23 results about "Cyanide ion" patented technology

This application relates to a flow battery system and a recovery method thereof. The method is used to control the flow battery system to perform N recovery cycles. When the electrolyte needs to be recovered for the i-th cycle, the method includes: closing the valves between the working battery stack and the positive and negative electrolyte storage tanks; starting the recovery battery stack charging and opening the valves between the positive electrolyte storage tank, the positive storage tank, and the recovery battery stack, allowing the positive electrolyte to circulate in the positive electrolyte storage tank and the negative electrode of the recovery battery stack, and the negative electrolyte to circulate in the negative electrolyte storage tank and the positive electrode of the recovery battery stack; wherein, hydroxide ions in the negative electrolyte are converted into oxygen and water on the positive electrode side of the recovery battery stack, and cations are transported across the membrane to the negative electrode side of the recovery battery stack in the form of hydrated ions, converting ferricyanide ions in the positive electrolyte into ferrous cyanide ions; hydroxide ions and ferricyanide ions are accumulated products during the operation of the working battery stack.

The invention relates to the technical field of flow batteries, in particular to a Fe-free Prussian blue analogue, a preparation method thereof and a solid energy storage material. The chemical composition of the Fe-free prussian blue analogue is Va [M (CN) b] c, wherein V exists in a form of one or a mixture of more than two of V < 2 + >, V < 3 + >, VO < 2 + > or VO < 2 + >; wherein M is one or two of Co and Ni, when M is a mixture of Co and Ni, the molar ratio of Co to Ni is (3: 1)-(1: 3), and the molar ratio of M to V is (1: 2)-(1: 5); trivalent cobalt is partially reduced, the molar weight ratio of trivalent nickel to divalent nickel is less than or equal to 0.3: 1, and V, M and cyanide ions form a three-dimensional network crystal through coordinate bonds. The Fe-free Prussian blue analogue is prepared from hexacyanocobaltate and / or tetracyanonickelate through a direct coordination method with a vanadium ion salt solution after valence regulation, and the technical problems that an existing solid energy storage material is poor in reversibility, low in voltage efficiency and the like can be solved.

The invention discloses a sample treating fluid, a vitamin B12 detection sample pretreatment method, a detection kit, a detection method and application thereof, and particularly discloses the sample treating fluid which comprises strong base and sodium dodecyl sarcosinate. According to the sample treatment liquid, VB12 can be completely dissociated, and a relatively stable state can be kept. The invention further provides a detection sample pretreatment method of the vitamin B12. The detection sample pretreatment method comprises the step of mixing the sample treatment liquid with a to-be-detected sample for reaction. According to the sample treatment liquid provided by the invention, VB12 can still be dissociated from binding protein under the condition that highly toxic cyanide or a complex containing cyanide ions and unstable in dissociation is not adopted, and the VB12 can be kept in a relatively stable state to participate in subsequent reaction.

This invention proposes a method for improving the quality of pyrite concentrate powder recovered from cyanide tailings, belonging to the field of slag resource utilization technology. The method includes: mixing raw cyanide tailings ore with water to form a cyanide tailings slurry; filtering the slurry through a fixed mesh screen to remove sand and gravel impurities; and conveying the slurry to an activation tank; adding concentrated sulfuric acid to the activation tank to convert cyanide ions into hydrogen cyanide gas, followed by the addition of alkali solution, a collector, and pine oil to obtain a slurry; agitating and aerating the slurry, causing FeS2-containing slurry particles to float to the surface and be scraped off; continuing agitation and aeration to enrich and purify the FeS2-containing slurry particles; further enrichment and purification followed by scraping off the FeS2 slurry particles to recover the FeS2 slurry particles, yielding concentrate and tailings slurries respectively; the concentrate and tailings slurries undergo solid-liquid separation under the action of a slurry pump, followed by pressure filtration; the filtrate is collected and discharged into a workshop circulating water tank for reuse; after unloading, the concentrate and tailings are collected separately. This invention produces high-quality pyrite concentrate powder with an FeS2 content of approximately 90%.

