78 results about "Ammonium oxalate" patented technology

The invention relates to a glabridin self-assembly inclusion with an ultra-small particle size as well as a preparation method and application thereof, and belongs to the technical field of cosmetics. The composition disclosed by the invention is prepared from the following components in parts by weight: 0.5 to 5 parts of glabridin, 10 to 30 parts of polyhydric alcohol, 0.4 to 6.5 parts of liquorice root carrier component, 1.5 to 3 parts of nonionic emulsifier A, 0.45 to 1.8 parts of nonionic emulsifier B and 53.7 to 87.15 parts of water, the liquorice carrier component comprises at least one of glycyrrhizic acid, ammonium glycyrrhizinate and glycyrrhetinic acid; the nonionic emulsifier A is a nonionic emulsifier of which the hydrophilic-lipophilic balance value HLB is greater than 9; and the nonionic emulsifier B is a nonionic emulsifier with a hydrophilic-lipophilic balance value HLB of 2-4. The glabridin self-assembly inclusion disclosed by the invention is smaller in particle size, good in wrapping performance and good in targeting property; the stability is good, glabridin wrapping does not separate out, and the transdermal absorption rate is higher.

The invention discloses a reactor for treating iron and aluminum metal resources through ammonium oxalate, which is used for extracting iron and aluminum substances after the ammonium oxalate reacts with the iron and aluminum metal resources, and comprises a reaction kettle body, a stirrer, a first pipe orifice for filling high-pressure water vapor, and a second pipe orifice for relieving pressure and filling materials, the third pipe orifice is used for discharging an oxalic acid complex; the fourth pipe orifice is used for discharging ammonia steam; the first pipe orifice, the second pipe orifice and the third pipe orifice are respectively provided with a switch valve; and the fourth pipe orifice is provided with a constant pressure valve. The reaction kettle is used for reacting ammonium oxalate with iron and aluminum metal resources, and device conditions are provided for extracting the iron and aluminum metal resources through ammonium oxalate.

The present invention discloses a rapid hydrogen peroxide test kit and a method of using the same, the rapid hydrogen peroxide test kit comprising a sample diluent and a test strip containing a chromogen for detection and a chromogen for quality control in a dry environment. The sample diluent comprises 100-500 mM ammonium oxalate, 0.3-2.0 mM 8-hydroxyquinoline, 50-500 mM sodium chloride, and 10-100 mM of a first pH adjuster for pH 4.5-7.0.

The invention discloses a method for recovering iron resources from jarosite, which comprises the following steps: S1, reacting ammonium oxalate with jarosite to realize jarosite phase dissolution: mixing jarosite with ammonium oxalate, and heating and reacting in a water reaction system to generate ammonia gas to obtain leached residues and leached liquid; s2, the leachate reacts with ammonia to precipitate and separate iron, and ammonium oxalate is recycled: S2.1, the leachate reacts with the ammonia: ammonia gas is introduced into the leachate or ammonia water is added into the leachate for full reaction, and reaction product slurry containing ferric hydroxide precipitate and ammonium oxalate is obtained; and S2.2, separating ferric hydroxide and ammonium oxalate from the reaction product slurry: filtering and separating to obtain a ferric hydroxide precipitate, and cooling to separate out crystals from ammonium oxalate in the filtrate so as to recover ammonium oxalate. According to the method, ammonium oxalate used for replacing iron in the iron vitriol can be recycled, the raw material cost is low, iron element separation and utilization are achieved, solid waste is remarkably reduced, and enrichment of other valuable elements in the iron vitriol is facilitated.

