81results about How to "Mild process conditions" patented technology

The application discloses a preparation method of a sodium ion battery hard carbon negative electrode material based on step-by-step synergistic regulation, and comprises the following steps: S1, biomass pretreatment; S2, low-temperature pre-carbonization to obtain biomass pre-carbonized carbon; S3, physical activation: the pre-carbonized carbon is placed in an activation atmosphere to perform medium-temperature activation, and biomass activated carbon is obtained; S4, high-temperature carbonization: the biomass activated carbon is placed in an inert atmosphere to perform high-temperature carbonization, and a hard carbon intermediate is obtained; S5, chemical vapor deposition coating: the hard carbon intermediate is placed in a mixed atmosphere of a coating carbon source and an inert gas to perform chemical vapor deposition coating, and a surface-coated biomass hard carbon negative electrode material is obtained. The application can realize a higher closed pore volume at a milder temperature, and the synergistic regulation pore forming mode of activating and forming pores first and then high-temperature closing pores also avoids the insufficient closed pores caused by single high-temperature treatment.

The invention relates to a silicon-based negative electrode material based on metal oxide coating and preparation and application thereof, and a preparation method of the material comprises the following steps: S1, putting a silicon-based material into a solvent for ultrasonic dispersion to obtain a uniform suspension; s2, adding a metal oxide precursor into the suspension obtained in S1, and carrying out hydrolysis or condensation reaction to generate a continuous metal oxide coating layer on the surface of the silicon-based material in situ; and S3, after the reaction is finished, centrifugally separating, washing and drying the obtained product to obtain the silicon-based negative electrode material, namely a target product. Compared with the prior art, the method provided by the invention is simple in process, low in cost and good in repeatability, and the obtained coated silicon material has excellent structural stability and electrochemical performance and has a wide application prospect in high-energy-density lithium ion batteries and all-solid-state batteries.

The present invention discloses a controlled-release type polymeric ferric sulfate water treatment agent and its preparation method, belonging to the technical field of water treatment functional materials. The water treatment agent consists of polymeric ferric sulfate, an iron ion color indicator, a gel matrix, a cross-linking calcium agent, amino diatomaceous earth, a pore-forming agent and an inert filler. The preparation method includes: first preparing a network gel, then preparing soft materials, and finally obtaining the product through pill-making and drying. The present invention realizes the slow release and controllability of polymeric ferric sulfate, and the color indicator can directly reflect the consumption state of polymeric ferric sulfate, facilitating storage, transportation, dosing and recovery.

This invention discloses a method for preparing an aromatic amine-free organic pigment yellow, comprising the following steps: S1, preparing a diazo solution by sequentially adding water, inorganic acid, and diazo components to a diazo tank, stirring and slurrying, then cooling the mixture in the diazo tank to below 0°C and adding nitrite; S2, preparing a coupling solution by sequentially adding water, inorganic alkali, and coupling components to a dissolving tank, stirring and dissolving until clear; S3, coupling reaction by adding water, acetic acid, and surfactant to a coupling tank, stirring and mixing evenly, then slowly adding the diazo solution and coupling solution simultaneously to the coupling tank for a coupling reaction; S4, pigmentation by heating to above 60°C and maintaining the temperature, adjusting the pH of the solution to alkaline; S5, filtering, washing, and drying to obtain an aromatic amine-free organic pigment yellow. This invention is applicable to the synthesis of most mono- and diazo organic pigment yellows, reducing aromatic amine residues during the synthesis process and ensuring that the organic pigment yellow product is free of aromatic amine residues.

