185results about How to "Economical method of preparation" patented technology

The invention belongs to the technical field of synthesis of inorganic porous materials and particularly relates to a preparation method of a house-of-cards-like hierarchical porous ZSM-5 molecular sieve which is low in cost, environment-friendly and fast. The preparation method comprises the following steps: adding an inorganic alkali source and an aluminum source into deionized water, and adding a proper amount of N-methyl-2-pyrrolidone (NMP); then, slowly adding a silicon source; fully and uniformly stirring; and synthesizing a house-of-cards-like hierarchical porous HCL-ZSM-5 molecular sieve by a one-step hydrothermal method. The molecular sieve has remarkable hierarchical porous structural characteristics, is large in external surface area, strong in acidity and good in stability, and has wide application prospects in the fields of catalysis, adsorption, separation and the like. In an alkaline ZSM-5 synthetic system without an organic template, by using non-toxic and cheap NMP as a structural guiding agent which is used for replacing an expensive macromolecular organic template, the method is an economic, efficient and environment-friendly synthetic method which is expected to be applied to large-scale commercial production.

The invention discloses a composite reaction medium for removing nitrogen and phosphorus from underground water permeable reactive barriers and a method for preparing the composite reaction medium. The composite reaction medium comprises, by weight, 1.0-3.0 parts of zeolite, 0.7-1.3 parts of bentonite, 0.5-1.5 parts of attapulgite and 1.0-6.0 parts of coal cinder. The zeolite, the bentonite, the attapulgite and the coal cinder are sintered to obtain the composite reaction medium. The composite reaction medium and the method have the advantages that the nitrogen and the phosphorus can be synchronously, efficiently and quickly removed by the composite reaction medium, the composite reaction medium can be used as a biological carrier, accordingly, shortcomings of instability of biological phosphorus removal, large quantity of mud due to chemical phosphorus removal and the like can be overcome, and detour flow of water at the fronts of the barriers and the like can be prevented.

The invention discloses a method for preparing a Pd catalyst with three-dimensional nano meshy structure by reduction of a nitrile rubber precursor, which comprises: mixing K3Co(CN)6 and K2PdC14 by ultrasonic according to a molar ratio of 1:2 in a temperature range of 0 to 100 DEG C, standing and obtaining nitrile rubber A, adding reducer in the same amount or an excessive amount into the nitrile rubber A, standing for 0.1 to 24 hours, reacting nitrile rubber with the reducer, obtaining a component B after reducing the Pd metal , washing the component B, and drying the component B to obtain a palladium catalyst. The catalyst prepared by the method has a three-dimensional meshy structure, has high homogeneity and dispensability, and has high electric catalytic activity and stability for formic acid oxidization. The preparation method disclosed by the invention is simple and economic and is suitable for industrial large-scale production.

The invention provides a phase change energy storage temperature-adjusting internal wall coating and a preparing method thereof. The phase change energy storage temperature-adjusting internal wall coating comprises, by mass, 30%-50% of emulsion, 0.5%-1.5% of dispersing agents, 0.5%-2% of antifreezing agents, 1%-3% of coalescing agents, 1%-2% of thickening agents, 0.5%-1% of defoaming agents, 5%-15% of titanium dioxide, 5%-10% of functional padding, 15%-30% of composite phase change materials and the balance water. According to the phase change energy storage temperature-adjusting internal wall coating and the preparing method, the attapulgite-based paraffin composite phase change materials serve as temperature-control base materials, the obtained phase change coating has good energy storage performance, cheap in price and excellent in weather resistance, energy consumption is saved, the indoor comfort is improved, the phase change coating is not limited by the territory and weather in use due to the adjustable phase change temperature, the application field of the phase change coating is broadened, and the coating has the good economic benefits and environment benefits and wide application prospects.

