82 results about "Hydroxylammonium chloride" patented technology

The invention relates to construction of an algal toxin Raman sensor adopting a gold nanoflower-silver nanoparticle bimetallic nano assembly and belongs to the field of material chemical application. The construction mainly comprises the contents that a simple and convenient synthetic method of gold nanoflowers with controllable surface bulges is provided; by controlling concentration of hydroxylamine hydrochloride, gold nanoflower structures with different bulge sizes can be obtained; based on a Y-shaped aptamer assembling configuration, the old nanoflower-silver nanoparticle bimetallic nano assembly is prepared; a spacing size and intensity variation of an electromagnetic field of the nano assembly under the condition of multiple hot spots between double metals are researched; Raman signal amplifying intensity of the assembly is analyzed; and the Raman sensor with a high speed, high specificity and high sensitivity for algal toxin is constructed.

The invention discloses a preparation method of graphene-modified activated carbon for a supercapacitor and belongs to the technical field of electrode material preparation. The method comprises the steps of taking one or more of traditional shell, wood and straw activated carbon as raw materials, removing impurities, matching graphene oxide with specific parameters, performing high-temperature activation in a deionized water solution, reducing the graphene oxide to graphite with ammonium hydroxide and hydroxylammonium chloride, and performing dewatering and drying to obtain the graphene-modified activated carbon for the supercapacitor. The activated carbon prepared with the method is 1900-2010 m<2> in specific surface area and 0.30-0.33 g / ml in tap density. The supercapacitor made of the activated carbon is above 305 F / g in mass specific capacitance and 193 F / cm<2> in volume specific capacitance.

The invention provides a method combining an oxidizing composite reagent and activated carbon to remove arsenic in water. The oxidizing composite reagent is added into the water and stirred, and then the activated carbon is utilized to adsorb the arsenic. The oxidizing composite reagent is formed by compositing potassium ferrate, chlorine dioxide, sodium peroxide, potassium persulfate, potassium monopersulfate, ferrous sulfate, ferric sulfate and hydroxylamine hydrochloride, or is formed by compositing potassium peroxide, sodium peroxide, sodium monopersulfate, iron chloride and hydroxylaminehydrochloride, or is formed by compositing calcium peroxide, sodium hypochlorite, calcium monopersulfate, calcium persulfate, cerium chloride, ferric chloride, cerous sulfate and humus, or is formed by compositing cobalt chloride, ammonium monopersulfate, ammonium persulfate, cerous sulfate, sodium peroxide and hydroxylamine hydrochloride. The method can not only remove the arsenic in drinking water, underground water and surface water rapidly, efficiently, conveniently and safely, but also effectively reduce concentration of the arsenic in sewage containing arsenic and effluent of sewage secondary sedimentation tanks, and simultaneously can have good recovery effect on lakes and inland seawater polluted by the arsenic.

The invention relates to a low-grade bauxite positive floatation collecting agent. The collecting agent comprises, by weight, 5-25 parts of gutter oil treating fluid, 65-85 parts of high-iodine fatty acid, 5-8 parts of sodium hydroxide, 0.5-1 part of an MOA emulgator in a mixed preparation manner; and the gutter oil treating fluid is prepared from gutter oil, methyl alcohol or ethyl alcohol, hydroxylammonium chloride and an alkaline solution according to the weight ratio being 5:1:2:1. According to the low-grade bauxite positive floatation collecting agent, the gutter oil is made profitable; pretreatment modification is carried out on the gutter oil, the gutter oil and other agents are compounded to obtain the novel collecting agent, a series of problems such as large agent using amount, difficult foam transportation, poor beneficiation and separation indexes and high cost are solved to a large extent, efficient resource utilization, energy saving, emission reduction, cost reduction and efficiency increasing are facilitated, and the low-grade bauxite positive floatation collecting agent is of great significance in improving comprehensive competitive power of bauxite dressing plants.

