120 results about "Aqueous sodium hydroxide" patented technology

The invention belongs to the technical field of sodium hypochlorite production, and particularly relates to a method for producing sodium hypochlorite. A method for producing sodium hypochlorite comprises the following steps: adding a compound additive into a sodium hydroxide aqueous solution, and uniformly stirring to obtain a compound alkali-containing raw material solution; respectively introducing the composite alkali-containing raw material solution and chlorine into the micro-channel reactor through a metering pump, and controlling reaction conditions to generate a reaction solution containing sodium hypochlorite; introducing the reaction liquid into a ceramic membrane separation device, separating and removing unreacted solid impurities and by-product salts, and collecting permeate; unreacted sodium hydroxide is recycled and reused; and detecting the permeate liquid to be qualified to obtain a sodium hypochlorite finished product. According to the invention, four key links of compound additive addition, microchannel reaction, ceramic membrane separation and resin recovery are organically linked to form a systematic solution. Aiming at the core pain points of insufficient reaction, more byproducts, raw material waste, equipment corrosion and the like in the traditional process, the product purity is improved through the synergistic effect of all links.

The invention discloses a preparation method of an arfamarana key intermediate, which comprises the following steps: carrying out nucleophilic addition reaction on a compound I and 1-[3-chloro-5-(trifluoromethyl) phenyl]-2, 2, 2-trifluoroethanone under the action of an organic solvent A and alkali to obtain a compound II; dissolving the compound II in an organic solvent B, adding concentrated sulfuric acid, carrying out intramolecular dehydration and cyanogen hydrolysis, and after the reaction is finished, cooling to room temperature for crystal growing to obtain a compound III; dissolving the compound III in an organic solvent C, carrying out intramolecular cyclization and ester hydrolysis reaction on the compound III and hydroxylamine hydrochloride under the action of a certain amount of sodium hydroxide aqueous solution, and after the reaction is finished, collecting a water phase and adjusting the pH value of the water phase, so as to obtain the key intermediate of arfampanaga. The reaction in each step has a high conversion rate, the purity of the prepared arfamarin intermediate is high, and powerful support and guarantee are provided for preparation of high-purity arfamarin.

The utility model relates to the technical field of waste oil regeneration, and discloses a waste white oil alkali washing device which comprises a tank body, a heating assembly is installed on the periphery of the tank body, a sleeve, a servo motor and a feeding pipe are sequentially and fixedly connected to the top of the tank body from left to right, and a liquid discharging pipe is fixedly connected to the bottom of the tank body. A stirring assembly is installed in the tank body, a top ring is slidably connected to the middle of a sleeve, a filtering barrel is fixedly connected to the bottom of the top ring, a connecting pipe is fixedly connected to the top of the top ring, an elastic assembly is installed in the middle of the top ring, a clamping block is slidably connected to the middle of the top ring, and a clamping groove is formed in the middle of the sleeve; and the middle part of the sleeve is slidably connected with a push rod. According to the utility model, firstly, waste white oil is input through the connecting pipe, and larger impurities can be filtered under the action of the filtering barrel at the bottom of the connecting pipe, so that the mixing efficiency of the waste white oil and a sodium hydroxide aqueous solution is ensured, and the impurities are prevented from blocking the pipeline.

The invention provides polyimide and a preparation method thereof. The preparation method comprises the following steps: adding a sodium hydroxide aqueous solution into a monomer solution containing a dianhydride monomer and an aprotic solvent, mixing, adding diisocyanate, carrying out a polymerization reaction to obtain a reaction product system, and precipitating from the reaction product system to obtain polyimide, wherein the feeding time of the diisocyanate is 4 to 5 hours; in the monomer solution, the molar concentration of the dianhydride monomer is 0.5-0.6 mol / L; the obtained polyimide has the advantages of high specific concentration viscosity, high molecular weight and excellent high temperature resistance.

The invention discloses a 2-hydroxy-benzonitril solution and a production method thereof, the production method comprises the step of preparing a wet 2-hydroxy-benzonitril product through reaction of salicylamide and phosgene, and is characterized in that the wet 2-hydroxy-benzonitril product is directly added into a sodium hydroxide aqueous solution to obtain the 2-hydroxy-benzonitril solution. The sodium salt solution can be directly produced without taking out the 2-hydroxy-benzonitril, so that exposure of the 2-hydroxy-benzonitril is avoided, personal injury is reduced, investment of drying equipment is reduced, and direct feeding of downstream products is facilitated.

