15 results about "Ammonium oxalate" patented technology

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.

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.

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 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 discloses a kind of shentong zhuyu decoction fingerprint construction method and application, belong to the technical field of drug detection.The application is detected by high performance liquid chromatography to several batches of shentong zhuyu decoction by the selection of mobile phase and the cooperation of chromatographic column, the high performance liquid chromatography of different batches of shentong zhuyu decoction is compared, obtains the common peak containing loganic acid, amygdalin, hydroxyl safflower yellow pigment A, aniseed acid, qianghuo alcohol, isoeucommarin, ammonium glycyrrhizinate, kaempferol characteristic peak, and the fingerprint of shentong zhuyu decoction is constructed according to the common peak.The fingerprint constructed by the application can better detect 12 medicinal materials, shorten the detection time of single sample to 125 min or less, improve efficiency, and improve the quality control level of product.

The application discloses a kind of HPLC fingerprint detection methods of traditional Chinese medicine, the traditional Chinese medicine is made of ten traditional Chinese medicinal materials such as radix codonopsis, atractylodes, poria, licorice, angelica, chuanxiong, white peony root, prepared rehmannia, astragalus, cassia, with the effect of tonifying qi and blood, the fingerprint established in the application includes 11 common characteristic peaks, respectively belong to ten medicinal materials, so it can identify all ten medicinal materials in traditional Chinese medicine, and also identifies 5 components therein, which are glycyrrhizin, ammonium glycyrrhizinate, verbascoside, calycosin-7-glucoside and astragaloside A respectively, so the application can more comprehensively control drug quality, solve the phenomenon of fake and inferior drugs, and ensure the safety and effectiveness of clinical use.

The application discloses a method for extracting cobalt from high-cobalt residue of zinc smelting, and belongs to the technical field of non-ferrous metal smelting. The method comprises the following steps: full immersion of the high-cobalt residue by adding hydrogen peroxide and sulfuric acid; complexation of cobalt ions in the leaching solution with ammonia water; addition of sodium carbonate to form carbonate precipitates of zinc, manganese and other impurities; removal of cobalt, nickel, calcium and magnesium from the cobalt-ammonia complex solution; resolution of the pure cobalt-ammonia complex; and addition of ammonium oxalate to precipitate cobalt. The method realizes efficient extraction of cobalt from high-cobalt residue and preparation of high-purity cobalt oxalate product through the process design of sulfuric acid-hydrogen peroxide synergistic leaching, ammonia water complexation directional separation, step-by-step impurity removal precise purification, acidolysis cobalt precipitation and shaping preparation, and simultaneously completes enrichment and recovery of valuable metals such as zinc and manganese, and the overall process is green and efficient, and controllable in operation, thereby solving the industry pain points of traditional high-cobalt residue storage waste resources and environmental pollution, and having significant technical advantages, economic value and environmental benefits.

This invention discloses a method for removing impurities from a palladium extraction pre-liquid, relating to the field of precious metal hydrometallurgy. The method includes: Step 1, Oxidation Pretreatment: The palladium extraction pre-liquid is heated and concentrated, then water is added, followed by the addition of a mixed acid oxidant, chlorine gas is passed through, and the liquid is boiled to remove the chlorine, then filtered to obtain pretreated solution 1; Step 2, Purification and Impurity Removal 1: Basic lead acetate solution is mixed with pretreated solution 1, and after solid-liquid separation, a purified palladium extraction pre-liquid 2 is obtained; Step 3, Purification and Impurity Removal 2: Thiourea reagent, ammonium oxalate reagent, and liquid alkali are added to palladium extraction pre-liquid 2, mixed, filtered, and the filtrate is used as purified palladium extraction pre-liquid 3; Step 4, High-Efficiency Extraction: Diisopentyl sulfide is washed with a washing solution, and the washed diisopentyl sulfide is used to extract palladium solution 3 to obtain a palladium solution. This method removes selenium and base metal impurities from the palladium extraction pre-liquid, achieving purification and impurity removal, ensuring the extraction efficiency of the solvent extraction process, and reducing reagent consumption and precious metal dispersion loss.