The invention discloses a cobalt molybdenum oxide catalyst, a preparation method thereof and a method for preparing propylene by catalyzing oxidative dehydrogenation of propane. The invention aims to provide a preparation method of a cobalt-molybdenum oxide catalyst, and the cobalt-molybdenum oxide catalyst has relatively high selectivity for catalyzing oxidative dehydrogenation of propane to prepare propylene under a low-temperature condition. The technical scheme is as follows: (1) preparing a cobalt nitrate hexahydrate aqueous solution; (2) adding sodium molybdate dihydrate into the cobalt nitrate hexahydrate aqueous solution, and stirring for 30 minutes at normal temperature; (3) slowly dropwise adding the mixed solution to AlOOH powder drop by drop and stirring; (4) putting the mixed paste into a ball milling tank for ball milling for 4 hours; (5) centrifugally drying to obtain a solid product; and (6) calcining the solid product at 500 DEG C for 4 hours to obtain a finished product. Belongs to the technical field of thermocatalytic materials and environmental protection.

The application relates to the technical field of high polymer materials, and discloses a nylon material and a preparation method and application thereof. The nylon material comprises the following preparation raw materials in percentage by mass: 70-85% of nylon resin, 8-15% of nitrogen-based flame retardant, 2-8% of phosphorus-based flame retardant and 1-8% of synergistic flame retardant. The nylon material provided by the application adds the phosphorus-based flame retardant and the synergistic flame retardant in a traditional nitrogen-based flame retardant system, so that the ignition temperature of the material is increased, the dropping speed and the dropping ignition probability are reduced, and the flame retardant performance of the material is improved. The ignition temperature of the material can reach 745 DEG C, the DSC crystallization temperature can reach 187 DEG C, the demolding effect is good, the dropping speed is slow, the dropping ignition probability is low, the performance requirements of a battery assembly product on the material can be met, and the nylon material can be used in the preparation of electronic connectors, battery compartments, low-voltage switches, housings or terminal blocks of power distribution systems of electronic and electrical equipment.

This invention relates to the field of wastewater treatment technology, specifically to a microbial preparation, its preparation method, and its application, comprising: a composite microbial agent; and a calcium alginate / polyvinyl alcohol interpenetrating network aerogel carrier loaded with the composite microbial agent; the aerogel carrier contains uniformly dispersed modified nano-attapulgite clay. The microbial preparation of this invention exhibits good wastewater treatment performance and long-lasting effect.

The invention discloses meta-aramid fibrid and a preparation method thereof, the meta-aramid fibrid comprises, by dry weight, 90.0-99.5 wt% of meta-aramid resin and 0.5-10.0 wt% of an amphiphilic block copolymer additive, and the additive comprises at least one of p-N-methyl pyrrolidone or N, N-dimethyl pyrrolidone or N, N-dimethyl pyrrolidone or N, N-dimethyl pyrrolidone or N, N-dimethyl pyrrolidone or N, N-dimethyl pyrrolidone or N, N-dimethyl pyrrolidone or N, N-dimethyl pyrrolidone or N, N-dimethyl pyrrolidone or N, N-dimethyl pyrrolidone. A first block having an affinity for N, N-dimethylacetamide; and at least one second block having an affinity for water. The preparation method comprises the following steps: adding an additive into a meta-aramid resin polymerization liquid to form a composite resin polymerization liquid; injecting the composite liquid into a precipitation bath composed of N-methyl pyrrolidone or N, N-dimethylacetamide and water through a dispersing device, and after precipitation, carrying out solid-liquid separation, washing and drying to obtain the fibrid. Through the synergistic effect of a specific additive and a precipitation bath system, the microstructure of the fibers is actively regulated and controlled, and the specific surface area and the surface roughness of the fibers are improved, so that the tensile strength and the internal bonding strength of finished paper are remarkably enhanced, and meanwhile, the inherent high-temperature-resistant, flame-retardant and insulating properties of meta-aramid fibers are kept.

