35 results about "Thiosulfates" patented technology

The invention discloses a precious metal leaching agent based on thiosulfate and a precious metal leaching process. The leaching agent contains thiosulfate, a thiourea-based catalyst and an iron-based oxidizing agent, and the molar ratio of the thiosulfate to the thiourea-based catalyst to the iron-based oxidizing agent is (0.05-5): (0.005-1): (0.005-1). According to the leaching agent, on the basis of the synergistic effect of all the components, the dissolution efficiency of precious metal is improved, generation of polysulfate in side reaction is greatly reduced, and follow-up precious metal recovery is facilitated. A leaching process adopting the leaching agent comprises the following steps: exposing precious metal sites of a precious metal-containing material, adding the leaching agent, adjusting the pH value of a leaching system, carrying out a leaching reaction, and carrying out solid-liquid separation after the reaction is finished, so as to obtain a precious metal leachate. According to the technology, by controlling the pH value of the system and the adding amount of the leaching agent, leaching of different grades and types of precious metal-containing materials can be achieved under the normal temperature condition, and tests show that by taking gold ore as an example, the gold recovery rate of the technology can reach 100% at most.

The invention discloses a thiosulfate-doped low-stress room-temperature flexible perovskite thin film deposition method, and relates to the field of perovskite solar cells, and the method comprises the steps: preparing a perovskite precursor solution; adding iodine as an additive into the perovskite precursor solution to obtain a mixed solution; preparing the mixed solution into a thin film through a spin-coating process, dropwise adding an anti-solvent to the surface of the thin film in the spin-coating process, and standing at normal temperature to form a perovskite thin film; wherein the anti-solvent is a chlorobenzene solution doped with thiosulfate. Controllable heat release is achieved through the oxidation-reduction reaction of thiosulfate and iodine, a traditional thermal annealing process is replaced, precursor solvent volatilization can be promoted, perovskite material crystallization is induced, and the high-quality perovskite thin film can be obtained at the room temperature.

The invention provides a reverse osmosis reducing agent and a preparation method and application thereof, and belongs to the technical field of reverse osmosis water treatment.The reverse osmosis reducing agent comprises a first reducing agent, a second reducing agent and a solvent; the first reducing agent is thiosulfate, and the second reducing agent is sulfite and / or bisulfite; the mass ratio of the first reducing agent to the second reducing agent is (1: 18)-(10: 1). The reverse osmosis reducing agent can be applied to reverse osmosis water treatment, the reverse osmosis reducing agent is added into reverse osmosis inlet water to be treated, and the reverse osmosis inlet water subjected to reduction treatment can be obtained after full reaction. The first reducing agent and the second reducing agent are compounded according to the specific mass ratio, so that the compounded reverse osmosis reducing agent can effectively inhibit the occurrence of advanced oxidation chain reaction while keeping high reducibility, and effective reduction of reverse osmosis inlet water can be realized by using a small amount of the reverse osmosis reducing agent.

The invention relates to the technical field of precious metal recovery and water treatment, in particular to application of cobalt catalytic activation persulfate in recovery of gold in thiosulfate leachate. The invention provides application of cobalt catalytic activation persulfate in recovery of gold in thiosulfate leachate. The method comprises the following steps: blending a cobalt catalyst, persulfate and a thiosulfate leaching solution containing Au (S2O3) 2 < 3->, and carrying out complex breaking reduction to obtain a gold elementary substance. The CoNC / persulfate technology provided by the invention is proved to be a catalytic system based on singlet oxygen species, has high oxidation capacity and strong complex breaking selectivity, shows remarkable solution acid-base property adaptation and coexisting cation / anion interference resistance, and has ultrahigh recovery selectivity.

A process for recovering dissolved precious metal from an aqueous solution containing thiosulfate and precious metal. The process includes contacting the precious metal- thiosulfate solution with amino acid (or derivative thereof) and activated carbon to adsorb precious metal onto the activated carbon and form loaded activated carbon. The process also includes recovering precious metal from the loaded activated carbon.

