27results about How to "Simple process conditions" patented technology

The invention provides a medical packaging material and a preparation method thereof.The preparation method comprises the steps that S100, polypropylene, maleic anhydride grafted co-polypropylene, peroxide and filler are mixed, then melt extrusion and two-way stretching are conducted, and a printing layer is obtained; s200, respectively preparing a barrier layer and a heat sealing layer; and S300, the heat sealing layer, the blocking layer and the printing layer are sequentially stacked from inside to outside, and the packaging material is obtained. Through the preparation method of the packaging material, the prepared packaging material has excellent barrier property and antibacterial property while resisting high temperature, and can meet the requirements of the medical field.

The invention relates to the technical field of wastewater treatment, in particular to a preparation method and application of iron modified montmorillonite. The preparation method comprises the following steps: adding montmorillonite into water, carrying out ultrasonic treatment, and then centrifuging to obtain supernate; centrifuging the supernate, and freeze-drying the obtained precipitate to obtain pretreated montmorillonite; dispersing the pretreated montmorillonite in water, adjusting the pH value of the solution to be acidic, and stirring; then adding ferric iron salt, stirring and centrifuging; dispersing precipitates obtained by centrifugation into a ferric iron salt solution, stirring and centrifuging; repeating the steps of dispersing the precipitate obtained by centrifugation into the ferric iron salt solution, stirring and centrifuging; and washing the precipitate obtained by the last centrifugation, and then freeze-drying to obtain the iron modified montmorillonite. The iron-modified montmorillonite can effectively degrade the triazine herbicide simazine, is simple to prepare, wide in raw material source and low in price, and has important significance in removal of refractory pollutant triazine herbicides.

According to the high-entropy lithium manganese iron phosphate positive electrode material and the preparation method and application thereof, manganese, iron and other transition metal elements are skillfully and uniformly mixed by accurately controlling the proportion of metal elements and performing grinding for three times and stirring for one time; on the basis, a low-temperature carbonization and high-temperature calcination double-stage sintering strategy is utilized to prepare the high-entropy lithium manganese iron phosphate positive electrode material, the material has relatively high mixed entropy, a stable single-phase solid solution structure is formed, the ginger-Taylor effect of a manganese element is effectively inhibited, the capacity retention rate in 150 cycles is as high as 98%, and excellent cycle stability is shown. The method is simple in process condition, easy in process control and easy to realize large-scale industrial production; under the reduction action of the carbon source, a cheap ferric iron source can be used for replacing a ferrous iron source, so that the production cost is reduced; and the solution can be recycled, is green and environment-friendly, and has great economic benefits.

The invention discloses hydrogel wound application and a preparation method thereof, and relates to the technical field of wound application. The formula of the hydrogel wound application is adjusted, so that the hydrogel wound application can be prepared at normal temperature, redundant containers are not needed, and meanwhile, the hydrophilic alginate fibers are added, so that the toughness of gel is improved, and the phenomena of breakage, fracture and lacking of gel caused by insufficient strength of the gel are reduced.

The invention provides an antibacterial flame-retardant bamboo-wood composite shaving board and a preparation method thereof. According to the bamboo-wood composite shaving board manufactured through the method, the mechanical property can be kept, and meanwhile the good flame retardant effect is achieved. The composite flame retardant disclosed by the invention is simple in preparation method, cheap and easily available in raw materials, capable of saving cost and relatively high in industrial production value. The bamboo-wood composite shaving board does not need a layered preparation process, is simple in overall process condition, and is environment-friendly and safe.

This invention discloses a method for extracting the intermediate ACH, belonging to the field of fine chemicals. The method involves passing a layered acid containing acesulfame potassium (DCM) and a dichloromethane solution into a rotary extraction tower for extraction. The temperature of the layered acid entering the tower is 30-31°C. The extraction pressure and the temperature of the dichloromethane entering the tower are controlled. The extracted dichloromethane layer enters a vibrating extraction tower for back-extraction with deionized water. The back-extracted DCM is neutralized, concentrated, crystallized, and dried to obtain the finished product, potassium acesulfame potassium. Using this method, the ACH content in the extracted acid is reduced to below 0.1%, and the ACH extraction yield reaches over 98%. Because the rotary extraction tower effectively reduces the acid carryover in the DCM, it lowers the back-extraction load, ensuring the product quality of potassium acesulfame potassium. Simultaneously, it simplifies the process conditions, reduces energy consumption, and saves production costs.