The application discloses an ozone micro-nano bubble coupling ultraviolet oxidation wastewater treatment process, which comprises the following steps: filtered wastewater is pumped by a booster pump, and then sequentially passes through a micro-nano bubble jet device connected with an ozone generator and a flow-through ultraviolet lamp, and finally enters an oxidation contact tank; the wastewater in the oxidation contact tank is continuously circulated by the wastewater booster pump, and treated wastewater is discharged after COD reaches a standard. The ozone micro-nano bubble coupling ultraviolet oxidation wastewater treatment process has the advantages that the process is used for treating chemical industrial park wastewater by adopting the ozone micro-nano bubble technology coupling ultraviolet jet advanced oxidation process, ozone utilization rate is high, process conditions are mild, and the removal effect of wastewater COD is good, so the process has great potential in the field of wastewater treatment; the ozone micro-nano bubble coupling ultraviolet advanced oxidation process requires less hardware equipment and has low operation cost, so the process has a broad application prospect in the field of engineering wastewater treatment.

This invention provides an ion-doped calcium oxalate thermochemical heat storage material and its preparation method, the chemical formula of which is Ca. 1‑ x M x C2O4·H2O, where M is a dopant ion and x is the mole fraction of the dopant ion; M includes Mg 2+ Co 2+ Zn 2+ 、Sr 2+ One or more of the following. This invention regulates the lattice parameters, local coordination environment, defect state, and microstructure of calcium oxalate by doping with ions. While maintaining the original reversibility and cycle stability of the calcium oxalate system, it further optimizes its dehydration thermal storage temperature range, thermal response boundary, structural evolution behavior, and application compatibility materials, thereby improving the thermochemical thermal storage performance of calcium oxalate from the internal structural level.

The present application relates to the technical field of catalyst recovery, and discloses a method for recovering low-concentration rhodium catalyst from organic residues containing rhodium catalyst, comprising the following steps: (1) adding a modified temperature-sensitive polymer aqueous solution into isopentanal mother liquor, stirring, and layering after standing; (2) heating the water phase obtained after separation, and causing the rhodium-adsorbed polymer to phase change and precipitate, and then filtering and roasting, so as to obtain the recovered rhodium catalyst. The present application realizes the recovery of low-concentration rhodium catalyst from organic residues containing rhodium catalyst, has high recovery rate, is energy-saving and environment-friendly, has mild process conditions, and can effectively expand the application range of rhodium catalyst.

The application discloses a preparation method of 1,2-propylenediamine, which comprises the following steps: (1) 2-phenyl-5-methyl-2-oxazoline, ZIF-8 catalyst and liquid ammonia are added into a high-pressure reaction kettle, and after temperature rising, stirring and filtration, benzoyl 1,2-propylenediamine is obtained; (2) the benzoyl 1,2-propylenediamine obtained in the step (1), methanol and an alkali metal catalyst are added into an atmospheric pressure reaction kettle with a reflux device, after temperature rising and stirring, sulfuric acid is added to neutralize the alkali metal catalyst, after neutralization, the mixture is filtered, and the filtrate is subjected to distillation to obtain a mixture of methyl benzoate and 1,2-propylenediamine; (3) the mixture obtained in the step (2) is separated by rectification to obtain 1,2-propylenediamine products. The preparation method can reduce the production cost, the process condition is relatively mild, hydrogen is not needed to participate in the amination reaction, the process safety is higher, the raw material conversion rate is high, close to 100% conversion, the synthesis yield is higher than 90%, the preparation process is efficient and safe.

A method for the synergistic lithium and phosphorus supplementation and targeted regeneration of lithium iron phosphate (LFP) cathode materials is disclosed, involving a regeneration and repair method for retired LFP cathode materials. This method aims to address the technical problems of poor uniformity, poor electrochemical performance, and poor safety associated with existing direct regeneration methods for retired LFP cathode materials. The method comprises: 1. Cathode material stripping and crushing; 2. Preparation of an aqueous repair solution using a reducing agent, lithium salt, and phytic acid; reaction of the degraded LFP black powder in the repair solution; filtration, drying, and segmented sintering to completely reconstruct the material's intact crystal structure and coat it with a highly conductive carbon layer. The regenerated LFP cathode material exhibits a discharge specific capacity of up to 149.7 mAh g⁻¹ at a current density of 1 C. ‑ ¹, and it is cycle-stable, making it suitable for use in the battery industry.

