99results about How to "Pure ingredients" patented technology

The present invention relates to good-dispersity SnO2/Ag nanometer composite powder and a preparation method thereof. The preparation method comprises: adopting soluble inorganic salts SnCl2.2H2O and AgNO3 as raw materials, respectively preparing solutions with a certain concentration, mixing according to a certain ratio to obtain milky white precipitate, adding ammonia water to the precipitate to adjust the pH value so as to obtain brown precipitate, and finally carrying out washing, drying and sintering on the obtained precipitate to obtain the SnO2/Ag nanometer composite powder. According to the present invention, the diffused distribution of the nano-SnO2 in the composite powder is achieved through the liquid phase precipitation method, such that the problem of easy agglomeration of the nanoparticle in the conventional powder metallurgy method is avoided; and the method of the present invention has characteristics of simple process, energy saving, time saving, and broad application prospects, and is suitable for industrial production and promotion.

The invention relates to a method for preparing nickel and nickel alloy one-dimensional superstructure nanometer functional materials by adopting a hydrogen separation template method, which mainly comprises the following steps of adding an additive, metal salt of a first constituent element and a complexing agent in an aqueous solution containing a buffering agent with specific pH in sequence toform a solution, mixing the solution uniformly, and then adding one of a sulfur source, a phosphor source and a tin source commonly deposited in a second constitute element in the solution. The obtained mixture is uniformly mixed at certain temperature; a pH value is adjusted to stabilize an electrolyte; hydrogen is separated out on the surface of a nickel matrix quantitatively, directionally anduniformly through controlling current density by adopting a direct current or pulse electrolytic deposition method; and finally, lots of fine, dense and continuous air bubbles are formed in the mixedsolution. By adopting the method, as an actual template does not need to be used when an alloy nanometer wire is prepared, the problem of removing the template is not involved. By using the method, the preparation reaction period is short, the operation is simple and convenient, the conditions are easy to control, and the production efficiency is high. Simultaneously, the method further has the advantages that the cost is low, the maneuverability is strong, the yield is high, the mass production can be realized and the like, and has obvious practical value.

The invention discloses a method for extracting tea essential oil from oolong tea stalks. The method comprises the following steps of: putting the oolong tea stalks serving as raw materials into a tea stalk distillation device, adding distilled water, and distilling; measuring petroleum ether, adding into a petroleum ether distillation device, and distilling; connecting the tea stalk distillation device and the petroleum ether distillation device through a glass guide pipe, fully mixing volatile gas distilled from the tea stalks and petroleum ether steam in a gas storage bag, introducing mixed steam into a condensation pipe, condensing to form oil-water mixed liquid, and refluxing the mixed liquid to a separating funnel; refluxing a water phase and an oil phase in the separating funnel to a first flask and a second flask respectively, so that the circular extraction process is finished once; repeating the process to fully extract the essential oil from the tea stalks; and taking the second flask with the petroleum ether out, concentrating a solution in the second flask, and collecting to obtain tea essential oil paste. By the method, the extraction cost of the tea essential oil can be reduced, and the economic benefit of tea processing is improved.

The invention relates to an artemisia leaf nutritional chewable tablet and a preparation method thereof. The artemisia leaf nutritional chewable tablet comprises the following raw materials in parts by weight: 2-6 parts of artemisia leaf powder, 1-2 parts of oligoisomaltose and 1-3 parts of nutrient substance, wherein the nutrient substance refers to skim milk powder or banana powder or hawthorn powder or orange powder. A preparation process comprises the following steps of: selecting materials, preparing soft materials, pelletizing, tableting and sterilizing. The artemisia leaf nutritional chewable tablet is rich in bioflavonoid and oligoisomaltose, has multiple health-care effects of eliminating cold to stop pain, warming meridian to stop bleeding, improving intestinal balance and the like, has a unique flavor, is convenient to eat, easy to carry and particularly suitable for the aged, women and sub-healthy people, and is a novel health-care food.

