64results about How to "Industrialized mass production" patented technology

The invention belongs to the technical fields of spices and in particular relates to a synthetic process of ethyl maltol. The process comprises a chlorination reaction step, a hydrolysis rearrangement step and a sublimating and purifying step, wherein the chlorination reaction is realized by reacting alpha-ethylfuran methanol with chlorine at the flow ratio of (1.8 to 2.3L):1kg to generate a hydroxy chlorovinylketone intermediate; the hydrolysis rearrangement means that the hydroxy chlorovinylketone intermediate is hydrolyzed at the temperature of 90 to 105DEG C for 3 to 4.5 hours to obtain an ethyl maltol coarse crystal; the coarse crystal is sublimated and purified under the conditions that the temperature is 200 to 225DEG C and the pressure is 0.080 to 0.090MPa to obtain an ethyl maltol product. The synthetic process disclosed by the invention is detailed and specific in operation and is stable; the chlorinating efficiency is improved and the generation of foamed yellow crystals is controlled; meanwhile, sublimating and purifying conditions are controlled, thereby effectively improving the yield and the purity of the ethyl maltol.

The invention discloses blend oil rich in alpha-linolenic acid and capable of protecting the cardiovascular system. The blend oil is blended by at least five of linseed oil, eucommia seed oil, peony seed oil, purple perilla seed oil, walnut oil, tomato seed oil, safflower seed oil, acer truncatum seed oil and black sesame oil. The blend oil has the advantages that the content of the alpha-linolenic acid reaches 20-48%, the alpha-linolenic acid can convert into EPA and DHA needed by human bodies, the total content of saturated fatty acid is lower than 10%, and various fatty acids are coordinated in proportion and conform to the recommended amount of dietary nutrition guidelines; the raw material oil is obtained through cold pressing and physical refining, no chemically-synthesized antioxidant is added, and accordingly the blend oil is rich in active components capable of protecting the cardiovascular system and has an evident cardiovascular system protecting function.

The invention discloses a jujube polysaccharide extracting method, which comprises the following steps: first, disintegrating the jujube; extracting juice to generate jujube residual; leaching the extractor and residual in the cold water; condensing the extractor to deposit and recycle the polysaccharide. The invention saves energy, which simplifies extracting technology and utility rate.

The invention provides a nanoscale compound antibacterial agent and a preparation method and application thereof, which relate to the technical field of antibacterial agents. The nanoscale compound antibacterial agent is mainly prepared from nanosilver, graphene, protein, phospholipid, polysaccharide, cholesterol, vitamin and other raw materials, functional substances, such as the vitamin, are wrapped by a lipidosome formed by the protein, the phospholipid, the cholesterol and other materials, moreover, the nanosilver, the graphene and other materials are loaded inside or on the surface of thelipidosome after being compounded, and thereby the nanoscale compound antibacterial agent which is highly similar to a cellular structure is produced. The speed by which the compound antibacterial agent gets into microbial cells is high, and the compound antibacterial agent can gather around a focus to generate a high-concentration drug effect; because the surface of the compound antibacterial agent is positively charged, the compound antibacterial agent can selectively adsorb, wrap, shield and kill pathogenic bacteria and viruses, the surfaces of pathogenic bacteria and viruses which are negatively charged, thus having a high antibacterial effect. The invention further provides the preparation method of the nanoscale compound antibacterial agent, and the method can realize the uniform mixing of all the materials, thus being favorable for the increase of the stability of the nanoscale compound antibacterial agent.

The invention provides a ceramic nanofiber and a preparing method and device thereof. The method comprises the steps of providing a precursor solution with spinnability, wherein the precursor solution includes a ceramic precursor, a polymer and a solvent; utilizing airflow to stretch the precursor solution into the nanofiber, and using a collector to collect the nanofiber; conducting sintering on the nanofiber obtained from collection to obtain the ceramic nanofiber. According to the ceramic nanofiber and the preparing method and device thereof, ultra-light, high temperature resistant and cheap ceramic nanofiber can be prepared massively, and the preparing method is fast, efficient and energy conserving, and has potential of industrialized mass production.

The invention provides anode materials for a lithium ion battery and preparation methods thereof. An anode material for the lithium ion battery is equipped with a core shell structure. A core of the core shell is formed by nano-silicon. A material for forming an outer shell of the core shell structure comprises graphene. Expansion space is set between the core and the outer shell. According to theanode material for the lithium ion battery provided by the invention, the expansion space is reserved for the nano-silicon core in the core shell structure, so Si is enabled to expand and retract fully in a charge / discharge process. In this way, outer shell fracture does not occur in anode material particles, si circulation service life of the anode material is extended. Conductivity is improvedthrough utilization of the graphene in the outer shell, so capacity of the anode material is relatively high.

