12 results about "Stannous sulfate" patented technology

The invention provides a deplating solution. The deplating solution comprises the following components in percentage by weight: 10%-30% of sulfuric acid, 0.5%-1.5% of stannous mono-sulphate, 0.5%-2.5% of sodium sulfate, 0.5%-2.5% of a complexing agent, 0.1%-0.5% of an antioxidant, 1%-3% of a copper protection agent, 0.1%-0.5% of an additive and the balance of water, wherein the complexing agent is any one or two of sulfamic acid, methanesulfonic acid, phenolsulfonic acid and citric acid; the antioxidant is any one of resorcinol, hydroquinone and ascorbic acid; the copper protection agent is a core-shell structure corrosion inhibition microsphere, the core-shell structure corrosion inhibition microsphere takes hollow silicon dioxide as a core, the surface of the core-shell structure corrosion inhibition microsphere is grafted with benzotriazole, the outer layer of the core-shell structure corrosion inhibition microsphere is coated with a layer of pH sensitive type polymethylacrylic acid hydrogel shell, and the particle size is controlled to be 5-20 microns; the additive is any one of polyethylene glycol and gelatin. By optimizing the formula of the deplating solution and especially upgrading the copper protection agent system, efficient and lossless deplating of the tin-containing plating layer is achieved, meanwhile, the tin and copper recovery purity is improved, and the service life of the deplating solution is prolonged.

The invention discloses a raspberry structure Pd-Sn-O / Pd-Sn composite material, which is obtained by taking stannous mono-sulphate and palladium chloride as raw materials through hydrothermal reaction and calcination, the components are PdO, SnO2 and Pd2Sn, the microstructure is a raspberry structure, and the size of a single nanoparticle is 15-20 nm. The preparation method comprises the following steps: 1, preparing Pd / Sn-MOF; and 2, synthesis of PdO / SnO2 / Pd2Sn is carried out. A gas sensor based on Pd-Sn-O / Pd-Sn is characterized in that under the conditions that the test temperature is 77.32 DEG C and the test humidity is 5%, the response rate to 2000 ppm H2 is 25000-30000%, the response time is 1-2 s, and the recovery time is 180-190 s; the detection gases are respectively H2, NO2, CO, NH3, H2S and CH4; under the condition that the concentration of the tested gas is the same, the selectivity to H2 is extremely high under the condition that the concentration of the tested gas is 1000 ppm, and the response rate of 1000 ppm H2 is 7000-8000%; according to the invention, under the condition that the humidity is 0-90%, the response rate to H2 is achieved, that is, the humidity resistance is achieved, and under the condition that the humidity is 90%, the response rate to H2 reaches 5000-6000%.

The invention belongs to the technical field of preparation of storage batteries, and particularly relates to a formula of a storage battery positive electrode lead paste. Comprising 800-1000 parts of lead powder, 1-5 parts of sodium antimonate, 0.5-3 parts of stannous mono-sulphate, 1-5 parts of graphite and 1-5 parts of conductive fibers. Wherein the sodium antimonate is the mass fraction of the sodium antimonate in the sodium antimonate aqueous solution, and the stannous sulfate is the mass fraction of the stannous sulfate in the stannous sulfate dilute sulfuric acid solution. According to the storage battery positive electrode lead paste disclosed by the invention, by using the components, in the preparation process, through a formula and a preparation method of liquid components, a specific positive electrode additive combination is adopted, and the dosage of the liquid components is controlled within a certain range, so that the prepared lead paste is uniform in texture and has good uniformity; the argillization of the positive lead plaster is delayed; and the discharge capacity and the cycle life of the battery are improved.