The invention relates to a method for preparing 1-(1-naphtaline) ethylamine possessing optical activity, which mainly solves problems of current process of expensive original raw material, long synthesizing process, low yield coefficient, and over-high cost and the like; the invention has chiral aspartic acid as chiral resolving agent, water or solution of water and dioxane as solvent; under a heating condition, racemate 1-(1-naphtaline) ethylamine is reacted with chiral aspartic acid to form enantiomeric salt. Then, according to different solubility of 1-(1-naphtaline) ethylamine to enantiomeric salt, splitting is carried out, and two configurations (S configuration and R configuration) of 1-(1-naphtaline) ethylamine are separated and prepared; chiral e.e. value for one time of splittingcan reach over 98 percent, with yield coefficient over 30 percent. The method is mainly used for preparing S configuration 1-(1-naphtaline) ethylamine and R configuration 1-(1-naphtaline) ethylamine drug intermediate possessing optical activity and template compound researched and developed by innovative small molecule drugs.

The invention discloses a preparation method and application of a rhenium disulfide nanoflake. A single-layer and/or few-layer disulfide nanoflake is prepared by mixing a rhenium source with xanthateand carrying out hydrothermal reaction. The method is characterized in that the large-scale commercially-produced xanthate is selected as a sulfur source; the method has good repeatability and low cost, and can be used for preparing the single-layer and/or few-layer disulfide nanoflake. The nanoflake can be applied to the fields of adsorption, photocatalysis, photodegradation, lubrication, photoelectronic devices and the like.

Provided is a method of manufacturing high-purity, high-quality manganese sulfate which can be immediately used for manufacturing a lithium ion secondary battery from manganese sulfate waste liquid of a wasted battery. Since impurities are removed from the manganese sulfate waste liquid by using sulfides causing no secondary contamination in the manganese sulfate waste liquid and the manganese sulfate is manufactured by performing evaporation concentration through heating, the manufacturing method is very environment-friendly and economical. Since the manganese recovering process improving the manufacturing yield of the manganese sulfate and the waste water treatment process capable of recycling the source materials and discharging waste water are integrated, the manufacturing method is very efficient and environment-friendly. The manufacturing method is applied to the recycling industry, and thus, it is possible to obtain effects of preventing environmental pollution and facilitating recycling the resources.

The invention relates to a method for preparing a nitrogen and sulfur synchronous doped nanometer titanium dioxide photocatalyst. One method adopting a doping source and simultaneously preparing the N and S modified TiO2 photocatalyst has not been reported. The method comprises the following steps of: preparing a titanium source solution and a doping source solution, weighting 80 parts by volume of anhydrous alcohol, adding 20 parts of tetrabutyl titanate into the anhydrous alcohol, and stirring to obtain the titanium source solution; adding 20 parts by volume of anhydrous alcohol, 20 parts of deionized water and 4 parts of 65%-68% nitric acid into a drop funnel to form a mixing solution, adding cystine accounting for 13% of the weight of the mixing solution into the mixing solution, and uniformly shaking to obtain the doping source solution; mixing the titanium source solution with the doping source solution to form wet gel, drying in a baking oven, and placing in a muffle furnace to roast to obtain the anatase type nanometer titanium dioxide photocatalyst with different spherical particle sizes. The preparation method is used for preparing a titanium dioxide photocatalyst.

The invention belongs to the technical field of fan-shaped sealing block preparation, and particularly relates to a preparation method of a fan-shaped sealing block of a dot matrix cooling structure. A laser selective melting quick molding technology is adopted for preparing the fan-shaped sealing block of the dot matrix structure, the dot matrix structure is composed of dot matrix units, each dot matrix unit is in a shape of a tetrahedron or pyramid or kagome construction, and a back plate of the fan-shaped sealing block is completely covered with the dot matrix structure. According to the preparation method, lasers serve as an energy source, powder bed selective quick molding equipment is used, appropriate fan-shaped sealing block molding direction and technological parameters are set, preparation of the fan-shaped sealing block of the dot matrix structure is further completed through a CAD model directly, a die is not needed, the alloy material using rate is high, the radiating performance of the obtained fan-shaped sealing block is excellent, the molding accuracy is good, and the heat insulation and cooling performance of the fan-shaped sealing block can be greatly improved.