The invention belongs to the technical field of adsorption materials, and particularly relates to a coupling adsorption material containing zeolite and biomass charcoal as well as a preparation method and application of the coupling adsorption material. The coupling adsorption material is composed of modified zeolite, modified coconut shell biomass charcoal and a silane coupling agent interface bonding layer. After the modified zeolite is modified by three steps of hydrochloric acid, ammonium oxalate and sodium chloride, skeleton exchange sites are unified to be Na < + > type, and the NH < 4 + > interception capability is enhanced; after the modified coconut shell biomass charcoal is oxidized by nitric acid and modified by zirconium oxychloride and phosphoric acid, ammonia nitrogen is removed through multi-mechanism synergy; after two-phase coupling, the ammonia nitrogen removal capability is superior to that of a single component. The silane coupling agent interface bonding layer effectively buffers interface thermal stress generated by mismatching of two-phase thermal expansion coefficients in the high-temperature regeneration process, inhibits microcrack initiation and expansion, guarantees the adsorption capacity stability after multiple regeneration cycles, and prolongs the service life of the material.

The present invention relates to a self-assembled inclusion of glabridin with an ultra-small particle size, a preparation method, and an application thereof, and belongs to the field of cosmetic technology. The composition of the present invention comprises the following components in parts by weight: 0.5-5 parts of glabridin, 10-30 parts of polyol, 0.4-6.5 parts of a licorice carrier component, 1.5-3 parts of a nonionic emulsifier A, 0.45-1.8 parts of a nonionic emulsifier B, and 53.7-87.15 parts of water; the licorice carrier component comprises at least one of glycyrrhizic acid, ammonium glycyrrhizate, and glycyrrhetinic acid; the nonionic emulsifier A is a nonionic emulsifier with a hydrophilic-lipophilic balance value (HLB) greater than 9; the nonionic emulsifier B is a nonionic emulsifier with a hydrophilic-lipophilic balance value (HLB) of 2-4. The self-assembled inclusion of glabridin of the present invention has a smaller particle size, good encapsulation performance, and good targeting; it has good stability, the glabridin encapsulation does not precipitate, and the transdermal absorption rate is higher.

The invention discloses a method for extracting aluminum hydroxide from a material containing activated aluminum oxide. The method comprises the following steps: S1, replacing aluminum oxide in the activated aluminum oxide material; S1.1, leaching aluminum in the activated aluminum oxide material by ammonium oxalate: mixing the activated aluminum oxide material with ammonium oxalate, heating and reacting in a water reaction system to generate ammonia gas, leaching aluminum in the activated aluminum oxide material to obtain a reacted material, and filtering the reacted material to obtain leaching residues and a leaching solution containing (NH4) 3Al (C2O4) 3; the activated aluminum oxide material is bauxite, light-burned bauxite, a material containing a metakaolin phase or aluminum ash; s2, ammonia is added into the leachate for a reaction, and reaction product slurry containing aluminum hydroxide solid precipitates is generated; and S3, filtering and separating the reaction product slurry obtained in the step S2 to obtain an aluminum hydroxide solid precipitate and an ammonium oxalate solution.

This invention provides a method for preparing high-purity ultrafine yttrium oxide, relating to the field of ultrafine oxide powder preparation technology. The method involves removing impurities from a 5N-6N grade yttrium chloride solution to obtain a yttrium chloride solution with low non-rare earth impurities. While emulsifying and shearing an ammonia solution, the low-non-rare earth impurity yttrium chloride solution is introduced into the solution via atomization until the pH of the resulting solution reaches 8-10, yielding a yttrium hydroxide colloidal solution. While emulsifying and shearing the yttrium hydroxide colloidal solution, an oxalic acid solution is introduced into the solution via atomization until the pH of the resulting solution reaches 1.8-2.5. The solution is then filtered to obtain ammonium oxalate yttrium precipitate. Finally, calcination yields high-purity ultrafine yttrium oxide powder. This invention can prepare high-purity ultrafine yttrium oxide with a purity of 99.999-99.9999%, D... 50 The diameter is 0.3–0.5 μm, D 90 With a diameter of less than 1.0 μm, it is suitable for applications such as transparent ceramics and electronic ceramics.

