30 results about "Thiosulfate" patented technology

Provided are: a gold plating method for achieving soft gold plating; a composition for gold plating; and a plating solution. The gold plating method is performed using a plating solution comprising: a gold sulfite salt; and at least one among thiosulfate ions and trithionic acid ions.

A polymer comprising pyridinium salt moieties, wherein the polymer has the following structure: In this structure, R1 and R6 are each N. At least a portion of R2 and R7 groups in the polymer are each negatively charged counterions selected from the group consisting of carboxylates, nitrates, nitrites, azides, metasilicates, tetraborate, perborates, boronates, oxalatob orates, metaborates, phosphorus-containing anions, halides, sulfates, SO4 -2, HSO4 -1, thiosulfate, dithionite, metabisulfite, persulfate, methanesulfonate, dioctyl sulfosuccinate, 3-sulfopropyl ethoxylate laurylphenyl ether, and combinations thereof. R3, R4, R8, R9, R11, R13, R14, R15, and R16 are each selected from the group consisting of H and groups including one or more carbon atoms. R5 and R10 are any group including one or more carbon atoms. The n is an integer from 2 to about 100,000.

The invention discloses a complex iron method desulfurization device for sulfur recovery tail gas, and relates to the technical field of complex iron method desulfurization. The system comprises a complex iron desulfurization tower, three groups of demisters are arranged at the top of the complex iron desulfurization tower, each demister is provided with a high-pressure flushing assembly, the complex iron desulfurization tower can be communicated with the three groups of demisters respectively, an air inlet pipe is arranged on the right side of the complex iron desulfurization tower, a four-way valve is arranged on the air inlet pipe, and the four-way valve is connected with the four-way valve. And the four-way valve is respectively communicated with the three groups of demisters through the three groups of air inlet guide pipes. According to the invention, three groups of demisters are used alternately, one group is used for desulfurization and normal demisting, the other group is used for removing impurities from tail gas, so that attached salt crystals (such as ammonium sulfate and thiosulfate) are softened, melted or loosened, and the last group is used for carrying out high-strength washing on the heated demisting plate, so that softened dirt and particles are thoroughly removed; the industrial problem that a complex iron type desulfurization demister is easy to block is solved.

The application discloses a method for detecting microRNA-21 by photothermal analysis. The method mixes lock-step chain functionalized gold nanoparticles, substrate chain functionalized gold nanoparticles, microRNA-21, divalent aqueous manganese salt and water to generate HRP; H2S is generated by the reaction of thiosulfate and hydrogen peroxide catalyzed by HRP, and then the etching of Prussian blue by H2S affects the photothermal performance of Prussian blue, thereby constructing the linear relationship between the concentration of microRNA-21 and temperature, and realizing the signal detection of the target microRNA-21. The method ingeniously combines the PB with the 3DDNA Walker-based signal amplification, greatly improves the sensitivity, and realizes the low-concentration and high-selectivity detection of the target.

The invention relates to a hollow high-entropy transition metal hydroxide crystal and a preparation method thereof. The preparation method comprises the following steps: providing a cuprous oxide crystal; the preparation method comprises the following steps: respectively adding a nickel salt precursor, a cobalt salt precursor, a chromium salt precursor, a manganese salt and / or iron salt precursor and cuprous oxide crystals into an ethanol / water mixed solvent to prepare uniformly dispersed suspension liquid; adding polyvinylpyrrolidone into the suspension, and fully mixing to obtain a mixed solution; and dropwise adding a reactant containing thiosulfate radicals into the mixed solution, reacting, and separating to obtain the hollow high-entropy transition metal hydroxide crystal. The method is simple in process, mild in condition, short in reaction time, low in requirement for precision of equipment and instruments, high in controllability of product morphology, good in repeatability and especially suitable for large-scale industrial production.