This invention discloses a positive electrode paste for lead-acid batteries with high cycle stability and its preparation method, belonging to the field of electrochemical energy storage technology. Rice husk ash is acid-treated to obtain a wet filter cake. The wet filter cake is refluxed with silane coupling agent KH-550 to obtain functionalized rice husk ash. The functionalized rice husk ash, pyrrole, and ammonium persulfate are mixed and stirred to obtain a composite conductive agent. Aniline, o-aminobenzoic acid, and ammonium persulfate are mixed and stirred to obtain a conductive copolymer. The conductive copolymer is mixed with N-methylpyrrolidone to obtain a dispersion, and glycerol is added and stirred to obtain a modified precursor solution. Lead powder, mixed conductive agent, polypropylene short fibers, stannous sulfate, sulfuric acid solution, deionized water, and the precursor solution are mixed to obtain the positive electrode paste. This method improves the structural stability and electronic conductivity of the positive electrode active material, effectively inhibits the shedding of active material and interface peeling during cycling, and extends the cycle life of the battery under high-rate partial charge conditions.

The application discloses a kind of chemical plating black nickel concentrated solution, including concentrated solution A, concentrated solution B and concentrated solution C, concentrated solution A includes nickel sulfate, stannous sulfate, zinc sulfate, sodium hypophosphite, sodium citrate, sodium acetate, sodium lactate, sulfur-containing amino acid, stabilizer, ammonia and deionized water, concentrated solution B includes sodium hypophosphite, zinc sulfate, sodium acetate, sodium lactate, stabilizer and deionized water, concentrated solution C includes nickel sulfate, stannous sulfate, sodium citrate, sulfur-containing amino acid, ammonia and deionized water.The application also discloses its preparation method, plating method and application.The black nickel layer prepared from the chemical plating black nickel concentrated solution of the application not only has excellent blackening effect and luster, but also has excellent wear resistance, corrosion resistance and bonding force when directly contacting with metal substrate.The chemical plating bath has long service life and self-regulating control of pH value by continuous supplementing, and the plating speed is stable during the whole plating process.

The application discloses a preparation method of mesoporous silver oxide-tin dioxide nanosphere gas-sensitive material and application thereof, and comprises the following steps: taking tannic acid as a complexing agent and a reducing agent, taking stannous sulfate and silver nitrate as metal precursors, and preparing the mesoporous silver oxide-tin dioxide nanosphere gas-sensitive material through one-step hydrothermal method. The mesoporous silver oxide-tin dioxide nanosphere gas-sensitive material prepared through the method can detect formaldehyde gas under low-temperature conditions.

The invention discloses positive lead paste of a lead-acid storage battery for long-service-life power, a preparation method and application. The invention provides positive lead paste of a lead-acid storage battery for long-life power. The positive lead paste comprises the following components in parts by weight: 80-85 parts of lead powder; 5-10 parts of sulfuric acid; 8 to 12 parts of pure water; 0.1 to 0.15 part of graphite; 0.08 to 0.1 part of short fiber; 0.08 to 0.1 part of antimony trioxide; 0.1 to 0.12 part of stannous mono-sulphate; 0.05 to 0.1 part of bismuth trioxide; and 0.05 to 0.1 part of rubidium hydroxide. Bismuth trioxide and rubidium hydroxide are added into a conventional lead paste formula, so that the binding force between active substances and a grid and the binding force between the active substances are improved, and the cycle life of the battery is further prolonged.

This invention discloses an air-circulating drying device for stannous sulfate, comprising a base, a support frame on the base, and a drying chamber mounted on the support frame. The drying chamber has openings at both the top and bottom. A filter cover is connected to the top opening of the drying chamber, and a horizontally movable material box is connected to the bottom opening of the drying chamber. A moving mechanism for moving the material box is provided at the bottom of the material box. A guide mechanism cooperating with the moving mechanism is provided on the base. A hot air blower and a dehydration tank are also provided on the base. A circulation pipe connects the dehydration tank and the filter cover, and a solenoid valve is installed in the circulation pipe. A Y-shaped pipe connects to the air inlet of the hot air blower. This invention has a reasonable structural design. The support frame can move to the bottom of the drying chamber with the guide block. After the electric push rod is activated, the material box and the drying chamber are connected. Hot air is delivered to the air duct by the hot air blower. The material is lifted by the angle steel and falls, allowing it to contact the hot air for drying.