The utility model relates to a photosensitive ink removing device for etching a miniature loudspeaker end cover, and belongs to the technical field of loudspeaker end cover processing, the photosensitive ink removing device comprises a basket, a soaking mechanism and a flushing mechanism arranged beside the soaking mechanism, the soaking mechanism comprises a soaking pool, a strip-shaped rack, a waterproof gear motor, a guide rail, a sliding rail, a base and a mounting seat, the strip-shaped rack, the guide rail and the sliding rail are all installed at the bottom of the soaking pool in the length direction of the soaking pool, the base is connected to the sliding rail in a sliding mode, and the waterproof gear motor is installed on the base. In the soaking process, the whole basket can perform wave-shaped motion, so that the aluminum plate is driven to swing left and right in a solution, on one hand, the aluminum plate swings left and right to stir the solution to generate turbulent flow, so that the solubility of a sodium hydroxide aqueous solution is uniformly distributed, and on the other hand, falling of ink floating skin can be accelerated; and the ink removal efficiency is greatly improved, and the labor intensity of workers can be relieved.

The invention relates to the technical field of preparation of inorganic chemical materials, and discloses a controlled synthesis process of a high-temperature-resistant sodium antimonate crystal structure, which comprises the following steps: dispersing antimony trioxide in a sodium hydroxide aqueous solution with the initial concentration of 6.5-8.0 mol / L, and adding sodium metaaluminate as a lattice directing agent to prepare a precursor base solution; heating the base solution, maintaining turbulent stirring, executing double-flow-path synchronous compensation, dropwise adding a hydrogen peroxide aqueous solution and synchronously adding sodium hydroxide; the method comprises the following steps: dynamically setting a coupling relationship among an alkali supplementing rate, an oxidation rate and a reaction stoichiometric ratio, counteracting a dilution effect of water generated by reaction and solvent water in real time, and maintaining the concentration of free sodium hydroxide in a mother solution in the whole reaction process at 6.0 mol / L or above until a reaction endpoint is reached. The path of lattice interstitial water or surface hydroxyl is blocked, anhydrous sodium antimonate without crystal water removal steps in the whole temperature range is prepared, and the foaming problem in high-temperature processing is solved.

This invention discloses an acid and alkali resistant polyamide membrane and its preparation method. The method is as follows: S1: Immerse the ultrafiltration base membrane in an aqueous sodium hydroxide solution for soaking and then set aside; S2: Treat the base membrane with a mixed aqueous solution of polyamine and aziridine crosslinking agent; S3: Wet the base membrane in an organic phase solution of polyacrylamide monomer to obtain a polyamide composite membrane; S4: Immerse the prepared polyamide composite membrane in an alcoholic solution of hydroxymethyl crosslinking agent, then dry it in a forced-air drying oven, and after washing with water, obtain the acid and alkali resistant polyamide membrane. This application uses two crosslinking agents, aziridine and hydroxymethyl, which can undergo specific crosslinking reactions with the carboxyl groups inside the polyamide membrane, to directly perform dual crosslinking modification on the membrane interior and surface, without introducing other polymer materials to avoid excessive increase in membrane permeation resistance. The polyamide membrane prepared by this method has both good acid and alkali resistance and water permeability.

The invention provides an epoxy resin curing agent containing MOFs as well as a preparation method and application thereof, and the preparation method comprises the following steps: S1, dissolving an organic ligand in an N, N-dimethylformamide (DMF) solution, and dropwise adding a sodium hydroxide aqueous solution into the organic ligand solution to obtain disodium salt; s2, dissolving the disodium salt precipitate obtained in the step (1) in distilled water; slowly dropwise adding 10mL of deionized water into manganese chloride, stirring and dissolving, adding a disodium salt aqueous solution, mixing, and carrying out vacuum drying to obtain a metal organic framework material Mn-NPA; s3, heating the Mn-NPA, and carrying out vacuum drying and activation on the Mn-NPA; s4, Mn-NPA and an imidazole compound are mixed for a load reaction; and S5, filtering and drying the reacted mixture to obtain the epoxy resin curing agent containing MOFs. According to the epoxy resin curing agent containing MOFs, an epoxy resin coating can be prepared into a single component, and the epoxy resin curing agent can be used once a cover is opened and is convenient to use and easy to construct.

