616 results about "Thiocyanic acid" patented technology

The invention belongs to the technical field of aqueous zinc ion batteries, and discloses an aqueous zinc ion battery negative electrode coating material and a preparation method and application thereof. Coumarin hydrazide reacts with benzyl isothiocyanate to generate a multi-nitrogen-oxygen-sulfur heteroatom ligand capable of coordinating with zinc ions, and the required aqueous zinc ion battery negative electrode coating material LXB-Zn is further prepared by doping with polyvinylidene fluoride. The synthesized aqueous zinc ion battery negative electrode coating material contains imino groups and heteroatoms S, O and N, can inhibit a hydrogen evolution reaction and provides more active sites, so that dendrites and side reactions are inhibited, and the cycling stability of an aqueous zinc ion battery is effectively improved. In order to solve the problem that an organic coating of a water-based zinc ion battery negative electrode is difficult to prepare, the organic coating of the water-based zinc ion battery negative electrode is prepared by adopting a simple method of adding an adhesive.

The invention provides a gold leaching agent for treating high-carbon gold-bearing minerals and a gold leaching process, and belongs to the technical field of hydrometallurgy. According to the gold leaching agent, guanidinium thiocyanate is used as an agent main body, a hydroximic acid compound is used as a complexing synergist, and soluble inorganic salt of ferric iron is used as a competitive adsorbent. In a leaching system, guanidine thiocyanate can be decomposed to generate guanidine, sodium sulfide, sodium thiocyanate and water. Thiourea anions are converted into cyanamide under the alkaline condition, then cyanamide is slowly released and decomposed into cyanide ions, the cyanide ions are complexed with gold ions, and gold leaching is achieved. Namely, guanidinium thiocyanate has the effect of releasing the cyanide ions step by step, and slow release of the cyanide ions is realized. The gold leaching agent system does not contain cyanide (sodium cyanide, potassium cyanide and the like) and is a clean and environment-friendly agent system, and efficient leaching of gold in high-carbon gold-bearing minerals can be achieved through the synergistic effect of all functional agent components.

The invention discloses a waterproof heat-resistant adhesive and a preparation method thereof, and relates to the technical field of adhesives. Tetramethyltri-3-trifluoropropyl cyclotetrasiloxane is used as a raw material to prepare hydroxyl-terminated organic fluorosilicone oil and modified epoxy resin, fluorine atoms are closely arranged around a main chain of the hydroxyl-terminated organic fluorosilicone oil and modified epoxy resin in an umbrella shape, and the hydroxyl-terminated organic fluorosilicone oil and modified epoxy resin cooperate with organic silicon to improve the waterproof and heat-resistant effects; hydroxyl groups on the oxidized carbon nanofibers are reacted and combined with thiocyanate in vulcanized rubber powder, and hybrid filler is formed; residual active groups on the surface of the oxidized carbon fiber are combined and crosslinked with epoxy resin, so that the heat resistance of the epoxy resin is greatly improved; secondly, phenyl maleic anhydride is used as a cross-linking agent to form a three-dimensional cross-linked structure, and meanwhile, phenyl is introduced into the structure, so that the heat-resistant effect and the waterproof effect of the epoxy resin are further improved, and the adhesive prepared by taking the epoxy resin as the raw material has excellent waterproof and heat-resistant performance. The adhesive prepared by the invention has waterproof and heat-resistant effects.

The invention discloses a preparation method of an FSP1 inhibitor FSEN3, which comprises the following steps: by taking 4-methoxybenzoyl hydrazine and allyl isothiocyanate as raw materials, forming a thiourea intermediate through nucleophilic addition reaction, carrying out cyclization reaction under the action of alkali, then reacting with liquid bromine to construct a thiazolotriazole skeleton, and finally preparing the FSP1 inhibitor FSEN3. And then carrying out substitution reaction with indoline to obtain a target product FSEN3 as shown in a formula (I). The total synthesis method provided by the invention is mild in condition, simple and convenient to operate and high in total yield. # imgabs0 #

The invention relates to a composite nanodot loaded porous carbon nitride photocatalyst as well as a preparation method and application thereof, and the preparation method comprises the following steps: calcining a precursor formed by mixing melamine, cyanuric acid and trithiocyanuric acid to obtain porous carbon nitride, and loading cobalt oxide nanodots and nickel nanodots on the porous carbon nitride in two steps, the composite nanodot loaded porous carbon nitride photocatalyst with excellent visible light catalytic hydrogen production performance is obtained; when the composite nanodot loaded porous carbon nitride photocatalyst obtained by the method is used for photocatalytic hydrogen production, an activity test result shows that the activity of the photocatalyst prepared by the method is improved by 222.5 times compared with that before modification; the preparation method disclosed by the invention has the advantages of high reaction efficiency and good performance of the obtained photocatalyst, and has a wide application prospect.