This invention provides an ultrafine intermediate molybdenum oxide material and its preparation method. The method involves placing ammonium molybdate in a reaction vessel and heating it in a vacuum environment at 400℃–600℃ for at least 3 hours to obtain the ultrafine intermediate molybdenum oxide material. The reaction vessel is a sealed structure except for the exhaust end, which is equipped with a one-way gas flow valve. The Fisher particle size of the ultrafine intermediate molybdenum oxide material is 0.8–1.0 micrometers. The method uses a reaction vessel equipped with a one-way gas flow valve, preventing external air from entering during the roasting process while simultaneously allowing the exhaust of gases generated during decomposition, thus ensuring the purity of the obtained molybdenum oxide material. The process conditions are simple and easy to control, making it suitable for industrial production. This material, with its small particle size and high purity, has broad application prospects.

The application belongs to the technical field of microcapsules, and particularly relates to a preparation method of a composite probiotic capsule, which comprises the following steps: uniformly mixing probiotic bacterial liquid, fructooligosaccharide, tea polyphenol, grape polyphenol, mannan oligosaccharide, isomaltitol and an emulsifier to obtain a core material; uniformly mixing glycerol and distilled water, heating to 60-80 DEG C, sequentially adding modified gelatin, hydroxypropyl starch and chitosan, stirring for 10-30 min, sterilizing, and cooling to room temperature to obtain a capsule material; mixing the core material and the capsule material, performing high-pressure homogenization treatment, and then performing spray drying to obtain the composite probiotic capsule; and the modified gelatin is prepared by acylation reaction of succinic acid derivatives and gelatin. The composite probiotic capsule provided by the application has excellent storage stability, antioxidant property, anti-gastric juice erosion capacity, and also has good enteric solubility and bioavailability.

This invention discloses a method for preparing trifluoropropionic acid, comprising the following steps: Step 1, reacting acetic acid with trifluoropropylene under the action of a catalyst to obtain trifluoropropyl acetate; Step 2, transesterifying trifluoropropyl acetate with methanol to obtain trifluoropropanol; Step 3, oxidizing trifluoropropanol with hydrogen peroxide under the action of a catalyst to obtain trifluoropropionic acid. This invention has a high yield, simple process conditions, and cheaper raw materials, which can significantly reduce the cost of trifluoropropionic acid.

The present invention provides a mixed C4 conversion method, which comprises: 1, carrying out full hydrogenation treatment on mixed C4 so as to convert olefins in the mixed C4 into alkanes, step 2, separating the mixture treated in the step 1 to respectively obtain an n-butane component and an isobutane component; and step 3, carrying out oxidation treatment on the n-butane component obtained in the step 2 to obtain maleic anhydride. According to the method, closed-loop conversion of the mixed C4 to the chemical material can be realized, each component can be fully utilized, almost no waste is generated, and meanwhile, each process condition in the method is mild, easy to control, short in flow and simple in process.

This invention discloses a method for establishing the relationship between the carbonization performance and carbonization structure of low-carbon clinker, comprising the following steps: 1) determining the optimal water-cement ratio w / c and the corresponding molding amount c of the low-carbon clinker using a pressing molding method; 2) performing pressing molding, drying, carbonization curing, and measuring the compressive strength σ of the obtained carbonization product based on the determined w / c and c. c and carbon fixation rate r c 3) Calculate the volume percentage W of CaCO3 formed after carbonization. VCaCO3 The volume percentage of the remaining low-carbon clinker W Vc Then calculate the total volume ratio W between the two. 总 ;4) Establish compressive strength σ c Percentage of total volume W 总 The present invention establishes a stoichiometric relationship between the carbonization performance and carbonization structure of low-carbon clinker. This relationship directly reflects the carbonization performance of low-carbon clinker and can be used to guide the efficient application of different types of low-carbon clinker, making it suitable for widespread application.