The invention discloses an application of kidney bean seed coat polysaccharide in preparation of a product for improving intestinal flora of old people and / or inhibiting intestinal inflammation, which is characterized in that the kidney bean seed coat polysaccharide is extracted by a citric acid extraction method, a cellulase extraction method and a chelating agent extraction method, and comprises the following steps: soaking and peeling white kidney beans; the method comprises the following steps: drying the seed coats in a hot air oven at 50-80 DEG C for 2-10 hours, grinding the dried seed coats with a high-speed grinder, sieving the ground seed coats to obtain white kidney bean seed coat fine powder, and extracting the kidney bean seed coat polysaccharide from the white kidney bean seed coat fine powder through citric acid, cellulase or ammonium oxalate. Particularly, the invention has potential benefits in the aspects of promoting butyric acid production and improving intestinal health of old people.

The invention provides a copper-based catalyst and a preparation method and application thereof. The preparation method of the copper-based catalyst comprises the following steps: mixing a copper precursor, a zinc precursor, an aluminum precursor and water to prepare a sol solution or suspension; wherein the copper precursor is copper metal salt, the zinc precursor is zinc metal salt, and the aluminum precursor comprises at least one of aluminum metal salt and activated aluminum oxide particles; adding a first reagent into the sol solution or the suspension, and then adding ammonia water to adjust the pH value of the solution to 7 to obtain a neutral solution; wherein the first reagent comprises at least one of citric acid, ammonium citrate, maleic acid, oxalic acid and ammonium oxalate; the ratio of the molar weight of the first reagent to the total molar weight of copper, zinc and aluminum is (1-3): 1; carrying out heating reaction on the neutral solution to obtain wet gel; then drying the wet gel to obtain dry gel; roasting the dry gel to obtain catalyst powder; and carrying out die-casting molding on the catalyst powder, and roasting to obtain the copper-based catalyst.

The present invention provides a method for constructing a fingerprint of a traditional Chinese medicine preparation for treating eczema, comprising the following steps: taking gallic acid, gentiopicroside, geniposide, paeoniflorin, ammonium glycyrrhizate, salvianolic acid B, baicalin, baicalein and wogonin reference substances to prepare a mixed reference substance solution; mixing the traditional Chinese medicine preparation for treating eczema with an organic solvent to prepare a test solution; the organic solvent is selected from one or more of methanol aqueous solution, ethanol aqueous solution and anhydrous ethanol; the mixed reference substance solution and the test solution are respectively subjected to high performance liquid chromatography determination; wherein the conditions adopted by the high performance liquid chromatography include: mobile phase A is selected from one or more of methanol and acetonitrile, and mobile phase B is selected from one or more of phosphoric acid aqueous solution, acetic acid aqueous solution and formic acid aqueous solution; and a gradient elution program is adopted.

The application discloses a method for determining different forms of chromium in soil in a high geological background area and application thereof. The method can sequentially extract the same soil sample and analyze the chromium content in the soil after each step of extraction, so that the distribution of chromium in different forms is obtained, including extracting the adsorbed hexavalent chromium in the soil by using an NH4H2PO4 solution, extracting the iron oxide state chromium therein by using a hot ascorbic acid-ammonium oxalate solution, and extracting the silicate state chromium by using hot concentrated hydrochloric acid, so that the chromium in the chromium iron ore can be fully separated, and accurate results of the chromium form distribution in the high geological background soil are obtained.

The application provides a method for treating acid high-salt tungsten residue wastewater and recycling heavy metals and organic matters, which comprises four steps of precipitation, primary adsorption, secondary adsorption and oxidative deamination. First, ammonium oxalate is added into the tungsten residue wastewater to obtain intermediate effluent I and iron oxalate precipitate; then the intermediate effluent I is passed through a silver-copper exchange resin column to remove silver and copper in the wastewater, and intermediate effluent II is obtained; then the intermediate effluent II is passed through an organic matter exchange resin column to remove organic matters in the wastewater, and intermediate effluent III is obtained; finally, alkali is added into the intermediate effluent III to adjust the pH value to alkaline, an ammonia nitrogen remover is added, and aeration reaction is carried out; after the reaction is completed, PAM coagulant aid is added, and the mixture is statically deposited to obtain sludge and final effluent, and ammonia nitrogen in the wastewater is effectively removed. The method effectively removes heavy metals, ammonia nitrogen, COD and other pollutants in the acid high-salt tungsten residue wastewater, realizes recycling of iron, silver, copper and organic extractant, saves resources and protects the environment.