The invention discloses an antistatic polyester fiber and a preparation method thereof, and relates to the field of fibers. When the antistatic polyester fiber is prepared, N, N-dimethylethanolamine reacts with allyl chloride, and then dichloro phthalocyanine silicon is grafted to obtain modified silicon phthalocyanine; polymerizing terephthalic acid, itaconic acid and ethylene glycol, and reacting with fluorescein isothiocyanate and modified silicon phthalocyanine in sequence to obtain modified polyester chips; the preparation method comprises the following steps: reacting phosphonitrilic chloride trimer with 3-hydroxy-5-nitropyridazine, and reducing to obtain a flame retardant; and carrying out melt spinning on the modified polyester chips and a flame retardant, and reacting to obtain the antistatic polyester fiber. The antistatic polyester fiber prepared by the invention has excellent antistatic property, antibacterial property, flame retardance and mechanical property.

The cyanide-free copper-zinc alloy plating solution comprises 18-24 g / L of polycuprous thiocyanate, 9-13 g / L of polyzinc thiocyanate, 130-170 g / L of polysodium thiocyanate and 8-12 mL / L of brightener, the pH value of the plating solution is 10-12, the temperature of a plating bath is 35-55 DEG C, the cathode current density is 0.5-1.5 A / dm < 2 >, the cathode movement speed is 3-5 m / min, a copper-zinc alloy plate with the copper mass fraction being 68% is used as an anode, and the anode movement speed is 3-5 m / min. The brightening agent is prepared from 60 to 100 parts of N, N '-di-n-propylethylenediamine, 10 to 20 parts of waterborne polyurethane resin, 80 to 120 parts of polyacrylamide of which the molecular weight is less than 8000 and 770 to 870 parts of deionized water. A steel matrix or zinc alloy matrix copper-zinc alloy and bright nickel plated sample piece is subjected to an acetate fog test for 72 h according to GB / T 10125-2021 Artificial Atmosphere Corrosion Test Salt Spray Test, the surface of the steel matrix or zinc alloy matrix copper-zinc alloy and bright nickel plated sample piece is free of rust, and according to GB / T 5270-2005 Metal Covering Layer Electro-Deposition and Chemical Deposition Layer Adhesive Strength Test Method, the coating binding force is tested by a thermal shock method. And the result meets the standard requirement.

The present invention discloses a low-temperature resistant and early-strength type alkali-free liquid accelerating agent and its preparation method, belonging to the technical field of alkali-free liquid accelerating agents. The composition includes 12-15 parts of aluminum sulfate, 2-5 parts of sodium thiocyanate embedded by β-cyclodextrin, 5-8 parts of calcium hydroxide deactivator, 3-5 parts of fiber, 5-10 parts of hydrophilic polymer substance, 3-5 parts of cationic surfactant, 6-10 parts of polyaluminum chloride, and 2-3 parts of air-entraining agent. The low-temperature resistant and early-strength type alkali-free liquid accelerating agent of the present invention can improve the frost resistance of sulfate alkali-free accelerating agents, reduce the viscosity of cement slurry, promote the hydration reaction of C3S, shorten the setting time of concrete, and improve the later strength of concrete.

The invention relates to a method for separating sodium sulfate and sodium thiocyanate from a mixed waste salt solution, which comprises the following steps: carrying out catalytic oxidation, decoloration treatment and first solid-liquid separation on the mixed waste salt solution, and carrying out first evaporation concentration, first cooling crystallization and second solid-liquid separation on the obtained pretreated solution to obtain a sodium sulfate crude product and a filtrate, washing the sodium sulfate crude product, and carrying out third solid-liquid separation to obtain sodium sulfate; carrying out second evaporation concentration on the filtrate, adding sodium thiocyanate seed crystal, carrying out second cooling crystallization and fourth solid-liquid separation to obtain a sodium thiocyanate crude product and residual liquid, washing the sodium thiocyanate crude product, and carrying out fifth solid-liquid separation to obtain sodium thiocyanate; and circulating the washing waste liquid and the residual liquid to the pretreatment solution for mixing and recycling. According to the method, evaporation concentration is combined with cooling crystallization, sodium sulfate and sodium thiocyanate which are high in purity and extraction rate can be obtained through separation, and the whole preparation process is low in energy consumption and more environmentally friendly and integrally has good economic benefits.