The present application provides a method for removing thiosulfate from a nickel sulfate solution preparation process. The method comprises the following steps: a slurrying procedure: slurrying a nickel raw material to obtain a slurry, wherein the nickel raw material comprises at least one of high-grade nickel matte, low-grade nickel matte, nickel ore concentrate, and a nickel sulfide intermediate product; an atmospheric pressure leaching procedure: performing atmospheric pressure acid leaching on the slurry to leach out at least part of the metal nickel from the nickel raw material, to obtain an atmospheric pressure leaching residue and an atmospheric pressure leaching solution; a pressurized leaching procedure: performing pressurized acid leaching on the atmospheric pressure leaching residue to leach out nickel contained in the atmospheric pressure leaching residue, to obtain a pressurized leaching residue and a pressurized leaching solution; and a first recycling procedure: performing a first recycling treatment on the pressurized leaching solution to obtain a recycled solution having a copper ion concentration of 2-40 g / L, and returning the recycled solution to the atmospheric pressure leaching procedure for mixing with the slurry for atmospheric pressure acid leaching. The method provided in embodiments of the present application can effectively separate nickel from impurities such as thiosulfate, thereby obtaining a nickel product having better quality.

A full-scale lead-free oxygen sensor comprises a shell, an electrolyte arranged in the shell, a tin anode and a catalytic electrode which are immersed in the electrolyte, and an electrolyte adsorption film is arranged between the tin anode and the catalytic electrode. The electrolyte comprises caustic alkali, carbonate, bicarbonate and thiosulfate. Due to the adoption of the alkaline electrolyte, the hydrogen evolution competitive reaction of the lead-free oxygen sensor is avoided, so that the oxygen concentration measurement accuracy of the lead-free oxygen sensor is improved.

The present application relates to a kind of gold extractant and its preparation method, application, the gold extractant is the aqueous solution containing inorganic copper salt, thiosulfate and EDDHA-Na, wherein, the molar concentration of Cu in the gold extractant is 0.005M-0.05M, S2O3 2+ Molar concentration is 0.005M-0.05M, S2O3 2‑ Molar concentration is 0.1M-1M;EDDHA-Na and water volume ratio is 1-20%.EDDHA-Na is mainly complexed with copper ion to form EDDHA-Cu complex ion, reduce the formation of copper-ammonia complex ion, thereby reducing the oxidation of thiosulfate ion, while EDDHA-Cu complex ion has catalytic effect on the dissolution of gold in thiosulfate ion solution, improve the leaching efficiency of gold.

The present invention relates to a trivalent chromium-based electrolysis bath, a process using such a bath, and a substrate coated with a chromium deposit obtained by such a process. According to the invention, the electrolysis bath comprises 1 to 2.5 mol / L of trivalent chromium, 2 to 12 mol / L of a first inorganic complexing agent in the form of chloride, fluoride, and mixtures thereof, and 1.5 to 7.5 mol / L of a second inorganic complexing agent different from the first complexing agent and selected from chloride, fluoride, sulfate, sulfite, thiosulfate, and mixtures thereof. The bath further comprises 0.001 to 0.100 mol / L of an ionic metallic additive selected from the cationic forms of iron, manganese, aluminum, and mixtures thereof. The electrolysis bath has a pH between 1.5 and 4.0 and is essentially free of organic compounds.

The application discloses a complex iron method desulfurization device for sulfur recovery tail gas and relates to the technical field of complex iron method desulfurization.The complex iron method desulfurization device comprises a complex iron desulfurization tower, the top of the complex iron desulfurization tower is provided with three groups of mist eliminators, the mist eliminators are provided with high-pressure flushing components, the complex iron desulfurization tower can be connected with the three groups of mist eliminators respectively, the right side of the complex iron desulfurization tower is provided with an air inlet pipe, a four-way valve is arranged on the air inlet pipe, and the four-way valve is connected with the three groups of mist eliminators through three groups of air inlet pipes respectively.Through the alternate use of the three groups of mist eliminators, one group carries out normal desulfurization and mist removal, another group removes impurities from the tail gas, the attached salt crystals (such as ammonium sulfate and thiosulfate) are softened, melted or become crisp, the last group carries out high-strength flushing on the heated mist removal plate, and the softened dirt and particles are completely removed, so that the industry's stubborn problem that the complex iron type desulfurization mist eliminator is prone to blockage is solved.

