293results about How to "Can be produced industrially" patented technology

The invention relates to a method for continuously generating fine gutta-percha through digestion-reextraction. The method comprises the steps of: firstly, pre-treating folium cortex eucommiae including drying, crashing and cutting; secondly, digesting gutta-percha from folium cortex eucommiae through leach liquor; thirdly, separating gutta-percha from folium cortex resin through reextraction solution and dissolving the gutta-percha; and fourthly, post-treating materials, principally to dry the dissolved gutta-percha so as to obtain the fine gutta-percha. The method of the invention has the advantages that the leach liquor is nonflammable non-toxic agent, the gutta-percha extraction efficiency is high, the environment is prevented from being polluted, the folium cortex eucommiae is complexly used, no waste generates, the solvent is recycled, the consumption is low, the product quality is high, industrial continuous production is realized, the economic, environment-friendly and social benefits are all better than the traditional production method, and the promotional value is high.

The invention relates to a solder auxiliary soldering method, in particular to a graphene-enhanced Al-based composite solder auxiliary soldering method. The method solves the problems that existing graphene is poor in aluminum base enhancing effect and poor in dispersibility. The method comprises the steps that an oxidized graphene suspension and an aluminum solder suspension are mixed, dried and then placed into a plasma enhanced chemical vapor deposition vacuum device for reduction treatment, then, the mixture is pressed into foils, the graphene/aluminum-based solder foils are placed between to-be-soldered faces of metal to be soldered for vacuum soldering, and the graphene-enhanced Al-based composite solder auxiliary soldering method is completed. The method is used for graphene-enhanced Al-based composite solder auxiliary soldering.

A series of Shuxinding sulfate medicines for preventing and treating arrhythmia includes the solid medicine in the form of tablet, capsule, pill or particle with high stability and biologic utilization rate, and the target medicine in the form of microball, millimicro ball, liposome, or microemulsion with high target performance and low toxic by-effect.

The invention discloses a printed type graphene-based NO2 gas-sensitive element and a preparation method thereof. The preparation method comprises the following step: by fully combining the advantages of intaglio printing technology and graphene, sequentially printing a comb-type interdigital electrode and a graphene sensitive layer on a substrate, thus finally obtaining the printed type graphene-based NO2 gas-sensitive element. The printed type graphene-based NO2 gas-sensitive element has the following advantages that (1) the NO2 gas-sensitive element based on the comb-type interdigital electrode and the graphene sensitive layer has excellent gas-sensitive characteristic and sensitivity on NO2 under the room-temperature condition; (2) the printed type graphene-based NO2 gas-sensitive element is scientific in design, and stable in performance running, and can meet the demands of accurately and continuously monitoring the concentration of NO2 in a life environment in real time; (3) the graphene-based NO2 gas-sensitive element prepared by adopting a printing manner is simple in technology, convenient to operate, low in cost, and suitable for industrial mass production, and technology parameters are easy to control.

The invention relates to a method for preparing a mixed-valent-state iron doped zeolite imidazate skeleton nano-material. The method comprises the steps of simultaneously dispersing bivalent and trivalent iron salts and zinc nitrate into a methanol solvent to form an iron-zinc precursor solution, mixing a 2-methylimidazole methanol solution with the precursor solution, placing the mixture in an oil bath with the temperature of 40 DEG C to 100 DEG C, carrying out a sustained magnetic stirring reaction, and then, subjecting a product to centrifugation, washing and drying treatment, thereby obtaining the mixed-valent-state iron doped zeolite imidazate skeleton nano-material. The mixed-valent-state iron doped zeolite imidazate skeleton nano-material with relatively high yield and uniform and controllable particle size is obtained. According to the method disclosed by the invention, the total iron doped amount can reach 50% to the maximum through adjusting a ratio of bivalent iron salts totrivalent iron salts, and conversion ratios of zinc ions and iron ions can separately reach up to 78% and 60%. The method is simple and economical, and reacted mother liquor can be reused. The obtained nano-material has a relatively high active oxygen generating efficiency under ultrasonic induction, has a tremendous application value in degradation of environmental pollutants and sonodynamic therapy of tumors and can be applied to preparation of high-concentration monoatomic iron-carbon based catalysts.

The invention belongs to the technical field of silica and relates to a preparation method of low defoaming silica. The preparation method comprises S1, adding a sodium sulfate solution into a reactor, stirring the solution, adding a complex surfactant into the solution, and uniformly stirring and heating the solution, S2, adding a sodium silicate solution into the solution, after 0.5min, adding a sulfuric acid solution into the mixed solution, adjusting a sulfuric acid addition rate to control pH to 9.0-9.5 in the reaction process, and then adding a sulfuric acid solution into the mixed solution until terminal pH of 4.0-5.0, S3, continuously stirring the solution at the temperature, carrying out filter pressing on the formed silica, and carrying out washing, drying and crushing to obtain the low defoaming silica. The preparation method has the advantages of simple process, stable process, low production cost and less pollution. The low defoaming silica has low defoaming ability, has good compatibility with a toothpaste foaming agent and effectively enhances washing foam feeling of the toothpaste.