The invention relates to the technical field of nucleic acid extraction and purification, in particular to a DNA and RNA co-extraction reaction reagent and an extraction method, the reaction reagent comprises a nucleic acid protective agent RP, a sample lysis binding solution LB, a protein washing solution WB1, a nucleic acid rinsing solution WB2 and a nucleic acid eluent EB; the nucleic acid protective agent RP comprises DTT, mercaptoethanol, TCEP and sodium hydroxide; the sample cracking binding solution LB comprises Tris-HCl, benzenesulfonic acid, sodium citrate, guanidine hydrochloride, guanidine isothiocyanate, guanidine thiocyanate, urea, triton 100, SDS, potassium chloride, sodium chloride, bromhexine, N-acetylcysteine, ambroxol hydrochloride, isopropanol and absolute ethyl alcohol; the protein washing liquid WB1 comprises Tris-HCl, benzenesulfonic acid, sodium citrate, guanidine hydrochloride, guanidine isothiocyanate, guanidine thiocyanate, urea, triton 100, sodium chloride, isopropanol and absolute ethyl alcohol; the nucleic acid rinsing liquid WB2 is prepared from Tris-HCl, sodium chloride, isopropanol and absolute ethyl alcohol; and the nucleic acid eluent EB is nuclease-free water. The reaction reagent can be used for rapidly and sufficiently enriching and purifying DNA and RNA of a sample at the same time.

The invention belongs to the technical field of analytical chemistry detection, and particularly relates to a construction method and application of a tobacco mosaic virus molecular imprinting sensor based on MIL-101 (Fe). The construction method comprises the following steps: by taking a tobacco mosaic virus TMV as a template virus, preparing a molecularly imprinted polymer MIPs with a TMV specific recognition cavity on the surface of MIL-101 (Fe) through a free radical polymerization reaction; the template virus is removed in the preparation process of the molecularly imprinted polymer MIPs, and a TMV specific recognition cavity of the molecularly imprinted polymer MIPs contains MIL-101 (Fe); the molecularly imprinted polymer MIPs is the tobacco mosaic virus molecularly imprinted sensor based on MIL-101 (Fe). Hydrochloric acid is introduced, so that the TMV specific recognition cavity structure of the molecularly imprinted polymer MIPs is cracked to release Fe < 3 + >, then potassium thiocyanate is added, and the Fe < 3 + > and KSCN are subjected to a complexation reaction to generate a red complex. And the complexation reaction of Fe < 3 + > and KSCN is used as a signal probe, the rapid semi-quantitative visual detection of the target virus TMV by naked eyes is realized, and quantitative detection and analysis are carried out through an ultraviolet spectrophotometer.

The invention provides a metal plate frame and fluororubber sealing assembly and a preparation method thereof, and the preparation method is applied to the technical field of semiconductor sealing and comprises the steps that S1, a metal plate frame is coated with an adhesive, dried and then cooled, and the adhesive is a trithiocyanuric acid derivative solution; s2, a cross-linking agent and an addition agent are added in the thin-passing mixing process of the perfluoroether elastomer, a mixed rubber compound is obtained, the addition agent comprises fluorinated silicon dioxide, fluorinated titanium dioxide or PFA micro powder, and the mass of the addition agent is 2-10% of the mass of the perfluoroether elastomer; and S3, the mixed rubber sheet is placed in a metal plate frame, the metal plate frame with the mixed rubber sheet is placed in a mold to be subjected to hot pressing vulcanization forming, then secondary vulcanization is conducted, then radiation vulcanization is conducted, and the assembly is obtained. The assembly prepared through the method is resistant to plasma etching and high in cleanliness, the bonding performance of the perfluoroether rubber and the metal plate frame is good, and the rate of finished products is high.