The invention relates to the technical field of solid waste material recycling, in particular to a solid waste-based geopolymer and a preparation method thereof. The solid waste-based geopolymer comprises the following components in parts by mass: 400-500 parts of fly ash; 400 to 500 parts of mineral powder; 40-60 parts of a sodium hydroxide aqueous solution; 200 to 400 parts of water; the solid content of the nano waterborne epoxy emulsion is 30-62%, the particle size of the nano waterborne epoxy emulsion is 100-900 nm, and the nano waterborne epoxy emulsion accounts for 3-9% of the total mass. According to the invention, the compactness of a matrix is enhanced, shrinkage cracking caused by water evaporation is reduced, the toughness and anti-permeability of the material are improved, the compactness of an interface is enhanced, the saltpetering condition of the matrix is inhibited, and wide application in the field of building materials is facilitated.

The application discloses a chrysochlamys zollingeri extract functionalized viscose fiber and a preparation method and application thereof, and belongs to the technical field of functional fiber material preparation.The chrysochlamys zollingeri extract functionalized viscose fiber is formed by wet spinning process of a viscose original solution containing microcapsules, and the viscose original solution containing microcapsules is prepared by mixing a viscose original solution and chrysochlamys zollingeri extract / porous starch composite microcapsules, wherein the viscose original solution is prepared by impregnating cellulose pulp with a sodium hydroxide aqueous solution, carbon disulfide yellowing, and then dissolving and aging in a sodium hydroxide aqueous solution.The chrysochlamys zollingeri extract functionalized viscose fiber is prepared by microcapsule embedding combined with a mild spinning process, so that active ingredients of the chrysochlamys zollingeri extract are maximally retained, long-acting, stable and slow release and anti-inflammatory and soothing effects are achieved, the chrysochlamys zollingeri extract functionalized viscose fiber can be further processed into a functional fabric through a water jet process, and is suitable for high-end sanitary material fields such as infant paper diapers.

The invention belongs to the field of organic synthesis, and particularly discloses an acoustic resonance synthesis method of 1, 4-diformyl-2, 3, 5, 6-tetrahydroxypiperazine, which comprises the following steps: under acoustic resonance and room temperature conditions, formamide, glyoxal and alkali liquor are subjected to a reaction for 5-10 min to synthesize 1, 4-diformyl-2, 3, 5, 6-tetrahydroxypiperazine, and the 1, 4-diformyl-2, 3, 5, 6-tetrahydroxypiperazine is subjected to a reaction for 5-10 min to obtain the 1, 4-diformyl-2, 3, 5, 6-tetrahydroxypiperazine. The acceleration of acoustic resonance is 196-980 m / s < 2 >, and the alkali liquor is selected from a sodium hydroxide aqueous solution, a potassium hydroxide aqueous solution or triethylamine. According to the present invention, the alkali-catalyzed aldehyde amine condensation reaction is achieved by using acoustic resonance reinforcement, the 1, 4-diformyl-2, 3, 5, 6-tetrahydroxypiperazine is rapidly and efficiently synthesized, the reaction time is substantially shortened, the product yield is improved, and the method has broad industrial application prospects.

The application discloses a harmless combined treatment method for industrial aluminum ash, phosphogypsum and carbon dioxide, and comprises the following steps: S1, putting secondary aluminum ash into a sodium hydroxide aqueous solution, collecting tail gas and filtering; S2, slowly passing CO2 gas into the filtrate of S1, and performing three times of washing and filtering to obtain filter residue aluminum hydroxide; S3, adding phosphogypsum into the mixed solution of the second and third washing filtrates of S2, stirring and reacting, washing and filtering, and then evaporating and crystallizing the filtrate to obtain sodium sulfate; S4, calcining the filter residue of S3, and passing the generated gas into S2; S5, mixing and reacting the calcined solid with the tail gas collected in S1, collecting the reacted tail gas again and passing it into S4; and S6, reacting the solid in S5 with the first washing filtrate of S2, returning the filtrate to S1 after washing and filtering, and repeating S4 for the filter residue.