The mulberry leaf flavone extracting process adopts mulberry leaf powder material, alcohol and water as extracting solvent and eluant and macroporous resin as separating material. The extract has mulberry leaf flavone content over 50 %. The present invention has the advantages of non-toxic cheap recoverable solvent, no environmental pollution, great extracted amount, capacity of industrial production and high extracting efficiency.

The invention belongs to the technical field of silicon dioxide, and particularly relates to a preparation method of low-specific-surface-area high-oil-absorption-value friction type silicon dioxide.The preparation method comprises the steps that S1, 8-12 m<3> of ethanol aqueous solution is injected and heated to 60-70 DEG C, and stirring starts; S2, water glass and sulfuric acid are added dropwise to carry out a parallel flow reaction, the pH value in the reaction process is controlled to be 6.0-6.8, meanwhile, absolute ethyl alcohol is added every 5-10 minutes in the reaction process to keep the volume ratio of ethyl alcohol to water in a reaction system to be 1:(3-7), after the water glass is dropwise added, dropwise addition of sulfuric acid is stopped, and stirring continues; S3, stirring and heating are stopped, aging is conducted for one hour, and pressure filtration, washing, drying and crushing are conducted on the on formed silicon dioxide to prepare silicon dioxide. The silicon dioxide has the advantages of a low in specific surface area, a high oil absorption value, a high water absorption amount, the friction property and the like; toothpaste has good friction and cleaning performance after the silicon dioxide is used, and meanwhile, the problem of expansion of the viscosity of the toothpaste is well solved.

The invention discloses functional resin containing 4,6-dimercapto-1,3,5-triazine alkali metal salt and a preparation method thereof. The method comprises the steps of dripping ethanediamine into chloromethylated bead mixture swelled by a solvent to carry out nucleophilic substitution to obtain the resin containing active amino; carrying out substituted grafting reaction on the obtained resin containing the active amino and cyanuric chloride to obtain the resin grafted with the cyanuric chloride; carrying out sulfhydrylation reaction on the prepared resin grafted with the cyanuric chloride in water solution of Na2S and/or NaSH, and then alkalifying with aqueous alkali after the sulfhydrylation reaction is finished. The method is simple in processing equipment, and convenient and simple to operate; and the sulfydryl resin prepared by the method is high in sulfydryl content, large in adsorbing capacity on heavy metal ions, strong in adsorption capacity, strong in regeneration capacity, good in repeated use effect, free of pollution, and low in cost, can remove and gather metal ions of heavy metals such as copper, lead, nickel, chromium, mercury and the like in waste water at the same time, and especially has good absorption efficiency when the concentration of the heavy metals in the waste water is low.

The invention discloses a wave-absorbing type polymethacrylimide foam/chopped fiber composite material and a preparation method thereof. The composite material is formed by uniformly dispersing a chopped fiber wave-absorbing agent in a methacrylic acid/methacrylonitrile copolymer substrate. The composite material is simple in preparation method and low in cost, and the comprehensive mechanical property of the composite material is obviously improved in comparison with that of a polymethacrylimide foam material in the prior art. In addition, the composite material has a certain wave-absorbing effect. Thus, an application range of the polymethacrylimide foam material is enlarged.

The invention provides modified polyethyleneimine, and a preparing method and applications of the modified polyethyleneimine. The modified polyethyleneimine is prepared through modifying polyethyleneimine with different molecular weights with phenylboronic acid compounds. The modified polyethyleneimine has an active targeting property for tumor cell membranes, and can carry genes to form a gene vector composition used for gene therapy. The gene vector composition is uniform in particle size, proper in charge, stable in properties, low in cell toxicity, high in cell transfection efficiency, high in target power, and good in biocompatibility and biodegradability. The modified polyethyleneimine and the gene vector composition can be used for the gene therapy. Preparing processes of the modified polyethyleneimine and the gene vector composition are simple, high in reaction degree controllability and capable of industrial production.

The invention discloses a preparation method and application of cross-linked resin modified by imidazole. The preparation method of cross-linked modified by imidazole comprises the steps that a vinyl-containing imidazole monomer, a divinylbenzene cross-linking agent, an initiator, an o-xylene and/or benzyl alcohol pore-forming agent and a dispersing agent are subjected to suspension polymerization to obtain precursor resin; the precursor resin is subjected to a Friedel-Crafts reaction under the Lewis acid catalytic action, and the cross-linked resin modified by imidazole with the high specific surface area, large pore volume and the proper pore structure and polarity is obtained. The resin is particularly applicable to adsorbing small polar molecular aromatic organic compounds in water. In addition, the preparation method of the cross-linked resin modified by imidazole is simple, low in cost and capable of achieving industrial production.

