68results about How to "No import" patented technology

The invention discloses an all-wet recovery process for waste circuit boards. The all-wet recovery process comprises the following steps of crushing and reselecting the waste circuit boards to obtain multi-metal powder of the waste circuit boards; performing leaching on the multi-metal powder of the waste circuit boards with an acid solution with the concentration of 0.1-4 mol/L, and obtaining leach liquid and leach residues after solid-liquid separation; adding copper compounds and an acid solution with the concentration of 0.5-5 mol/L into the leach residues to replace and strip tin, and obtaining tin-bearing liquid and tin-separated residues after solid-liquid separation; adding an acid solution with the concentration of 0.2-6 mol/L into the tin-separated residues, leading oxygen and/or air into the mixture for an oxidation reaction, and obtaining copper-bearing liquid and precious metal residues after solid-liquid separation; and performing vortex electrodeposition on the copper-bearing liquid to obtain cathode copper. According to the all-wet recovery process for the waste circuit boards, the all-wet recovery process is provided for treating the waste circuit boards, so that directional separation, gathering and extraction of valuable metal in the process steps are achieved, and the problems of the dispersed moving of valuable metal elements of the waste circuit boards, the difficulty in subsequent separation and extraction and the like are solved.

The invention relates to a method for enhancing density of a SiC/SiC ceramic matrix composite. The method comprises the following steps: (1) a SiC/SiC ceramic matrix composite with a certain densification degree is immersed in slurry, in which an organic precursor and SiC powder are uniformly dispersed, and impregnation is carried out in an environment of 5-10 KPa vacuum degree for 20-50 min; (2) a material which has undergone vacuum impregnation is dried and the dried material undergoes cross-linking and curing; (3) the cross-linked and cured material undergoes pyrolysis treatment; and (4) the material which has undergone pyrolysis treatment further undergoes densification process in the atmosphere of a gaseous precursor containing Si and C elements by a chemical vapor infiltration technology while infiltration temperature is 850-1100 DEG C, pressure intensity is 10-20 KPa and infiltration time is 4-30 h. The method provided by the invention has advantages of simple operation, short densification time, good repeatability and high densification efficiency and has obvious advantages in the aspect of filling material voids. The method is a method with operability and development prospect.

The invention provides a method for preparing a Ni2P catalyst, which belongs to the field of the petrochemical industry. The method comprises the following steps of: using metallic nickel as a precursor; separately placing a catalyst precursor (non-loading or loading nickel) and hypophosphite by the P/Ni mole ratio of 2 to 4 on two reaction beds in a closed reactor in which gas can flow; and heating to 150 to 300 DEG C to react for 1 to 3 hours at the speed of 5 to 30 DEG C/min in an inert gas atmosphere and under a closed condition, so as to prepare various non-loading or loading Ni2P catalysts. By using the preparation method provided by the invention, the catalyst can be prevented from introducing impurities, high-temperature and high-pressure treatment is not needed in the preparation process, PH3 poisonous gas is not used, the preparation methods and the advantages of the preparation methods of various efficient nickel catalysts can be transplanted to be used for preparing the Ni2P catalyst, and the preparation method is suitable for the industrial production.

The invention discloses a method for positioning transversely-growing zinc oxide nanowires on a silicon electrode through chemical vapor deposition. The method comprises the steps as follows: preparation of zinc vapor, delivery of the zinc vapor and synthesis and deposition of zinc oxide. In the step of delivery of the zinc vapor, the included angle formed by the speed direction and a silicon electrode growth surface is in a range of 85-95 degrees when the zinc vapor is contacted with the silicon electrode growth surface. Particularly, the included angle formed by the speed direction and the gravity direction of the zinc vapor is in a range of 0-5 degrees. According to the method, the included angle formed by the speed direction and the silicon electrode growth surface is in the range of 85-95 degrees when the zinc vapor is contacted with the silicon electrode, the zinc vapor firstly reacts with oxygen on edges to be crystalized to produce zinc oxide nanometer points, and the nanometer points grow preferentially and finally form the transversely-growing zinc oxide nanowires. According to the method, a metal catalyst is not required to be evaporated on the surface in advance, and the method has the advantages that processes are simplified and impurities are avoided; and the transversely-growing zinc oxide nanowires can also be independently prepared on the silicon electrode with the method.