The invention relates to a method for producing calcium formate by using industrial waste liquid, which belongs to preparation of carboxylate, in particular to a method for producing the calcium formate by using oxammonium hydrochloride industrial waste liquid as a raw material. The method is characterized in that: in the production technology process of oxammonium hydrochloride, waste liquid containing methanoic acid, which is generated by a nitromethane muriatic hydrolyzation generation device, is used as the raw material; and the method comprises the following operation steps: a. extractingmethanoic acid solution and sodium chloride of a byproduct; b. synthesizing the calcium formate; c. inspecting the quality and packaging and warehousing after qualification. The method for producingthe calcium formate by using the oxammonium hydrochloride industrial waste liquid as the raw material saves resources and protects the environment, has simple process, low production cost and high calcium formate yield, not only can produce the calcium formate meeting the requirement of feed additive users, but also produce the ideal calcium formate which is suitable for building materials and road surface construction strengthening agents and meets the requirement of users.

The invention provides a sulfate trivalent-chromium chromeplate electroplating solution and an application method thereof. Amine compounds and organic compounds containing nitrogen, sulfur, acetylenicalcohol and the like, which are used as brighteners, are added into a basic electroplating solution containing chromium sulfate and conducting salt; hydroxylamine hydrochloride or ascorbic acid is added for stabilizing trivalent chromium in the electroplating solution, substances such as polyethers and polyalcohols are added as surfactants, and low carbon chain material complexing agents such asoxalic acid, propionic acid, glycine and succinic acid are added for complexing trivalent chromium ions, so that the cathodic reduction of the trivalent chromium complex ions is greatly promoted, andthe tolerance of the electroplating solution to impurities and the stability of the electroplating solution are further improved; the brighteners and the surfactants also can promote the cathodic reduction of the trivalent chromium ions, and appropriate processing parameters are cooperatively set, so that the reaction effects of all components can be greatly improved; the sulfate trivalent-chromium chromeplate electroplating solution can enable plating to have excellent appearance, morphology, structure, binding force and corrosion resistance, and enables the plating not to have surface defects such as pinholes and stripes.

The invention provides a cross-linked polyacrylonitrile-based amidoxime fiber. A method for preparing the cross-linked polyacrylonitrile-based amidoxime fiber includes steps of (1), carrying out cross-linking on polyacrylonitrile fibers by the aid of triethylenetetramine to obtain cross-linked polyacrylonitrile fibers; (2), carrying out amidoximation on the cross-linked polyacrylonitrile fibers obtained at the previous step by the aid of hydroxylammonium chloride to obtain the cross-linked polyacrylonitrile-based amidoxime fiber. The cross-linked polyacrylonitrile-based amidoxime fiber and the method have the advantages that the problem that common amidoxime fibers cannot be directly applied to Bayer solution for extracting gallium can be effectively solved; the cross-linked polyacrylonitrile-based amidoxime fiber is high in mechanical strength and high in gallium adsorption capacity and selectivity and has a broad market prospect.

The invention discloses a method for synthesizing 4, 4-dimethyl isooxazole-3-ketone in the field of agricultural weedicide, taking hydroxylammonium chloride, using ether as catalyst, using dichloromethane water solution as solvent, controlling the reacting temperature at 0-30 deg.C, in turn dropping chloro tert-acyl chloride and sodium hydroxide, keeping pH value of solution 6-10, then blending and reacting, placing still and stratifying, using dichloromethane to extract, desolventizing and obtaining the product. And the product yield can reach 95%, and the product content is greater than 90%. The invention can be used in producing agricultural weedicide clomazone.

The invention discloses an air purification material capable of removing formaldehyde, acetaldehyde, acetic acid and ammonia and a preparation method of the air purification material. The preparation method comprises: performing acidizing treatment, washing and drying of an air purification material carrier to prepare an acidized air purification material carrier; mixing water, hydroxylammonium chloride, hexamethylene tetramine, chitosan, and orotic acid according to a mass ratio of 10:0.5-1.0:0.2-0.4:0.05-0.12:0.1-0.3 to prepare a mixed solution; and soaking the acidized air purification material carrier into the mixed solution for reaction, and drying the obtained product after reaction to obtain the air purification material. The air purification material provided in the invention has an excellent adsorption effect on formaldehyde, particularly has a preferable removal effect on low-concentration formaldehyde, and further has an excellent removal effect on acetaldehyde, acetic acid and ammonia. The air purification material is convenient to use, simple in preparation process, and good in practicality.

