505 results about "Thiocyanic acid" patented technology

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 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 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 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 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 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.

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.

The invention provides a preparation method and device of prothioconazole. The preparation method comprises the following steps: carrying out Grignard reaction on o-chlorobenzyl chloride and magnesium powder in a mixed solvent of toluene and 2-methyltetrahydrofuran; the method comprises the following steps: carrying out Grignard addition reaction on a Grignard reagent and 2-chloro-1-(1-chlorocyclopropyl) ethanone; the preparation method comprises the following steps: carrying out substitution reaction on 1-chloro-2-(1-chlorocyclopropyl)-3-(2-chlorphenyl) propanol and hydrazine hydrate in an alcohol solvent; the preparation method comprises the following steps: carrying out ring closing reaction on 2-(1-chlorocyclopropyl)-1-(2-chlorphenyl)-3-hydrazino-2-alcohol, a formaldehyde solution, a sodium thiocyanate solution and a sodium hydrogen sulfate solution; the preparation method comprises the following steps: carrying out oxidation reaction on 2-(2-chlorocyclopropyl)-3-(2-chlorphenyl)-2-hydroxypropyl)-1, 2, 4-triazolidine-3-thioketone, air and inorganic alkali, so as to obtain prothioconazole. The method can improve the efficiency of the oxidation reaction and the yield and purity of prothioconazole, and is more suitable for industrial production of prothioconazole.

The application discloses a low-alkalinity inhibitor for pyrite in secondary copper-sulfur ore and a method. The method comprises the following steps: adding trisodium trithiocyanate in the process of ore grinding; and adding a second inhibitor to adjust the pH value of the ore slurry to 9.5-10.5 in the process of flotation. The second inhibitor is calcium oxide and an organic copolymer, the organic copolymer is an acrylamide-acrylic acid-maleic anhydride copolymer, and the molecular weight of the organic copolymer is 5000-10000. The method can reduce the activation of copper ions on pyrite, realize low-alkalinity inhibition of pyrite, and avoid problems such as high pH value of mineral processing waste water, easy pipe blockage, and low recovery rate of precious metals.

The invention discloses a preparation method of a polymer carbon nitride / tin sulfide (PCN (at) SnS2) heterojunction photoanode, which comprises the following steps of: constructing the PCN (at) SnS2 heterojunction photoanode in situ on a conductive substrate (FTO) by combining an electrochemical deposition method and a chemical vapor deposition method, adding anhydrous stannous chloride into ethanol for dissolving, spin-coating stannous ions on the surface of the conductive substrate, and oxidizing in an air atmosphere; the preparation method comprises the following steps: adding stannous sulfate and sodium citrate into deionized water, and stirring for dissolving; the prepared conductive substrate is used as a working electrode, and a tin film is deposited on the surface of the conductive substrate by adopting a three-electrode system; dicyandiamide, cyanuric acid and potassium thiocyanate are ground and mixed evenly and then put into a porcelain boat, and the conductive substrate deposited with the tin film is placed on the surface of the precursor and wrapped with aluminum foil; placing the porcelain boat in a tubular furnace, reacting in a nitrogen atmosphere, and cooling to room temperature to form PCN-coated SnS2 on the surface of the FTO. The method improves the problems of insufficient light absorption range and high electron-hole recombination rate of the polymer carbon nitride material, and has the advantages of simplicity, controllability and the like.

The invention discloses a low-temperature-resistant early-strength alkali-free liquid accelerator and a preparation method thereof, and belongs to the technical field of alkali-free liquid accelerators, the low-temperature-resistant early-strength alkali-free liquid accelerator comprises 12-15 parts of aluminum sulfate, 2-5 parts of beta-cyclodextrin embedded sodium thiocyanate, 5-8 parts of a calcium hydroxide inactivator, 3-5 parts of fiber, 5-10 parts of a hydrophilic polymer substance, 3-5 parts of a cationic surfactant, 6-10 parts of polyaluminum chloride, and 2-3 parts of an air entraining agent. The low-temperature-resistant early-strength alkali-free liquid accelerator can improve the frost resistance of a sulfate alkali-free accelerator, reduce the viscosity of cement paste, promote the hydration reaction of C3S, shorten the setting time of concrete and improve the later strength of the concrete.