The invention discloses a modified coal gangue material and a preparation method and application thereof, and belongs to the technical field of material preparation and precious metal recovery. The modified coal gangue material is prepared from high-aluminum and high-silicon coal gangue and KH-580 through a solution polymerization reaction, and the material is simple in synthesis process, low in cost, economical and environmentally friendly. The modified coal gangue material has relatively high adsorption performance, excellent selectivity and good adsorption capacity on [Au (S2O3) 2] < 3->. According to the method, the thought of treating waste with waste is combined, the waste coal gangue is introduced into application of precious metal recovery, and gold in the thiosulfate gold leaching liquid can be effectively recovered with low cost.

The invention relates to a tin electroplating bath comprising tin ions; titanium ions as a reducing agent suitable for reducing tin ions to metallic tin; and at least one compound selected from the group consisting of sulfite, dithiosulfonate, thiosulfate, tetra-thiosulfonate, polythiosulfonate, pyrosulfite, sulfide, disulfide, polysulfide, elemental sulfur or mixtures thereof. The invention further discloses a method for depositing tin or tin alloys on a substrate surface. The tin electroplating bath is particularly suitable for use in the electronics and semiconductor industry.

The invention relates to the technical field of purification of intermediates in vitamin B1 production, in particular to a 2-methyl-4-amino-5-(thioformylthio) pyrimidine sodium salt crystallization process which comprises the following steps: mixing an aminopyrimidine aqueous solution with carbon disulfide, starting stirring and controlling the system temperature to be 28 DEG C; a sodium hydroxide solution with the mass fraction of 30% is dropwise added at the speed of 1.5 g / min, the pH value of the system is maintained to be 10.2 in the dropwise adding process, and heat preservation reaction is conducted for 1.5 h after dropwise adding is completed; by constructing a synergistic system of solvent selection, temperature control and reaction conditions, an impurity transfer path is effectively cut off, the extraction yield and purity of an intermediate are greatly improved, meanwhile, the content of key impurities is remarkably reduced, a guarantee is provided for high-quality production of downstream thiamine thiosulfate and thiamine nitrate, and compared with a traditional process, the method has the advantages that the cost is reduced, and the production efficiency is improved. And the product quality stability is greatly improved.

The invention discloses a flotation reagent and method for sulfur and arsenic mineral activating agent and tin concentrate reverse flotation desulfurization and dearsenification, and belongs to the technical field of mineral processing. The sulfur-arsenic mineral activating agent comprises thiosulfate, soluble lead salt and soluble copper salt, can activate arsenic-sulfur minerals such as arsenopyrite (FeAsS2), pyrite (FeS2) and pyrrhotite (Fe1-xS) in a high-selectivity mode, enhances the flotation performance of the arsenic-sulfur minerals, and is used in cooperation with a cassiterite inhibitor, a sulphide ore collecting agent and a foaming agent, so that the flotation efficiency of the arsenic-sulfur minerals is improved, and the flotation efficiency of the arsenic-sulfur minerals is improved. The method is particularly suitable for flotation removal of arsenic-sulfur minerals in the tin concentrate, the tin loss can be remarkably reduced while the tin concentrate desulfurization and dearsenification efficiency can be greatly improved, and the environmental protection pressure of subsequent smelting is effectively relieved.

This application discloses a method for catalytic wet oxidation treatment of sodium thiosulfate. The method includes: contacting a raw material containing sodium thiosulfate with a catalyst and an oxidant to undergo an oxidation reaction to obtain sodium sulfate; wherein the catalyst includes a support and an active component; the support is activated carbon; the active component includes a transition metal active element; the transition metal active element is selected from one to three of Mn, Fe, Co, Ni, and Cu. This method can achieve oxidation of more than 60% of 10000 mg / L thiosulfate, and the catalyst activity can be restored by water washing and regeneration after a decrease. The catalyst morphology remains good after 30 days of continuous operation.