The invention belongs to the technical field of photoelectric materials, and particularly relates to a multiphase multistage WO3 homojunction photoanode and a preparation method and application thereof. The preparation method of the photo-anode comprises the following steps: preparing a precursor solution by taking sodium tungstate as a raw material, hydrochloric acid as an acid source and ammonium oxalate as a dispersing agent; placing the pretreated conductive glass in a reaction kettle, adding the precursor solution, and carrying out a hydrothermal reaction to obtain conductive glass deposited with yellow tungstic acid; and cleaning, drying and annealing the yellow tungstic acid deposited conductive glass to obtain the yellow tungstic acid deposited conductive glass. The multiphase multistage WO3 homojunction photoanode prepared by the invention can promote the separation of photon-generated carriers, so that the photoelectrocatalysis efficiency is improved.

This invention discloses a method for determining the content of a traditional Chinese medicine compound containing honeysuckle, isatis root, and scutellaria. The method includes the following steps: taking a test solution of the traditional Chinese medicine compound, a first reference solution, and a second reference solution for detection. The chromatographic conditions are as follows: using a chromatographic column packed with octadecyl-bonded silica gel; mobile phase A selected from one or more of acetonitrile, methanol, and tetrahydrofuran; and mobile phase B being an acidic aqueous solution, an alkaline aqueous solution, and / or a buffer salt aqueous solution. The traditional Chinese medicine compound includes honeysuckle, isatis root, scutellaria, indigo leaf, forsythia, platycodon, patchouli, and licorice. The reference standards are baicalin, ammonium glycyrrhizate, honeysuckle saponin B, and dipsacus saponin B. The detection method of this invention is simple, accurate, efficient, stable, precise, reproducible, convenient, and easy to master. It can effectively save energy and reduce analytical costs, while this technology is not disclosed in existing technologies.

This invention discloses a method for preparing and applying a MnO2 / montmorillonite composite material for catalytic formaldehyde degradation, relating to the field of mineral composite catalytic material preparation technology. The method comprises the following steps: blending montmorillonite with a potassium salt to obtain potassium-based montmorillonite; reacting the potassium-based montmorillonite with potassium permanganate and ammonium oxalate to obtain the MnO2 / montmorillonite composite material. The potassium-based montmorillonite prepared in this application acts as a support and provides a solid potassium source for subsequent reactions; potassium permanganate provides a manganese source; and ammonium oxalate controls and reduces manganese defects in the manganese dioxide crystals, resulting in a manganese-defect-rich MnO2 / montmorillonite composite material. The MnO2 / montmorillonite composite material prepared in this application effectively improves the catalytic activity of the catalyst for formaldehyde oxidation at room temperature and reduces the cost of material preparation and application.

The invention discloses a cerium-manganese catalyst for low-temperature propane catalytic combustion as well as a preparation method and application of the cerium-manganese catalyst. According to the method, a continuous method is utilized under stirring, ammonium oxalate is used as a precipitator, manganese sulfate is used as a main catalytic active component, cerium sulfate is used as a trace auxiliary agent, and the invention aims at providing a stable and efficient preparation method of the cerium-manganese catalyst and realizing efficient degradation of propane catalytic combustion under a low-temperature condition. The technical scheme is as follows: (1) preparing a mixed solution A of manganese sulfate and cerous sulfate; (2) preparing an ammonium oxalate aqueous solution B; (3) uniformly stirring the uniform solution at normal temperature for 15 minutes; (4) respectively pumping the solution A and the solution B into a peristaltic pump A and a peristaltic pump B, and mixing and outputting along with a pipeline; (5) centrifuging, washing with deionized water and alcohol, and drying at 60 DEG C to obtain a solid product; and (6) further calcining the solid product in a muffle furnace to obtain a finished product. Relates to the technical fields of petrochemical engineering, thermocatalytic materials and environmental protection.