The invention relates to a method for generating a perovskite in-situ film through assistance of an interface protonation reaction, and the method comprises the following steps: S1, spin coating: carrying out the spin coating of a perovskite precursor solution on an acidic substrate, and forming a complex intermediate phase; the perovskite precursor solution comprises a tin halide, a monovalent cation halide, thiocyanate and an ethylenediamine derivative; s2, annealing: heating and annealing the intermediate phase of the complex on a heating stage, and inducing conversion of the intermediate phase of the complex to the tin-based perovskite thin film through a protonation reaction between the acidic substrate and the ethylenediamine derivative; the chemical structure of the tin-based perovskite is ASnX3. According to the method, the protonation reaction of the acidic substrate and the perovskite interface is utilized to assist in generating high-quality perovskite, the morphology of the thin film is effectively improved, and a high-brightness PeLED device is further prepared.

The invention relates to the technical field of hydrometallurgy production systems, in particular to a solvent regeneration control system for separating zirconium and hafnium through MIBK method centrifugal extraction, which comprises a control module used on a solvent regeneration neutralization reactor, and the control module comprises a heat exchange module; the heat exchange module comprises a heat exchange unit; the heat exchange unit comprises a cooling liquid flow adjusting unit, a cooling liquid temperature detecting unit and a cooling liquid pressure detecting unit. And the heat exchange module is used for controlling the flow of the cooling liquid, the pressure of the cooling liquid and the temperature of the cooling liquid of the heat exchange unit so as to adjust the temperature of the mixed phase in the neutralization reactor. The control system can monitor the flow, temperature and pressure of cooling liquid in real time, accurately control opening, closing and temperature adjustment of the heat exchange unit, quickly respond to temperature change of a mixed phase in the neutralization reactor, remove reaction heat in time, effectively avoid the problem of extraction system emulsification caused by high-temperature decomposition and polymerization of thiocyanic acid in the solvent regeneration process, and improve the extraction efficiency. The solvent regeneration efficiency and quality are ensured.

The utility model discloses a sodium thiocyanate anti-caking stock bin which comprises a bin body with a discharging port formed in the bottom, a feeding port and a mounting hole are formed in the top of the bin body, a dehumidification device is arranged in the mounting hole and comprises a filter screen, a sealing plate, a motor, auger blades and super absorbent resin particles, the sealing plate is in flange connection with the mounting hole, the filter screen is of a cylindrical structure, and the motor is connected with the motor. The top of the filter screen is fixedly connected with the lower surface of the sealing plate, the motor is installed on the sealing plate, the auger blade is located in the filter screen, the outer diameter of the auger blade is smaller than the diameter of the filter screen, the motor drives the auger blade to rotate, and the super absorbent resin particles are located in the filter screen. The moisture absorbent is arranged to adsorb moisture in the bin body, and the problem that sodium thiocyanate absorbs water and hardens is prevented.

The invention discloses premixed flow-state solidified soil and a preparation method thereof, and the premixed flow-state solidified soil comprises the following components in parts by weight: 100 parts of silty clay; 8 to 15 parts of a curing agent; 48 to 90 parts of water; wherein the curing agent comprises the following components: 10 to 15 parts of sulphoaluminate cement; 40 parts to 55 parts of superfine steel slag powder; 30 to 40 parts of fly ash; 0.5 to 1.5 parts of sodium silicate; 0.1 to 0.3 part of a foaming agent; 0.1 part to 0.2 part of sodium thiocyanate; 0.1 part to 0.2 part of hydroxymethyl cellulose; 0.05 part to 0.2 part of triisopropanolamine; 0.1 part to 0.5 part of calcium nitrate; and 0.5 to 1 part of a polycarboxylic acid water reducing agent. The preparation method of the premixed flow-state solidified soil is suitable for using silty clay as a raw material, and greatly improves the strength, compactness, fluidity and other properties of the premixed flow-state solidified soil.

The invention provides a self-repairing material containing a dynamic hindered thiourea bond as well as a preparation method and application of the self-repairing material. The self-repairing material containing the dynamic hindered thiourea bond is prepared from the following raw materials: polydimethylsiloxane, a diisothiocyanate compound, anhydrous piperazine and an optional amine cross-linking agent. The molar ratio of the four components is (3-4): 6: 2: (0-0.7); wherein the two ends of the polydimethylsiloxane are terminated by amino alkyl. A self-repairing material formed by polydimethylsiloxane, a diisothiocyanate monomer, anhydrous piperazine and an optional amine cross-linking agent according to a specific molar ratio is adopted, and a dynamic hindered thiourea bond is introduced into a polymer material, so that the self-repairing material is endowed with repairing capacity under the condition that the insulating property of the self-repairing material is not sacrificed; the self-repairing material not only has good insulating property and mechanical property, but also has excellent self-repairing property.