The invention provides an environment-friendly gold beneficiation aid and a preparation method thereof. The aid comprises 30-60 parts of a modified thiosulfate complexing component, 15-30 parts of a catalytic stable oxidation component, 8-20 parts of an interface functional component, 10-25 parts of a buffer component and 5-15 parts of a permeation aid. The preparation method comprises the following steps: performing high-shear mixing on the raw materials to obtain a homogeneous mixture; curing and stabilizing the homogeneous mixture to obtain a cured material; and carrying out air jet pulverization on the cured material until D90 is 20-40 microns, so as to obtain the additive product. According to the additive, by innovatively compounding a modified thiosulfate complexing component and a catalytic oxidation system, cyanide pollution is completely eradicated while efficient leaching of gold is achieved, and the additive has the advantages of environmental protection breakthrough and leaching efficiency.

The present invention provides a method for enhancing the anaerobic degradation of chlorinated organophosphates in sludge by using thiosulfate, which comprises the following steps: placing the concentrated sludge containing chlorinated organophosphates in a fermentation tank, adding a thiosulfate solution, sealing it for pretreatment, adding inoculated sludge, purging oxygen by nitrogen bubbling, and sealing the fermentation tank for anaerobic reaction. The thiosulfate accelerates the anaerobic reductive dechlorination process of chlorinated organophosphates in the sludge, promotes the degradation and removal of chlorinated organophosphate pollutants in the sludge, and provides a technical reference for the safe treatment of sludge.

The present invention relates to the use of thiosulfate to potentiate the anti-pathogenic effect of lactobacilli bacteria, the thiosulfate being in a quantity of at least 100 mg for 107 to 1010 CFU of lactobacilli. The invention also relates to a pharmaceutical composition including at least 100 mg of thiosulfate per gram, in combination with a Lactobacillus crispatus strain, and to its use in the treatment of urogenital infections such as vaginosis, candidosis and urinary tract infections.

The invention discloses a method for extracting gold through leaching after preoxidation of sulfide gold ore, and aims to solve the problems of low recovery rate, serious environmental pollution and the like of a traditional gold extraction method. The method comprises the following steps: firstly, mixing and finely grinding the gold sulfide ore and caustic soda flakes to 325 meshes, and adjusting the concentration of ore pulp to 33%; then, oxygen-enriched air is introduced into the reaction kettle and heated to 90 DEG C, pre-oxidation treatment is carried out for 18 hours, sulfide minerals are oxidized and decomposed, and gold particles are exposed; then, adding a golden cicada environment-friendly gold extraction agent and activated carbon for leaching, continuously reacting for 18 hours to form a thiosulfate complex of gold, and adsorbing the thiosulfate complex by the activated carbon; and finally, recovering gold by filtering and analyzing electrolytic activated carbon, and performing dry discharge on tailings to prepare bricks. By implementing the method, the leaching recovery rate of gold can be remarkably increased to 97%, meanwhile, cyanide is prevented from being used, environmental pollution is reduced, comprehensive utilization of resources is achieved, and the method has the multiple advantages of being efficient, environmentally friendly, economical and the like.

The invention provides a method for improving the anaerobic fermentation acid production effect of oxytetracycline-containing sludge by using thiosulfate pretreatment, which comprises the following steps: adding anaerobic sludge of a sewage plant into a fermentation tank as inoculated sludge, adding oxytetracycline and thiosulfate, then blowing nitrogen to drive oxygen, sealing the fermentation tank to degrade oxytetracycline through constant-temperature anaerobic fermentation, and carrying out centrifugal separation to obtain the oxytetracycline-containing sludge. The supernatant is fermentation liquor rich in volatile fatty acid; wherein the total suspended solid concentration of the inoculated sludge is 20-27 g / L, the mass concentration of the thiosulfate in the sludge is 900 mgS / L in terms of S, and the adding concentration of the oxytetracycline is 5-25 mg / L. According to the method, sludge hydrolysis is promoted, a microbial community structure is adjusted and electron transfer is accelerated by utilizing the reducibility of thiosulfate, so that the conversion rate of organic matters to VFA is increased, oxytetracycline is synchronously and efficiently removed, and a new solution is provided for antibiotic pollution control and sludge resource utilization.