The application discloses a copper strip surface cleaning agent, which is composed of the following components in percentage by mass: 10-20% of citric acid, 5-10% of ammonium oxalate, 5-10% of disodium ethylenediaminetetraacetate, 1-5% of polyhydroxy alcohol, 0.5-2% of persulfate, 0.5-1.5% of surfactant, and the balance of water. Compared with traditional strong acid cleaning, the copper strip surface cleaning agent is safe and environmentally friendly, has no damage to human body and clothes, has no irritating odor, has no pollution to the environment, and has the removal effect of the oxide on the surface of the copper strip reaching the effect of the strong acid cleaning. In the case that degreasing is not complete, the cleaning effect is even better than that of the strong acid cleaning. The copper strip surface is not damaged, the strip surface is not corroded by over pickling, and the copper strip surface has a certain passivation effect.

This invention relates to the field of carbon dioxide fracturing technology, specifically to a special powder for carbon dioxide activators and its large-scale preparation process. The special powder uses potassium perchlorate, salicylic acid, and ammonium oxalate as main raw materials, compounded with trace functional additives. The formula is scientifically controlled, possessing both high exothermic properties and inherent safety. The preparation process includes: pre-treating the raw materials followed by multi-gradient drying, graded ball milling and sieving, pre-mixing, homogenization and mixing, and secondary drying. The special powder prepared by this invention has a component uniformity deviation of ≤1%, a shelf life of up to 24 months at room temperature with sealing, 100% ignition reliability, and is compatible with various carbon dioxide fracturing devices, exhibiting significant safety, environmental, and economic advantages in mining, municipal engineering, and high-gas mines.

The utility model discloses an ammonium glycyrrhizinate ethanol residue removing device which comprises a drying oven, a condenser, a receiving tank, a vacuum system, a heat supply system and an atomizing and spraying system, the oven, the condenser, the receiving tank and the vacuum system are sequentially communicated through vacuum pipes, and the vacuum system is used for vacuumizing the oven; the heat supply system is used for providing heat energy for the oven; the atomizing and spraying system comprises a water supply pipe and an atomizing and spraying pipe, one end of the water supply pipe is communicated with an external water supply system, the other end of the water supply pipe is communicated with the atomizing and spraying pipe, and an atomizing nozzle is arranged on the atomizing and spraying pipe; an atomizing spray pipe is arranged above each baking tray in the baking oven, and atomizing nozzles arranged on the atomizing spray pipes are used for spraying water mist to the baking trays; the device is reasonable and compact in structure and easy and convenient to operate, the whole process (except for charging) is sealed production, direct online atomization spraying water mixing is adopted, manual water mixing in the production process is avoided, continuous production is achieved, the drying period is shortened, and therefore the production efficiency is effectively improved.

The invention relates to a high-strength refractory material for a VD furnace and a preparation process thereof, and belongs to the technical field of refractory materials. The formula of the refractory material comprises the following components in parts by weight: 65 to 75 parts of sintered mullite aggregate, 10 to 12 parts of flint clay-zirconium oxide composite material, 8 to 10 parts of aluminum oxide micro powder, 4 to 6 parts of calcium aluminate cement, 2 to 3 parts of silicon micro powder, 0.05 to 0.1 part of composite pore-forming agent and 0.12 to 0.25 part of water reducing agent. And a multi-scale gradient pore structure is constructed in the material by using a gradient pore-forming agent compounded from pretreated sisal fibers, nano-coated ammonium oxalate and polymer microspheres. The finally prepared refractory material has high strength, excellent thermal shock resistance and good slag corrosion resistance, and the service life of the material is remarkably prolonged.

The invention relates to a method for removing calcium in a rechargeable lithium battery recycling process. A method of removing calcium in a rechargeable lithium battery recycling process includes: recovering an acidic lithium liquid including calcium from the recycling process; adding an oxalate aqueous solution into the acidic lithium liquid as a first calcium removal process; increasing the pH value of the acidic lithium liquid to prepare an alkaline lithium liquid; and adding an ammonium oxalate aqueous solution to the alkaline lithium liquid as a secondary calcium removal process.