The invention provides a fully synthetic cutting fluid special for a copper part and a preparation process thereof. The fully synthetic cutting fluid special for the copper part comprises the following raw materials in parts by weight: 0.5-2.0 parts of a defoaming agent, 1.0-3.0 parts of an antioxidant, 0.5-2.0 parts of a corrosion inhibitor, 2.0-5.0 parts of a surfactant, 0.5-1.5 parts of a metal ion complexing agent and 80.0-100.0 parts of deionized water. Wherein the antioxidant is prepared from carnosol, daidzin and butylated hydroxytoluene. The carnosol and the daidzin can be used for reducing the oxidation reaction by capturing free radicals, and the butylated hydroxytoluene can be used for further enhancing the anti-oxidation effect by interrupting the oxidation chain reaction. And through the combined action and mutual complementation of different anti-oxidation mechanisms, a synergistic effect is formed, and oxidation of the copper part in the machining process is effectively prevented. Wherein the metal ion complexing agent is composed of isothiocyanate, polyaspartic acid and amino trimethylene phosphonic acid, multiple protection mechanisms are formed, and the corrosion resistance of the copper part is remarkably improved. And the existence of the metal ion complexing agent is also beneficial to improving the stability of the cutting fluid.

The invention discloses a preparation method of a low-chlorine composite environment-friendly coal transportation anti-freezing agent, and belongs to the technical field of anti-freezing solutions. The anti-freezing solution is used for solving the technical problems of complex components and poor anti-freezing and metal corrosion resistance of the anti-freezing solution for coal transportation in the prior art. The preparation method of the low-chlorine composite environment-friendly coal transportation anti-freezing agent comprises the following step: uniformly mixing the compound pour point depressant, the modified corrosion inhibitor, the thickening stabilizer and the industrial water to prepare the low-chlorine composite environment-friendly coal transportation anti-freezing agent. The compound pour point depressant comprises an organic pour point depressant and an inorganic pour point depressant; the organic pour point depressant is obtained by reacting unsaturated azole, sodium methallyl sulfonate and fumaric acid; the unsaturated nitrogen is obtained by reaction of an intermediate B and benzaldehyde, and the intermediate B is obtained by reaction of triazole and ethyl chloroacetate; the modified corrosion inhibitor is obtained by carrying out a reaction on potassium thiocyanate, benzoyl chloride and chitosan vanillin Schiff base. The anti-freezing solution prepared by the invention has the advantages of moderate fluidity, good metal corrosion resistance and good anti-freezing performance.

The invention discloses an autotrophic nitrogen removal and detoxification device and method for treating coking wastewater through two-stage low-oxygen short-cut nitrification, sulfur autotrophic denitrification and anaerobic ammonia oxidation, and belongs to the field of sewage treatment. The device comprises a water inlet tank, a sequencing batch reactor, a middle water tank and an up-flow anaerobic sludge blanket reactor. The method comprises the following steps: enabling the coking wastewater which is subjected to carbon capture and contains ammonia nitrogen and thiocyanate to enter a sequencing batch reactor, oxidizing the ammonia nitrogen into nitrite under a limited oxygen condition, and generating nitrogen, sulfate and ammonia nitrogen from the thiocyanate and the nitrite by autotrophic denitrifying bacteria; reaction effluent mixed with coking wastewater enters an upflow anaerobic sludge blanket, and anaerobic ammonium oxidation bacteria convert ammonia nitrogen and nitrite into nitrogen and generate a small amount of nitrate; and the residual nitrate, nitrite and thiocyanate are continuously and thoroughly removed through the sulfur autotrophic denitrification effect. The method provides a new idea for economical and efficient autotrophic nitrogen removal and detoxification of the coking wastewater containing thiocyanate and ammonia nitrogen.