The invention relates to a method for optimizing stannous sulfate crystallization by actively regulating and controlling cavitation bubble dynamic behaviors through cooperation of ultrasound and a negative pressure field, and belongs to the technical field of inorganic salt crystallization control. In order to solve the problems that in the prior art, ultrasonic cavitation is difficult to regulate and control, and explosive nucleation is prone to occurring in traditional negative pressure evaporation, an optimized crystallization mechanism of cavitation threshold regulation and bubble optimization regulation is adopted, the cavitation threshold of liquid is remarkably reduced by constructing a negative pressure environment, a controlled cavitation bubble group is generated through induction of low-power-density ultrasonic waves, and the cavitation effect of the liquid is improved. The two types of cavitation bubbles are precisely regulated and controlled, the steady-state cavitation bubbles are used as heterogeneous nucleation sites, nucleation energy barriers are reduced, and crystals are induced to grow orderly; and micro-jet generated by collapse of transient cavitation bubbles is utilized to strengthen mass transfer and scatter soft aggregates. According to the method, the contradiction between thermodynamics and dynamics in the crystallization process is solved through a physical field coupling means, crystal agglomeration acceleration is effectively inhibited, and the stannous sulfate product which is narrow in particle size distribution, high in density and regular in morphology is prepared.

The invention discloses a parking air conditioner battery positive electrode lead plaster with long low-voltage charging cycle life and a preparation method, the positive electrode lead plaster comprises the following components in parts by weight: 70-92 parts of lead powder, 0.06-0.15 part of antimony trioxide, 0.08-0.2 part of stannous mono-sulphate, 0.06-0.12 part of ultra-strong short fiber, 0.1-0.20 part of graphite, 0.02-0.12 part of single-wall carbon nano-tube, 6-10 parts of pure water and 5.8-9.8 parts of dilute sulphuric acid, the lead powder contains 72-76 wt% of PbO, the size of the ultra-strong short fiber is 2-5mm, the size of the pure water is 2-5mm, and the size of the pure water is 2-5mm. The density of the dilute sulfuric acid is 1.25-1.5 g / cm < 3 The preparation method comprises the steps of composite additive preparation, lead powder premixing, acid mixing and paste mixing, the acid spraying time is controlled to be 18-22 min, the maximum paste mixing temperature is 70-80 DEG C, and the paste discharging temperature is lower than 50 DEG C. A high-efficiency conductive network is constructed through synergistic modification of core components, sulfation and electrolyte layering are inhibited, the cycle life of the battery under the parking working condition exceeds 300 times and is prolonged by 50% or above compared with that of a traditional product, the formula process is adaptive to an existing production line, the yield is high, and the battery is suitable for parking air conditioners and other low-voltage charging scenes and has important practical value and popularization significance.

The invention relates to the technical field of metal powder metallurgy, and discloses a production method for low-apparent-density iron-copper-tin-cobalt alloy powder, which can effectively reduce the cost and realize controllable production. The production method of the low-apparent-density iron-copper-tin-cobalt alloy powder comprises the following steps: S1, selecting low-apparent-density iron powder as a precursor, feeding the precursor into a reaction kettle in which an acid solution is added, and carrying out surface pretreatment to prepare a metal core; s2, the prepared copper salt solution is guided into a reaction kettle with the surface pretreated to be subjected to copper metal replacement coating; s3, on the basis of the copper-coated iron powder, a stannous sulfate solution and a cobaltous sulfate solution are introduced, tin and cobalt are deposited through the replacement effect, and multi-component composite powder is formed; and S4, washing and drying the completely coated product to obtain the low-apparent-density copper-iron-tin-cobalt pre-alloyed powder. The production method of the low-apparent-density iron-copper-tin-cobalt alloy powder is simple and controllable in process, and the requirement of large-scale industrial production can be well met.