The invention discloses a uranium adsorbent. The uranium adsorbent comprises carbon nanotubes and amidoxime groups grafted to the surfaces of the carbon nanotubes by low temperature plasma. The uranium adsorbent has the advantages of large specific surface area, high selectivity, large adsorption capacity, high speed, environmental friendliness and good uranium adsorption ability. The invention also discloses a preparation method of the uranium adsorbent. The method comprises the following steps: S1, treating the carbon nanotubes by the low temperature plasma to obtain amidated carbon nanotubes; S2, preparing an aqueous hydroxylamine hydrochloride solution, and adjusting the pH value of the solution to 7; and S3, adding the amidated carbon nanotubes to the neutral aqueous hydroxylamine hydrochloride solution, carrying out a reaction at 60-80 DEG C for at least 8 h, washing the obtained product until the product is neutral, and drying the washed product to obtain the uranium adsorbent.The preparation method makes the surfaces of the carbon nanotubes grafted with the amidoxime groups by the low-temperature plasma technology, so the method has the advantages of simple process, low cost, no concentrated acids or other raw materials, environment friendliness, and firmness in combination of the carbon nanotubes and the amidoxime groups.

The invention relates to a method for industrialized producing 2.6-dichlorobenzonitrile, adopting 6-chloro-o-nitrotoluene chloro-o-nitrotoluene as raw material to make chlorination reaction under the action of catalyst, then making cyanogenation reaction with formic acid and hydroxylammonium chloride, and refining again and again to obtain 2.6-dichlorobenzonitrile whose content is 99.8% above. The produced 2.6- dichlorobenzonitrile is a white powdery crystal, purity 99.8%-9995%, melting point 141.0 deg.C -144.0 deg.C, water ratio <=01%, and product yield up to 64%.

A process for preparing the emulsion polymerization rubber (butadiene styrene rubber) not containing nitroso compound features that the components D, E and S are used as the reaction terminating agents to replace original SDD, DEHA and sodium nitrite in a defined manner. The said D is the monoalkyl or monoaryl bithioaminoformate. The said E is the hydroxyamine hydrochloride (or sulfate). The saidS is sodium sulfite or hydrated sodium sulfide.

Disclosed is magnetic organic fertilizer containing sodium alginate and with excellent moisture-preservation and fertilizer-conservation performance. The fertilizer is characterized in that firstly, a neutral mixed solution with sodium hydroxide, hydroxylammonium chloride and isopropyl alcohol is prepared; secondly, active hydroxyl in the sodium alginate reacts with ethyl chloroacetate to modify the sodium alginate; thirdly, magnetic particles are prepared, and ternary grafting is conducted on the magnetic particles with the sodium alginate, acrylic acid and starch; finally, the magnetic organic fertilizer containing the sodium alginate and with the excellent moisture-preservation and fertilizer-conservation performance is obtained through mixing and granulation. The organic fertilizer is excellent in moisture-preservation and fertilizer-conservation performance, comprehensive in nutrition and magnetic, the magnetism can increase the utilization rate of nutrients to achieve a significant yield-increasing effect, and the organic fertilizer is suitable for crops such as grains, vegetables, fruit and grass.

The invention discloses a gold film material-based microring electrode and a production method thereof. The method comprises the following steps: self-assembling a polydopamine layer on the inner wall of a hydroxylated capillary tube, self-assembling a single layer of gold or platinum nanoparticles through using electrostatic effect, Van der Waals force and hydrogen bond between amino and hydroxy groups and nanogold, and introducing a chemical plating solution containing auric chloride acid and hydroxylamine hydrochloride into the tube to grow the gold or platinum film. The method for producing the gold film or platinum film microelectrode is simple, is easy to operate, and allows the uniform thickness-controllable gold film or platinum film to be formed on the inner wall of a glass or quartz tube. The single microelectrode produced through the method can be potentially applied to release analysis of in vivo in-situ or cell surface chemical substances.