This invention belongs to the field of microwave catalysis, specifically relating to a method for preparing and applying a copper-manganese composite ferrite microwave catalyst capable of forming oxygen vacancies. The catalyst preparation method includes the following steps: (1) adding ferric chloride, copper chloride, and manganese chloride to deionized water to obtain a precursor aqueous solution, then adding urea and stirring; (2) adding sodium hydroxide aqueous solution dropwise to the precursor aqueous solution obtained in step (1) while stirring, adjusting the pH to 11-12 to obtain a suspension, and continuing stirring; (3) filtering, washing, and drying the suspension obtained in step (2) to obtain a solid substance; (4) grinding and sintering the solid substance obtained in step (3) to obtain the copper-manganese composite ferrite microwave catalyst. The preparation method of this invention has a simple process flow, short processing time, high safety, and better microwave catalytic activity and stability than manganese ferrite and copper ferrite alone.

The invention discloses a fully continuous flow preparation method of 4, 5-diiodine-1H-imidazole, and belongs to the technical field of synthesis and preparation. The method comprises the following steps: S1, simultaneously conveying an imidazole-containing sodium hydroxide aqueous solution, an iodine-containing elementary substance and a potassium iodide aqueous solution into a micro-mixer and a continuous flow coil reactor, and carrying out a continuous synthesis reaction to obtain a 4, 5-diiodine-1H-imidazole reaction solution; and S2, dropwise adding an acetic acid solution into the 4, 5-diiodine-1H-imidazole reaction solution to neutralize, separating out a solid product, washing with ice water, filtering and drying to obtain a 4, 5-diiodine-1H-imidazole solid. The fully continuous flow reaction technology system provided by the invention has excellent mass transfer and heat transfer performance, greatly enhances mixing among material molecules, greatly shortens the reaction time, and improves the reaction efficiency. The reaction time is shortened to more than ten seconds from more than ten hours of the traditional intermittent kettle reaction; meanwhile, the side reaction is inhibited, and the product quality of the 4, 5-diiodine-1H-imidazole (I) is improved.

The invention relates to a method for one-step synthesis of high-quality stannous oxide through intermittent ultrasonic reinforcement, and belongs to the technical field of semiconductor material preparation. The preparation method comprises the following steps: dropwise adding a sodium hydroxide aqueous solution into a stannous chloride aqueous solution at room temperature under a stirring condition until the pH value is 12.5-13.5 to form a mixed solution system; applying intermittent ultrasonic waves to the mixed solution system for intermittent ultrasonic treatment to induce direct nucleation and growth of stannous oxide and synchronous removal of chlorine impurities, carrying out solid-liquid separation, and drying the solid to obtain the low-chlorine fine-particle-size stannous oxide. According to the method, through the work-stop periodic effect of intermittent ultrasound, dynamic conditions are provided for diffusion and desorption of chloride ions while nucleation and growth regulation are promoted through cavitation, cooperative regulation of particle size refinement and deep dechlorination of stannous oxide is achieved, a high-temperature step or repeated washing is not needed, the process is simple and efficient, the conditions are mild, and the method is suitable for industrial production. And controllable preparation of the high-performance stannous oxide material can be realized.

To provide a method for efficiently regenerating wastewater solutions of sodium hydroxide. [Solution] A method for regenerating a waste sodium hydroxide aqueous solution containing aluminum, comprising the steps of: mixing and reacting an aqueous slurry containing a calcium compound with the waste sodium hydroxide aqueous solution to form a reaction solution containing a supernatant liquid and a solid reaction residue; and subjecting the reaction solution to a solid-liquid separation treatment to remove the reaction residue, thereby recovering the supernatant liquid as a regenerated sodium hydroxide aqueous solution.