The invention discloses a radiation protective film material. The radiation protective film material comprises a bottom film, and an electromagnetic shielding coating material is coated on the bottom film, wherein the electromagnetic shielding coating material is a polyaniline material. The invention also discloses radiation protective glasses, display screens, radiation protective clothing, and the like prepared by utilizing the radiation protective film material. The radiation protective film material simultaneously has electric conduction, magnetic permeance, wave absorbing performance and excellent radiation protection performance. Meanwhile, the radiation protective film material has good transparency and wide application, not only can be applied to the radiation protective glasses, computer display screens and television display screens, but also can be applied to mobile phone display screens, radiation protective clothing, and the like and has greater industrial values.

The invention discloses hemp leaf soothing and repairing essence, and belongs to the field of cosmetics. The product comprises the following components: a penetration enhancer, a whitening agent, a soothing agent, an allergy-relieving repairing agent and a skin conditioner, wherein the allergy-relieving repairing agent comprises a hemp leaf extract, carboxymethyl chitosan, a chia seed fermentationrepairing factor and an oat kernel extract. Carboxymethyl chitosan, the hemp leaf extract, the chia seed fermentation repair factor and the oat kernel extract are used as the allergy-relieving repairagent, so that the allergy-relieving repair agent has a synergistic effect and can achieve an instant and long-acting skin allergy-relieving / soothing effect in cooperation with the soothing agent inthe formula; in addition, through mutual cooperation with the skin conditioner, the penetration enhancer and the whitening agent, the cannabis sativa leaf soothing and repairing essence has excellentskin repairing performance, acne removing performance and whitening performance at the same time. The invention also discloses a preparation method of the cannabis sativa leaf soothing and repairing essence, and the method is simple to operate and can be industrially produced on a large scale.

The invention discloses a synthesis method of 3-(benzyloxy)-4-oxo-4H-pyran-2-carboxylic acid. The synthesis method takes furfuryl alcohol as a starting raw material and four-step reaction including rearrangement, addition, hydroxyl protection and oxidization is carried out; the total mol yield of a synthesis route is greater than 32 percent; the synthesis method has the characteristics of relatively moderate reaction conditions and the like, and the yield and purity of the 3-(benzyloxy)-4-oxo-4H-pyran-2-carboxylic acid are remarkably improved; meanwhile, the synthesis method has the advantagesof detailed technological operation steps, specific parameters, controllable conditions and stable technology, and can realize industrial large-batch production.

The invention discloses a non-vacuum-state rolled titanium steel composite plate and a preparation method thereof. The titanium steel composite plate comprises a carbon steel layer, a transition layerand a titanium layer; the ability of compounding the transition layer with the carbon steel layer and the titanium layer is stronger than the ability of directly compounding the carbon steel layer with the titanium layer; and the transition layer can prevent part of elements in the carbon steel layer from diffusing to the titanium layer to form a brittle phase. According to the preparation methodof the titanium steel composite plate, the titanium steel composite plate is subjected to rolling compounding in a non-vacuum state by adopting an inert gas protection method, the reliability is high, the environmental requirement is low, and the non-vacuum-state rolled titanium steel composite plate is efficient and environment-friendly.

The invention relates to a 3D printing high-compactness titanium-titanium boride composite material and a preparation method thereof. 45-84 wt% of titanium powder and 16-55 wt% of titanium diboride powder are mixed to obtain raw material powder; and titanium and titanium diboride powder is obtained through burdening and mixing according to a mass ratio of the raw material powder to agate balls of1: (1-5). The titanium and titanium diboride powder is manually paved on a substrate of 3D printing equipment according to each-layer powder paving thickness; the manual powder pavement and the manualcontrol of laser scanning of 3-5 layers are firstly performed; and then, the each-layer automatic powder pavement and the each-layer automatic laser scanning are performed until targets are printed to obtain the titanium-titanium boride composite material. The 3D printing high-compactness titanium-titanium boride composite material is obtained through polishing by a sand blasting machine, surfaceimpurity removal, drying and heat treatment. The process is simple, and needs no mold, no high-temperature and high-pressure preparation condition and no subsequent material reducing treatment; and the prepared product is high in purity, compactness and size precision and excellent in mechanical performance.