The invention provides radix astragali homogeneous polysaccharide as well as a preparation method and application thereof, and belongs to the field of separation and purification of natural products. The radix astragali homogeneous polysaccharide is composed of glucose and galactose, and the molecular weight of the radix astragali homogeneous polysaccharide is 1900-2200 Da. The preparation method comprises the following steps: performing water extraction and alcohol precipitation on astragalus membranaceus to obtain astragalus membranaceus crude polysaccharide, and performing column chromatography elution on the astragalus membranaceus crude polysaccharide to obtain the homogeneous astragalus membranaceus polysaccharide with the molecular weight of 1900-2200Da. The radix astragali homogeneous polysaccharide has excellent effects of resisting inflammation, regulating intestinal flora, regulating intestinal absorption function, scavenging free radicals, regulating immunity, improving prebiotic activity and resisting pulmonary fibrosis.

This invention discloses a powder coating and its preparation method, belonging to the field of powder coating technology. The powder coating comprises a composite filler with a core-shell-whisker structure. The composite filler includes: a core layer, which is a one-dimensional inorganic thermally conductive material; an intermediate layer, which is composed of polydopamine and coated on the outer surface of the core layer; and an outer shell layer, which is composed of a reactive elastomer and chemically grafted onto the outer surface of the intermediate layer. This invention also discloses the preparation method of the powder coating and its application in electrical insulation components. By constructing a core-shell-whisker structure composite filler and using polydopamine as the intermediate layer to chemically graft reactive elastomer onto the surface of a one-dimensional inorganic thermally conductive material, this invention achieves a synergistic improvement in mechanical properties, thermal conductivity, and insulation properties, and endows the coating surface with self-healing scratches.

This invention discloses a method for preparing and applying a coumaric acid-modified MOF nanopesticide loaded with chlorantraniliprole, belonging to the field of pesticide formulation technology. The nanopesticide comprises: an iron-based metal-organic framework carrier MIL-101(Fe); chlorantraniliprole loaded within the pores of the carrier; and coumaric acid modified on the surface of the carrier through electrostatic interactions. The preparation method includes three steps: MIL-101(Fe) carrier synthesis, chlorantraniliprole loading, and coumaric acid surface modification. The process is simple and the conditions are mild. This invention utilizes the alkaline environment of the fall armyworm's gut to trigger carrier degradation, achieving targeted and controlled release of active molecules. Simultaneously, the released MIL-101(Fe) is reduced under the action of GSH in the gut, generating reactive oxygen species through the Fenton reaction, forming a synergistic insecticidal effect with coumaric acid. Experiments have shown that this nanopesticide exhibits far superior insecticidal activity against fall armyworm compared to single agents or carriers, possessing excellent insecticidal activity and environmental compatibility, making it suitable for green agricultural production.

This invention discloses an extraction-azeotropic coupled distillation process for the separation of pyridine bases. A mixed pyridine base feedstock is continuously fed into the middle inlet of an extractive distillation column, while the extractant is continuously added below the reflux port at the top. 3-methylpyridine, 2-methylpyridine, and the extractant are collected from the bottom of the column. The resulting bottom stream is fed into an extractant recovery column for conventional distillation. The regenerated extractant is collected from the bottom and recycled back to the extractive distillation column. The resulting crude pyridine stream is fed into the middle inlet of an azeotropic distillation column, while the azeotropic agent is continuously added below the reflux port at the top. The azeotropic agent reacts with trace amounts of 2-methylpyridine in the crude pyridine to form a low-boiling-point azeotrope, which is distilled off from the top of the column. The high-purity pyridine product is collected from the bottom of the azeotropic distillation column. This invention combines extractive distillation and azeotropic distillation for the separation of pyridine bases, achieving high separation of pyridine base mixtures with low energy consumption, significantly improving product purity and feedstock utilization.

