hydroxypropyl)benzamide. Using excess methyl benzoate as a raw material, the amino groups are fully converted to obtain a mixture of N,N-di(β-hydroxypropyl)benzamide product and acyl ester byproducts. The acyl ester byproducts in the mixture are then alcoholyzed using an alcoholysis reagent to obtain the N,N-di(β-hydroxypropyl)benzamide product. This method improves reaction selectivity and product yield, achieving a maximum yield of up to 97%.

The application discloses a graphene / TA1 composite material and a preparation method thereof, and belongs to the technical field of graphene / titanium-based composite material preparation. In order to solve the problem of the rolled high-strength plastic graphene / TA1 composite material in a high-load service environment, Sn powder, Y2O3 powder and TA1 titanium alloy powder are uniformly mixed, then the mixture is added into a ball mill tank, graphene powder is added in batches, and multiple ball milling is carried out to obtain a composite powder; a mold filled with the composite powder is placed in a sintering furnace, an axial pressure is applied to the mold, and plasma sintering treatment is carried out to obtain a sintered composite material blank; the sintered composite material blank is subjected to oxidation scale removal and round billet cutting treatment, and then is subjected to sandpaper polishing to obtain a hot rolling initial sample; and multiple pass rolling is carried out until the total reduction is 75%, and then air cooling is carried out to room temperature to obtain the graphene / TA1 composite material. The application improves the overall properties of the high-strength plastic graphene / TA1 composite material.

This invention discloses a method for preparing pyridine carboxylic acids. The method involves the oxidation of alkyl pyridines with an oxygen-containing gas under cobalt-manganese solid catalyst catalysis to obtain pyridine carboxylic acids. The reaction is preferably carried out at a temperature of 150-170℃ and a pressure of 2.5-3.5 MPa, using a small-molecule organic acid as the solvent. The preparation method is simple, exhibits excellent production performance, operates under relatively mild conditions, and causes no environmental pollution or equipment corrosion during the process, demonstrating significant industrial application prospects and value.

The application belongs to the technical field of biocatalytic synthesis of steroid drugs, and particularly relates to a dehydrogenase, a gene, an engineering bacterium and application, the amino acid sequence of the dehydrogenase is SEQ ID NO. 1 or SEQ ID NO. 2, the dehydrogenase has high dehydrogenation activity, high stereoselectivity and strong regioselectivity, and no other conformation impurities are generated; the engineering bacterium can efficiently secrete the dehydrogenase, and effectively improves the conversion efficiency of a substrate, especially for a substrate 6-methy format (11beta, 17alpha-dihydroxy-6alpha-methylpregna-1, 4-diene-3, 20-diketone), which is low in cost and has significant industrialization potential; the dehydrogenase mutant has clear physicochemical properties, and the method of whole cell catalysis is used, so that the cumbersome step of enzyme purification is omitted, and the cost is reduced and the operation is simple.