The present application relates to the technical field of hard alloy, in particular to a low-cobalt high-toughness hard alloy material and a preparation method thereof. The material disperses tungsten carbide powder in a mixed solution containing branched polyethyleneimine, sequentially adds seed cobalt solution and growth cobalt solution, adjusts the pH of the system to 7.5-7.9, and then sequentially adds ammonium oxalate solution and oxalic acid solution for deposition and aging. The precursor composite powder is obtained through solid-liquid separation, washing and drying. The hard alloy sintered body is prepared through segmented hydrogen reduction, binder addition, compression, dewaxing and gas pressure sintering. The method is conducive to improving the uniformity of cobalt phase distribution and improving the strength, toughness and wear resistance of low-cobalt hard alloy.

The application discloses a kind of Nb, N co-doped WO3 photoanode catalyst and its preparation method and application, belong to photoelectric semiconductor material preparation and application technical field.The catalyst with WO3 as matrix, simultaneously dope Nb element and N element, wherein Nb atomic doping concentration is 0.5~2.5at%.Its preparation method includes: the tungsten source, ammonium oxalate and niobium source are deposited Nb-doped WO3 film on FTO conductive glass by hydrothermal reaction, after calcination, nitrogenization treatment is carried out again in ammonia atmosphere, obtains Nb, N co-doped WO3 photoanode catalyst.The application is improved by the synergistic co-doping of Nb and N, the bulk carrier transport efficiency of WO3 photoanode and the interface anti-photocorrosion ability effectively, realizes the synergistic promotion of high photocurrent density and long-term operation stability in photoelectric catalytic glycerol oxidation reaction.The preparation method process is simple, low in cost, easy to scale application.

This invention belongs to the field of chemical etching technology, specifically a copper etching solution. Its components are: 0.1-10% hydrogen peroxide as an oxidant, 0.1-5% ammonium oxalate as a main compounding agent, 0.1-5% hydroxyethylidene diphosphonic acid, 0.001-0.5% surfactant, and the balance being deionized water. This invention is highly environmentally friendly: the system does not contain harmful components such as chlorine and fluorine; the decomposition product of hydrogen peroxide is water, achieving clean production; it has high stability, greatly improving the service life of the etching solution; it produces excellent etching quality; and the wastewater treatment process is simple.

The application provides a modification method of a secondary battery positive electrode material, a modified positive electrode material and a secondary battery, and the modification method comprises the following steps: S1, dissolving a chemical modifier in a solvent to obtain a chemical modifier solution; the chemical modifier is one or more of urea, urotropin, thiourea, acylurea, selenourea, thioacetamide, phosphorotriamide, ammonium carbonate, ammonium bicarbonate, ammonium chloride, sodium amide, ammonium acetate, ammonium oxalate, amino acid, protein and biological glue; S2, dispersing a metal oxide positive electrode material in the chemical modifier solution to obtain a dispersion liquid; S3, performing a solvothermal reaction on the dispersion liquid, and after the reaction is completed, the obtained product is washed and dried; and S4, performing a heat treatment on the dried product in an oxygen or air atmosphere, and after the heat treatment is completed, a modified positive electrode material is obtained. The method discards the traditional chemical modifier and treatment method, and has the advantages of simple process flow, low raw material cost and universal application.

This invention discloses a micro-acid oil-controlling and repairing composition specifically designed for men to regulate sebaceous glands and its application, belonging to the field of daily cosmetics technology. The micro-acid oil-controlling and repairing composition comprises active ingredients and excipients, wherein the active ingredients are composed of the following raw materials: sodium DNA, chlorogenic acid, succinic acid, ammonium glycyrrhizate, and hydroxyethylpiperazine ethanesulfonic acid. The micro-acid oil-controlling and repairing composition of this invention does not contain any ingredients restricted for use in cosmetics, is gentle and non-irritating, and through multi-target synergistic action, can significantly inhibit androgen receptor expression, 5α-reductase activity, and the proliferation of Propionibacterium acnes, fundamentally blocking the excessive sebum secretion pathway, simultaneously achieving multiple effects of oil control, acne removal, anti-inflammatory soothing, and barrier repair. It can be widely used in the preparation of various oil-controlling and acne-removing skincare products, especially suitable for the skincare needs of men with oily skin.