Patents
Literature

184results about How to "low equipment requirements" patented technology

Shale compressibility comprehensive evaluation method based on uniaxial strength experiment

InactiveCN104777035AThe experimental process is simple and easyLow equipment requirements
The invention provides a shale compressibility comprehensive evaluation method based on uniaxial strength experiment. The method comprises the steps of (1) taking a shale core sample for executing uniaxial compressive strength test, testing an elasticity parameter, and drawing a stress-strain curve diagram; (2) calculating normalized elasticity modulus and normalized poisson ratio to obtain a brittleness index; (3) obtaining key points on the stress-strain curve, and calculating the shape index of the stress-strain curve; (4) obtaining fracture distribution diagram of the side face of the fixed sample, and calculating a fracture distribution index through box-counting dimension method; (5) measuring spallation fragment mass distribution at different scales through a screen and a balance so as to obtain a block distribution index; and (6) calculating arithmetic mean value of the obtained brittleness index, shape index of the stress-strain curve, fracture distribution index and block distribution index of fragments to get the comprehensive compressibility index. The method provided by the invention is used for evaluating fracture net forming capability of the shale after being compressed, the experiment is simple and easy to carry out, and post treatment is visual and simple, so that the method is suitable for indoor evaluation and oilfield in-site application.
Owner:SOUTHWEST PETROLEUM UNIV

Method for complex-precipitation aluminum removal in rare earth solution

The invention relates to a production method for removing aluminum (Al<3+>) and purifying rare earth from a rare earth solution and belongs to the field of rare earth hydrometallurgy and chemistry. The method comprises the following steps that (1) raw materials are prepared, the pH value of the rare earth solution is smaller than or equal to 3, the concentration of REO is 20 g/L-300 g/L, and the concentration of Al2O3 is 0.8 g/L-3 g/L; a complex precipitant is one of hydroxyquinoline or ramifications of the hydroxyquinoline; and (2) precipitation aluminum removal is conducted, the complex precipitant is added into the rare earth solution prepared in the step (1), stirring is conducted at the constant temperature, a reaction is conducted, the pH value of the solution is adjusted, precipitation is conducted, and aluminum-removed rare earth liquid is obtained through vacuum filtration and separation. According to the production method, the rare earth solution containing a large quantity of aluminum ions is treated through the hydroxyquinoline or the ramifications of the hydroxyquinoline, the aluminum ions can be removed from the rare earth solution, the effect that the aluminum ion removal rate reaches 90% or above is guaranteed, the rare earth loss ratio is not larger than 5%, and the aluminum ion concentration in the rare earth solution is greatly decreased.
Owner:JIANGXI UNIV OF SCI & TECH

Bi2O3/(BiO)2CO3 heterojunction catalyst with visible photocatalytic activity and preparation method for Bi2O3/(BiO)2CO3 heterojunction catalyst

The invention discloses a preparation method for a Bi2O3/(BiO)2CO3 heterojunction catalyst with visible photocatalytic activity. The preparation method comprises the following steps: mixing and dissolving bismuth nitrate pentahydrate or bismuth citrate and urea into deionized water, and carrying out room temperature stirring to form a precursor solution; transferring the precursor solution into a high-pressure reaction kettle, preserving the temperature under 160 to 180 DEG C for 12 to 24 hours, and performing furnace cooling to room temperature; washing the obtained powder by deionized water and absolute ethyl alcohol in sequence, and then performing vacuum drying under the temperature of 80 DEG C to obtain (BiO)2CO3 powder; putting the (BiO)2CO3 powder under the temperature of 400 to 450 DEG C for calcining for 20 to 60min to obtain the Bi2O3/(BiO)2CO3 heterojunction catalyst. The preparation method has the beneficial effects that hydrothermal treatment is firstly carried out, and then calcining is performed to obtain a product. The preparation method is easy to operate, and the equipment requirement is low; various complicated synthesis devices are not needed; the formation of a heterojunction interface is favorable for transferring of photo-generated electrons and photo-generated holes and the improvement of the catalytic activity; the prepared heterojunction catalyst is higher in photocatalysis performance than that of pure Bi2O3 and pure (BiO)2CO3.
Owner:INST OF EARTH ENVIRONMENT CHINESE ACAD OF SCI