The invention belongs to the technical field of environmental microorganism screening application, and particularly relates to a hydrogen sulfide oxidizing bacterium and application thereof in a desulfurization process. The invention provides a hydrogen sulfide oxidizing bacterium (Acinetobacter sp. S-10, the preservation unit is China General Microbiological Culture Collection Center, and the preservation number is CGMCC No.35086) which can be cultured in seawater and fresh water and has the characteristic of low temperature resistance, and a hydrogen sulfide oxidizing bacterium strain (Acinetobacter sp. S-10, the preservation unit is China General Microbiological Culture Collection Center, and the preservation number is CGMCC No.35086). The hydrogen sulfide oxidizing bacteria can oxidize hydrogen sulfide in low-temperature, high-salt and strong-alkali environments to produce thiosulfate, a brand new path is opened up for innovation of a biological desulfurization process technology in an extreme environment, conversion from pollutants to high-value resources is realized by directional regulation and control of sulfur metabolites, and meanwhile, the hydrogen sulfide oxidizing bacteria have a wide application prospect. The hydrogen sulfide oxidizing bacteria can grow in seawater and fresh water, and the economical efficiency of the whole treatment process is remarkably improved.

The invention discloses a concentration detection system and a concentration detection method for PCB chemical reagent preparation. The system comprises a multiband spectrum emission unit; a dynamic environment noise elimination unit; a dual-optical-path reference detection unit; a new material feature analysis module; according to the invention, through a three-level innovative architecture of characteristic spectrum dynamic capture, environmental noise collaborative suppression and intelligent algorithm decision closed loop, technical faults of a traditional method in new material adaptability and complex working condition stability are systematically solved. On one hand, novel environment-friendly reagents such as a gold thiosulfate complex and a benzotriazole derivative realize full-fingerprint concentration inversion, and a detection blind area is reduced by 80%; and on the other hand, the submicron detection precision is still maintained in a high-temperature and high-pollution harsh production line environment. And finally, the PCB chemical reagent detection is promoted to be upgraded from a single-point calibration-manual correction extensive mode to a multi-dimensional perception-autonomous evolution intelligent system, and a concentration reference guarantee is provided for high-end electronic manufacturing such as an IC (Integrated Circuit) carrier plate and a Mini LED (Light Emitting Diode).

The invention discloses application of a modified polyamine gel material in recovery of gold (I) in a thiosulfate solution, and belongs to the field of hydrometallurgy and precious metal recovery. According to the invention, a polyamine gel material with abundant cationic groups is synthesized and is used as a material for adsorbing gold (I) in a thiosulfate solution; the material prepared by the method can be used under a wide pH condition, is easy to separate from a solution, can be recycled for multiple times, has the characteristics of stable adsorption material performance and simple adsorption process flow, and can efficiently recover gold (I) in a thiosulfate solution.

The application belongs to the technical field of semiconductor materials, and discloses a method for reducing the silicon impurity concentration on the surface of an indium phosphide wafer. The method comprises the following steps: rough polishing of the indium phosphide wafer, then fine polishing of the indium phosphide wafer by using a fine polishing liquid; cleaning and drying of the indium phosphide wafer after fine polishing, and then treatment of the indium phosphide wafer by using a mixed weak acid; the fine polishing liquid comprises tripolyphosphate, thiosulfate, bicarbonate and citric acid; and the mixed weak acid comprises HF acid, NH4F and H2O2. The fine polishing liquid does not contain SiO2, and by adding citric acid in the fine polishing liquid, the chemical reaction between the indium phosphide wafer and the polishing liquid is enhanced, and in the subsequent cleaning process, the corrosion effect of the mixed weak acid is combined, so that the residual Si impurities and other impurities on the surface of the indium phosphide wafer can be reduced, the micro-roughness of the indium phosphide wafer can be effectively reduced, and the surface flatness and uniformity can be improved.

