8 results about "Sodium arsenite" patented technology

The present invention belongs to the field of metallurgy and relates to a method for synergistically recovering valuable elements from arsenic-antimony fly ash and antimony electrodeposition lean solution. The method comprises the following steps: S1: mixing the arsenic-antimony fly ash with the antimony electrodeposition lean solution for an alkaline leaching reaction, whereupon antimony oxide slag and an arsenic-rich antimony solution are obtained; S2: adjusting the pH of the arsenic-antimony solution obtained in step S1 to a pH of 7-8, whereupon antimony sulfide slag, hydrogen sulfide gas, and an arsenic-rich solution are obtained; and S3: adjusting the pH of the arsenic-rich solution obtained in step S2 to a pH of 1-2, whereupon arsenic sulfide slag, hydrogen sulfide gas, and a sodium sulfate solution are obtained. The present invention utilizes the synergistic reaction of the arsenic-antimony fly ash with the antimony electrodeposition lean solution, and subsequently separates arsenic and antimony from the arsenic-rich antimony solution by reacting sodium thioarsenite (Na3AsS3) and sodium thioantimonite (Na3SbS3) with acid in different sequences. The separation and recovery steps are simple and the recovery rate is high.

This invention relates to a method for preparing high-purity sodium pyroantimonate from antimony-containing waste, belonging to the field of sodium pyroantimonate preparation technology. Specifically, the method includes: crushing and ball milling the antimony-containing waste, followed by sulfidation-alkali leaching in the presence of modified inorganic mineral additives. Antimony enters the solution as Na3[SbS3], while lead, copper, and iron precipitate as sulfides in the slag phase. The additives improve the settling and filtration performance of the leaching slag and assist in the adsorption of colloidal arsenic. After deep purification of the leachate with sodium sulfide, the mother liquor is cooled and crystallized to remove arsenic, which is separated as sodium arsenite crystals. The purified liquid undergoes air oxidation precipitation under seed crystal induction, followed by liquid-solid separation, washing, and drying to obtain high-purity sodium pyroantimonate product. This invention meets the quality requirements of electronic-grade glass clarifying agents, and features strong process compatibility, controllable additive costs, and recyclable mother liquor.

The invention belongs to the technical field of metallurgy, and relates to a method for synergistically recovering valuable elements from arsenic-antimony soot and an antimony electrodeposition barren solution, which comprises the following steps: S1, mixing the arsenic-antimony soot and the antimony electrodeposition barren solution for alkaline leaching reaction, and obtaining antimony oxide slag and an arsenic-antimony-rich solution after the reaction is finished; s2, adjusting the pH value of the arsenic-antimony-rich liquid obtained in the step S1 to 7-8, and obtaining antimony sulfide slag, hydrogen sulfide gas and an arsenic-rich liquid after the reaction is finished; and S3, adjusting the pH value of the arsenic-rich liquid obtained in the step S2 to 1-2, and obtaining arsenic sulfide slag, hydrogen sulfide gas and a sodium sulfate solution after the reaction is finished. According to the method, the arsenic and antimony in the arsenic-antimony-rich liquid are further separated by utilizing the synergistic reaction of the arsenic-antimony soot and the antimony electrodeposition barren solution and utilizing the different sequences of the sodium thioarsenite (Na3AsS3) and the sodium thioantimonite (Na3SbS3) with the acid, the separation and recovery steps are simple, and the recovery rate is high.

This invention discloses a method for the simultaneous removal of arsenic and chlorine from waste acid based on sodium arsenite minerals, belonging to the field of wastewater treatment and resource recovery technology. The method includes: adding an oxidant to the waste acid solution; supplementing copper, sodium, calcium, and chlorine sources according to the stoichiometric ratio of sodium arsenite (NaCaCu₅(AsO₄)₄Cl·5H₂O); conducting a water bath heating reaction under stirring conditions; adjusting the pH of the solution; and inducing Na₂O. + Ca 2+ In situ, sodium arsenate precipitate (sodium arsenate chlorite) is formed by the coordination precipitation reaction of Cu²⁺, As(V), and Cl⁻. After solid-liquid separation, washing, and drying, the sodium arsenate chlorite mineral is obtained. This invention utilizes the coexistence of arsenic and chlorine in pollutants. By adjusting the ratio of key components and controlling the reaction conditions, both arsenic and chlorine are simultaneously introduced into the mineral lattice, achieving efficient removal and resource conversion of arsenic and chlorine. This invention achieves synergistic removal and resource utilization of pollutants, resulting in significant environmental and economic benefits.