A corrosion control method and device for changing the condensate stripping tower overhead reflux system, the method comprising the following steps: 1) setting a cyanide ion control content index for the condensate to be refluxed into the ammonia stripping tower overhead, and monitoring the content of cyanide ions in the subsequent reflux condensate; 2) when the cyanide ion content exceeds the control content index, inject polysulfide into the condensate to be stripped. The method finds out the corrosion reason from the perspective of corrosion aggravation, establishes a cyanide ion control index, and when the cyanide ion control index exceeds the standard, the content of cyanide ions in the condensate is consumed by polysulfide. The reduction of cyanide ions can slow down the corrosion efficiency of ammonium carbamate, control the corrosion of the stripping device during the stripping of the condensate, and effectively control the corrosion from the root cause, reducing the risk of unplanned shutdown and subsequent inspection and maintenance costs.

The present disclosure relates to a polydiacetylene-based compound for detecting cyanide ions, a composition including the same, and a chemical sensor, and more particularly, to a polydiacetylene-based compound, which is a polymer of a self-assembly of diacetylene monomers represented by the following Chemical Formulas 1 and 2, a composition including the same, and a chemical sensor.(Chemical Formulas 1 and 2 are as defined in claim 1.)

The invention relates to the technical field of harmless treatment of gold ore cyanidation tailings, in particular to an environment-friendly harmless treatment device for gold ore cyanidation tailings. The medicament feeding mechanism is positioned at the top of the reaction box; the data acquisition mechanism is positioned at the top of the reaction box; and the mixing mechanism is positioned in the reaction box. The reaction box is used for harmless treatment of gold ore cyanidation tailings, a cyanide ion concentration sensor, a pH value sensor and a heavy metal concentration sensor capture core parameters such as cyanide ion concentration, pH value, dissolved oxygen and heavy metal concentration in real time, and data can be directly fed back to the PLC. Data collected by the PLC are respectively displayed at the cyanide ion concentration value display end, the PH value display end and the heavy metal concentration value display end, the PLC can compare the data collected information with a preset threshold value and then control the dosing pump to discharge, and the dosing pump pumps chemicals in the chemical tower into the reaction box through the first connecting pipe and the second connecting pipe.

This invention belongs to the field of gold extraction agent technology, specifically relating to a method for preparing a gold extraction agent. The invention provides a method for preparing a gold extraction agent, comprising the following steps: mixing sodium cyanate and iron powder, and carrying out a melt catalytic reaction to obtain the gold extraction agent. This invention uses iron powder as a catalyst, which can effectively promote the polymerization reaction of sodium cyanate. During the catalytic polymerization process, iron atoms can break the carbon-nitrogen triple bond in sodium cyanate into a carbon-nitrogen double bond, with one end of the carbon-nitrogen double bond linked to a sodium atom. The obtained gold extraction agent does not contain free cyanide ions and is therefore non-toxic. In application, the sodium in the obtained gold extraction agent can displace gold in gold ore, thus playing a role in gold refining. Test results from the embodiments show that the gold extraction efficiency of the gold extraction agent provided by this invention is comparable to that of sodium cyanide, and it is safe, environmentally friendly, and non-toxic.

A device for treating complex cyanide ions through an ozone method relates to the technical field of chemical equipment and comprises a device shell, a water inlet pipe and a water outlet pipe, the water inlet pipe and the water outlet pipe are arranged on the two sides of the device shell respectively, a retaining wall is arranged in the device shell, a primary filtering cavity is formed between the retaining wall and the side wall of the device shell, and an upper baffle and a lower baffle are arranged on one side of the retaining wall. The lower baffles and the upper baffles are staggered to form a serpentine channel; one upper baffle and one lower baffle are arranged on the inner walls of the two sides of the device shell to define a secondary filtering cavity, an ozone inlet pipe is arranged in a channel between every two adjacent secondary filtering cavities, one end of each ozone inlet pipe penetrates through the device shell to be connected with an ozone generator, the other end of each ozone inlet pipe is connected with an ozone spray gun, and a nozzle of each ozone spray gun faces the interior of the corresponding secondary filtering cavity. The device for treating the complex cyanide ions by the ozone method is high in treatment speed, high in treatment efficiency and simple and convenient to operate, ozone is used as an oxidizing agent, secondary pollution is avoided, and the effect of environmental protection is achieved while the cyanide ions are removed.