The invention relates to the technical field of biological sewage treatment, in particular to an autotrophic flora coupling denitrification method by taking desulfurization waste liquid in the coking industry as electron donors, which comprises the following steps: taking thiocyanate and thiosulfate in the desulfurization waste liquid in the coking industry as the electron donors; efficient removal of nitrate nitrogen in the wastewater is achieved through the coupling effect of the sulfur autotrophic denitrification process and the anaerobic ammonia oxidation process, and meanwhile resource utilization of the desulfurization waste liquid is achieved. In the sulfur autotrophic denitrification process, reducing state sulfur is used as an electron donor to reduce nitrate nitrogen into nitrogen and nitrite nitrogen, meanwhile, thiocyanate is converted into ammonia nitrogen and sulfate, and thiosulfate is converted into sulfate; ammonia nitrogen and nitrite nitrogen are converted into nitrogen in the anaerobic ammonia oxidation process, and a small amount of generated nitrate nitrogen can be continuously used as a substrate in the sulfur autotrophic denitrification process. The method does not need additional organic carbon sources, is low in operation cost, low in sludge yield and environment-friendly, realizes treatment of wastes with wastes, and has economic benefits and environmental protection values.

This invention belongs to the field of hydrometallurgical technology, specifically relating to a method for enhanced gold extraction from cyanide tailings based on magnetically controlled hydrothermal magnetization activation and manganese doping treatment. The method includes: providing cyanide tailings particles; adding the cyanide tailings particles and a biomass reducing donor to an aqueous medium to form a slurry; adjusting the pH of the slurry to obtain an alkaline reaction system; adding a magnetothermal medium of ferric oxide or ferric chloride to the slurry and stirring with MnSO4 to obtain a reaction slurry; placing the reaction slurry in a closed magnetically controlled hydrothermal reactor and conducting a hydrothermal reaction under an external magnetic field; after cooling the reaction product, performing solid-liquid separation; performing graded magnetic separation on the solid phase; leaching the non-magnetic product using a thiosulfate-ammonia system to allow gold to enter the leaching solution; adding a recyclable magnetic gold-capturing carrier to the leaching solution for adsorption and enrichment; recovering the carrier through magnetic separation and regenerating it through analysis to obtain a gold-rich solution; and recovering gold from the gold-rich solution. The above method can stably achieve a synergistic gain in gold extraction and harm reduction under low-temperature hydrometallurgical conditions.

The present application relates to a method for purifying citalopram or S-citalopram or their salts. The method comprises treating citalopram or S-citalopram with a water-soluble solution containing sulfite or thiosulfate, and then taking the organic layer, and further separating to obtain citalopram or S-citalopram free base; or adding acid to form a salt, and separating to obtain citalopram or S-citalopram acid salt. The purification method provided by the present application is simple in operation and high in impurity removal rate.

The present application relates to a kind of sulfur autotrophic denitrification fillings and its preparation method, belong to the sulfur autotrophic denitrification technical field of river and lake ecological management field, including mass ratio 1:1.2:0.2:0.1:0.01 of A component, B component, C component, D component, E component, the A component includes mass ratio 5:3:1:1 of sulfur powder, siderite powder, thiosulfate and active clay;The B component is alginic acid propylene glycol ester aqueous solution;The C component is the mixture of binder and volatile agent with mass ratio 5:2;The D component is hydrogen sulfide remover, neutralizing agent and digestion agent with mass ratio 5:3:2;The E component is denitrifying sulfur bacteria.The present application is a kind of low-cost treatment technology for sulfur autotrophic denitrification, and biological can use sulfate in water to complete denitrification by itself, without the support of external energy, can significantly reduce cost.