The invention discloses lithium sulfide, a two-step double decomposition preparation method and application of the lithium sulfide in an all-solid-state battery, and belongs to the technical field of solid-state batteries. According to the preparation method, a two-step decomposition synthesis technology is adopted, lithium carbonate and ammonium thiocyanate are used as raw materials, the raw materials are uniformly mixed and then placed in a high-temperature reactor, a step heating sintering procedure is completed in an inert gas atmosphere, and the purpose of fully decomposing and converting the raw materials is achieved by accurately controlling the temperature and the time; after a product is obtained through reaction, the high-purity lithium sulfide material is obtained after the product is cooled to the room temperature. The method for preparing the lithium sulfide is low in raw material cost, simple in reactant formula and free of side reaction in the reaction process, and the finally generated product is few in impurity, high in purity and good in crystallinity.

The invention discloses a polymer composite separator for a lead-acid storage battery and a preparation method thereof, and belongs to the technical field of separator preparation, the polymer composite separator comprises the following raw materials by weight: 40-55 parts of ultra-high molecular weight polyethylene, 0.5-1 part of an initiator, 0.5-1.5 parts of sodium allyl thioglutamate, 105-115 parts of silicon dioxide, 10-20 parts of alkyl succinic anhydride modified cyclodextrin, and 180-260 parts of filling oil; the preparation raw materials of the sodium allyl thioglutamate comprise glutamic acid and allyl isothiocyanate, the sodium allyl thioglutamate and the alkyl succinic anhydride modified cyclodextrin are introduced into the preparation raw materials of a traditional PE partition plate, and finally the prepared polymer composite partition plate for the lead-acid storage battery has high porosity and low resistivity; and the anti-oxidation performance is excellent, the puncture-resistant strength is high, and the development of the lead-acid storage battery industry towards the direction of high energy density and long cycle life is facilitated.

The invention discloses a trigeminal neuralgia treatment method, and relates to the technical field of trigeminal neuralgia treatment. The direct effect of the M2 on the proinflammatory and pain induction characteristics of the Schwann cells can play an important role in the multi-aspect analgesic effect of the M2; the microenvironment around nerves can be changed by increasing m < 2 > m macrophages after SHED-CM, so that NP is cured; immunohistochemical analysis shows that the number of p near-end side CD206 + F4 / 80 + macrophages of qualified thiocyanate is remarkably increased through sheet-CM treatment, however, TNF-alpha + S100beta + proinflammatory Schwann cells and TNF-alpha + F4 / 80 + M1 macrophages are remarkably reduced after sheet-CM treatment.

The invention discloses an MOFs adsorbent of cumene and a preparation method and application thereof, and belongs to the technical field of adsorbent preparation, and the preparation method comprises the following steps: step 1, preparing an MIL-101 adsorbent; 2, the MIL-101 adsorbent is soaked in a thiocyanate solution for 10 min to 30 min, centrifugation, washing and drying are conducted, and the MOFs adsorbent of isopropyl benzene is obtained. The adsorption capacity of the MIL-101 adsorbent post-treated by the sodium thiocyanate to cumene gas is remarkably improved. Due to the introduction of sodium thiocyanate, a new functional group is grafted, and a new adsorption site is introduced, so that the adsorption capacity of the adsorbent on cumene gas is remarkably improved.

The invention relates to the technical field of sewage treatment in environmental protection, in particular to a high-valence metal cation composite remover and a use method of the high-valence metal cation composite remover. The polyhydroxy compound, the polycarboxyl compound and the polyamido compound are one or more than two of dithiomethyl carbamate, dithioethyl carbamate, dithiopiperazine dicarboxylate, trithiocyanate, hyperbranched vinylamine dithiocarbamate and dodecyl sulfonate, and the polyhydroxy compound, the polycarboxyl compound and the polyamido compound are one or more than two of dithiomethyl carbamate, dithioethyl carbamate, dithiopiperazine dicarboxylate, trithiocyanate, hyperbranched vinylamine dithiocarbamate and dodecyl sulfonate; the inorganic matter is one or more than two of silicate, phosphate and carbonate. According to the method, after the ammonia water is added, the composite removing agent is added for reaction and precipitation, the method has the advantages that the technological process is simple, the agent adding amount is small, the removal rate of high-valence metal cations reaches 99.9% or above, the operation cost is low, the pH value in the process is low, ammonia volatilization waste is inhibited and controlled, and the problems of safety and environmental protection are solved, and the method is suitable for industrial production.