The invention provides a method of preparing lithium iron phosphate material and lithium iron phosphate power prepared by the method. The method of preparing lithium iron phosphate material mainly comprises the steps of raw material selection, slurry preparation, slurry grinding, pelleting, calcining and the like, and also includes teh step of size selection based on needs. Compared with other conventional method, the method of the invention has teh advantages of simple process, low manufacturing cost and industrial large-scale production. In addition, the invention provides lithium iron phosphate power prepared by the above method, and the power can serve as anode material for lithium ion rechargeable batteries.

The invention relates to a method for modifiying an aluminium alloy bipolar plate used for a proton exchange membrane fuel cell by a boron nitride nano sheet. The method comprises the following steps: 1) placing a pre-treated aluminium alloy matrix in an aqueous solution, performing anodization; 2) taking a NMP solution of PVDF, adding the BN nano sheet, uniformly mixing the materials to obtain ternary mixed treatment fluid; and 3) coating the surface of the aluminium alloy matrix after anodization with the ternary mixed treatment fluid obtained in the step 2), drying the material, and calcining the product for completing the modification. Compared with the prior art, the corrosion resistant performance of the aluminium alloy bipolar plate in a PEMFC simulation solution can be greatly increased, the cost is low, the operation is simple, and the industrial batch production can be realized.

The invention provides a deoxidization corrosion inhibitor as well as a preparation method and application thereof and relates to the technical field of water treatment. The deoxidization corrosion inhibitor is mainly prepared from raw materials such as a pretreatment filming agent, a deoxidizing agent, an inhibitor, a pH regulator and water, wherein the deoxidizing agent comprises erythorbic acidand / or sodium erythorbate; and the inhibitor comprises sodium epoxysuccinate, sodium hexametaphosphate and polyaspartic acid. Due to the synergistic effect of all the raw materials, the obtained deoxidization corrosion inhibitor is capable of rapidly removing dissolved oxygen in boiler water, solving the corrosion problem of a boiler, a pipeline and a heat exchanger, keeping the oxygen content ofthe boiler water within a natural standard range after being used, reducing the hardness of the boiler water and reducing the formation of water scales, and meanwhile, the deoxidization corrosion inhibitor is safe, nontoxic, incapable of increasing environment pollution and capable of adapting to various requirements for water quality. In addition, the invention further provides a preparation method of the deoxidization corrosion inhibitor, and the preparation method is simple, easy and suitable for large-scale industrial production.

The invention discloses a trepanning orientation measurement device and method fixed on a drilling machine. The drilling machine comprises a posture measurement module and a laser indication module; the posture measurement module is installed and fixed on a drilling machine guide rail; the guide rail is parallel to a drill pipe, so that measurement on the current inclination angle and azimuth angle of the drilling machine can be achieved; the laser indication module is installed and fixed at the center position of a drilling machine clamper. According to the device and method provided by the invention, the problems that in the prior art, a trepanning orientation device cannot be installed on the drilling machine to achieve accurate measurement of the full space and a trepanning orientationindication is lacked can be solved, the measurement error of the trepanning orientation device caused by surrounding vibration can be effectively reduced, and the measurement accuracy can be improved.

The invention provides a batch preparation method for a titanium-based air suction element with the high porosity. The preparation method comprises the following steps that under the condition of argon protection, titanium powder and a mixture of molybdenum powder, zirconium ferrovanadium powder, zirconium aluminum powder and zirconium nickel powder are evenly mixed, and a titanium-based raw material is obtained; under inert gas protection, the titanium-based raw material and ammonium bicarbonate are evenly mixed, an organic binder bond is added, and an injecting feedstock is formed; the feedstock is deposited on modified metal wires, subjected to forming through isostatic cool pressing and taken out after pressure relief and demoulding, and a blank is formed; under a vacuum state, the blank is stored in trichloro ethylene to be subjected to chemical degreasing treatment and then taken out for cooling, and a chemical degreasing blank is obtained; and the chemical degreasing blank is subjected to high-temperature sintering in a vacuum sintering furnace, cooled and taken out of the vacuum sintering furnace, and then the high-porosity titanium-based air suction element with the porosity being higher than 50% is obtained. According to the titanium-based air suction element with the high porosity, a preparation technique is simple and easy to operate, and the air suction element is high in porosity, good in manipulative performance and excellent in air suction performance.