The invention discloses a denitrification method utilizing thiosulfate autotrophic short-cut denitrification and anaerobic ammonia oxidation coupling, and belongs to the field of sewage treatment. The invention aims to solve the problems of strong carbon source dependence, incomplete removal of NH4 < + > and NO3 <->, easy accumulation of NO2 <-> and poor system stability in the existing low C / N ratio wastewater denitrification process. The method comprises the following steps: 1, preparing inoculated sludge; 2, setting operation conditions of the reactor; and 3, operating the reactor. The method is used for denitrification by utilizing thiosulfate autotrophic short-cut denitrification and anaerobic ammonia oxidation coupling.

The invention discloses sulfinic acid lithium salt and a preparation method thereof, a lithium battery electrolyte and a lithium battery, the sulfinic acid lithium salt has a structure as shown in formula 1, the preparation method of the sulfinic acid lithium salt comprises the following steps: S1, reacting dibromoalkane with a thiosulfate aqueous solution, and concentrating after the reaction is finished to obtain an alkane thiosulfate intermediate; s2, adding an acid solution into the alkane thiosulfate intermediate, and carrying out acidification reaction to obtain an alkane sulfinic acid aqueous solution; s3, adding a lithiation reagent into the alkane sulfinic acid aqueous solution for reaction, and purifying to obtain sulfinic acid lithium salt as shown in a formula 1; the preparation method is simple, the steps are short, the reaction process is mild, raw materials are green, the yield of the sulfinic acid lithium salt is high, the sulfinic acid lithium salt can effectively regulate and control solvation and dissociation balance of Li < + >, and the sulfinic acid lithium salt can be used as a main or unique lithium salt when being used in the lithium ion battery electrolyte.

The application discloses a kind of thiosulfate doped low stress room temperature flexible perovskite film deposition method, it is related to perovskite solar cell field, the method includes: preparation perovskite precursor solution;Iodine is added as additive to perovskite precursor solution to obtain mixed solution;Mixed solution is prepared into thin film by spin coating process, anti-solvent is added dropwise to the surface of thin film in the spin coating process, and perovskite thin film is formed after normal temperature standing;Wherein, anti-solvent is chlorobenzene solution doped with thiosulfate.The application realizes controllable heat release by the redox reaction of thiosulfate and iodine, replaces traditional heat annealing process, can promote precursor solvent volatilization, induces perovskite material crystallization, and high-quality perovskite thin film can be obtained at room temperature.

The invention discloses a method for recovering nickel in smelting acid mud through microwave-enhanced thiosulfate leaching-electrodeposition. The method comprises the steps of raw material preparation, leaching agent preparation, microwave reaction mixing, electrodeposition treatment and regeneration treatment. According to the method, the microwave-enhanced thiosulfate leaching technology is adopted, the leaching efficiency of nickel can be remarkably improved, the nickel recovery rate can reach 98% or above after the reaction is carried out for 1 h in the microwave environment at the temperature of 118-122 DEG C, and compared with a traditional technology, the nickel extraction efficiency is greatly improved through the improvement, resource waste is reduced, and the method is suitable for industrial production. In the regeneration treatment step, a microwave regenerator is used for treating the waste electrolyte under the conditions of 120 DEG C and 2.45 GHz, S4O6 < 2-> is reduced into S2O3 < 2->, high-efficiency regeneration of thiosulfate is achieved, the regeneration rate reaches 95% or above and is improved by 137.5% compared with a traditional process, and therefore consumption of chemicals is reduced, and the generation amount of waste is reduced.