To provide a laminate in which aluminum foil and a plastic base material are laminated and from which aluminum can be separated and recovered with a basic aqueous solution in a high yield, and to provide a method for producing recycled aluminum.SOLUTION: A laminate comprising at least one plastic substrate, a release layer, and a separation layer in this order, wherein the separation layer comprises a first polymer layer, an aluminum foil, and a second polymer layer in this order, the release layer is a peelable polymer layer composed of a material having an acid number higher than an acid number of a material constituting the inorganic material-deposited layer and / or the first polymer layer and higher than an acid number of a material constituting the second polymer layer, and when the laminate is cut into 1cm * 1cm and statically immersed in a 1% by mass sodium hydroxide aqueous solution at 60 °C for 6 hours, the aluminum foil-containing laminate including the separation layer can be separated and recovered by peeling off the release layer from the plastic substrate.SELECTED DRAWING: None

The invention discloses a preparation method and application of an acid-base bifunctional magnesium-aluminum bimetallic oxide catalyst, and relates to the technical field of biomass catalytic conversion and heterogeneous catalytic materials.The preparation method comprises the steps that firstly, magnesium nitrate hexahydrate and aluminum nitrate nonahydrate are dissolved into a metal salt mixed solution; dropwise adding a sodium hydroxide aqueous solution into the metal salt mixed solution to obtain a turbid solution; heating and crystallizing in a water bath, transferring into a reaction kettle, and putting into a drying oven for hydrothermal crystallization. The method comprises the following steps: synthesizing a hydrotalcite-like precursor through a coprecipitation-hydrothermal coupling method, and carrying out high-temperature roasting to obtain the acid-base bifunctional composite metal oxide. The acid-base bifunctional composite metal oxide has the beneficial effects that the acid-base bifunctional composite metal oxide has a layered structure and a high specific surface area and is suitable for a biomass pyrolysis-catalytic reforming process, an alkaline site of the acid-base bifunctional composite metal oxide promotes a deoxidation reaction, an acidic site of the acid-base bifunctional composite metal oxide promotes an aromatization reaction, and the acid-base bifunctional composite metal oxide can effectively regulate and control the composition of biomass pyrolysis volatile components; the content of oxygen-containing compounds is obviously reduced, and the selectivity of monocyclic aromatic hydrocarbon is improved.

The invention provides a selenium-doped layered mixed-phase molybdenum disulfide-based piezoelectric catalyst, which is prepared by the following steps: adding selenium powder and sodium borohydride into an ethanol water solution to obtain a selenium-containing solution; adding a molybdenum source and a sulfur source into the selenium-containing solution, and stirring to obtain a reddish brown precursor solution; performing hydrothermal crystallization on the reddish brown precursor solution to obtain a black solid; grinding the black solid into powder, adding into a sodium hydroxide aqueous solution, stirring in a water bath, filtering and collecting the solid; and grinding the collected solid again to obtain the selenium-doped layered mixed-phase molybdenum disulfide-based piezoelectric catalyst. The molybdenum disulfide-based piezoelectric catalyst prepared by the invention is used for performing piezoelectric catalytic degradation on organic wastewater containing antibiotics and / or organic dyes in a microwave environment. According to the molybdenum disulfide-based piezoelectric catalyst, the out-of-plane piezoelectric response is improved, the carrier separation efficiency is improved, the problems that a traditional molybdenum disulfide piezoelectric material is low in active site density and low in carrier separation efficiency are solved, and the molybdenum disulfide-based piezoelectric catalyst can be recycled.

The application discloses an LDH-based vaccine adjuvant and a preparation method and application thereof, and belongs to the technical field of aluminum adjuvant preparation of vaccines, and the preparation method comprises the following steps: mixing at least one of soluble magnesium salt, soluble zinc salt, soluble manganese salt and soluble calcium salt with soluble aluminum salt, and then performing a co-precipitation reaction with a sodium hydroxide aqueous solution in a colloid mill device, and performing crystallization to obtain LDH nanosheets; dispersing the LDH nanosheets in a PBS solution, adding a hepatitis B surface antigen molecule drug, uniformly mixing, and then performing centrifugation to obtain the LDH-based vaccine adjuvant. The LDH-based vaccine adjuvant can significantly promote the maturation of DC cells and the activation of T cells, and the total IgG level reflects the overall humoral immune response intensity of the body to vaccines or pathogens; the LDH-based vaccine adjuvant forms a "storage library" at an injection site to store antigens and slowly release the antigens, and the purpose of long-time continuous stimulation of the immune system in the body is achieved.