This invention provides a low-cost method for treating water containing cyanide ions. [Solution] A method for treating water to be treated, comprising step (a) of mixing water to be treated containing cyanide ions with hypochlorite, wherein in step (a), the pH of the mixed liquid is maintained at 8.0 or higher and the oxidation-reduction potential at +800mV or higher.

This application discloses a method for extracting rubidium and cesium and separating potassium and sodium from metal ion wastewater, relating to the field of liquid waste resource recovery technology in the metallurgical industry. This invention utilizes an integrated process of gradient precipitation-pyrolysis-water leaching-multi-stage crystallization, including rubidium and cesium precipitation, pyrolysis, water leaching, secondary precipitation, crystallization, and recrystallization, to separate and extract the main components such as potassium, sodium, rubidium, and cesium from the washing liquid into products such as potassium chloride, sodium chloride, and mixed rubidium and cesium precipitates. This achieves the reduction, resource recovery, and harmless utilization of multi-metal ion wastewater. This technology enables highly selective enrichment of rubidium and cesium, combines pyrolysis to decompose cyanide ions for harmless treatment, and utilizes the difference in potassium and sodium solubility to achieve efficient separation through multi-stage crystallization. It offers advantages such as high product value, good economic benefits, and ease of industrialization, opening up new avenues for the resource utilization of metal ion wastewater.

The application belongs to the technical field of biomedical detection and electrochemical sensor, and relates to a preparation method and application of a glutamate-pyruvate transaminase biosensor. A soluble metal salt containing cobalt cyanide ions is added into deionized water; copper salt and a complexing agent are uniformly dispersed with deionized water, and after mixing, a complexing reaction is carried out, and then filtration is carried out; the obtained solid is washed and dried, and then is uniformly mixed with polyvinylpyrrolidone, centrifuged, calcined, and CuCo / C nanoparticles are obtained, which are fixed on a gold electrode to obtain a working electrode. Glutamate oxidase, L-alanine and alpha-ketoglutaric acid are uniformly mixed with chitosan to obtain an enzyme solution, and a glutamate-pyruvate transaminase sensor is obtained by dropwise addition. The glutamate-pyruvate transaminase biosensor prepared by the application has a wide linear range and good sensitivity.

This invention discloses a method for preparing nickel cobalt cyanide, a Prussian blue analogue, and its application, belonging to the field of electrochromic materials technology. The purpose of this invention is to address the shortcomings of traditional co-precipitation methods for synthesizing Prussian blue analogues, which result in blocked ion migration channels, affecting their optical modulation range and color-changing response time. This invention introduces sodium citrate dihydrate as a complexing agent. By controlling the molar ratio of nickel ions to the complexing agent, the reaction rate of the system is controlled, achieving controllable synthesis of nickel cobalt cyanide particles. This not only allows citrate ions to first form a complex with nickel ions, slowly releasing nickel ions to react with cobalt cyanide ions, avoiding agglomeration and amorphous structures caused by rapid precipitation, but also facilitates ordered crystal growth, forming regular cubic nanostructures with more uniform particle size. The resulting cubic structure provides clearer ion diffusion paths and more uniform optical response, significantly improving electrochromic performance.

The application discloses a kind of probe compositions, including magnetic nano probe and noble metal nano probe, the magnetic nano probe includes magnetic bead and biological ligand, antibacterial peptide is formed by covalent combination, the noble metal nano probe includes the coordination polymer formed by divalent transition metal ion and cyanide ion, polymer containing amino group and / or carboxyl, nucleic acid aptamer bond is formed, the cyanide ion is modified on the surface of noble metal nanoparticle;Through magnetic nano probe, a variety of foodborne pathogenic bacteria are recognized, and are enriched, combined with different types of nucleic acid aptamer modification and the gold nano probe of Pb 2+ , Ni 2+ Metal ion and CN ‑ Formed coordination polymer, the detection of foodborne pathogenic bacteria is realized in magnetic control online surface enhanced raman device.