To provide a metal separation method that can efficiently separate and / or recover a metal which is desired to be separated and / or recovered, from an aqueous solution containing the metal.SOLUTION: The metal separation method is provided that includes a process of bringing the aqueous solution containing the metal into contact with a metal separation agent which contains a salt represented by the following formula (I) (component A), thiocyanic acid (component B) and a water-insoluble organic solvent (component C), and separating the metal from an aqueous phase to an organic phase. In the formula (I), R1 is a hydrocarbon group which has 6 or more and 22 or less carbon atoms, and may have an ester group, an amide group and / or an ether group; R2 and R3 are each independently a hydrocarbon group which has 6 or more and 22 or less carbon atoms and may have an ester group, an amide group and / or an ether group, or an alkyl group which has 1 or more and 4 or less carbon atoms and may have a hydroxyl group; R4 is an alkyl group having 1 or more and 6 or less carbon atoms, or a hydrogen atom; and X- is an anion.SELECTED DRAWING: None

The invention relates to the technical field of photocatalytic materials, and particularly provides a carbon nitride / indium zinc sulfide / polyacid composite material as well as a preparation method and application thereof. The invention aims to solve the problems of high photogenerated charge recombination rate and narrow spectral range when polyacid is used as a photocatalytic hydrogen production catalytic material, and provides a preparation method of a photocatalytic material capable of improving the hydrogen production performance. The method comprises the following steps: taking tubular carbon nitride synthesized by mixing melamine, trithiocyanuric acid and urea according to a certain proportion as a precursor; lamellar indium zinc sulfide is grown on the tubular carbon nitride in situ in a hot reflux mode, and a carbon nitride / indium zinc sulfide heterogeneous material is obtained; and finally, adding the carbon nitride / indium zinc sulfide heterogeneous material into an HCl-Tris buffer solution, carrying out ultrasonic dispersion, adding dopamine hydrochloride as a binder, adding cobalt substituted phosphotungstate Na10 [Co4 (H2O) 2 (alpha-PW9O34)], and stirring at room temperature to obtain the carbon nitride / indium zinc sulfide / polyacid composite material. The preparation of the composite material solves the problems that polyacid is easy to dissolve in water, the spectral response range is narrow, and indium zinc sulfide photo-induced electrons and holes are easy to compound, the separation of photo-induced charges is promoted, and meanwhile, the specific surface area of the material is increased due to the unique tubular lamellar multilevel structure, so that more catalytic active sites can be exposed, and the catalytic activity of the material is improved. A technical route is provided for the development of the high-performance multi-acid-group photocatalyst.

The invention discloses a low-carbon cementing material for coal mine paste filling, and belongs to the technical field of coal mine filling. The invention discloses a low-carbon cementing material for coal mine paste filling. The low-carbon cementing material comprises the following raw materials in parts by mass: 200-240 parts of furnace slag, 50-80 parts of carbide slag, 40-65 parts of desulfurized gypsum, 330-360 parts of fly ash, 10-20 parts of an active activator and 5-10 parts of a coagulant, wherein the active exciting agent is a mixed compound of sodium aluminate and sodium orthosilicate; the coagulant is a mixed compound of sodium thiocyanate and anhydrous calcium chloride. The cementing material adopts all solid waste raw materials, can be used for preparing a coal mine paste filling material, can reduce the filling cost of coal mining, improves the working efficiency of coal mining, and is beneficial to promoting the healthy and sustainable development of coal mine enterprises.

The invention discloses synchronous test paper for Fe < 3 + > and Fe < 2 + > as well as a preparation method and application of the synchronous test paper, and effectively solves the problem that high-concentration Fe < 3 + > and Fe < 2 + > in a boiler chemical cleaning solution are difficult to rapidly, accurately and simultaneously detect. The detection test paper is provided with isolated first and second color developing regions, provides an independent space for Fe < 3 + > and total iron detection, and is anti-interference and accurate. A potassium thiocyanate-hydrochloric acid color developing agent is specially used for measuring Fe < 3 + > in the first color developing area, a phenanthroline-ascorbic acid color developing agent is used for measuring total iron in the second color developing area, and the concentration of Fe < 2 + > is calculated in a combined mode. A standard colorimetric card is matched, color blocks accurately correspond to the concentration range (0-5000 mg / L), the common iron ion concentration is covered, and a comparison basis is provided for detection. During detection, information can be rapidly and visually obtained by comparing the color of the color developing area with the color chart, operation is easy and convenient, complex equipment and professionals are not needed, and field requirements are met. And the scheme is resistant to interference of high-concentration and complex components, and the result is real and reliable.