The invention discloses a preparation method of a 3-thiocyano indole derivative. According to the method, indole or substituted indole is taken as a substrate, ammonium thiocyanate is taken as a reactant, N-fluorobenzenesulfonamide (NFSI) is taken as an accelerant, reaction is carried out for 0.5-3 hours at room temperature, and C3-thiocyanated indole can be obtained. The method has the advantages of easily available reaction raw materials, mild reaction conditions and short reaction time, is suitable for industrial production, and provides a new method and different reaction mechanisms for thiocyanation of the C3 site of the indole compound.

The invention relates to the technical field of perovskite, and discloses a perovskite thin film, a preparation method thereof and a perovskite solar cell, the chemical formula of the perovskite thin film is ABX3, A is selected from at least two mixed cations of cesium, formamidine and methyl ammonium, B is lead, and X is mixed halogen of iodine and bromine; the thickness of the film is 300-600 nm, the grain size is 100-500 nm, the surface roughness Ra is smaller than or equal to 10 nm, guanidine thiocyanate is doped, the doping amount is 0.5-2.5% of the total mass of perovskite, and the molar ratio of iodine to bromine in mixed halogen changes in a gradient mode in the thickness direction of the film. By adopting the design of mixed cations and gradient halogen, the grain size of the prepared perovskite thin film is obviously increased, the surface roughness is obviously reduced, and the PL fluorescence lifetime is greatly prolonged, so that the service life of a carrier is obviously prolonged, and the effects of increasing the grain size of the perovskite thin film, reducing surface defects and enhancing thermal stability are achieved.

The invention belongs to the technical field of copper-sulfur ore flotation, and particularly relates to a novel double-ligand chalcopyrite collecting agent and a preparation method and application thereof. According to the collecting agent, an intermediate oxalyl diisothiocyanate is mainly prepared from oxalyl chloride and thiocyanate through a thiocyanate method, and then series amine / alcohol is added through a one-pot method to prepare the collecting agent. According to the collecting agent, more stable double-bond adsorption can be formed on the surface of chalcopyrite, and the formed double-chelate ring structure is more stable than single-bond adsorption of xanthate, black powder and the like of a traditional chalcopyrite collecting agent. The collecting agent has higher collecting capacity and excellent selectivity, efficient copper-sulfur separation can be achieved under the low-alkali condition, the preparation technology of the collecting agent has the advantages of being simple, easy to operate and the like, and chalcopyrite flotation and separation of chalcopyrite and pyrite can be promoted.

The invention discloses a method for testing the concentration of ferric ions in a citric acid cleaning solution, when the cleaning solution is combined with a color developing agent, namely a potassium thiocyanate solution, the cleaning solution is acidized in advance, firstly, citric acid is easy to form a stable complex with Fe < 3 + > at a relatively high pH value to hinder a subsequent color developing reaction and titration, and the concentration of ferric ions in the citric acid cleaning solution is not influenced; the protonated citric acid is subjected to pre-acidification treatment, so that the complexing ability of the protonated citric acid is destroyed, free Fe < 3 + > is released, hydrolysis of Fe < 3 + > is inhibited, and Fe < 3 + > is ensured to participate in subsequent reaction in an ionic state; besides, the acid environment can reduce the oxidation rate of Fe < 2 + >, avoid the introduction of additional errors due to the fact that Fe < 2 + > is oxidized into Fe < 3 + >, and improve the accuracy of a Fe < 3 + > concentration test result, so that the citric acid complexing effect is eliminated through the pre-acidification treatment, meanwhile, the oxidation interference of Fe < 2 + > is inhibited, and the detection precision is improved.