The present application relates to a kind of finished product vitamin B12 cyanide ion detection method, its steps include dissolution, adsorption and resolution, concentration and titration method detection.The present application provides a kind of simple process step, remove the color influence of finished product vitamin B12, ensure that cyanide ion detection result is correct method.

The application discloses a transformation condensate stripping process and a device thereof, and the process comprises extracting ammonia gas in the condensate by using a stripping tower, and injecting polysulfide into the condensate before the condensate enters the stripping tower, and the polysulfide is used for consuming the content of cyanide ions in the condensate. By adding the polysulfide into the condensate, the content of cyanide ions in the condensate is consumed by the polysulfide, the reduction of the cyanide ions can slow down the corrosion efficiency of the ammonium carbamate, the corrosion of the condensate to the stripping device in the stripping process is reduced, the effective control of the corrosion is realized from the root, the risk of unplanned shutdown and the subsequent inspection and maintenance cost are reduced, and the operation cycle of the condensate stripping system is effectively prolonged.

The application relates to the technical field of liquid flow batteries, in particular to a Fe-free Prussian blue analogue, a preparation method thereof and a solid energy storage material. a [M(CN) b ] c ; wherein: V exists in one of V 2+ , V 3+ , VO 2+ or VO2 + or a mixed form of two or more thereof; wherein M is one of Co, Ni or a mixture of Co and Ni, when M is the mixture of Co and Ni, the molar ratio of Co to Ni is 3:1-1:3, the molar ratio of M to V is 1:2-1:5; the trivalent cobalt is partially reduced, the molar ratio of trivalent nickel to divalent nickel is <=0.3:1, and V, M and cyanide ions form a three-dimensional network crystal through coordination bonds. The Fe-free Prussian blue analogue of the application is prepared by directly coordinating hexacyanocobaltate and / or tetracyanonickelate with a vanadium ion salt solution after valence state regulation, and can solve the technical problems of poor reversibility and low voltage efficiency of the existing solid energy storage material.

The invention provides a manioc waste liquid feed preparation process based on microbial fermentation, and belongs to the technical field of feed. According to the application, the nano calcium phosphate loaded high-valence ferric salt and the metal ion doped hydroxyapatite are introduced to solve the problems of excessive metal ions and anti-nutrient substance residues; the nano calcium phosphate loaded high-valence ferric salt efficiently oxidizes and removes cyanide ions and tannin in the fermentation liquor through ferrate loaded on the surface; oxidation products and part of ferric ions are fixed, so that inhibition on microorganisms is avoided; the metal ion-doped hydroxyapatite effectively captures excessive metal ions through ion exchange and complexation, reduces the free concentration of the metal ions, prevents adverse effects on microbial metabolism, can compete with anions in a fermentation liquid, inhibits the generation of toxic complexes, and reduces the toxicity to a fermentation system; the synergistic effect of removal of anti-nutrient substances and dynamic regulation and control of metal ions is achieved, and the nutritional value and safety of the final feed are improved.

The invention relates to a method for manufacturing a watch component comprising the following steps: a. providing a support made of polymer material (10); b. forming at least one base layer on at least a part of the support comprising a contact layer formed on the support, said contact layer being based on a metallic material whose equilibrium constant with respect to cyanide ions is greater than or equal to -5; c. forming at least one main layer (12) above said at least one base layer by electroplating using a galvanic bath comprising cyanide ions in order to form a watch component.