A slow-release composite fiber membrane for encapsulating passion fruit peel flavonoids by electrospinning and its preparation method are disclosed. The composite fiber membrane is prepared by coaxial electrospinning and consists of a core layer and a shell layer. The core layer is a carrier solution containing passion fruit peel flavonoids, and the shell layer is a biodegradable polymer solution. The composite fiber membrane has an encapsulation rate of ≥85% for passion fruit peel flavonoids and possesses antioxidant and slow-release properties. Chitosan, gelatin, zein, and β-cyclodextrin are used as spinning wall materials, and passion fruit peel flavonoids extracted by DES method are used as the functional core material. Efficient encapsulation, controlled release, and stabilization of flavonoids are achieved through coaxial electrospinning. This invention solves the problems of easy oxidation, photothermal instability, poor water solubility, and low bioavailability of flavonoids.

This invention provides a Cu-supported Y molecular sieve catalyst, its preparation method and application, and a method for preparing dimethyl carbonate using carbon dioxide. The method for preparing dimethyl carbonate using carbon dioxide includes: reacting carbon dioxide and dimethyl ether in the presence of a copper-containing catalyst to produce dimethyl carbonate; the copper-containing catalyst includes a Y molecular sieve and copper supported on the Y molecular sieve. This invention uses a copper-supported Y molecular sieve to catalyze the reaction of dimethyl ether with carbon dioxide. The reaction conditions are mild, the reaction product contains only dimethyl carbonate, with no byproducts generated, achieving 100% atom economy. It utilizes the greenhouse gas CO2, reducing environmental pollution. Furthermore, since no water byproduct is generated in the reaction, the adverse effects of water on catalyst activity and dimethyl carbonate selectivity are effectively avoided, significantly improving the yield of dimethyl carbonate. The operation is simple, the process conditions are mild, reducing costs and improving industrial production efficiency.

The invention discloses an Ag monatomic modified In2O3 single crystal film prepared based on pulse voltage discharge, a method thereof and a gas sensitive sensor, and the method comprises the following steps: 1) placing a substrate in a vacuum cavity of magnetron sputtering equipment, taking an indium oxide target as an In source, and growing on the substrate through a magnetron sputtering technology to obtain an indium oxide single crystal film; the substrate is yttrium oxide stabilized zirconia (YSZ); (2) placing the indium oxide single crystal thin film obtained in the step (1) on a vacuum chamber sample table which is internally provided with a pulse voltage discharge electrode and an Ag target material, evaporating Ag particles based on a pulse voltage discharge process, and depositing the Ag particles on the surface of the indium oxide single crystal thin film material to form dispersed clusters; and annealing to obtain the Ag single atom modified In2O3 single crystal thin film. The synthesis of a sensitive material with a high atom utilization rate and a stable structure is realized, and an advanced NO2 gas sensing device with high sensitivity and high selectivity is obtained.

The application provides a copper sulfide gold-bearing ore flotation method based on interface selective oxidation and copper ion synergistic effect, and relates to the field of mineral flotation. The method comprises the following steps: carrying out first mixing and first reaction on the pulp of copper sulfide gold-bearing ore treated by an organic sulfur inhibitor and a mild oxidation medium to obtain oxidized pulp; carrying out second mixing and second reaction on the oxidized pulp and a copper ion regulating component to obtain copper ion regulated pulp; and carrying out third mixing and flotation on the copper ion regulated pulp, a collector and a foaming agent to obtain gold-containing concentrate. The method does not aim to improve the overall floatability of copper sulfide minerals, realizes efficient recovery of gold existing in copper sulfide minerals under the premise of not damaging the original copper-molybdenum separation system selectivity, and is suitable for various copper sulfide gold-bearing ore systems.