The present invention discloses a microbial electrochemical coupled desulfurization device and method, relating to the field of microbial electrochemical water treatment technology. The microbial electrochemical coupled desulfurization device comprises a flotation unit, a desulfurization unit, and an aerobic unit. The flotation unit removes suspended matter and oil pollutants from wastewater. Microorganisms in the desulfurization and aerobic units reduce sulfates, thiosulfates, and sulfites in the sulfur-containing wastewater to sulfides, while simultaneously degrading organic matter in the wastewater and converting chemical energy into electrical energy to power the electrical equipment in the desulfurization device. While meeting petrochemical wastewater discharge standards, the device can effectively reduce energy consumption and operating costs for sulfur-containing wastewater treatment.

The invention provides a preparation method and application of a hydrodenitrification catalyst, and the preparation method comprises the following steps: step 1, mixing an active component precursor, a dispersant and thiosulfate to prepare an impregnation liquid; and 2, mixing a carrier with the impregnation liquid, carrying out pressurization treatment, drying, and roasting to obtain the hydrodenitrification catalyst. The dispersion degree of metal active components of the catalyst is promoted by adding the dispersing agent, the sulfuration degree of the catalyst can be improved by adding the thiosulfate, sulfur vacancies of the catalyst are increased, then active sites for adsorbing reactant macromolecules are increased, and the hydrodenitrogenation performance of the catalyst is improved.

The application discloses application of guanidine functionalized microspheres to recovery of gold (I) in a thiosulfate solution and belongs to the technical field of precious metal recovery. In the application, a compound containing a guanidine functional group ((NH2)2C(=NH)) is used as a modifying reagent, chloromethylated polystyrene microspheres are used as a carrier, anhydrous sodium carbonate is used as an acid-binding agent, and dimethylformamide is used as a solvent, and an adsorbent containing the guanidine functional group is prepared through a nucleophilic substitution reaction. The guanidine functionalized microspheres prepared by the method can efficiently recover [Au(S2O3)2] 3‑ complex ions in a thiosulfate gold leaching solution and is not easy to be pulverized; the preparation of the adsorbent is simple and easy to implement and has low cost. In general, the material prepared in the application is an excellent adsorbent for recovery of gold (I) in a thiosulfate solution.

The invention belongs to the technical field of biological detection, and particularly relates to a method for detecting a sulfur-containing compound as an RHOD sulfur persulfide receptor. Researches find that an intermediate product glutathione sulfonate is generated by the reaction of GSSH and ROOH, and RHOD from different sources can catalyze the reaction of GSSH and H2O2 to generate thiosulfate. Wherein RHOD protein GlpE from escherichia coli captures S0 atoms in GSSH through cysteine residues in the active center of the RHOD protein GlpE, and an over-sulfuration modified enzyme intermediate (P-SSH) is formed. And then S0 is transferred to GSSO3H, and S2O3 < 2-> or long-chain GSNSO3H is generated. Therefore, GSSO3H can be actually used as a sulfur persulfide acceptor of GlpE. Meanwhile, in order to detect the S0 content in the reaction process, the invention also optimizes a cyanide process detection method for the S0 content, and the method has good practical application value.

The invention relates to a surface grafting modified substrate and a preparation method thereof. According to the preparation method, thiosulfate is adopted as an inorganic modifier, and the thiosulfate and epoxy groups on the surface of an epoxy resin substrate are subjected to chemical reaction, so that the surface of the substrate is grafted and modified. After modification, new hydroxyl groups can be generated on the surface of the substrate, the chemical bonding effect of the substrate and copper is improved, and the interface bonding force is improved.

The present invention is a sulfur compound measurement method for diagnosing a disease, the method comprising a measurement step for using a mass spectrometer to analyze a sample obtained from the exhaled breath of a subject, and measuring the amounts of a plurality of types of sulfur compounds contained in the sample, the measurements being used for diagnosing whether the subject is suffering from a prescribed disease. The plurality of types of sulfur compounds include two or more types of sulfur compounds selected from among ten types of sulfur compounds, namely hydrogen sulfide, hydrogen disulfide, hydrogen trisulfide, hydrogen tetrasulfide, cysteine, cysteine persulfide, glutathione, glutathione persulfide, sulfurous acid, and thiosulfuric acid.