The invention discloses a method for recycling sodium cyanide tail liquid, which comprises the following steps: feeding cyanide-containing tail liquid into a stock solution pool, adjusting the pH value, filtering through a multi-medium filter and a self-cleaning filter, and removing suspended matters; switching to a standby adsorption tower through the adsorption tower; introducing a NaOH solution into the saturated resin, and circularly desorbing to obtain a desorption solution; removing organic impurities and heavy metal complexes from the desorption liquid through an activated carbon adsorption tower; concentrating the purified solution through an MVR (mechanical vapor recompression) evaporator; and the concentrated solution is directly reused in an electroplating or metallurgy main production process. According to the method, the recovery rate of sodium cyanide in the tail liquid is increased to 95% or above, and particularly for the industrial tail liquid with the cyanide ion concentration being 0.5-5 g / L, secondary utilization of resources is achieved; through deep purification and concentration, the purity of the recovered sodium cyanide solution reaches 99.5% or above, the concentration is stabilized at 200-300 g / L, the requirements of main production processes such as gold cyanidation leaching and electroplating are met, and degradation use is not needed.

The invention discloses a method for separating and recycling silver and mercury in mercury removal residues, and belongs to the field of metal refining. The method comprises the following steps: performing size mixing on mercury-containing gold ore leaching pregnant solution xanthate process mercury removal residues, and performing stirring reaction under the conditions that the pH value is 12-13.5, the cyanide ion concentration is 3-10% and the reaction temperature is 30-50 DEG C; and after the reaction is finished, filtering the slurry to obtain mercury xanthate filter residues and silver-containing filtrate. And returning the silver-containing filtrate to the mercury-containing gold ore of the production system, removing mercury, performing zinc powder replacement treatment on the pregnant solution, and recovering silver metal. The method comprises the following steps: adding excessive concentrated nitric acid into xanthate mercury filter residues for oxidation treatment, adding ascorbic acid to eliminate the oxidability of the residual concentrated nitric acid after stirring reaction is completed, then adding water for dilution, adjusting the pH value to 8-10, then adding sodium hydrosulfite, and reducing mercury to obtain mercury metal. The method solves the problem of hazardous waste treatment of mercury-containing gold ore leaching pregnant solution xanthate-process mercury removal slag, and realizes separation and recovery of silver and mercury metals.

The application provides a dual-mode colorimetric-fluorescent probe for detecting cyanide ions, uses a compound 1-(4-(1,2,2-triphenylvinyl)phenyl)-1H-pyrrole-2,5-dione (TPE-M) as a probe molecule, and after the reaction with cyanide ions in a sample to be detected, colorimetric detection can be carried out by observing color change with naked eyes or by detecting ultraviolet-visible absorption spectrum through an instrument; and fluorescence detection can also be carried out. The method can be used for qualitative and quantitative analysis, is simple to operate, is widely applicable to various detection environments, is rapid in detection, is good in selectivity, is high in sensitivity, is verified by dual modes, breaks through the bottleneck of the prior art, such as complicated operation, high specialization, high cost and single mode detection, and helps to realize upgrading of cyanide ion detection industrial technology.

The invention discloses a washable flexible electromagnetic shielding fabric and a preparation method thereof, and relates to the technical field of fabrics. According to the invention, ultraviolet radiation is adopted to activate the hollow fiber in a dry state, and then tinning is carried out, so that the combination degree is improved through the complexation reaction of cyanide in polyacrylonitrile and tin ions; then, micron silver particles are formed in the inner cavity and the surface of the fiber through air pressure intensity, the micron silver particles and the nanoscale tin layer form a rough structure, and a compact hydrophobic layer is formed; the preparation method comprises the following steps: firstly, preparing silver-plated tin-plated fibers, then modifying polyamide resin by utilizing salicylaldehyde, introducing Schiff base groups to synergistically play a more effective antibacterial role with silver particles, then co-spinning with 3-(methacryloyloxy) propyltrimethoxysilane to obtain polyamide fibers, and then weaving the polyamide fibers and the hollow silver-plated tin-plated fibers into a polyamide layer-hollow layer-polyamide layer composite three-layer fabric. The fabric prepared by the invention has the effects of washability, softness, electromagnetic shielding, antibiosis and water resistance.