The invention relates to the technical field of fruit and vegetable preservation, and discloses a hydrogel spray preparation method which comprises the following steps: adding berberine hydrochloride into distilled water, and stirring under the water bath condition of 70-90 DEG C until the berberine hydrochloride is completely dissolved to obtain a clear and transparent berberine solution; adding ammonium glycyrrhizinate into the berberine solution, and continuously stirring until the ammonium glycyrrhizinate is completely dissolved to form a homogeneous-phase mixed solution; and standing the mixed solution at room temperature for 8-24 hours. The fresh-keeping hydrogel disclosed by the invention has excellent antioxidant and antibacterial properties, has the capability of tracing the cleanliness degree by fluorescence, can effectively inhibit fungal rot of strawberries and maintain fresh flavor components, and does not influence the sensory quality of the strawberries.

The invention relates to a fingerprint spectrum of traditional Chinese medicine granules for treating nasosinusitis as well as a construction method and a detection method thereof, and belongs to the technical field of traditional Chinese medicine analysis. Comprising the following steps: step 1, preparing a test solution; 2, preparing a mixed reference substance solution; and step 3, performing high performance liquid chromatography detection. The invention further discloses a fingerprint spectrum and a detection method of the traditional Chinese medicine granules for treating nasosinusitis. According to the method disclosed by the invention, the characteristic chromatogram of the traditional Chinese medicine granules for treating nasosinusitis, which is good in separation degree, large in information amount, more in peak identification information and stable in base line, can be obtained, seven common characteristic peaks are determined, and the characteristic peaks of ferulic acid, chlorogenic acid, taxifolin, baicalin, liquiritin, ammonium glycyrrhizinate and quercitrin are successfully identified; the oneness and one-sidedness of quality control are avoided, and the method can be used for quality control and evaluation of the traditional Chinese medicine granules for treating nasosinusitis.

This invention discloses a method for preparing low-fluorine, high-purity tantalum pentoxide, relating to the fields of hydrometallurgical processes for tantalum compounds and the preparation of high-purity oxides. The method involves leaching tantalum-containing raw materials using a fluorinated acid system and extracting them with a phosphorus-containing extractant. The tantalum-loaded organic phase is then back-extracted using a fluorine-capturing-complexation-reversal back-extraction system containing ammonium oxalate, ammonium carbonate, ammonia, disodium ethylenediaminetetraacetate, polyethylene glycol 200, and supported fluorine-capturing microspheres. This yields a low-fluorine tantalum-containing back-extraction solution. The solution is then subjected to precipitation, multi-stage washing, drying, and calcination to obtain low-fluorine, high-purity tantalum pentoxide. The supported fluorine-capturing microspheres utilize macroporous adsorption resin microspheres as a carrier, with zirconium-cerium hydroxide active components immobilized through a polydopamine adhesion layer. This allows for simultaneous capture of fluoride ions during back-extraction, reducing fluorine residue in the product, minimizing impurity introduction, and improving product purity and process stability.

The invention discloses a battery thermal management system based on multifunctional phase change composite material and aerogel coupling. The multifunctional phase-change composite material is prepared from the following components in percentage by mass: 75-90% of low-melting-point paraffin as a phase-change heat storage matrix, 5-10% of expanded graphite as a heat-conducting reinforcing material and a shaping framework, 5-15% of ammonium oxalate as a flame-retardant and thermal runaway early-warning filler, an aerogel heat-insulating sheet for providing a flexible supporting base material and a heat-insulating effect, and the balance of water. The method is suitable for different battery types. The core of the invention lies in that the phase change composite material is integrated with an aerogel heat insulation sheet in a coating or laminating form, and an active-passive integrated heat management function unit is constructed. The unit stabilizes the temperature fluctuation of the battery by using the latent heat storage capacity of the multifunctional phase change composite material, blocks the heat propagation through the aerogel layer, and provides a key signal for the early warning of the thermal runaway of the battery by virtue of the characteristic that ammonium oxalate is decomposed to release ammonia gas at high temperature.