The application discloses a method for recovering gold from a leaching solution containing a gold thiothiosulfate salt, comprising the following steps: (1) mixing gold-containing raw materials with a leaching solution, and performing solid-liquid separation after uniform mixing to obtain a leaching solution containing a gold thiothiosulfate salt; (2) mixing polyionic liquid with the leaching solution containing the gold thiothiosulfate salt to obtain a mixed solution, and performing solid-liquid separation after sufficient mixing until the polyionic liquid adsorption is completed, so as to obtain polyionic liquid adsorbed with gold; and (3) immersing the polyionic liquid adsorbed with gold into an acidic thiourea solution, and obtaining soluble gold salt after desorption; the structural formula of the polyionic liquid is shown in the following formula (I)-(IV); and the method disclosed by the application uses a plurality of polyionic liquids with special structures as adsorbents, and realizes efficient separation and recovery of gold from a gold thiothiosulfate salt system. (I); (II); (III); (IV).

The invention discloses a method for inhibiting cyclization side reaction of 2-chloro-5-chloromethylpyridine, and particularly relates to the field of compound preparation. According to the preparation method, 2-chloro-2-chloromethyl-4-cyanobutyraldehyde is taken as a raw material, and reducing reagents such as thiosulfate, pyrosulfite, ferrite and the like are added in the process of carrying out cyclization reaction on the 2-chloro-2-chloromethyl-4-cyanobutyraldehyde and a chlorination reagent, so that the stability and the reaction activity of an intermediate in the reaction process are improved, and the reaction temperature is reduced to inhibit the cyclization side reaction of 2-chloro-5-chloromethylpyridine. According to the method, new equipment does not need to be added, the production method is simple and rapid, byproducts are greatly reduced, and the method conforms to the national green environmental protection policy and is a new method suitable for large-scale production.

The invention belongs to the field of lepidolite processing, and particularly relates to a lepidolite leaching method which comprises the following steps: lepidolite is leached in an aqueous solution containing a composite catalyst and composite acid, and then solid-liquid separation is performed to obtain leach liquor containing lithium, aluminum and potassium and silicon-containing leach residues; the composite catalyst comprises a component A, a component B and a component C, wherein the component A is at least one water-soluble compound of MFn and formula (1); the component B is a water-soluble organic matter which contains two or more acid radicals in carboxylic acid groups and phosphonic acid groups and has the carbon number of 2-10; the component C is at least one water-soluble compound of sulfite, thiosulfate, hydrosulfite, thiourea dioxide and ferrite; the composite acid comprises a main acid and an auxiliary acid, the main acid is sulfuric acid, and the auxiliary acid is at least one of hydrochloric acid and phosphoric acid. According to the method, the lepidolite does not need to be modified, and elements such as Li, Si, Al and K in the lepidolite can be efficiently extracted and recycled.

The invention discloses a method for reducing the tin loss rate in the tin concentrate reverse flotation process, and belongs to the technical field of mineral processing. The method comprises the following steps: grinding and pulping tin concentrate, adding a flotation reagent containing a sulfur-arsenic mineral activating agent, and controlling the stirring rotating speed of a flotation machine at 800-1500rpm to carry out air inflation flotation, so as to obtain flotation concentrate which is a sulfur-arsenic concentrate product, and flotation tailings which are high-purity tin concentrate products; the sulfur-arsenic mineral activating agent comprises thiosulfate, soluble lead salt and soluble copper salt. According to the method, the activating agent capable of activating the arsenic-sulfur minerals in the tin concentrate in a high-selectivity mode is utilized to cooperate with low-speed stirring to accurately control the flotation stirring strength, and on the premise that efficient flotation of the arsenic-sulfur minerals is guaranteed, the loss of cassiterite in the arsenic-sulfur concentrate is reduced to the maximum extent.

The application belongs to the technical field of zinc-iodine batteries, and particularly relates to a preparation method and application of a thiosulfate intercalated zinc aluminum layered double hydroxide / iodine composite electrode material. The preparation method comprises the following steps: dissolving zinc nitrate hexahydrate and aluminum nitrate nonahydrate in deionized water, adding urea and stirring until completely dissolved, transferring the mixed solution into a polytetrafluoroethylene-lined stainless steel reaction kettle for hydrothermal reaction, collecting the precipitate by centrifugation, washing and drying, then reacting the obtained ZnAl-LDH nanosheet with an ion exchange solution containing sodium thiosulfate under inert gas protection, uniformly grinding the centrifuged and dried ZnAl-LDH-S2O3 nanosheet with iodine, sealing the mixture in a glass bottle for heating reaction, and then ultrasonically mixing the iodine-loaded ZnAl-LDH-S2O3 nanosheet with conductive carbon in ethanol, centrifuging and washing the mixture to obtain the precipitate which is dried. The composite electrode material obtained by the three-step method exhibits excellent electrochemical performance when applied to zinc-iodine batteries.