The utility model belongs to the technical field of automobile model frame forming equipment, and particularly relates to an automobile model frame die-casting forming device which comprises a lower die-casting die shell and an upper die-casting die shell buckled with the lower die-casting die shell, and a casting hole is formed in the center of the upper end of the upper die-casting die shell. A dismounting structure is connected between the lower die-casting die shell and the upper die-casting die shell; the disassembly and assembly structure comprises lower fixing plates and upper fixing plates, the lower fixing plates are fixedly installed on the surfaces of the two ends of the lower die-casting die shell, the upper fixing plates are fixedly installed on the surfaces of the two ends of the upper die-casting die shell, and inserting vertical rods are fixedly welded to the surfaces of the upper ends of the lower fixing plates. And the limiting insertion rods and the limiting insertion holes are in matched insertion connection, so that rapid positioning and stable connection of the mold are achieved. In the disassembly and assembly process, an operator can easily separate or lock the mold only by pulling the sliding butt strap, and complex tools and tedious steps are not needed.

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.

The invention discloses a method and a device for activating the performance of cadmium telluride power generation glass, relates to the technical field of preparation of cadmium telluride power generation glass, and solves the problems that the existing performance activation method is long in time, incomplete in performance activation and difficult to control, and the product is damaged by parameters in the process. The method comprises the following steps: S1, taking a product needing to be activated, controlling the temperature to a first preset temperature, and carrying out dark-state thermal activation; s2, heating the product obtained in the step S1 to a second preset temperature, keeping the constant temperature, and sequentially carrying out first-stage light activation and electron activation; s3, heating the product obtained in S2 to a third preset temperature, keeping the constant temperature, and sequentially carrying out second-stage light activation and electron activation; s4, cooling the product obtained in S3 to a second preset temperature; keeping constant temperature and sequentially carrying out third-stage light activation and electron activation; and S5, cooling the product obtained in the step S4 to a fourth preset temperature, and completing performance activation. The invention further provides a device based on the method.

The application provides an extraction method of high-purity type I collagen, and belongs to the technical field of biomedical materials. The application realizes efficient and stable extraction of type I collagen by accurately selecting process conditions, significantly improves the purity and extraction efficiency of the target product, and the obtained collagen has complete three-dimensional structure, extremely low impurity residue and water content, greatly improves the biocompatibility and storage stability of the product, the method is simple in process, easy to control in condition, does not need complex large-scale equipment, is suitable for large-scale production, provides a reliable high-quality raw material source for high-end implant medical devices, and expands the application prospect of collagen in the field of biomedicine.

The application discloses a zirconium-based porous metal organic framework catalyst, a preparation method and application. The catalyst is an MOF808 catalyst prepared from Zr salt and 1,3,5-benzene tricarboxylic acid in a molar ratio of 1:1. The catalyst, benzoic acid, benzylamine and a reaction solvent are placed in a reaction container, and an amine acid condensation reaction is carried out under nitrogen protection to obtain N-benzyl benzamide. The reaction temperature of the amine acid condensation reaction is 40-120 DEG C, and the reaction time is 2-24 h. The catalyst can efficiently and selectively condense benzoic acid and benzylamine to prepare N-benzyl benzamide under the condition that the reaction temperature is 90 DEG C and the solvent is tetrahydrofuran, and has the advantages of high conversion efficiency, good product selectivity, mild reaction condition, easy recycling and the like.

The application provides a mixed carbon four conversion method, comprising the following steps: step 1, full hydrogenation treatment is carried out on the mixed carbon four so that olefins in the mixed carbon four are converted into alkanes; step 2, the mixture after step 1 treatment is separated to obtain a normal butane component and an isobutane component respectively; and step 3, the normal butane component obtained in step 2 is subjected to oxidation treatment to obtain maleic anhydride. The method can realize closed loop conversion of the mixed carbon four to chemical materials, each component can be fully utilized, and almost no waste is produced. Meanwhile, the process conditions in the method are mild, easy to control, the flow is short, and the process is simple.