The invention discloses a construction method of a common goldenrop particle extract fingerprint spectrum and a determination method of index component content, the construction method of the fingerprint spectrum comprises the following steps: taking a common goldenrop particle extract test sample solution, and carrying out ultra-high performance liquid chromatography detection, the ultra-high performance liquid chromatography conditions are as follows: the filler of a chromatographic column is C18, the column temperature is 20-30 DEG C, and the column temperature is 20-30 DEG C; the particle size of a chromatographic column is 1.9 microns, and the column temperature is 25 DEG C; and after an ultra-high performance liquid chromatogram is obtained, calculating the contents of the baicalin, the glycyrrhizic acid, the saikoside b1 and the saikoside b2 according to the peak areas of the baicalin, the ammonium glycyrrhizinate, the saikoside b1 and the saikoside b2. The method is easy and convenient to operate, high in efficiency, accurate and good in reproducibility, the quality of the common goldenrop particle extract can be efficiently and accurately controlled, and the stability and uniformity of the quality of a finished product are guaranteed.

The application belongs to a preparation method of a casting sand mold, and aims at the technical problems that liquid acidic curing agent is easy to volatilize, sensitive to environmental humidity, and insufficient in uniform mixing with sand particles and resin in the existing furan resin sand mold preparation process, and that the content of free formaldehyde and odor of traditional furan resin are relatively high, resulting in insufficient curing uniformity and insufficient stability of the forming strength of the sand mold, and provides a dry-state curing agent coated casting sand mold and a preparation method thereof, which comprises the following steps: preparing an environmentally-friendly modified furan resin; compounding calcium hydrogen phosphate, ammonium p-toluenesulfonate and ammonium oxalate into an acidic dry-state powdery curing agent with a free acid content of 0; adding the curing agent into refractory aggregate or raw sand for high-speed dry-state mixing and coating to obtain dry-state curing agent coated aggregate; and then adding the environmentally-friendly modified furan resin, stirring and mixing, molding and naturally hardening to form a casting sand mold. The method can improve the forming stability and compressive strength of the casting sand mold, and reduce the influence of free formaldehyde, free acid and odor.

This invention discloses a composite electrode material and its preparation method, belonging to the field of functional materials technology. The composite electrode material is composed of metal oxides, alkaline phenolic resin, phytic acid, monolayer graphene oxide, coupling agent KH5500, alkaline silica sol, and niobium ammonium oxalate. A continuous carbon network carbonized from phenolic resin serves as the substrate, monolayer graphene oxide as the conductive framework, and niobium pentoxide from the pyrolysis of niobium ammonium oxalate as the interfacial conductive bridging structure. These three components crosslink to form a three-dimensional conductive network. The preparation method includes KH550-modified graphene oxide, construction of the phytic acid composite system, ball milling of the main slurry, low-temperature introduction of phenolic resin for molding, and curing and sintering. This invention possesses high conductivity, high heat resistance, corrosion resistance, and high mechanical strength. The three-dimensional conductive network effectively reduces internal resistance and exhibits excellent cycle stability, making it widely applicable to supercapacitors and lithium-ion batteries. It solves the problems of poor heat resistance, weak interfacial bonding, and easy corrosion of traditional electrode materials.

The application relates to the technical field of antibacterial agents, and provides a preparation and application of superfine cubic sodium zirconium phosphate and a loaded antibacterial agent, which solve the defect of large particle size of zirconium phosphate obtained by an existing preparation method and comprises the following preparation steps: (1) a zirconium-containing compound and a phosphate-containing compound are weighed, a crystal form inducer is added, and then a mixed and uniform composite powder is formed by grinding for more than 30 min; (2) a sodium nitrate and ammonium oxalate-containing aqueous solution is prepared; (3) the prepared composite powder in the first step is weighed according to a proportion, the composite powder is slowly added into the aqueous solution prepared in the step (2) under continuous stirring, and after all the composite powder is added, continuous stirring is carried out and the solution is kept boiling for 2-3 hours; (4) after the reaction is completed, the solution is cooled to room temperature, the pH value is adjusted to weak acidity, and a cationic organic flocculating agent is added, so that cubic sodium zirconium phosphate precipitates are obtained; after dehydration, cleaning and drying, cubic sodium zirconium phosphate powder is obtained.