The invention relates to the technical field of high-entropy ceramic materials, in particular to layered high-entropy double-boron carbide ceramic powder and a preparation method thereof. The chemical formula of layered high-entropy double-boron carbide in the layered high-entropy double-boron carbide ceramic powder is REB2C2, wherein RE is at least three different elements selected from Y, Ce, Gd, Dy and Er, and the molar ratio of each of the elements is 1. The preparation method comprises the following steps: ball-milling and mixing at least three metal oxides, a boron source and a carbon source, compacting the uniformly mixed powder to obtain a densified green body, sintering the green body at high temperature to obtain a layered high-entropy double-boron carbide block material, and finally, carrying out crushing and grinding to obtain the layered high-entropy double-boron carbide powder. The single-phase high-entropy double-boron carbide ceramic powder with uniform components can be synthesized by taking the metal oxides as raw materials and adopting a carbon/boron thermal reduction method; and the method is simple in preparation process, easy to control the reaction process, free of impurity introduction, low in product preparation cost and suitable for batch production.

The invention discloses a preparation method of insoluble egg protein aggregate particles as well as an application thereof and belongs to the technical field of food. According to the invention, the egg protein aggregate particles are prepared by a combined heat treatment-mechanical shearing technology. This kind of particles have very good suspension stability in water, and have approximately spherical shapes whose granule particle sizes are 0.03-3 microns. Moreover, this kind of particles have very good wetting properties that the particles can be rapidly re-watered after drying, and the re-watered colloid has viscosity and smoothness similar to those of the fat as well as sensory properties of the colloid. The egg protein aggregate particles disclosed by the invention are used as emulsifiers, thickeners, brighteners, turbid agents and stabilizers in the food systems, including beverages, coffees, salad sauces, ice creams and the like, so as to maintain sensory properties of the systems while reducing fat contents and improving added nutritional values.

The invention discloses a preparation method of a nanocrystal lithium-rich single-phase Li-Si compound block material, belonging to the technical field of nanometer functional materials. The preparation method comprises the steps of: firstly weighing certain quantity of Li and Si according to target components and preparing a LixSi alloy ingot by utilizing a discharge plasma sintering technology; crushing the alloy ingot into powder and then ball-milling to obtain alloy powder in an amorphous structure; and finally sintering-molding the amorphous powder rapidly by utilizing the discharge plasma sintering technology to obtain a single-phase LixSi nanocrystal block material. The preparation method of the nanocrystal lithium-rich single-phase Li-Si compound block material, disclosed by the invention, has the advantages of pure phase, fine crystal particles, high density, simple and practicable process route and short synthetic cycle.

The invention discloses a technological method for reducing a defect of an extrusion rod. According to the technological method, an unleaded alloy electro-magnetic induction melting furnace serves as a melting furnace, and metal melting liquid is pumped into a heat preservation furnace made of the same titanium alloy for continuous casting after refinement, so that oxidation of the metal melting liquid and lead-in of oxidation impurities on the surface of the metal melting liquid are avoided; casting ingot components can be prevented from generating segregation effectively by a process that continuous casting is conducted by a condenser; the mass of a sawed casting ingot is greater than 35KG; the defect of a product due to a joint between the ingots in the traditional casting extrusion process is reduced effectively; and a casting ingot oxidation film, the segregation of the product and breakage of a follow-up wire drawing technology are avoided by utilizing the unleaded titanium alloy electro-magnetic induction tin melting furnace and the titanium alloy liner heat preservation furnace and adopting a horizontal continuous casting method, so that the production quality of a drawing wire is improved, the production cost is saved, and the technological method can be used for industrial production.