The invention discloses a method for preparing a rhenium diselenide nano-sheet and belongs to the field of preparation of a novel two-dimensional nano material. The rhenium diselenide nano-sheet is formed through reducing a rhenium source and a selenium source through hydroxylammonium chloride by utilizing a hydrothermal method, reacting to obtain rhenium diselenide nano-particles and assembling the rhenium diselenide nano-particles. By adopting the method provided by the invention, the disadvantages of an existing preparation process of the rhenium diselenide nano-sheet that a preparation period is long, the cost is high, the operation is complicated and the like are overcome; the method is simple in production operation and good in repeatability and a reaction period is shortened; raw materials for producing are cheap and easy to obtain; the method has moderate reaction conditions, and energy consumption and cost are reduced, so that the method is suitable for large-scale production; the invention provides a reliable sample preparation method for application of the rhenium diselenide nano-sheet in electrical and optical aspects, and provides more potential scientific evidences and technical supports for enabling the rhenium diselenide nano-sheet to become a novel photoelectric material in the future.

The invention discloses a method for measuring the calcium oxide and magnesium oxide content of a tundish covering agent. The method has the advantages of being higher in speed, accuracy and efficiency. The method comprises the following steps: dissolving a test sample with hydrochloric acid and hydrofluoric acid, adding nitric acid, adding perchloric acid for smoking, adding hydrochloric acid after cooling, and performing heating to dissolve salts; adjusting the pH value to 7 with ammonia water, heating the test solution till the test solution boils, taking down and slightly cooling the test solution, filtering the test solution in a volumetric flask, washing precipitates for 7 to 8 times with a hot ammonium chloride solution, diluting the solution to a scale for volume fixation after cooling, equally dividing the solution into two parts for putting into two beakers; for one of the two breakers, adding small amounts of triethanolamine, water and hydroxylammonium chloride, adding a potassium hydroxide solution to adjust the pH value to 12, adding a proper amount of calcein, and performing titration with an EDTA standard solution until fluorescence green disappears to obtain the amount of calcium; for the other one of the two breakers, adding small amounts of triethanolamine, water and hydroxylammonium chloride, adding an ammonia-ammonium chloride buffer solution to adjust the pH value to 10, taking eriochrome black T as an indicator, and performing titration with the EDTA standard solution until the solution is pure blue to obtain the total amount of calcium and magnesium.

The invention discloses a preparation method of hydroxylammonium chloride. The hydroxylammonium chloride is prepared by taking diacetylmonoxime hydrochloride and water as raw materials to react. The preparation method of the hydroxylammonium chloride has the advantages of simple process, moderate reaction conditions, low cost, and environmental friendless.

The invention provides a preparation method and application of a spodumene ore flotation collector and belongs to the technical field of ore separation. The preparation method comprises the followingsteps that (1) gutter oil, methyl alcohol and concentrated sulphuric acid are mixed according to the mass ratio being (1.0-1.2):(1.1-1.8):(0.05-0.09) and stirred for a reaction under the temperature of 60-90 DEG C for 5-12 h so as to obtain a product 1; (2) hydroxylammonium chloride, water and sodium hydroxide are mixed according to the mass ratio being (1.0-1.3):(6.4-9.3):(1.9-2.4) and stirred for a reaction under the temperature of 20-30 DEG C for 1-3 h so as to obtain a product 2; and (3) the product 1 is added into the product 2 according to the mass ratio of the product 1 to the product 2being (1.0-1.2):(0.28-0.48), the product 1 and the product 2 are stirred for a reaction under the temperature of 40-60 DEG C for 4-6 h, and then the collector is obtained. When the prepared collectoris used for spodumene ore flotation, the problems that as for an existing floatation collector, the use quantity is large, the cost is high, the low-temperature influence is large, the bubble quantity is large, the selectivity is poor, and the concentrate grade and recovery rate index are not ideal are solved.