This invention relates to the field of soil remediation, and more particularly to a highly efficient remediation agent for acidic soils and its preparation method. The remediation agent consists of hydroxyapatite-modified biochar, MOF biochar composite, and lime. Compared with existing technologies, this invention not only regulates soil acidity but also provides abundant nutrients and improves soil structure. Lime can rapidly neutralize hydrogen ions in acidic soils, quickly increasing soil pH, enabling the remediation agent to improve soil acidity in a short time while achieving both short-term and long-term remediation effects. The raw materials for biochar preparation include agricultural waste such as cow dung, which are widely available and inexpensive, realizing the resource utilization of waste. Lime is also a common soil conditioner, relatively inexpensive and readily available, helping to reduce the overall production cost of the remediation agent and improve its economic feasibility and application scope.

The application discloses a hydrogenation isomerization catalyst and a method for hydrogenating a Fischer-Tropsch synthesis soft wax to obtain a lubricating oil base oil. The hydrogenation isomerization catalyst is a composite catalyst, which comprises catalyst I and catalyst II; the catalyst I is a molecular sieve catalyst with MTT structure loaded with platinum and / or palladium; the catalyst II is a molecular sieve catalyst with TON structure loaded with platinum and / or palladium; and the composite mode of the catalyst I and the catalyst II is that the catalyst I is located above the catalyst II. Based on the hydrogenation isomerization process of the noble metal / molecular sieve catalyst with the combined MTT structure and TON structure and specific catalytic performance, each component in the Fischer-Tropsch synthesis soft wax raw material, such as n-alkanes, branched alkanes and olefins, can be converted into isomerization products with high selectivity, so that the yield and performance of the base oil product are simultaneously improved.

A synergistic system for waste treatment is provided. The synergistic system includes a waste treatment system configured to perform biological treatment of waste. Further, the synergistic system includes a gas purification system configured to purify off-gas generated during the biological treatment of waste. The synergistic system further includes a feedback system configured to feedback excess heat from the gas purification system back to the waste treatment system. The waste treatment system is further configured to use the feedbacked excess heat for the biological treatment of waste.

The invention belongs to the technical field of organic synthesis, and particularly relates to a preparation method of 3, 5-dichloro-2-aminobenzoyl isopropylamine, o-nitrobenzoic acid is taken as an initial raw material, 80% hydrazine hydrate is dropwise added, a catalyst prepared in advance is matched, o-aminobenzoic acid is prepared, then the o-aminobenzoic acid is dissolved in dichloroethane to react with sulfuryl chloride, and 3, 5-dichloro-2-aminobenzoyl isopropylamine is prepared. The preparation method comprises the following steps: reacting 3, 5-dichloro-2-aminobenzoic acid with triphosgene under an alkaline condition to generate 3, 5-dichloro-2-aminobenzoyl chloride, and reacting the 3, 5-dichloro-2-aminobenzoyl chloride with isopropanolamine to obtain the final product 3, 5-dichloro-2-aminobenzoyl isopropylamine. By reasonably controlling the raw material ratio and reaction conditions in each step, the reaction in each step is sufficient, the obtained 3, 5-dichloro-2-aminobenzoyl isopropylamine is high in purity and yield, the used raw materials are cheap and easy to obtain, the requirements on production equipment are low, the process conditions are simple, the labor and energy consumption are greatly reduced and saved, the cost is low, and industrial production is easy.

An integrated structure of cocatalyst / heterogeneous structure / tungsten trioxide photoanode, its preparation method, and its application are disclosed, belonging to the fields of biomass conversion and photoelectrocatalysis. First, a zinc oxide / tungsten trioxide heterostructure is synthesized via hydrothermal, spin-coating, and calcination methods. Then, a noble metal-modified nickel phosphide cocatalyst is synthesized via phosphating and loaded onto the surface of the heterostructure to successfully construct an integrated system of cocatalyst / heterogeneous structure / photoanode. The zinc oxide and tungsten trioxide heterostructure can suppress the recombination of photogenerated carriers, while the noble metal-modified cocatalyst can reduce the interfacial resistance between the heterostructure and the electrolyte, accelerate the migration of photogenerated holes, significantly reduce the surface energy barrier, improve surface reaction kinetics, and prolong the lifetime of photogenerated charges. This results in excellent photoelectrocatalytic glycerol oxidation performance, producing only two C3 products: glyceraldehyde and 1,3-dihydroxyacetone. The limited product diversity provides a feasible pathway for improving the high-value coupling of photoelectrocatalytic biomass to hydrogen production.