The present disclosure relates to a method of making CuFe2O4 nanoparticles from metal cans. The method includes cutting the metal can into small pieces, adding concentrated nitric acid to the pieces to obtain an iron nitrate solution, and adding an aqueous sodium hydroxide solution to the iron nitrate solution to provide a precipitate. The precipitate can be centrifuged and dissolved with HNO3 to obtain an iron nitrate solution. The iron nitrate solution can be mixed with copper nitrates to obtain a mixture. Aqueous NaOH solution can be added to the mixture to obtain an aqueous precipitate including the CuFe2O4 nanoparticles.

The invention belongs to the technical field of electrochemical detection, and particularly relates to a graphene-copper oxide composite material electrochemical detection electrode and a preparation method thereof. The preparation method comprises the following steps: adding a sodium hydroxide aqueous solution into a graphene-dispersed copper sulfate aqueous solution, fully oscillating and uniformly mixing, putting into a flask, and heating by using far infrared rays to promote reaction; performing vibration dispersion, suction filtration and cleaning on the product to obtain a graphene-copper oxide composite material membrane on a filter membrane, drying the graphene-copper oxide composite material membrane, stripping, cutting the graphene-copper oxide composite material membrane into strips with the length of 2-10mm and the width of 0.5-2mm, placing the strips at one end of a transparent plastic batten, dropwise adding a solvent for pre-fixation, placing a copper wire on the middle line of the long edge of the batten, enabling one end of the copper wire to be in contact with an electrode membrane, and dropwise adding the solvent for pre-fixation; and then, the plastic battens with the same size are covered on and aligned with the plastic battens, and the electrode is prepared through hot-pressing packaging. The electrode is simple and convenient to manufacture, low in price and convenient to use, and can be used for electrochemical detection of substances such as saccharides, alcohols, phenols, amino acids, aromatic amines, sulfydryl and nitro-aromatic hydrocarbons.

The invention relates to a preparation method of fatty acid amide propyl betaine, and belongs to the technical field of surfactants. The preparation method provided by the invention comprises the following steps: S1, adding N, N-dimethyl propane diamine into an initial raw material, and carrying out heating reflux reaction to obtain fatty acid amide propyl dimethylamine; the initial raw materials comprise at least one of fatty acid and derivatives thereof; s2, adding water, monochloroacetic acid and a sodium hydroxide aqueous solution into fatty acid amide propyl dimethylamine, heating and carrying out quaternization reaction to obtain a crude product; s3, hydrolyzing the crude product under the conditions that the temperature is 70 to 100 DEG C and the pressure is 0.1 to 0.5 MPa, so as to obtain the fatty acid amide propyl betaine. According to the preparation method provided by the invention, other impurities do not need to be introduced for post-treatment, the prepared fatty acid amide propyl betaine can effectively hydrolyze residual monochloroacetic acid and dichloroacetic acid, by-products are reduced, the product safety is remarkably improved, and the fatty acid amide propyl betaine has a relatively high application value.

This invention discloses an edible aerogel derived from *Flammulina velutipes*, its preparation method, and its applications. The preparation method includes the following steps: dispersing dried *Flammulina velutipes* powder in an aqueous sodium hydroxide solution, reacting, separating, and washing to obtain a precipitate; dispersing the precipitate in an aqueous sodium hypochlorite solution for bleaching, separating, washing, and freeze-drying to obtain an extract; dissolving polyphenols in an aqueous NaOH solution to obtain a NaOH / polyphenol dissolution system; dispersing the extract in the NaOH / polyphenol dissolution system, and shaking to promote CGC swelling; cycling the obtained suspension through freeze-thaw cycles 2-4 times; centrifuging the suspension, and partially dialyzing the solution to remove NaOH to obtain a hydrogel-like CGC-polyphenol complex; freeze-drying and grinding the hydrogel-like CGC-polyphenol complex to obtain an edible aerogel derived from *Flammulina velutipes*. This invention provides the application of the aforementioned edible aerogel derived from *Flammulina velutipes* in the preparation of weight-loss drugs or dietary supplements.

A process for preparing a compound of formula (NaOH)x[Fe(OH)2]yFeS, may include: (a) mixing iron and sodium sulfide in equimolar amounts, in an NaOH aqueous solution; (b) heating the obtained mixture up to a temperature in a range of from 110 to 210° C. for a duration in a range of from 1 hour to 1 week; and (c) recovering the active material by filtering and drying in a neutral atmosphere.