The invention relates to a preparation method of a nano-zinc oxide-doped hydroxyapatite porous ceramic and belongs to the technical field of preparation of biomedical materials. The preparation methodtakes nano-zinc powder and hydroxyapatite powder as the raw materials and comprises weighing out ZnO and HA (hydroxyapatite) at a weight ratio of 1-7%:99%-93%, performing ball milling to obtain composite powder, uniformly mixing and pressing the composite powder and a pore forming agent of ammonium bicarbonate to obtain a blank, and then preparing the nano-zinc oxide-doped hydroxyapatite porous ceramic through a spark plasma sintering method. The prepared nano-zinc oxide-doped hydroxyapatite porous ceramic is pure in composition and achieves a controllable porosity of 40-70%, and added nano-zinc oxide can improve the osteogenic induction capacity of the nano-zinc oxide-doped hydroxyapatite porous ceramic and further improve the bone-forming capacity of parts around an implanted part; by controlling the porosity of the nano-zinc oxide-doped hydroxyapatite porous ceramic, the preparation method can prepare biological ceramics which meet different requirements and are applied to bone scaffold, filling and repair materials.

The invention provides a method for preparing copper nanowires in a microchannel in situ by virtue of insoluble liquid-liquid two-phase interface reaction. The method comprises the following steps: preparing an oil phase solution and an aqueous phase solution which are mutually insoluble, wherein one phase contains copper salt and the other phase contains a reducing agent; treating a microchannel wall surface so that a reaction resultant can easily grow on and adhere to the microchannel wall surface; controlling flow parameters of the two phases so as to enable the two phases to form a low-speed parallel flow in the microchannel; controlling the position of a two-phase liquid-liquid interface in the microchannel; and keeping the stability of the position and the form of the interface, performing chemical reaction at the interface to generate copper, and depositing on the channel wall surface at the interface position to form the copper nanowires. The obtained copper nanowires are uniform in transverse size, and are as long as the channel in which the parallel flow is formed; and the positions of the generated copper nanowires in the microchannel are determined by the position of the two-phase interface and can be flexibly adjusted. By the preparation method, a graphical micro-nano structure can be directly prepared in the microchannel; and the preparation method is low in temperature, simple, good in compatibility, low in cost and high in practicality.

The invention provides a method for preparing superfine copper nano particles by utilizing immiscible liquid-liquid two-phase interface reaction. The method comprises the following steps of firstly, dissolving a copper salt into a non-polar solvent to prepare a copper-containing source solution or dissolving a copper salt into a non-polar solvent and then emulsifying witha polar solvent to prepare a copper-containing source solution, and dissolving a reducing agent into the polar solvent to prepare a reducing solution; forming an immiscible two-phase system by the reducing solution and the copper-containing source solution, thereby obtaining a stable liquid-liquid interface; and at certain temperature, reacting at the liquid-liquid interface to generate the superfine copper nano particles. The method can be used for preparing the superfine copper nano particles with particle diameters smaller than 10 nanometers, and the superfine copper nano particles have fewer impurities, pure components, good crystallization quality, and uniform sizes and morphology, can be stably dispersed into the immiscible two-phase system obtained by reaction without surface modifying and coating, and can standfor a long time in normal-temperature air without being oxidized. The method is simple, is low in energy consumption, is low in cost, is easy to control, and is high in practicability, and can be used for continuously preparing and gathering the superfine copper nano particles. Preferably, water and oleic acid are adopted as a solvent, so that the preparation method is enabled to be non-toxic and environmentally-friendly.

The present invention prepares succinic anhydride with material including pure benzene, cis-butenedioic anhydride, catalyst and hydrogen. The preparing process features the flake product with fast dissolving, and less caking and crystallizing. The present invention has the advantages of less material consumption, simple preparing process, low cost, high product purity and bright color, and the product may be used in producing pesticide, plant growth regulator and medicines and as brightener for paper and paint production.