The invention discloses a preparation method of milnacipran hydrochloride, which comprises the following steps: reducing a compound V disclosed as the formula in the specification in an inert solvent by using a reducer, and salifying. The existing compound I is subjected to five-step reaction to generate the compound V, and the compound V is reduced and salified to obtain the milnacipran hydrochloride. Every reaction step is simple to operate and mild in conditions; the obtained intermediate and end product have high yield and high purity; and thus, the invention provides an economical efficient preparation method of milnacipran hydrochloride, which is suitable for industrial production.

The invention belongs to the technical field of guide vane preparation, and particularly relates to a preparation method of a guide vane of a dot matrix cooling structure. A laser selective melting quick molding technology is adopted for preparing the guide vane of the dot matrix structure, the dot matrix structure is composed of dot matrix units, each dot matrix unit is composed of a rod piece, each dot matrix unit is in a shape of a tetrahedron or pyramid or kagome construction, and an inner cavity of a vane body of the guide vane is filled with the dot matrix structure. According to the preparation method, lasers serve as an energy source, powder bed selective quick molding equipment is used, appropriate guide vane molding direction and technological parameters are set, preparation of the guide device vane of the dot matrix structure is further completed through a CAD model directly, a die is not needed, the alloy material using rate is high, the radiating performance of the obtained guide device vane is excellent, the molding accuracy is good, the radiating performance of the guide vane can be greatly improved, and the cooling efficiency is improved.

The invention discloses a preparation method of N,P-codoped three-dimensional Co nanoflower, an obtained material and application of the material as oxygen to separate out an anode catalyst by electrolysis of water. The method comprises the step of carrying out reduction by taking alkaline metal inorganic salt as a template, taking inorganic cobalt salt as a cobalt source and taking hypophosphiteas a phosphorus source to obtain a N,P-codoped three-dimensional Co nanoflower catalyst. The N,P-codoped three-dimensional Co nanoflower prepared by the method has the advantages of ordered morphology, large surface area, high electrocatalytic activity and the like, is taken as the oxygen to separate out the anode catalyst, and has high catalytic activity and stability. The preparation method is simple and effective, and is universal.

The invention belongs to the technical field of organic synthesis route design and medicine and chemical engineering, particularly relates to a synthesis method of a sodium-glucose cotransporter 2(SGLT2) inhibitor, and more particularly relates to a preparation method of empagliflozin. The empagliflozin is synthesized by taking (3S)-3-[4-[(2-chloro-5-iodophenyl) methyl] phenoxy] tetrahydrofuran and glucono delta-lactone as initial raw materials through a series of substep reactions such as protection, addition, substitution, deprotection and reduction. In the synthesis steps disclosed by the invention, a staged target product does not need to be separated and purified after each step of reaction, and the target product is finally obtained by directly subjecting a high-purity reaction intermediate to subsequent steps. The preparation method is simple in process, simple and convenient to operate and good in industrial prospect.

The invention relates to a method for preparing a polymer fluorescent nano particle, which belongs to the field of materials. The invention solves the problems that the traditional polymer fluorescent particle preparation process is complicated and the traditional polymer fluorescent sphere is micron or submicron grade in size and limited in application. The method comprises the following steps of: 1. refluxing by heating for preparing a seleno-sodium sulfate solution; 2. after mixing a seleno-sodium sulfate solution, a cadmium acetate solution, a sodium hydroxide solution, oleic acid and ethanol according to a certain proportion, carrying out heat reaction for preparing a cadmium selenide quantum dot; 3. extracting the quantum dot through styrene and preparing styrene even suspension; 4. carrying out emulsifying polymerization on the styrene suspension and reacting for preparing polystyrene nano fluorescent particle emulsion; and 5. adding salt into the styrene nano fluorescent particle emulsion, centrifuging, dispersing and storing to obtain the polystyrene fluorescent nano particle. The prepared polystyrene fluorescent nano particle can be applied to the fields of biomarkers, optical materials, cell imaging, and the like.