The invention discloses a method for rapidly screening iron-rich rice. The method for rapidly screening the iron-rich rice takes rice obtained by mutating or improving on the basis of standard rice as rice to be detected and comprises the steps of respectively carrying out the following steps 1) to 4) on grains of the rice to be detected and grains of the standard rice: 1) carrying out gelatinization on the grains; 2) adding hydrochloric acid into gelatinized grains obtained in the step 1) for neutralizing; 3) adding a hydroxylammonium chloride aqueous solution, an acetic acid-sodium acetate buffer solution, an emulsifier OP aqueous solution and the like, oscillating, uniformly shaking and then standing; 4) adding BPT staining solution into mixture obtained in step 3), uniformly shaking and then standing, and separating clear liquid at the upper layer; 5) comparing colour of reactant of the grains of the rice to be detected with that of reactant of the grains of the standard rice, and if the colour of the reactant of the grains of the rice to be detected is deeper than that of the reactant of the grains of the standard rice, iron content of the grains of the rice to be detected is higher than that of the grains of the standard rice.

The invention relates to a method for preparing copper-doped activated carbon by utilizing a chemical complexing process, and belongs to the technical fields of chemical industry and environmental protection. The method comprises the following steps of functionalizing nitrile groups of a polyacrylonitrile copolymer serving as a raw material by using hydroxylammonium chloride to obtain a product containing a great number of amino groups and hydroxyl groups, chemically complexing the product and a copper ion aqueous solution to obtain copper-doped polyacrylonitrile, and activating copper-doped polyacrylonitrile under different conditions by using potassium hydroxide as an activator to obtain the copper-doped activated copper. The method has the advantages that polyacrylonitrile is used as the raw material, and the nitrile groups of polyacrylonitrile can be effectively and conveniently functionalized; a chemical complexing method is adopted, so that the activated carbon can be efficiently and uniformly doped with copper; in addition, the method has the advantages of simplicity in an operation process, less environmental pollution and the like; compared with an activated carbon material, the copper-doped activated carbon has high specific capacitance, and can be used for a capacitor electrode material.

The invention discloses a preparation method for hydroxylammonium chloride. The method comprises the following steps: in a rectifying column, subjecting a raw material, i.e., ketoxime hydrochloride, to hydrolysis reaction in an aqueous solution so as to generate hydroxylammonium chloride and ketone, discharging the ketone from the top of the rectifying column, and subjecting a hydroxylammonium chloride solution produced from the bottom of the rectifying column to cooling, crystallization and drying so as to obtain a hydroxylammonium chloride product. Compared with the prior art, the preparation method for hydroxylammonium chloride provided by the invention has the following significant advantages: (1) the byproduct ketoxime hydrochloride in the production process of ketoxime type silane is used as a raw material, so cost of treating ketoxime hydrochloride in the production process of ketoxime type silane is reduced, and acid cost of production of hydroxylammonium chloride is saved at the same time; and (2) the use of the byproduct ketoxime hydrochloride in the production process of ketoxime type silane as the raw material is favorable for circulation of process water in a production system and greatly reduces wastewater discharge of production equipment.

The invention discloses a negative electrode material applied to a lithium ion battery and a preparation method of the negative electrode material. The negative electrode material applied to the lithium ion battery is composed of a spinel lithium titanate nanotube and an activated carbon material. The method comprises the following steps: uniformly mixing tetrabutyl titanate and Li2CO3 (or lithium sources such as LiOH), regulating the mixture to be alkaline by using ammonia water and hydroxylamine hydrochloride, and then transferring into a high-pressure kettle and performing hydrothermal reaction at 100-200 DEG C for 24 hours above; cleanly washing the reacted product by respectively using deionized water and absolute ethyl alcohol, and roasting in vacuum at a certain temperature to obtain the spinel lithium titanate nanotube; and heating the activated carbon material at high temperature, and uniformly mixing the activated carbon material with the spinel lithium titanate nanotube to prepare the negative electrode material for the lithium ion battery. Spinel lithium titanate can guarantee the excellent circulating stability of the lithium ion battery, also has the advantages of over-charge resistance, heat stability, high security and large specific capacity, and has wide application prospect when serving as the material for the negative electrode of the lithium ion battery.