The invention belongs to the technical field of photoelectric detection, and particularly relates to a tin-lead perovskite near-infrared photoelectric detector and a preparation method thereof. Compared with the prior art, the perovskite thin film with better crystallization quality is obtained by regulating the crystallization kinetics of the thin film and passivating various ion defects by doping thiosulfate, so that the light current of a detector is improved, the dark current is inhibited, and the important performances such as the sensitivity and the responsivity of the device are improved; an effective way is provided for preparing a high-performance near-infrared photoelectric detector, the resolution ratio and the signal-to-noise ratio of an imaging chip are improved, meanwhile, the service life of the imaging chip is remarkably prolonged, and huge application potential is shown.

This application provides a gold leaching reagent system based on glycine and sodium thiosulfate, and a heap leaching process for gold-bearing minerals, belonging to the field of hydrometallurgical technology. The gold leaching reagent system includes: a mixed ligand gold leaching agent, a synergistic catalyst, and a sodium thiosulfate stabilizer; wherein the mixed ligand gold leaching agent includes glycine and sodium thiosulfate, the synergistic catalyst includes glutamic acid and molybdenum disulfide, and the sodium thiosulfate stabilizer is polyvinyl ammonium phosphate; the mass concentration of glycine is 10-50 g / L, the mass concentration of sodium thiosulfate is 10-15 g / L, the mass concentration of glutamic acid is 1-4 g / L, the mass concentration of molybdenum disulfide is 0.2-0.3 g / L, and the mass concentration of polyvinyl ammonium phosphate is 0.1-0.5 g / L. This application achieves efficient extraction of encapsulated gold under mild alkaline conditions, with low sodium thiosulfate consumption, high gold leaching rate, and is environmentally friendly and economical, suitable for heap leaching of low-grade gold-bearing sulfide ores.

This invention discloses a bifacial differentiated lithium battery separator and a lithium battery containing the separator, belonging to the field of lithium battery technology. The separator includes a base film and functional coatings on both sides. The positive electrode side coating contains lithium zirconium phosphate, which can selectively capture harmful metal ions. The negative electrode side coating comprises a dynamically cross-linked polyacrylic acid network of borate ester bonds, a modified garnet-type solid electrolyte, and a slow-release interface functional material composed of lithium thiosulfate supported on nitrogen-doped porous carbon, which synergistically achieves stress buffering, ion conduction, and interface self-healing. Its preparation includes preparing the composite material, formulating positive and negative electrode slurries, and sequentially coating and curing. The separator of this invention can actively adapt to the volume changes of the silicon-carbon negative electrode, effectively solving the problems of coating mechanical fatigue and interface failure, and significantly improving the cycle life and stability of the battery.

The invention provides a gold plating method for realizing soft gold plating, a composition for gold plating and a plating solution. The gold plating method is carried out by using a plating solution containing a gold sulfite salt and at least one of a thiosulfate ion and a trisulfate ion.

The present invention relates to a process for the preparation of a key intermediate of formula (I) in the synthesis of pyroxasulfone. The process comprises reacting an isoxazole of formula (II) with a sulfurizing reagent to produce an S-substituted thioisoxazole of formula (III); and coupling the S-substituted thioisoxazole of formula (III) with a pyrazole of formula (IV) by introduction of a methylene bridge to obtain a compound of formula (I). The present invention also relates to novel S-substituted thioisoxazoles of formula (III) wherein L1 is halogen or an anionic residue derived from an acid; R is an organic residue derived from a suitable sulfurizing reagent selected from dimethylthiocarbamide, thiosulfate, dithiooxamide, alkyl xanthate, thiobenzamide, N-substituted thiourea and thioacetate, and processes for their preparation.