A nano-photocatalyst with molecular engram function has a 3D pore structure matched fully with the space structure of the compounds in formaldehyde or benzene system and combined specifically with them. It can be used to improve indoor air by adsorbing and degradating said compounds. Its preparing process is also disclosed.

The invention discloses a desulphurization and denitration agent based on waste biomass and a preparation method thereof. The desulphurization and denitration agent contains zeolite catalysts loaded with metal oxides, modified active carbon, waste biomass and a biomass binder. The preparation method of the desulphurization and denitration agent based on the waste biomass comprises the following main steps: firstly, crushing the solid-state biomass waste, the zeolite catalysts and the active carbon to obtain powder; then, uniformly mixing the crushed materials in the biomass binder; and finally, drying and forming the mixed materials to obtain the desulphurization and denitration agent disclosed by the invention. The desulphurization and denitration agent disclosed by the invention not only can be directly used for purifying a high-temperature flue gas of over 600 DEG C, but also can be used for effectively realizing treatment of wastes with processes of wastes against one another, i.e., the biomass waste including crop straws, crop processing waste, timber processing waste or municipal domestic waste, and the like are effectively used to govern flue gas pollution.

The invention belongs to the technical field of solar cells and energies, and particularly relates to a preparation method of a porous nanocrystalline Cu2S counter electrode of a quantum-dot-sensitized solar cell. The preparation method comprises the steps of: regarding copper acetate and thioacetamide as precursors; obtaining 20-100 nm cuprous sulfide (Cu2S) nanometer particles through solvothermal reaction; preparing the cuprous sulfide (Cu2S) nanometer particles and ethanol into a thick liquid; forming 5-10 microns Cu2S nanocrystalline porous film on a conductive base body by utilizing a knife coating method, a silk screen print method or a spin-coating method; sintering at 300-500 DEG C in an inert atmosphere or vacuum for 10-60 min to obtain a battery electrode. The prepared Cu2S nanometer porous counter electrode extremely increases contact area of the counter electrode and electrolyte, further increases catalytic reaction site of the Cu2S and the electrolyte, and improves performance of the solar cell. In addition, the preparation method of the porous nanocrystalline Cu2S counter electrode of the quantum-dot-sensitized solar cell is simple in preparation technology, relatively low in cost and has wide application foreground and wide research values.

The invention provides a veneer which is used for fair-faced concrete building template and has the advantages of lightness, high strength, convenient disassembly and assembly, easy cutting, high cost performance, weather resistance, corrosion prevention, strong durability, easy demoulding, high turnover frequency and being suitable for industrial production. The veneer consists of a covering film, a panel and a core plate; the covering film is prepared from a resin pressed film; the panel is prepared by gluing a gum dipping fiber reinforced composite material; and the core plate is a three-layer structural plate. The invention is mainly used for panels in building template systems, particularly for panels of fair-faced concrete templates.

The invention discloses an orienting fiber membrane through electrospinning, a preparation method and application thereof. The preparation method of the present invention mainly includes the following steps: the preparation of polyamic acid electrospinning solution; accepting the fiber membrane through a self-made electrospinning receiving device, and the nanofiber has a certain orientation; Amination to prepare polyimide nanofiber membrane. The invention adopts a relatively simple process, and realizes good orientation of the nanofiber through a simple receiving device.

The invention provides an organic luminous material and a preparation method thereof, and relates to an organic silicon polymer. Raw materials of the organic luminous material comprise metallic organic substance and polycarbosilane. The preparation method comprises the following steps of: putting polydimethylsiloxane into a reaction kettle, heating the polydimethylsiloxane under the protection ofargon, inflating the argon to the reaction kettle, adding n-hexane into the reaction kettle to dissolve the product after the temperature in the reaction kettle is naturally cooled to room temperature, filtering the product, removing the n-hexane in vacuum to obtain the polycarbosilane, soaking the ground polycarbosilane into ethanol, flushing the insoluble substances by using the ethanol and then drying the insoluble substances in vacuum; and pouring the polycarbosilane powder and the metallic organic substance powder into a three-necked bottle, heating the mixed powder to between 150 and 160 DEG C under the protective atmosphere of argon, preserving the heat for 1 to 1.5 hours, heating the mixed powder to between 260 and 270 DEG C, preserving the heat for 1 to 1.5 hours, dissolving the product by using the dry n-hexane after the reaction is finished and the product is cooled, filtering the product to remove the insoluble substances, and finally distilling the product with reduced pressure to obtain the powdery solid organic luminous material.