Method for preparing nitrogen doped grading-hole porous carbon microspheres

The invention discloses a method for preparing nitrogen doped porous carbon microspheres and belongs to the technical field of carbon materials. The method for preparing the nitrogen doped porous carbon microspheres comprises the following two steps of: 1, adding 20-50 mL of deionized water into a certain mass ratio of ammonium salt (such as ammonium chloride, ammonium sulfate or ammonium nitrate) and porous starch, carrying out magnetic stirring for 3-6 hours so that the ammonium salt is sufficiently adsorbed by the porous starch, then carrying out suction filtration and drying to obtain the porous starch with the ammonium salt; and 2, carbonizing the porous starch adsorbed with the ammonium salt for 2-6 hours at the temperature of 600-900 DEG C under the protection of inert atmosphere to obtain the nitrogen doped porous carbon microspheres. According to the invention, the used raw material in the method is the cheap and available commercialized porous starch; the nitrogen doped porous carbon microsphere is prepared on the basis that the original porous morphology of the porous starch is ensured, preparation process has no high requirement on equipment and is easy to operate, the preparation of the porous carbon microsphere which has a porous structure and is doped with nitrogen atoms is achieved by one step; and the material prepared by using the method has a potential application prospect in the fields of biological materials, catalysis, electrochemistry and the like.
Owner:DALIAN UNIV OF TECH

Alcohol-soluble polyurethane resin used in plastic ink and preparation method thereof

The invention discloses an alcohol-soluble polyurethane resin used in plastic ink. The alcohol-soluble polyurethane resin is characterized by comprising the following ingredients by weight: 2.5-8 parts of polyester polyol, 20-30 parts of polyether polyol, 5-10 parts of diisocyanate, 1-5 parts of diamine, 60-66 parts of alcohol diluent, and 0.01-0.15 part of stabilizer. The invention further discloses a preparation method of the alcohol-soluble polyurethane resin used in plastic ink, and the preparation method is simple in process and low in equipment requirement. The average molecular weight of the alcohol-soluble polyurethane resin used in plastic ink is 20000-30000, and the solid content is 34-36%, and the alcohol-soluble polyurethane resin can be used as a bonding material to be prepared into ink, merely the alcohol is used as a solvent, and as the solvent or a part of solvent is replaced by water, the alcohol-soluble polyurethane resin is environmental-friendly, safe, very beneficial for environmental protection and convenient to use; the diluent can be a water solution of water and alcohol or alcohol; a printed ink layer is high in glossiness and has good transparency, water resistance and weather resistance; and as a result, the alcohol-soluble polyurethane resin is suitable for various intaglio and rotation flexography, with good transitivity and adhesion solidness.
Owner:DONGGUAN HONGDA POLYUREFHANE RESIN

Device for realizing reciprocating extrusion process on one-way hydraulic press

ActiveCN103962404Alow equipment requirementsEasy unloading
The invention discloses a device for realizing a reciprocating extrusion process on a one-way hydraulic press. The device is characterized in that a hollow cylindrical cavity is formed in an annular extrusion cylinder; an upper male die and a lower male die which can be in axial sliding in the hollow cylindrical cavity are respectively arranged at the top and the bottom of the hollow cylindrical cavity; a cylindrical blank is placed in the hollow cylindrical cavity; a die core inserted block is clamped and embedded into a groove in the inner cylinder wall of the annular extrusion cylinder to form an annular reduced section; the circumference of the annular extrusion cylinder is fixedly sleeved with a pre-tightening ring; a female die pressing plate is fixedly connected to the top of the pre-tightening ring and is propped against the top surface of the annular extrusion cylinder; a female die composed of the annular extrusion cylinder, the female die pressing plate, the pre-tightening ring and the die core inserted block is formed in the manner that the bottom surface of the pre-tightening ring or the top surface of the female die pressing plate is placed in a downward-concave platform on the top surface of a female die fixing plate to form an upright-placing or inverted state; an nitrogen spring in the hollow cavity of a base forms underpropping to the lower male die. According to the invention, the reciprocating extrusion technology on the one-way hydraulic press is realized in an assisting way, reciprocating extrusion deformation under different extrusion ratios can be satisfied, and the fine and equiaxed fine-grain tissues can be achieved.
Owner:HEFEI UNIV OF TECH

MoO3 and ordered mesoporous carbon composite electrode material and preparation method thereof

The invention relates to a MoO3 and ordered mesoporous carbon composite electrode material and a preparation method thereof. In the invention, a double electric layer capacitor provided by ordered mesoporous carbon and a pseudo-capacitor provided the stratiform transition metal oxide MoO3 are utilized together to improve the comprehensive electrochemical properties of the capacitors. The composite material has an ordered mesoscopic structure, and MoO3 nano particles have uniform size and are uniformly dispersed in a host ordered mesoporous carbon material, wherein the size of the MoO3 nano particles is smaller than 4nm, and the mass ratio of the host ordered mesoporous carbon material to a guest ordered mesoporous carbon material is 1:(0.01-0.18). The method comprises the following steps of: carrying out surface fictionalization treatment on the host material; then filling precursor solution MoO3.0.5H2O2.H2O sol into ordered pore canals of the host mesoporous carbon material by using a liquid phase synthesis method; and finally obtaining a MoO3 and ordered mesoporous carbon composite electrode material through filtering, washing and heat treatment. Proved by electrochemical testing, the discharge specific capacitance of the composite electrode material is improved and the stability is good. The invention has simple process, low equipment requirement, and strong maneuverability and can be realized at normal temperature. The invention can be widely applied to electrode materials of electrical devices.
Owner:WUHAN UNIV OF TECH