A synergetic system for waste treatment is provided. The synergetic system includes a waste treatment system configured to perform biological treatment of waste. Additionally, the synergetic system includes a gas purification system configured to purify exhaust gas generated during the biological treatment of the waste. The synergetic system further includes a feeding system configured to feed excess heat from the gas purification system back to the waste treatment system. The waste treatment system is further configured to use the fed back excess heat for the biological treatment of the waste.

This invention relates to a strontium titanate / boron nitride nanotube composite ceramic core, its preparation method, and its application. The composite ceramic core is prepared using strontium titanate and boron nitride nanotubes, with the boron nitride nanotubes comprising 0.1-3% by mass. The preparation method is as follows: a surface-modified boron nitride nanotube slurry is slowly added to a strontium titanate slurry to obtain a strontium titanate / boron nitride nanotube slurry; the strontium titanate / boron nitride nanotube slurry is heated and stirred to obtain a strontium titanate / boron nitride nanotube composite powder; the strontium titanate / boron nitride nanotube composite powder is pressed into a core blank and sintered to obtain the strontium titanate / boron nitride nanotube composite ceramic core. Compared with the prior art, this invention can effectively improve… 90 Thermal conductivity and mechanical properties of SrTiO3 ceramic core.

The invention relates to the technical field of catalysts and discloses a high-entropy catalyst for CO hydrogenation catalytic synthesis of light olefins as well as a preparation method and application of the high-entropy catalyst. The method comprises the following steps: mixing six metal salts into deionized water to form a uniform solution, then adding citric acid, stirring for a certain time, putting the solution into a water bath at 90 DEG C, and stirring and heating to form uniform gel; taking out the gel, drying and calcining to obtain a catalyst precursor; the prepared catalyst can dissolve out FeCo alloy in situ during hydrogen reduction, and the FeCo alloy is gradually converted into active sites in the CO hydrogenation process. In addition, by adjusting the proportion of metal iron and cobalt in the catalyst precursor, the number of active sites on the surface of the catalyst is effectively adjusted, and the high-entropy catalytic activity is improved. The prepared catalyst has the advantages of simple process, easiness in large-scale production, high olefin selectivity and the like.

The invention relates to the technical field of high polymer materials and packaging, in particular to a production process of an EB curing food packaging composite film and a product. Comprising the following steps: S1, providing a food-grade packaging base material, and pretreating the packaging base material; the packaging base material at least comprises a first packaging base material and a second packaging base material; s2, coating the pretreated surface of the first packaging base material with an EB adhesive; s3, laminating the pretreated surfaces of the first packaging base material and the second packaging base material coated with the EB adhesive to obtain a composite packaging film; s4, carrying out electron beam curing treatment on the composite packaging film; and S5, cooling and rolling the composite packaging film subjected to electron beam curing treatment to obtain a composite packaging film finished product. The viscosity of the EB adhesive at the temperature of 100 DEG C ranges from 1000 cps to 10000 cps. The obtained composite film is environment-friendly, high in initial positioning capacity, efficient in production, reliable in performance and capable of meeting the use requirements of food packaging materials.

The invention relates to the field of anti-fingerprint agents, and particularly discloses perfluoropolyether phosphoric acid, a preparation method thereof and an anti-fingerprint agent. The preparation method of the perfluoropolyether phosphoric acid comprises the following steps: S1, carrying out ammonolysis reaction on perfluoropolyether monomethyl ester and trihydroxymethyl aminomethane to obtain an intermediate I; s2, carrying out phosphorylation reaction on the intermediate I and phosphorus oxychloride to obtain an intermediate II; and S3, hydrolyzing the intermediate II to obtain the perfluoropolyether phosphoric acid. The perfluoropolyether phosphoric acid prepared by the invention can form a P-O-M bond with a metal oxide, so that the adhesive force of an anti-fingerprint agent on metal and a metal oxide substrate is remarkably improved, and the antifouling property can be maintained for a long time; the perfluoropolyether phosphoric acid contains three phosphoric acid groups, so that the hydrophobic antifouling effect and the friction resistance of a coating after the anti-fingerprint agent is cured into a film can be further enhanced, the durability of the coating is improved, and the perfluoropolyether phosphoric acid is particularly suitable for the surfaces of metal and metal oxide substrates.