The invention relates to a ceramic transforming agent. The ceramic transforming agent is composed of, by weight, 6.6%-8.7% of nitric acid, 9.7%-13.4% of hexafluorozirconic acid, 3.0%-6.0% of zirconium nitrate, 0.5%-1.0% of sodium fluoride, 3.7%-5.9% of ammonium molybdate, 5.0%-7.0% of citric acid, 4.5%-7.0% of tartaric acid, 5.0%-8.0% of hydroxylammonium chloride, 0.1%-0.2% of chromium-free passivation additive Albritect CP40 and 42.8%-61.9% of deionized water. The ceramic transforming agent is a zirconium film treating agent. A layer of nanoscale ceramic transforming film is generated on the surface of a material treated through the ceramic transforming agent, so that the material has excellent coating adherence, corrosion resistance and impact resistance. The metal material treated through the ceramic transforming agent can pass the cross-cut test and the 50 KG stamping test after being coated, the time of a salt spraying test can be 500 hours or above, the ceramic transforming agent does not contain heavy metals such as phosphorus, nickel and manganese, is free from slag and conforms to European Union WEEE&RoHS instruction requirement, the metal materials such as steel, galvanized plates, pure aluminum and aluminum alloys are treated simultaneously, and tank liquid does not need to be replaced. The production cost is low, and the ceramic transforming agent does not need to be heated when used and is energy saving, environmentally friendly and free from pollution.

Belonging to the technical field of chemical waste liquid treatment, the invention relates to a pretreatment method of a hydroxylammonium chloride mother solution recovery process. The pretreatment method includes: adding a hydroxylammonium chloride mother solution, ketone and water into an oximation reaction kettle, then adding ammonia water dropwise to carry out oximation reaction so as to obtain oxime, hydrazone and ammonium salt, carrying out static layering to obtain an organic phase containing oxime and hydrazone, then performing acidification washing on the organic phase with acid liquid, performing static layering, then separating the hydrazine salt, and subjecting the separated product to distillation so as to obtain oxime. The method provided by the invention solves the problems of difficult storage and difficult treatment of hydroxylammonium chloride mother solution, conducts conversion recycling of the hydroxylammonium chloride mother solution, and realizes turning waste into treasure, the process has no discharge of three wastes, and has the characteristics of environmental protection and safety.

The invention discloses a method for determining the mercury content in rapeseed oil. The method for determining the mercury content in the rapeseed oil comprises the following steps that 1, a 10-phenanthroline solution, a hydroxylammonium chloride solution and a sodium acetate buffer solution are prepared; 2, a mercury standard solution is prepared; 3, the double-mercury content is regarded as an x-coordinate and the absorbance is regarded as a y-coordinate to make a mercury standard curve; 4, the rapeseed oil is weighed, concentrated hydrochloric acid, water and glass beads are added, reflux boiling is performed, lower-layer acid extract liquid is filtered by double-layer filter paper after standing and layering, filtrate is fed into a beaker, a conical flask is cleaned, the liquid is poured into a funnel and then is mixed with the filtrate in the beaker after layering, the filter paper is flushed, drying by distillation is performed, and water is added for constant volume so as to obtain a liquid sample; 5, the liquid sample obtained in the step 4 is absorbed in a colorimetric tube, and a mercury marking curve is made as the step 3. The method for determining the mercury content in the rapeseed oil is quick, accurate, simple and convenient to operate, high in sensitivity and smaller in environment pollution, does not use a highly toxic agent, has a minor hazard to human health and can meet the testing demands of ordinary experimenters.

The invention discloses a synthesis method of erlotinib hydrochloride. The synthesis method comprises the following steps: (1) at a first working section: preparing 3-methoxyl-4-hydroxybenzonitrile from vanillin and hydroxylammonium chloride; (2) at a second working section: synthesizing 3,4-dihydroxybenzonitrile; (3) at a third working section: synthesizing 3,4-di(2-methoxyethoxy)phenylacetonitrile; (4) at a fourth section: synthesizing 4,5-di(2-methoxyethoxy)-2-nitrophenylacetonitrile; (5) at a fifth working section: synthesizing 4,5-di(2-methoxyethoxy)-2-aminophenylacetonitrile hydrochloride; and (6) at a sixth working section: synthesizing the erlotinib hydrochloride. The synthesis method of the erlotinib hydrochloride, disclosed by the invention, has the advantages of reasonable design, easiness of obtaining raw materials, relatively low production cost, simplicity and easiness of operation and is suitable for industrial production.