The present invention discloses a short-process and low-cost continuous and stable gold extraction process by thiosulfate method, belonging to the field of hydrometallurgy. In a closed reactor, by adjusting the concentrations of dissolved O2, thiosulfate and catalyst to a lower level, the pulp potential is decreased to an appropriate range to leach gold ore, and the leached residue and leached pregnant solution are obtained by filtration. Pure nitrogen is introduced into the leached pregnant solution to exhaust the oxygen in the solution, and copper powder is added for displacement. The copper-rich crude copper and the displacement lean solution are obtained by filtration. The copper-rich crude copper is treated by electrolytic refining, pure copper is obtained at the cathode, and gold mud is obtained at the anode. The gold mud is washed with dilute acid to obtain the acid washing solution containing copper and pure gold. After adjusting the pH of the acid washing solution containing copper, it is combined with the displacement lean solution supplemented with the leaching agent for the leaching of fresh ore in the next cycle. The method of the present invention takes into account the problems of long process flow, high cycle cost and great environmental protection pressure of the copper-ammonia-catalyzed thiosulfate method, and is suitable for use in the natural environment.

The present disclosure provides pharmaceutical compositions comprising thiotepa and one selected from PEG, such as PEG400 or PEG600, and DMSO, and optionally water or an aqueous saline solution and thiosulfate. The composition is free or substantially free of impurities. Also provided is a method for treating cancer in a subject, or myeloablation prior to bone marrow transplantation using the composition. A method for enhancing the stability of a thiotepa formulation is also contemplated.

The invention relates to a method for recycling waste refractory products which are initially arranged in a working position in a thermal plant and which are contaminated by alkaline cyanides, the method comprises the following successive steps: a)-removing the waste refractory product from the working position,-reducing the particle size of the waste refractory product to obtain a particle mixture; b) contacting the particle mixture with a solution comprising a thiosulfate compound or a "thiosulfate solution" before and / or during the removal, and / or between the removal and the particle size reduction, and / or during the particle size reduction of step a) and / or after step a), to obtain a two-phase mixture; and e) separating the liquid phase from the two-phase mixture and using the particle mixture to produce a new refractory product.

This invention provides a novel method for preparing a self-supporting porous supercapacitor material, belonging to the field of supercapacitor electrode materials. The preparation method includes the following steps: immersing nickel foam in a corrosion solution containing iron salts and a sulfur source, then placing it within the coil of an alternating magnetic field induction heating device for in-situ corrosion reaction, generating an Fe-doped nickel-based composite on the pore walls of the nickel foam, thus obtaining a precursor; drying and oxidizing the precursor to obtain the novel self-supporting porous supercapacitor material; the sulfur source includes one or both of thiosulfate and thiourea; the nickel-based composite includes Ni(OH)₂ and Ni₃S₂; the nickel-based composite is a porous structure composed of nanoclusters; adjacent pores in the porous structure are interconnected. The synergistic effect of the thermal, electric, and magnetic fields of the alternating magnetic field accelerates corrosion kinetics, promotes the formation of a bicontinuous porous structure, and enhances the electrochemical energy storage performance of the material.

The application provides an antibacterial solution for antibacterial treatment of an aluminum alloy after anodic oxidation, the pH value of the antibacterial solution is 5.5-6.5, the antibacterial solution is prepared from raw materials including an antibacterial element source, a complexing agent, sodium carbonate, citric acid, a surfactant and water, wherein the antibacterial element source includes water-soluble salts of silver, copper, zinc and zirconium, and the complexing agent includes thiosulfate. The antibacterial solution is suitable for surface treatment of all anodized aluminum alloy products in existing mass production, does not need to be changed, has low cost, can form an antibacterial layer with excellent antibacterial ability on the oxide film layer, and does not reduce the corrosion resistance of the aluminum alloy part. The application also provides an antibacterial aluminum alloy part and a preparation method thereof.