The invention relates to a preparation method of an isotropic ceramic nanowire preform, which comprises the following steps: loading a polymer precursor on activated carbon powder to form a mixture, pressing the mixture into a green body template; cracking the polymer precursor on the template at a certain temperature to grow a large number of nanowires which are crossed and lapped with one another; then performing oxidation to remove the activated carbon to prepare the isotropic ceramic nanowire preform material with the interconnected three-dimensional network structure. The nanowires in theisotropic ceramic nanowire preform prepared by the method are pure in component, uniform in structure, controllable in size and adjustable in volume fraction. The method has the advantages of simpleprocess steps, short period, relatively low cost, good stability and good repeatability. Meanwhile, the ceramic nanowire preform has the functions of heat insulation, light weight, electricity, opticsand the like, requirement for multifunctional integration is expected to be met, and the application field of ceramic matrix composite materials is expanded.

The invention discloses a cubic-phase Ca2Si thermoelectric material and a preparation method thereof. The method comprises the following steps that 1, Ca powder and Si power are mixed to be uniform in an Ar protective atmosphere, and a mixture is obtained; 2, the mixture, a grinding ball, a stainless steel ball grinding tank and electronic scales are put into a glove box inflated with an atmosphere of Ar, after accurate weighing is conducted in the glove box, the mixture is put into the ball grinding tank, the ball grinding tank is well sealed, oxygen is prevented from entering the ball grinding tank, and then the ball grinding tank is taken out of the glove box; 3, the well-prepared ball grinding tank in the second step is put into a ball grinder, ball grinding is conducted at a certain rotating speed, and the powder reacts completely; 4, the well reacted powder in the third step is taken out and put into a stainless steel mold with a required specification, vacuum-sintering tabletting is conducted by means of a vacuum plasma sintering mode, and the cubic-phase Ca2Si flake or blocky thermoelectric material is obtained. The cubic-phase Ca2Si thermoelectric material and the preparation method thereof have the advantages that the technology is simple, operation is easy, the cost is low, and the obtained cubic-phase Ca2Si flake or blocky material is high in product purity and close in integration and has a good industrialization prospect.

The invention provides a precise alloy casting for a mechanical arm and a casting method of the precise alloy casting, and relates to the technical field of precise alloy materials. The precise alloy casting comprises chemical elements including, by mass percent, 1.1%-1.6% of C, 1.8%-3.5% of Mn, 1.52%-2.83% of Al, 0.11%-0.2% of Cr, 0.08%-0.16% of Ni, 0.12%-0.19% of Co, 0.23%-0.37% of W, 0.22%-0.43% of Cu, 0.12%-0.43% of Nb, 0.12%-0.20% of Fe, smaller than or equal to 0.04% of Re, smaller than or equal to 0.04% of S, smaller than or equal to 0.04% of P and the balance Ti. According to the precise alloy casting, rare metal elements are adopted, many external cores are formed when the casting is cast, grains are refined or the crystal habit is changed, and the precise alloy casting is formed; and accordingly, the mechanical performance of the casting is improved, the surface smoothness of the casting is high, internal defects of the casting are few, components are pure, and performance is stable.

The invention relates to the field of bioceramic materials, in particular to a biphasic calcium phosphate porous bioceramic bone scaffold material which is prepared from salmon spine as a raw material, is composed of main ingredients hydroxyapatite and beta-tricalcium phosphate , has high porosity, reserves a natural three-dimensional pore structure, has a particle size of 500-1000 [mu]m, and is prepared through steps of washing and drying, high temperature calcination, grinding, sieving and sterilization. The biphasic calcium phosphate porous bioceramic bone scaffold material is rich in sources of raw materials and low in preparation cost, high purity biphasic calcium phosphate ceramic can be prepared without artificial addition of compounds, and the content of hydroxyapatite and beta-tricalcium phosphate can be changed by controlling the calcination temperature in the preparation process, and the biphasic calcium phosphate porous bioceramic bone scaffold material contains a small amount of carbonated hydroxyapatite and various trace elements such as magnesium, potassium and strontium, with the content close to the content in the human body. The calcium phosphate ceramic prepared through the method can serve as a good bone scaffold material to be applied to clinical bone defect repair.