Preparation method of halogen-free flame-retardant composition and flame-retardant polyolefin composition consisting of same

The invention discloses a preparation method of a halogen-free flame-retardant composition. The preparation method comprises the following steps: (a) weighing melamine phosphate, piperazine diphosphate and assistant activator in a proportion, and putting in a high-speed mixing machine for stirring and mixing uniformly to obtain a halogen-free flame-retardant composition premix; and (b) performing a high-temperature dehydration condensation reaction on the halogen-free flame-retardant composition to obtain the halogen-free flame-retardant composition taking burnt (poly) melamine phosphate and burnt (poly) piperazine sulfate as main components. According to the preparation method of the halogen-free flame-retardant composition disclosed by the invention, the technology is simple and practicable, the requirement for equipment is low, the yield of product is as high as more than 90%, the phosphorus content is high, and the impurities such as halogen or inorganic salt are not contained; a flame-retardant polyolefin composition prepared from the halogen-free flame-retardant composition can obtain good flame-retardant performance after a small amount of halogen-free flame-retardant composition is added, and the composition has high water resistance and heat resistance and excellent pigmenting property, can be prepared into various forming products according to different uses, and has excellent industrial application prospect.
Owner:KINGFA SCI & TECH CO LTD

Porous carbon material with high specific surface area prepared by virtue of fungal pretreatment as well as method and application thereof

The invention belongs to the technical field of preparation of porous carbon materials, and discloses a porous carbon material with a high specific surface area by virtue of fungal pretreatment as well as a method and application thereof. The method comprises the following steps: (1) drying and crushing waste biomass to obtain crushed waste biomass; 2) carrying out the constant-temperature oscillation reaction for the crushed waste biomass and fungal spore suspension in a liquid culture medium, filtering, washing, and drying to obtain a carbonization precursor; carrying out the high-temperature carbonization treatment to obtain a primary carbonized substance; and 3) activating the primary carbonized substance and an activator in inert atmosphere to obtain the porous carbon material with ahigh specific surface area. According to the invention, the porous carbon material is prepared by virtue of the regulation of fungal treatment, so that the waste biomass is effectively utilized, the preparation process is simple, the production cost is low, and the method is environment-friendly; and the obtained porous carbon material is high in specific surface area and unique in aperture distribution and capable of obtaining micro-porous, mesoporous or micro-mesoporous carbon materials. The porous carbon material is applied to the field of adsorption.
Owner:SOUTH CHINA UNIV OF TECH

Method for extracting phytic acid from jatropha curcas seed cake or jatropha curcas seeds

The invention discloses a method for extracting phytic acid from jatropha curcas seed cakes or jatropha curcas seeds, and the phytic acid is prepared by using the jatropha curcas seed cakes or the jatropha curcas seeds, the oil which is extracted, as raw materials and adopting the steps as follows: lixiviating with diluted acid, removing impurity, neutralizing with alkali, splitting with acid, ion exchanging, decoloring and concentrating. The invention can also be used for preparing feed protein while prepaing the phytic acid, and has high yield and better purity. The extraction rate of the phytic acid is more than 80 percent, the yield of the phytic acid reaches 8-9 percent, and the prepared phytic acid is concentrated liquid with concentration reaching 50-60 percent. After the phytic acid is extracted, the content of crude protein in the residue is further concentrated and improved to reach 25-30 percent; the in vitro digestibility coefficient of the crude protein reaches 43.57 percent and is improved by about 150 percent, compared with the in vitro digestibility coefficient of the crude protein of the seed cakes the phytic acid of which is not extracted. The invention has simple process, wild condition and low energy consumption, meets the requirement of the environment protection, and is a green process of comprehensively utilizing the jatropha curcas seed cakes or jatropha curcas seeds.
Owner:GUIZHOU UNIV

Fuel cell-based distributed energy system using liquefied natural gas as feedstock