The invention relates to a preparation method of soluble sugar substitute based on Jinxiu sweet tea pigment, and belongs to the technical field of food processing and natural product extraction.The preparation method comprises the steps that Jinxiu sweet tea leaves serve as raw materials, and composite enzymolysis, hot water extraction, membrane separation and concentration, stable blending and spray drying are sequentially conducted. The method comprises the following steps: synergistically releasing sweet taste and pigment components through enzymolysis and extraction, purifying and concentrating through a membrane technology, and protecting through a stabilizer system to finally obtain a powdery product. The sugar substitute has high sweetness and stable brownish red color, realizes integration of sugar and color, can be used as a natural sweetening agent and a coloring agent to be directly used in milk tea, coffee and other food beverages, simplifies the formula and process, and meets the label cleaning requirements.

The application relates to a synergistic liquid antioxidant containing chicken-derived active peptides and phospholipids, and relates to the technical field of food additives or health products. The antioxidant comprises the following components in parts by weight: chicken-derived active peptides 2-10%; phospholipids 0.5-5%; stabilizers 0.1-2%; water 60-90%; and the weight ratio of the chicken-derived active peptides to the phospholipids is (2-6):1. By compounding the chicken-derived active peptides and the phospholipids in a specific ratio, the two can form a stable emulsification system and produce a significant antioxidant synergistic effect, effectively eliminating free radicals and inhibiting lipid peroxidation. Meanwhile, the liquid antioxidant has good stability and high bioavailability, can be widely applied in oils, pet foods, oil-containing foods, feed products and cosmetics, and can replace traditional synthetic antioxidants.

This invention provides a method for preparing high-proportion aragonite-type calcium carbonate and ammonium sulfate fertilizer by mineralizing CO2 using desulfurized gypsum. The method includes the following steps: First, desulfurized gypsum is mixed with water to obtain a mixture. Ammonia and serine are added to the mixture to obtain a suspension. Second, CO2-containing flue gas is introduced into the bottom of the suspension until the pH of the reaction system reaches approximately 7. The flue gas is then stopped, and solid-liquid separation is performed to obtain a solid product containing a high proportion of aragonite-type calcium carbonate and an ammonium sulfate solution containing heavy metal ions. Finally, the heavy metals in the ammonium sulfate solution are removed, and crystallization is performed to obtain fertilizer-grade ammonium sulfate crystals. This invention features a simple process, yields high-purity aragonite-type calcium carbonate as the solid product, and the prepared ammonium sulfate crystals can be directly used as nitrogen fertilizer in agricultural production. This achieves efficient treatment and resource utilization of desulfurized gypsum, while also capturing and utilizing some CO2 from the flue gas.

The present application provides a sunlight-resistant colored electrochemical energy storage fabric based on recycled cotton powder and a preparation method thereof, belonging to the technical fields of flexible electronic textiles and electrochemical energy storage. The preparation method first deposits a TiO2 film on the recycled cotton powder by ALD technology, and then performs mild hydrothermal synthesis to obtain a TMOs@TiO2@CP composite powder with a three-layer nested structure. Among them, the TiO2 film protects the internal recycled cotton powder from erosion during the hydrothermal reaction and is tightly combined with the TMOs functional layer through Ti-O-TM covalent bonds, improving the structural stability and interfacial bonding force of the composite powder. The present application uses the inherent color characteristics of different transition metal oxides to replace traditional black carbon-based materials, endowing the energy storage fabric with rich color choices and meeting the aesthetic and design requirements of high-end textiles. The process route of the present application avoids the damage to the inherent flexibility and structure of cotton fabrics by drastic means such as high-temperature carbonization.

The application relates to the technical field of medicines, and particularly provides a preparation method of lecomycin based on a biosynthesis process. The application first provides a 4''-ketone erythromycin A compound and a recombinant host cell capable of efficiently fermenting the compound. A brand-new semi-chemical synthesis route of lecomycin is designed by taking the key intermediate as a raw material, and the route comprises, in sequence, epoxidation, amination, 6-position oximation, configuration inversion, rearrangement, reduction and ring expansion. The application completely avoids the cumbersome hydroxyl and amino protection and deprotection steps in the prior art, avoids the use of noble metal catalysts, thereby significantly simplifies the process, improves the atomic economy, and the total yield can reach about 32.1%. The application provides a brand-new green synthesis route of lecomycin, which is simple in steps, high in yield, low in cost and easy to industrialize, and meanwhile protects a plurality of novel intermediates in the route.