The invention belongs to the technical field of graphene materials and particularly relates to special modified graphene for polymerization of vinyl chloride. The special modified graphene for polymerization of vinyl chloride comprises graphene powder and multiple surface modifiers, wherein the weight ratio of the surface modifiers is 0.5-5wt% and the surface and edges of graphene are uniformly coated with the surface modifiers. The preparation method is simple, efficient and environment-friendly, industrialized mass production can be achieved, the obtained product is particularly suitable for a vinyl chloride suspension polymerization system, the properties including thermal property, mechanical property and electrical property of polyvinyl chloride (PVC) can be significantly improved and thus the market application range of PVC is expanded.

The invention discloses plant anti-hair loss hair-growing shampoo. The plant anti-hair loss hair-growing shampoo comprises the following raw materials in parts by weight: 55 to 65 parts of water, 8 to12 parts of sodium cocoyl aminopropionate, 6 to 10 parts of sodium cocoyl sarcosine, 3 to 5 parts of cocamidopropyl betaine, 1 to 3 parts of cocamidopropyl DEA, 0.01 to 0.05 part of EDTA-disodium, 0.2 to 0.3 part of sodium isostearoyl lactylate, 0.2 to 0.4 part of cationic guar gum, 0.1 to 0.3 part of a cationic conditioner and 13 to 15 parts of a plant extracting solution, wherein the plant extracting solution is prepared from the following raw materials: glossy privet fruit, astragalus membranaceus, holly, ginger, polygonum multiflorum, saponin, cacumen biotae, radix sophorae flavescentis,black bean powder and sasangua cake powder. The plant anti-hair loss hair-growing shampoo can achieve the anti-hair-loss and hair-growing effects, can also be matched with other components to inhibitpropagation of microorganisms, can inhibit generation of dandruff during use, and is not prone to deterioration and pollution at the same time. The invention also provides a preparation method of theplant anti-hair loss and hair-growing shampoo.

The invention discloses a sunlight greenhouse adopting a pluggable heat insulation wall body. A north wall body, an east wall body, and a west wall body are formed by alternatively assembling a first structural wall body module and a second structural wall body module, and a top layer module, wherein the first structural wall body module is a rectangular integrated structure of which top face is provided with a plug head and a bottom part is provided with a plug groove; the second structural wall body module is an integrated structure formed by two crossly symmetrical first structural wall body modules and connected side faces; the top layer module is provided with two structures respectively including a rectangular structure of which bottom face is provided with a plug groove and a rectangular structure of which bottom face is provided with two plug grooves; every module is poured and shaped by adopting a five-layered heat insulation structure; in the five-layered structure, the middle layer is a framework layer; both sides of the framework are fireproof heat insulation layers; two outsides of the fireproof heat insulation layer are respectively coated with solar selective absorbing coating and heat insulation coating. The sunlight greenhouse has the advantages that the heat insulation effect is good, the sunlight greenhouse can be plugged and pulled instantly, and wall height and length can be changed according to production demand.

The invention belongs to the technical fields of spices and in particular relates to a synthetic process of ethyl maltol. The process comprises a chlorination reaction step, a hydrolysis rearrangement step and a sublimating and purifying step, wherein the chlorination reaction is realized by reacting alpha-ethylfuran methanol with chlorine at the flow ratio of (1.8 to 2.3L):1kg to generate a hydroxy chlorovinylketone intermediate; the hydrolysis rearrangement means that the hydroxy chlorovinylketone intermediate is hydrolyzed at the temperature of 90 to 105DEG C for 3 to 4.5 hours to obtain an ethyl maltol coarse crystal; the coarse crystal is sublimated and purified under the conditions that the temperature is 200 to 225DEG C and the pressure is 0.080 to 0.090MPa to obtain an ethyl maltol product. The synthetic process disclosed by the invention is detailed and specific in operation and is stable; the chlorinating efficiency is improved and the generation of foamed yellow crystals is controlled; meanwhile, sublimating and purifying conditions are controlled, thereby effectively improving the yield and the purity of the ethyl maltol.