The invention provides a distributed energy system based on fuel cell using liquefied natural gas as raw material, which comprises a solid oxide fuel cell subsystem, a steam injection gas turbine subsystem and a liquefied natural gas refrigeration subsystem. An outlet of the fuel compressor is communicated with an inlet of the preformer and an inlet of the combustion chamber respectively; An outlet of the aftercombustion chamber is communicated with an inlet of the combustion chamber; An outlet of the combustion chamber communicates with an inlet of the gas turbine; The heat medium inlet of the waste heat boiler is communicated with the outlet of the gas turbine through the preheater, the heat medium outlet is communicated with the inlet of the first heat release passage of the first condenser, and the cold medium outlet is communicated with the inlet of the combustion chamber. An inlet of the first endothermic passage of the first condenser is in communication with the LNG satellite station, and an outlet of the first endothermic passage is in communication with an inlet of the fuel compressor. The distributed energy system provided by the invention not only optimizes the energy structure but also saves energy and environmental protection, and has important guiding significance for the rational utilization of the energy of the LNG satellite station in China.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)

Metal nanoparticle-foamy carbon catalyst, and preparation method and application thereof

The invention discloses a preparation method and an electrochemical catalysis application of a metal nanoparticle-foamy carbon catalyst. The preparation method comprises the following steps: (1) a polymerizable vinyl monomer is adopted as an oil phase, a metal precursor-containing water solution is adopted as a water phase, functional polymer nanoparticles are adopted as an emulsifier, and a stable high-internal-phase Pickering emulsion is prepared; (2) the oil phase is polymerized and the internal phase is removed with a radical polymerization method, such that a polymerized high-internal-phase foam material is obtained; (3) the metal ion precursor in the polymerized high-internal-phase foam is reduced into metal nanoparticles, such that a metal nanoparticle-polymer form hybrid material is obtained; (4) high-temperature calcination is further carried out under a nitrogen atmosphere, such that a metal nanoparticle-foamy carbon hybrid material is obtained; and (5) the above material is loaded on a clean glassy carbon electrode, and electrochemical catalytic application can be carried out. The metal nanoparticle-foamy carbon catalyst preparation method has the advantages of simple process and low equipment requirement. The obtained material has good conductivity and large specific surface area. The material has a good catalytic effect in the aspect of electrochemistry.
Owner:XIANGTAN UNIV

Resource utilization method for red gypsum produced by means of sulfuric acid process of titanium dioxide factory

InactiveCN102701706AMild process conditionslow equipment requirements
The invention provides a resource utilization method for red gypsum produced by means of a sulfuric acid process of a titanium dioxide factory. The method is characterized in that the red gypsum produced by means of the sulfuric acid process of the titanium dioxide factory serves as a raw material, magnesium oxychloride cement is combined to modify and prepare a wall body material. The characteristics of gelatinization and high strength of the magnesium oxychloride cement are utilized, and the red gypsum is added to be modified so as to achieve resource utilization of the red gypsum and eliminate environmental hidden danger. A main ingredient of the red gypsum is calcium sulphate dehydrate. In addition, the content of impurities including iron, aluminum, silicon and the like is high, density degree of products can be improved by adding the magnesium oxychloride cement in preparation, and further abrasive resistance and strength of the products are improved. Good water-resistance effect can be obtained. The wall body material prepared by the red gypsum produced by means of the sulfuric acid process of the titanium dioxide factory is not intervened by strong acid and strong base, needs normal pressure and temperature and has not high requirements for device materials. The utilization rate of the raw material is high, the process flow is simple, and the method is a novel red gypsum resource utilization method.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI

High-strength heat-resistant cast aluminum-copper alloy with low porosity and preparation process

The invention relates to a high-strength heat-resistant cast aluminum-copper alloy with the low porosity and a preparation process. According to the alloy, the higher Ti and B contents, the high V content and the low Zr content are adopted, and the Zr/V ratio is controlled to be less than or equal to 0.625, so that Zr, Ti and B are synergized to refine grains, the interdendritic hole formation iscontrolled, and the heat cracking resistance of V cannot be reduced due to Zr. Meanwhile, during raw material preparation, tool preparation and smelting processes, on the basis of adopting a high-purity argon and intense agitation combination H-removal process measure, through adding trace of rare earth element RE, the content of the melt H is further reduced, the formation of high-strength heat-resistant cast aluminum-copper alloy casting blow holes and pin holes is controlled, and the performance of a large-scale casting body is improved. The preparation process comprises the steps of smelting and casting the alloy, and carrying out solution and aging treatment on the casting. The high-strength heat-resistant cast aluminum-copper alloy with the low porosity provided by the invention canbe used for preparing the large-scale aluminum-copper alloy casting with the low porosity, a dense structure and no heat cracking, and the casting has favorable mechanical property, heat resistance and cutting processability.
Owner:CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products