The invention provides a method combining an oxidizing composite reagent and activated carbon to remove arsenic in water. The oxidizing composite reagent is added into the water and stirred, and then the activated carbon is utilized to adsorb the arsenic. The oxidizing composite reagent is formed by compositing potassium ferrate, chlorine dioxide, sodium peroxide, potassium persulfate, potassium monopersulfate, ferrous sulfate, ferric sulfate and hydroxylamine hydrochloride, or is formed by compositing potassium peroxide, sodium peroxide, sodium monopersulfate, iron chloride and hydroxylaminehydrochloride, or is formed by compositing calcium peroxide, sodium hypochlorite, calcium monopersulfate, calcium persulfate, cerium chloride, ferric chloride, cerous sulfate and humus, or is formed by compositing cobalt chloride, ammonium monopersulfate, ammonium persulfate, cerous sulfate, sodium peroxide and hydroxylamine hydrochloride. The method can not only remove the arsenic in drinking water, underground water and surface water rapidly, efficiently, conveniently and safely, but also effectively reduce concentration of the arsenic in sewage containing arsenic and effluent of sewage secondary sedimentation tanks, and simultaneously can have good recovery effect on lakes and inland seawater polluted by the arsenic.

The invention relates to a synthesizing method for a fluorescent copper nano cluster and belongs to the field of biochemistry technologies. According to the synthesizing method, first, a solution containing Cu+2 and a lysozyme solution are mixed evenly, then hydroxylammonium chloride is added into the mixture, the pH value is adjusted to be 10-13, reaction is performed for 6-24 h, and the mole ratio of Cu+2 to lysozyme to hydroxylammonium chloride is 1:1-8:40-400. The synthesizing method has the advantages that the synthesized fluorescent copper nano cluster emits bright fluorescence and is good in water solubility, high in stability, good in biocompatibility and low in toxicity.

The invention relates to a method for detecting divalent manganese ions, which belongs to the technical field of analytical chemistry. The method comprises the following steps: ① first mix thymine solution and copper sulfate solution, then add hydroxylamine hydrochloride solution therein, and adjust the pH to 7 to 12, react for 1 to 2 hours, the molar ratio of thymine, copper sulfate and hydroxylamine hydrochloride is 2 to 5:2:2 to 40, to obtain copper nanocluster detection solution; ② will contain Mn 2+ The liquid to be tested is added to the product obtained in step ① to react for 1 to 10 minutes, and its fluorescence intensity value is measured at an excitation wavelength of 354nm. The beneficial effects of the present invention are: the detection method of the present invention has simple system, stable signal and good selectivity.

The invention discloses amino and amidoxime polyacrylonitrile nanofiber as well as a preparation method and application thereof. The preparation method comprises the following steps of (1) mixing a polyacrylonitrile solution I and a polyamine solution containing two or more ethylidenes, and reacting at 100-120 DEG C for 1.5-5 hours to obtain an amino polyacrylonitrile spinning solution; (2) mixing a polyacrylonitrile solution II and a hydroxylamine hydrochloride solution, adding carbonate, reacting at 65-85 DEG C for 20-40 hours, performing cooling, performing centrifuging, and taking a supernate to obtain an amidoxime polyacrylonitrile spinning solution; and (3) carrying out electrostatic spinning on the amino polyacrylonitrile spinning solution obtained in the step (1) and the amidoxime polyacrylonitrile spinning solution obtained in the step (2) by adopting a double-nozzle electrostatic spinning machine, and performing drying to obtain the amino and amidoxime polyacrylonitrile nanofiber. The amino and amidoxime polyacrylonitrile nanofiber prepared by the preparation method disclosed by the invention can be used for extracting uranium from seawater, and has high uranium adsorption capacity.