The invention discloses a method for detecting the content of ethylene glycol in esterification wastewater, which comprises the following steps: performing closed hydrothermal separation treatment on wastewater to be detected to obtain a wastewater sample to be detected, and then detecting the content of ethylene glycol in the wastewater sample to be detected by adopting a gas chromatography quantitative analysis method. According to the method, high-risk chemicals are not used in the whole test process, new toxic substances and highly toxic products are not generated, the health of operators is not endangered, the method is safe and environment-friendly, and the used chemical reagents are low in safety control cost and risk. According to the method disclosed by the invention, the detection lower limit of the ethylene glycol content is 0.005%, the variation coefficient of the same sample to be detected is less than 1.0% according to the statistics of six test results, the deviation from the test result of a sodium arsenite chemical titration method is less than 0.05%, and the method has the characteristics of fine test precision, high result accuracy and good repeatability. According to the detection method disclosed by the invention, the test time consumption is only 1 / 3-1 / 4 of that of a sodium arsenite chemical titration method, so that the test efficiency and the timeliness of result feedback are greatly improved.

The invention discloses a radix puerariae tea drink and application thereof in preparation of a medicine for treating lung injury caused by arsenic poisoning, and belongs to the field of biological medicine. The invention provides a kudzuvine root tea drink prepared by soaking kudzuvine root blocks in boiling water, and provides application of the kudzuvine root tea drink in preparation of a medicine for treating arsenic poisoning lung injury. Experimental results show that for sodium arsenite exposed mice, the radix puerariae tea drink provided by the invention can effectively relieve immune microenvironment disorder in lung cells, maintain the oxidation-reduction steady state of lungs and remarkably improve mitochondrial injury and mitochondrial autophagic flow retardation in the lung cells. The radix puerariae tea drink provided by the invention has a remarkable effect of relieving and treating lung injury caused by arsenic poisoning, and the preparation method of the radix puerariae tea drink is simple, and the radix puerariae tea drink is suitable for daily drinking and long-term disease control. The invention provides a new medicine raw material for treating lung injury caused by arsenic poisoning, and has great medical value and wide application prospect.

The invention discloses an arsenic in-situ growth-metal organic framework material which is arsenic oxide nanoparticles formed in situ on the surface of a metal organic framework material by performing ligand exchange on an arsenic compound and the metal organic framework material, the arsenic compound is selected from sodium arsenite, disodium arsenate heptahydrate, arsenic trioxide and the like; the metal organic framework material is selected from ZIF-8 and the like. The invention also discloses bionic nano-particles for in-situ growth of arsenic. The bionic nano-particles are formed by coating an arsenic in-situ growth-metal organic framework material with a cell membrane. The invention further discloses application of the arsenic in-situ growth-metal organic framework material and the bionic nanoparticles in preparation of drugs for treating cancers. The arsenic in-situ growth-metal organic framework material disclosed by the invention is bionic nano-enzyme with enzyme-like activity and dual epigenetic regulation and control effects, and is uniform in morphology and relatively small in particle size; and due to cell membrane coating, the bone marrow targeting property is realized, the problem of insufficient targeting property of an arsenic compound is solved, and the tumor immunotherapy effect is enhanced.

The invention discloses a method for synthesizing benzyl arsonic acid by acidizing arsenic acid. The method comprises the following steps: preparing arsenic acid, preparing sodium arsenite, adding benzyl chloride into the sodium arsenite to react to generate benzyl arsonic acid sodium, and standing for layering; acidizing arsenic acid until the pH value is 1-3 to generate benzyl arsonic acid and sodium arsenate; and adding a transforming agent into the sodium arsenate, and reacting for 2 hours to obtain a sodium arsenite solution which is recycled as a raw material. According to the method, the arsenic acid is used for replacing sulfuric acid to acidify the sodium benzyl arsonic acid to generate the benzyl arsonic acid, sulfate radicals are not introduced, and no sodium sulfate waste salt is generated; sodium arsenate is converted into sodium arsenite to be recycled as a raw material, so that cyclic utilization of sodium and arsenic is realized, and the method has remarkable environmental protection and resource utilization values.