The invention discloses a composite lubricant containing a porous covalent organic framework as well as a preparation method and application of the composite lubricant. The composite lubricant comprises a porous covalent organic framework material and an ionic liquid, the ionic liquid is 1-butyl-3-methylimidazolium thiocyanate, 1-ethyl-3-methylimidazolium tetrafluoroborate or 1-butyl-3-methylimidazolium hexafluorophosphate, and the porous covalent organic framework material is a porous covalent organic framework material. According to the invention, a porous covalent organic framework (COF) is added into ionic liquid (ILs) as an additive, the ionic liquid provides an ideal ionic microenvironment or is used as an active substance to endow the organic framework with extra functions such as conductivity, fluidity and dispersibility, and the COF can also improve the corrosivity of the ionic liquid.

The present invention provides an antibody fluorescent labeling kit and a labeling method thereof, the kit comprising the following raw materials: 0.4-0.6mg fluorescein isothiocyanate, 500-700μL dimethyl sulfoxide, 2.0-3.5mL labeling buffer, 1.5-2.5mL labeling preservation solution, 0.1-0.3mL sodium bicarbonate solution, 1 centrifugal column, 3 EP tubes. The labeling method of the present invention completes the fluorescent labeling of the antibody by the following steps: S1, preparing antibody solution, S2, adjusting the pH of the antibody solution, S3, preparing fluorescein isothiocyanate solution, S4, preparing markers, S5, centrifugal column balancing treatment, S6, preparing fluorescently labeled antibodies, S7, fluorescently labeled antibody dilution and preservation. The kit of the present invention can quickly and conveniently label antibodies, and there is no need to go through a dialysis step during the entire labeling process, thereby simplifying the labeling process, saving labeling time, and being both convenient and efficient. The fluorescently labeled antibody prepared by the present invention has high fluorescence intensity and strong stability, and can still maintain strong fluorescence intensity even after being stored for 12 months.

The invention relates to a method for regulating and deacidifying in a bioleaching process of low-grade copper sulphide ore, aiming at the problem of excessive acid caused by excessive oxidation of pyrite in a dump leaching system, a thiocyanate bactericide is added into the bioleaching system of the low-grade copper sulphide ore, and the thiocyanate bactericide is dissolved in a spray liquid of the bioleaching system, and is added into the spray liquid of the bioleaching system; under the catalytic action of mineral leaching microorganisms, oxidation of ferrous ions is enhanced, so that the oxidation-reduction potential of a solution is increased, oxidation of pyrite is intensified, acid accumulation is excessive, the thiocyanate bactericide can remarkably inhibit the activity of part of sulfur-oxidizing bacteria and even kill part of sulfur-oxidizing bacteria, and therefore the activity of ferrous oxide is reduced; compared with the prior art, the method has the advantages that the sulfur oxidation activity of microorganisms is greatly influenced, but the oxidation influence on iron is relatively small, so that the acid leaching is reduced under the condition that the copper leaching of the copper sulfide ore is not influenced, the copper leaching is not influenced, the acid leaching is reduced, the production cost is reduced, the environmental influence is reduced, and the like.

The invention belongs to the technical field of medicines, and particularly relates to application of a sulfydryl derivative in preparation of a weight-losing product. The invention provides an application of a sulfydryl derivative in preparation of a weight-losing product, and the sulfydryl derivative is selected from one or more of 2, 3-dimercaptopropionic acid, dimercaptopropanesulfonic acid, dimercaptosuccinic acid, dimercaptopropanol, trithiocyanuric acid and salts or esters of the compounds. Through animal experiments, the weight of mice is detected, and it is fully verified that the sulfydryl derivative, especially dimercaptosuccinic acid and trithiocyanuric acid, has a remarkable weight losing effect and can effectively inhibit weight increase.