The invention relates to a high-temperature-resistant abrasion-resistant remelting nickel-based composite coating for a fire grate segment of a garbage incinerator. The high-temperature-resistant abrasion-resistant remelting nickel-based composite coating is a remelting nickel-based self-fluxing alloy-based aluminum oxide particle reinforced composite coating. The coating is cladded on the surfaceof the fire grate segment and is metallurgically bonded with the surface of a fire grate segment base body. The invention also relates to the preparation method of the coating. The method comprises the following steps: firstly, pressing and coating high-heat-release nano thermite on the surface of the fire grate segment, then spraying a nickel-based self-fluxing alloy material, preparing the nickel-based self-fluxing alloy-based composite coating on the surface of the fire grate segment through a self-propagating reaction caused by spraying, enabling a spraying coating to be in metallurgicalbonding with a thermite reaction product and the base body, finally, remelting a self-fluxing alloy layer sprayed on the surface through an induction coil or oxyacetylene flames, and obtaining the compact abrasion-resistant coating. The coating prepared through the method is compact in structure, smooth in surface, high in interface bonding strength with the base body, good in high-temperature abrasion resistance, suitable for curved surface automatic surfacing and capable of achieving industrial batch production.

The invention discloses a ginseng liquid capable of supplying water, and a preparation method thereof. The ginseng liquid capable of supplying water is prepared from water, glycerin, propylene glycol,silk extract product, allantoin, a thickening agent, panthenol, dipotassium glycyrrhizinate, sodium hyaluronate, herba portulacae extract product, ginseng extract product, sargassum pallidum extractproduct, a pH conditioning agent, an antiseptic, and a solubilizer. The ginseng liquid is capable of supplying skin with moisture effectively, reducing melanin content, maintaining skin to be moisture, and whitening and nourishing skin.

A method for simultaneously extracting jujube polysaccharide and jujube flavone in sequence from jujube is that most part of monosaccharide and disaccharide in jujube is removed by the yeast fermentation method and the jujube polysaccharide and jujube flavone are extracted respectively from fermentation liquid and the fermented jujube residue. Jujube powders and water are extracted according to acertain proportion, are added with activated yeast to carry out the aerobic fermentation to complete the fermentation when the residual sugar content of reducing sugar is 2 to 5 percent (weight); filtrate and filtrate residue are obtained by filtering; the filtrate is concentrated with ethanol precipitation, and is filtered, deproteinized and dried to obtain the jujube polysaccharide. The filter residue is refluxed and extracted by ethanol solution, the extract liquid is reduced in pressure and concentrated, extracted by petroleum ether, removed the petroleum ether and absorbed by a macroporous resin column; eluent is reduced in pressure, concentrated and carried out the vacuum freeze drying to obtain the jujube flavone. The method has the advantages of reduction of the interference on extracting the jujube polysaccharide and the jujube flavone, no pollution, energy saving, synchronous extraction of the jujube polysaccharide and the jujube flavone, low cost of products by one process,and can be volume-produced by industrialization.

The invention relates to an article for daily use, in particular to multifunctional chopsticks for Chinese and western foods. Each chopstick comprises a head part, a connecting part and a tail part which are connected from front to back in sequence, wherein the head part becomes thinner from the rear end to the front end; the front end of the head part is provided with an inverted V-shaped groove so as to lead the front end to form two needle-shaped bosses; the connecting part is formed by connecting a front half section and a rear half section, at least one side of the width direction of the front half section is provided with an edge and the shape of the section of the rear section is square; the tail end becomes thinner front the front end thereof to the rear end, and one side of the width direction of the tail part is provided with a hook-shaped groove; the two sides of the width direction of the front half section of the connecting part are respectively provided with one cutting edge; and the length of the head part is 1 / 8 of that of the multifunctional chopstick, the length of the connecting part is 6 / 8 of that of the multifunctional chopstick and length of the tail part is 1 / 8 of that of the multifunctional chopstick. The multifunctional chopsticks are made of iron materials and stainless steel materials, are all suitable for being used when eating Chinese and western foods and have convenient use.

The invention discloses a preparation method of high-purity mannan oligosaccharide. The preparation method comprises the steps of 1, producing a mannan oligosaccharide mixture through enzymolysis conversion; 2, carrying out centrifugal separation: separating enzymatic hydrolysate through a centrifugal machine; 3, carrying out ceramic membrane filtration: filtering centrifugate through a ceramic membrane group as precision separation to remove protein, starch and polysaccharide substances; 4, carrying out ion exchange refining: desalting, decoloring and deodorizing filtrate through a mannan oligosaccharide ceramic membrane; 5, carrying out 2000 molecular weight ultrafiltration: ultrafiltering ion exchange refining liquid through a polyether sulfone-polyamide composite membrane with interception as Dalton to obtain a polymerization degree; 6, carrying out nanofiltration: filtering sugar liquid through a ceramic membrane, ion exchange refining and an ultrafiltration membrane; and 7, carrying out spray drying: preheating a nano-filtered concentrated solution, and drying in a spray drying tower. The dried product contains more than 95% of mannan oligosaccharide, and has an obvious function of multiplying bifidobacterium; meanwhile, the product, as a most promising substitute, can reduce harmful bacteria.