The application provides a preparation method of a modified cellulose buffer layer-based forward osmosis membrane and a product thereof, and comprises the following steps: 1) dispersing cellulose fibers into an aqueous sodium hydroxide solution to prepare an alkaline dispersion solution of the cellulose fibers; 2) adding 2-chloroacetamide into the alkaline dispersion solution of the cellulose fibers, and continuously heating and stirring to prepare modified cellulose fibers; 3) dissolving the modified cellulose fibers in a solvent to prepare a cellulose solution, and then coating the cellulose solution on the surface of a non-woven fabric; and 4) growing an ultrathin polyamide layer on the surface of the cellulose-non-woven fabric in situ by using m-phenylenediamine and 1,3,5-benzene tris-methyl chloride, so as to prepare the modified cellulose buffer layer-based forward osmosis membrane. The modified cellulose buffer layer-based forward osmosis membrane has excellent water flux and salt retention performance, has good stability of separation performance, has a simple preparation process, can reduce the amount of polyamide, is low in cost, and is suitable for large-scale production.

A method for producing ammonium nitrate includes a nitrogen dioxide recovery step of bringing nitrogen dioxide in a cement exhaust gas into contact with water to obtain an NOx-containing solution, a reduction reaction step of producing ammonia by bringing a reducing catalyst into contact with the NOx-containing solution, an ammonia recovery step of vaporizing the ammonia with a waste heat gas, a solid-liquid separation step of separating a residue after the ammonia recovery into iron hydroxide and an unused residue of NOx, a neutralization step of bringing the separated nitrate / nitrite nitrogen-containing solution and the NOx-containing solution into contact with the ammonia vaporized and recovered to prepare ammonium nitrate, and a catalyst production step in which magnetite used in the reduction reaction step is obtained by reacting iron sulfate with a sodium hydroxide aqueous solution and separating the mixture into solid and liquid, the sodium sulfate aqueous solution in the solid-liquid separation is separated into sodium hydroxide and sulfuric acid by electrodialysis, and the sodium hydroxide is used in a circulatory manner for preparing the magnetite, where the nitrogen dioxide in the cement exhaust gas is treated simply and efficiently while reducing environmental burden.

A raspberry-like basic copper chloride nanomaterial with dual enzymatic activity, its preparation method, and its application are disclosed. The steps are as follows: Dimethyl sulfoxide is added to an aqueous sodium hydroxide solution containing N-fluorenemethoxycarbonyl-L-arginine (Fmoc-L-Arg), and the solution is sonicated until clear to obtain mixed solution A. An aqueous solution of copper chloride dihydrate (CuCl2·2H2O) is prepared for later use. The CuCl2·2H2O aqueous solution is added to mixed solution A to obtain mixed solution B, and the reaction is allowed to stand. After the reaction is complete, the precipitate is collected by centrifugation and washed with water. This invention employs a biomimetic mineralization method, using Fmoc-L-Arg molecules as templates to guide and control the formation of uniformly sized (130 nm) Cu2(OH)3Cl nanomaterials. These nanomaterials simultaneously possess dual enzymatic activities similar to peroxidase and glutathione oxidase, exhibiting good biocompatibility and enabling specific killing of tumor cells.

This invention relates to a method for preparing a hydrophobic island-type fiber nonwoven fabric for efficient oil absorption. The invention pretreats the island-type fiber nonwoven fabric with an aqueous sodium hydroxide solution, opening the fibers and removing impurities from the fabric surface. The polypyrrole particles loaded on the surface of the island-type fiber nonwoven fabric endow it with excellent photothermal conversion properties, enabling in-situ heating of high-viscosity oils and improving its adsorption performance. The polydimethylsiloxane coating gives the island-type fiber nonwoven fabric good hydrophobic and oleophilic properties, allowing it to selectively adsorb oils in complex environments and effectively adsorb different types of oils. Under light irradiation, the island-type fiber nonwoven fabric can in-situ heat crude oil, reducing its viscosity and achieving rapid adsorption. The selected polypyrrole preparation process is mature, and polydimethylsiloxane has good hydrophobic properties and is fluorine-free. This invention provides an effective and environmentally friendly solution to the problem of oil adsorption and recovery.