The invention provides a graphdiyne nanosheet based multifunctional medicine carrying system as well as a preparation method and application thereof. For the graphdiyne nanosheet based multifunctionalmedicine carrying system, the graphdiyne nanosheet based multifunctional medicine carrying system is a medicine carrying system formed by loading medicine molecules on a graphdiyne nanosheet throughthe Pi-Pi conjugation and electrostatic mutual effect. The graphdiyne nanosheet based multifunctional medicine carrying system can be well dispersed in a water solution, and has good solid tumor high-permeability and retention (EPR) effect; the targeting goal is realized; the characteristics of laser and pH dual response release are realized. The preparation method of the graphdiyne nanosheet based multifunctional medicine carrying system is simple and is easy to implement; the reaction conditions are mild; the medicine carrying rate is high; the introduction of hazardous reagents is avoided;good biocompatibility and safety are realized; wide application prospects are realized in the field of biological medicine.

The invention discloses a method for improving colors of polyether polyol. The method is implemented by the aid of two-step processes and includes adding decolorizing agents H2O2 into high-pressure reaction kettles after first phases, in other words, reaction between initiators and ethylene oxide in the high-pressure reaction kettles, are completely carried out in polyether polyol preparation procedures, heating the decolorizing agents, vacuumizing the high-pressure reaction kettles for 30 minutes and removing the decolorizing agents; adding compound decolorizing agents into the reaction kettles after the polyether polyol is completely prepared, heating the compound decolorizing agents and filtering and removing the compound decolorizing agents to obtain the color-improved polyether polyol. The method has the advantages that the polyether polyol obtained by the aid of the method is high in yield, the production cost can be reduced, the procedures are easy to implement, the decolorizing agents are easy to remove, impurities can be prevented from being led into the polyether polyol, and the like.

The invention relates to a photo-anode material, in particular to a photo-anode nano composite membrane material (CdSe/CdS/TiO2 composite membrane photo-anode) prepared by adopting an impregnation-deposition method and a cyclic voltammetry and application. CdSe and CdS nano particles are compounded on the surface of a TiO2 nanowire by adopting the impregnation-deposition method and the cyclic voltammetry to prepare the CdSe/CdS/TiO2 nano composite membrane photo-anode material. When the composite membrane is used as a photo-anode material for cathodic protection, compared with a pure TiO2 material, the photo-anode nano composite membrane material has the advantages that the visible light utilization rate of TiO2 and the separation rate of photo-induced electron-hole pairs are remarkably improved, the electrode potential of Q235 carbon steel is reduced, the corrosion rate is reduced, and the photo-induced cathodic protection performance of TiO2 on Q235 carbon steel is effectively improved.

The invention relates to a preparation method of kidney sertoli cells and special mediums thereof, in particular provides a method of inducing mesenchymal stem cells into the kidney sertoli cells, and the method comprises the following steps: (1) inoculating the mesenchymal stem cells into a medium I; and (2) transferring the mesenchymal stem cells done in step (1) into a medium II so as to obtain the kidney sertoli cells, wherein the medium I is composed of a zooblast basic medium and solutes, and the solutes comprise 1.9 percent to 2.1 percent of fetal calf serum, 9.75ng/mL to 10.25ng/mL of activin A and 0.95*10 to 5mol/L to 1.05*10 to 5mol/L of tretinoin; and the medium II is composed of a zooblast basic medium and solutes, and the solutes comprise 1.9 percent to 2.1 percent of fetal calf serum, 9.75ng/mL to 10.25ng/mL of activin A, 0.95*10 to 7mol/L to 1.05*10 to 7mol/L of tretinoin and 19ng/ml to 21ng/ml of BMP7. An induction culture method of the invention is suitable for the mesenchymal stem cells of various sources, and is free of virus introduction, easy in operation and high in efficiency.

