15 results about "Thiosulfuric acid" 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.

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.

This application provides a gold leaching reagent system and its heap leaching process for treating low-grade gold ore, belonging to the field of hydrometallurgy. The gold leaching reagent system includes a main leaching agent, a catalytic leaching agent, and a stabilizer; wherein the main leaching agent is glycine, the catalytic leaching agent is anhydrous sodium thiosulfate, and the stabilizer is an organic ammonium salt. This application constructs a ternary stable and synergistic system of sodium thiosulfate-glycine-organic ammonium salt by introducing an organic ammonium salt with a specific structure. This optimizes the traditional thiosulfate gold leaching process from both thermodynamic and kinetic perspectives. The organic ammonium salt cations can dynamically adsorb around the thiosulfate ions in solution through intermolecular interactions, forming an effective shielding layer. This significantly inhibits the side reaction of sodium thiosulfate being oxidized and decomposed into sulfate and other ineffective products by dissolved oxygen, maintaining the long-term stability of the effective components in the leachate. This gold leaching reagent system has comprehensive advantages such as high leaching efficiency, good reagent stability, environmental friendliness, and low operating costs.

To provide a method for maintaining or increasing the content of rubisco protein in algal cells.SOLUTION: A method for producing a protein, comprising culturing an alga in a medium containing sulfate ions and / or thiosulfate ions under conditions that do not deplete the sulfate ions and / or thiosulfate ions, thereby maintaining or increasing the content of a rubisco protein in the algal body of the alga.SELECTED DRAWING: Figure 1

The purpose of the present invention is to improve a rubber composition comprising a rubber component and cellulose fibers, and to provide a method for producing such a rubber composition having good strength. Namely, the present invention provides a rubber composition comprising component A: a rubber component, component B: a cellulose-based filler, and component C: a water-soluble polymer, preferably a carboxyl methyl cellulose having a B-type viscosity of 20 mPas or more in a 1 mass% aqueous solution (25 DEG C, 30 rpm), or a salt thereof; it is preferable that the composition further comprises component D: a crosslinkable compound having a thiosulfuric acid group or an alpha, beta-unsaturated carbonyl group and an amino group. Also provided is a method for producing the rubber composition, which comprises a step for mixing and drying the components A to C, preferably the components A to D.

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 purpose of the present invention is to provide a method for maintaining or increasing the content of rubisco protein in an alga body. Provided is a method for producing a protein, which makes it possible to maintain or increase the content of rubisco protein in an alga body of an alga by adding sulfate ions and / or thiosulfate ions to a culture medium and culturing the alga under conditions where the sulfate ions and / or the thiosulfate ions are not depleted.

The application provides an extreme acidophilic sulfur-oxidizing bacterium and application thereof. The extreme acidophilic bacterium has strong oxidation on elemental sulfur and tetrathionate ions, is a chemolithoautotrophic acidithiobacillus, and can be used for removing elemental sulfur and tetrathionate ions in the environment, and has wide application prospects. The acidophilic sulfur-oxidizing bacterium has a preservation number of CGMCC No. 14839. The optimal growth temperature of the biological leaching and desulfurization provided by the application is normal temperature, and the optimal growth pH range is wide, so that the strain of the application has practical application significance. In addition, due to the characteristics of chemolithoautotrophy, the strain can improve the climate environment while recovering the environment.

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.

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 discloses an online reactivation system and method for a self-cleaning active alkali desulfurization process. In order to solve the problem that the alkali liquor is inactivated due to the fact that the solubility of sodium mercaptide is reduced due to accumulation of thermostable salt, the inactivated alkali liquor is led out by adopting skid-mounted equipment; sequentially performing activated carbon adsorption to remove organic sulfur substances, sand filtration to intercept suspended solids, cooling to separate out salt, cold filtration to remove inorganic salt crystals, anion resin exchange to deeply remove thermally stable salts such as sulfate radicals and thiosulfate radicals, alkali supplementation and blending to recover effective components, and finally returning to a main system. The method realizes on-line regeneration of the main device without shutdown, the desulfurization performance of the reactivated alkali liquor is effectively recovered, the removal rate of thermostable salt is high, the service life of the alkali liquor is remarkably prolonged, and the discharge of waste liquid is reduced.

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 application discloses a method for improving arsenic removal in a gold leaching tail liquid of hematite from thiosulfate, and belongs to the technical field of environmental engineering. 2+ The concentration of Cu is 35-40 mmol / L, the pH of the gold leaching tail liquid is adjusted to 10-11, and the concentration of thiosulfate in the gold leaching tail liquid is less than or equal to 0.1 mol / L; and (2) hematite powder is added into the gold leaching tail liquid after the adjustment in the step (1), and stirring is conducted to remove arsenic. The application effectively strengthens the adsorption and arsenic removal effect of hematite in the gold leaching tail liquid by regulating and controlling the content of copper ions and thiosulfate ions in the gold leaching tail liquid in combination with pH regulation, and lays an excellent foundation for realizing simple, low-cost and high-efficiency adsorption and arsenic removal.