The invention discloses a potato dedicated castor oil group pesticide. An effective bactericidal agent is composed of castor oil, tomatine, solanine and aminoglycoside, and a solvent carrier is composed of an emulsifier and a solvent; the drug ratio of the castor oil, tomatine, solanine and aminoglycoside of 6:2:1:1, and the drug ratio of the emulsifier to the solvent is 3:7; the ratio of the effective bactericidal agent to the solvent carrier is 2:7, and the rest component of the pesticide is industrial ethanol. With the castor oil as the main raw material and the carrier, the drug sources are rich, are low in cost and easy to obtain, and residues and hazards are not generated; the potato dedicated castor oil group pesticide has the advantages of rich raw material sources, low price, safety, broad spectrum, high efficiency, low toxicity, low residues, and no pollution; and the potato dedicated castor oil group pesticide has good prevention and treatment effect, is nuisanceless, low in toxicity and simple in process, allows pests not to easily generate resistance, and can be used for industrialized batch production.

The invention belongs to the technical field of medicine preparation, and discloses a preparation method of (R)-3-hydroxybutyrate. The preparation method comprises the following steps: adding an organic solvent into poly (R)-3-hydroxybutyric acid, and heating and refluxing; then adding alkali liquor and / or lipase for reaction, adding acid to adjust pH after the reaction is finished, and then carrying out evaporation concentration, impurity removal and drying to obtain the product. The preparation method provided by the invention comprises the following steps: firstly, adding an organic solvent to dissolve and permeate poly (R)-3-hydroxybutyric acid so as to destroy the crystal structure of poly (R)-3-hydroxybutyric acid and reduce the crystallinity of poly (R)-3-hydroxybutyric acid, and then preparing (R)-3-hydroxybutyrate in an alkaline hydrolysis and / or enzymolysis manner. The production operation is simple, and the requirements on production equipment and environment are low; the production period is short, the production efficiency is high, the cost is low, and industrial mass production can be realized; and the prepared (R)-3-hydroxybutyrate has high purity and high yield, and the quality stability of different batches of products is high.

The invention discloses a prefabricated shear wall vertical joint connecting structure and a construction method thereof, and relates to the technical field of prefabricated concrete shear wall vertical joint connecting structures in civil construction. The prefabricated shear wall vertical joint connecting structure mainly structurally comprises shear walls, embedded profile steel and connecting pieces. The embedded profile steel is partially embedded in the shear walls, the embedded profile steel on the two shear walls is in butt joint through a rabbet, and the butt joint position is covered with the connecting pieces. The invention further provides a construction method of the prefabricated shear wall adopting the vertical joint connecting structure. The prefabricated shear wall vertical joint connecting structure is good in shock resistance, easy to install and convenient to maintain.

The invention discloses a composition for inhibiting benign prostatic hyperplasia, which belongs to the field of healthy food. The composition comprises the following components: mixed tocopherol, lycopene, phytosterol ester and turmeric. The content of curcumin in the turmeric is 40 to 60 percent. The turmeric, lycopene, mixed tocopherol and phytosterol ester are compounded, through the synergistic effect of the components, benign prostatic hyperplasia can be effectively inhibited, and the effect is better than that of single use. In addition, the composition for inhibiting benign prostatic hyperplasia is high in safety and free of toxic and side effects. The invention further provides a preparation method of the composition for inhibiting benign prostatic hyperplasia, and the preparation method is simple in preparation process and can be used for industrial mass production. The invention also provides application of the composition for inhibiting benign prostatic hyperplasia in preparation of a product healthy food for inhibiting benign prostatic hyperplasia.

The invention relates to a crucible for pulling monocrystalline silicon and a preparation method therefor. The crucible consists of a C / SiC crucible blank and various coatings, wherein the C / SiC crucible blank is prepared by manufacturing a green body by methods such as an SMC and then carrying out heat treatment; and the various coatings are prepared by an electric arc method. The crucible prepared by the method is comprehensively better than a quartz crucible prepared by the electric arc method.