The invention discloses a preparation method of lithium tetrafluoroborate. The preparation method comprises the following steps: 1) adding boric acid into hydrofluoric acid and reacting to obtain a fluoboric acid solution; 2) adding a lithium compound into the fluoboric acid solution and reacting to obtain a lithium tetrafluoroborate solution; 3) concentrating the lithium tetrafluoroborate solution, cooling, crystallizing and filtering to obtain lithium tetrafluoroborate crystals; 4) drying the lithium tetrafluoroborate crystals to obtain a lithium tetrafluoroborate crude product; and 5) putting the lithium tetrafluoroborate crude product into a reactor, introducing fluorine gas or fluorine-nitrogen mixed gas and reacting to obtain lithium tetrafluoroborate. According to the preparation method of lithium tetrafluoroborate disclosed by the invention, the deficiencies of the existing preparation method are made up, the process is simple to operate, no organic solvent is introduced, and the obtained lithium tetrafluoroborate product is high in purity and low in water content; and the whole preparation process is strong in operability and high in utilization rate of raw materials, has no emission of three wastes, and is suitable for large-scale industrial production.

The invention discloses a method for refining dihydroquercetin from larch by using micro-porous resin. The method comprises the following steps: (1) after crushing the raw material larch wood, adding ethanol water solution to extract, collecting extracting solution and concentrating to obtain extract; (2) performing liquid phase adsorption separation on the extract by using micro-porous resin MCI, performing gradient elution by taking the ethanol water solution with volume fraction of 0-30 percent as an eluant, collecting and combining elution components with volume fraction of 20-25 percent, concentrating and drying to obtain a dihydroquercetin rough product; and (3) recrystallizing the dihydroquercetin rough product to obtain refined dihydroquercetin. According to the method, environment-friendly solvents such as water and ethanol are adopted, are pollution-free and can be recycled; the used adsorbent micro-porous resin introduces less impurities and can be reused for times; the obtained product has purity of greater than 99 percent and has no toxic ingredient residues, and the pharmaceutical-grade raw material can be directly obtained. The method has the advantages of simple route, economy, environmental friendliness and high yield and is suitable for industrial production.

The invention provides a preparation method of a single pure-phase bismuth ferrite material based on ionic compensation, which belongs to the field of ceramic material preparation. Firstly, a bismuth ferrite ceramic reaction mixture is prepared and then is dried for presintering for the first time; then 0.3 to 0.7wt percent of bismuth oxide is added through secondary ball milling for ionic compensation, and drying is performed for presintering for the second time; 0.2 to 0.4wt percent of bismuth oxide is added through third ball milling for ionic compensation, drying is performed for presintering for 0.5 to 1.5 h at 810 to 835 DEG C, and natural cooling is performed to room temperature along with a furnace, so as to obtain the single pure-phase bismuth ferrite material. According to the preparation method, the bismuth oxide and ferric oxide are used as raw materials, and three-step sintering and twice ionic compensation are adopted to prepare the single pure-phase bismuth ferrite material, so as to solve the technical problem of composition segregation caused by volatile bismuth oxide in the preparation process of bismuth ferrite and prepare the single pure-phase bismuth ferrite material.

The invention provides a submicron hollow cobalt ferrite electromagnetic wave-absorbing material and a preparation method thereof. The submicron hollow cobalt ferrite electromagnetic wave-absorbing material is prepared by taking ferric chloride hexahydrate and cobalt chloride hexahydrate as main raw materials. Cobalt ferrite is generated through a hydrothermal method. The submicron hollow cobalt ferrite wave-absorbing material prepared by the hydrothermal method has the advantages of energy conservation, consumption reduction, simple operation process and the like. The product is submicron powder, the small-size effect and the interface effect are increased, the product is of a hollow structure, impedance matching is improved, the electric loss capacity is improved, and the electromagneticwave absorption capacity of the material is improved.

The invention discloses a method for preparing a Zaorenanshen oral liquid. The method adopts a form of combining a plurality of separation modes, improves the clarity on the basis of realizing the maximum reservation of effective components in a Zaorenanshen liquid in the manners of cold sink and centrifugation of extracted concentrate, and external pressure ultrafiltration after the addition of oral liquid ingredients, and the like, realizes continuous alcohol-free production of the Zaorenanshen liquid, avoids the introduction of impurities, and has the advantages of simple operation, low cost and the like, and the Zaorenanshen liquid prepared by the method reserves effective components, and has good clarity, high uniformity and good treatment effect without introducing any impurities.