This invention discloses the application of *Pteris vittata* oil in skincare products. The preparation method of the *Pteris vittata* oil involves first extracting the raw material using supercritical CO2 extraction technology to obtain crude *Pteris vittata* oil; then purifying the crude *Pteris vittata* oil through multi-stage molecular distillation, collecting the light fraction to obtain the final *Pteris vittata* oil. This preparation method can efficiently enrich the antioxidant active ingredients such as tocopherols, squalene, and polyunsaturated fatty acids in the *Pteris vittata* oil. The prepared *Pteris vittata* oil exhibits excellent scavenging ability against DPPH free radicals, superoxide anions, and ABTS free radicals, while significantly enhancing SOD activity, reducing MDA levels, and minimizing oxidative stress damage, thereby exerting antioxidant and anti-aging effects. This provides a safe, gentle, and highly effective natural raw material for anti-aging, whitening, and skin barrier repair skincare products, and has promising market application prospects.

The invention relates to the technical field of plant active ingredient extraction, and particularly discloses a method for efficiently preparing paeonol from moutan bark based on improved aqueous two phases. The method comprises the following steps: (1) extracting moutan bark powder in an aqueous two-phase system for 6-8 hours at 35-40 DEG C, and separating to obtain an upper phase solution rich in paeonol; wherein the aqueous two-phase system is composed of a sodium dihydrogen phosphate aqueous solution, tetrahydrofuran, ethanol and ethyl acetate, and the pH value of the sodium dihydrogen phosphate aqueous solution is 3.0-4.0; (2) sequentially carrying out vacuum concentration and drying on the upper-phase solution to obtain a paeonol crude product; and (3) recrystallizing the crude paeonol product for 4-6 hours by using a 70-75 vol% ethanol aqueous solution at 4-10 DEG C, filtering and drying in vacuum to obtain high-purity paeonol. The method provided by the invention can significantly improve the partition coefficient, yield and product purity of paeonol, reduce the use amount of the organic solvent and shorten the extraction time, has the advantages of environmental protection, simplicity, convenience, low production cost and the like, and is suitable for large-scale production.

The invention discloses a desulfurizing agent for acidizing a sulfur-containing reservoir, which is prepared from the following components in percentage by volume: 20 to 30 percent of compound complex iron reagent, 15 to 20 percent of amine reagent, 5 to 15 percent of activating agent and 35 to 60 percent of solvent water, and the sum of the volume contents of the components is 100 percent. The desulfurizing agent for acidification of the sulfur-containing reservoir solves the problems that in the prior art, the compatibility of a desulfurizing agent and other reagents in the acidification process is poor, and the acting effect is affected. The invention further discloses a preparation method of the desulfurizing agent for acidification of the sulfur-containing reservoir.

The invention discloses a preparation method of a catalyst for producing hydrogen peroxide through oxygen deficiency tandem piezoelectric-mechanical redox, and the preparation process of the catalyst comprises the following steps: firstly, constructing a zinc oxide substrate with a litchi-shaped structure through a water-phase thermally-induced self-assembly reaction; then introducing oxygen defects with controllable content on the surface of zinc oxide by adopting a liquid-phase mediated chemical reduction mode; and finally, performing in-situ auto-polymerization on the surface of the defective zinc oxide to form a polydopamine coating, thereby obtaining the target catalyst. The catalyst can efficiently and highly selectively prepare hydrogen peroxide through ultrasonic excitation under the conditions of pure water and normal temperature, has the advantages of mild reaction conditions, high generation rate, good stability, environmental protection and the like, and is suitable for the application scene of distributed hydrogen peroxide in-situ preparation.