17results about How to "Simple process conditions" patented technology

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.

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 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.

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.

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 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.