Patents
Literature
Eureka-AI is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Eureka AI

522 results about "Pore distribution" patented technology

Pore Size Distribution. There is not a unique definition of “pore diameter” or “pore size”. Every method of pore size determination defines a pore size in terms of a pore model which is best suited to the quantity measured in the particular experiment. There is the same situation for the definition of void space.

Catalyzer for oxalic ester hydrogenation synthesizing of glycolate and method of preparing the same

A catalyst for hydrogenated synthesis of glycollate with oxalate and a preparation method for the catalyst belong to the glycollate preparation technical field. The catalyst of the present invention uses the copper metal as the main active component, and silver as the promoter, and is manufactured with the method of immersion. A carrier of the catalyst is the modified silica sol. The select content of the copper metal is 5 to 45 percent of the carrier weight, and the optimal content of the copper metal is 10 to 40 percent. The content of silver metal is 0.1 to 15 percent of the carrier weight, and the optimal content of silver metal is 1 to 8.0 percent. The select carrier is the silica sol with a double peak pore distribution structure and the specific surface area of the carrier is 100-300m2/g; and the optimal specific surface area of the carrier is 120-240m2/g. The present invention settles the problem of applying a Cr/Cu catalyst in the oxalate gas-phase catalytic hydrogenation. Proven by experiments, the catalyst is provided with the very high reaction activity and glycollate selectivity in the reaction to synthesize glycollate with oxalate and hydrogen Moreover, the catalyst is provided with the long usable life and the stable reaction performance, and can be easily controlled.
Owner:TIANJIN UNIV

Mesoporous X-type molecular sieve, adsorbent based on molecular sieve, and preparation and application thereof

The invention relates to a preparation method of a mesoporous X-type molecular sieve and a method for preparing an adsorbent by using the molecular sieve as an active component. The prepared adsorbent based on the mesoporous X-type molecular sieve is used as a paraxylene adsorptive separation adsorbent. The method for preparing the mesoporous X-type molecular sieve comprises the following steps: by using water glass as a silicon source and aluminum hydroxide as an aluminum source, adding a template, and carrying out hydrothermal synthesis to obtain the mesoporous X-type molecular sieve. The mesoporous molecular sieve and kaolin are proportionally molded to obtain 0.3-0.8mm granules, and the granules are subjected to barium ion or (and) potassium ion exchange until the exchange degree is greater than 99%, thereby obtaining the adsorbent which has excellent adsorptive separation capacity for paraxylene in C8 aromatic hydrocarbons. Compared with the prior art, the active component mesoporous X-type molecular sieve of the adsorbent, which is prepared by using the template, has the crystal form structure of the X-type molecular sieve and the pore distribution of the mesoporous and microporous dual models; the mesoporous pore size distribution is 2nm or so; and thus, the problem of overlow mass transfer rate in the adsorbent can be solved.
Owner:SHANGHAI LVQIANG NEW MATERIALS CO LTD +1

Selectivity hydrogenation method for whole fraction crack petroleum

The invention relates to a method for selective hydrogenation of full-run pyrolysis gasoline, which mainly solves the technical problem in the prior art that it is difficult to selectively hydrogenate full-run pyrolysis gasoline with high colloid and free water content. The present invention adopts the pyrolysis gasoline and hydrogen of the hydrocarbon compound fraction with C5 hydrocarbon to dry point of 204 DEG C as raw materials, the reaction temperature is 30 to 80 DEG C, the reaction pressure is 2.0 to 3.0 MPa, and the fresh oil space velocity is 2.5 to 5.0 hour-1, under the condition that the hydrogen/oil volume ratio is 60-120:1, the raw material is contacted with the catalyst and reacts to convert the diolefin and alkenyl aromatic components in the raw material into monoolefin and alkylaromatic. Including alumina support, active component metal palladium or its oxide, at least one element selected from IA or IIA in the periodic table or its oxide, at least one element selected from IVA or VA in the periodic table or its oxide Oxide, the specific surface area of ​​the carrier is 40-160 m2/g, the total pore volume is 0.3-1.2 ml/g, and the carrier has a technical solution of composite pore distribution, which solves this problem well and can be used for full-run pyrolysis gasoline In the industrial production of selective hydrogenation.
Owner:CHINA PETROLEUM & CHEM CORP +1

Ternary positive material of core-shell structure lithium ion battery and preparation method thereof

The invention discloses a preparation method of a ternary positive material of a core-shell structure lithium ion battery. The preparation method comprises the following steps: (1) preparing a multi-element mixed solution of nickel salt, cobalt salt, manganese salt and aluminum salt; (2) under a protective atmosphere, adding the multi-element mixed solution, ammonia water and sodium hydroxide intoa reaction device containing a base solution, and carrying out a co-precipitation reaction to obtain an NCM hydroxide precursor; (3) introducing carbon dioxide gas so that an aluminum hydroxide coating layer is formed on the surface of the NCM precursor; and (4) filtering, washing and drying the precursor, and then adding a lithium source to carry out heat treatment so as to obtain an NCM material, wherein the surface of the NCM material is coated with aluminum oxide. The obtained precursor of a core-shell structure is uniform in pore distribution, moderate in interval and large in specific surface area. The positive material of the core-shell structure lithium ion battery is obtained through further treatment of the obtained precursor and the lithium salt, and the positive material has high charge-discharge specific capacity, long cyclic stability performance and good rate capability.
Owner:QINGYUAN JIAZHI NEW MATERIAL RES INST CO LTD +1

Lithium ion secondary battery porous silicon/carbon composite negative electrode material and preparation method thereof

The invention relates to a lithium ion secondary battery porous silicon/carbon composite negative electrode material and a preparation method thereof. The composite material consists of porous silicon, a graphite-like carbon material and an amorphous carbon material. The preparation method comprises the following steps: by taking pyrolytic carbon as a reducing agent, preparing a silicon-aluminum alloy in one step by a mixture of alkali (earth) metal chloride-containing silicon dioxide powder and aluminum oxide powder; carrying acid corrosion and vacuum drying on the silicon-aluminum alloy; mixing the silicon-aluminum alloy and graphite in an organic polymer solution; drying the solvent by distillation; and finally roasting under inert atmosphere at high temperature to obtain the porous silicon/carbon composite material. Through adjusting the silicon-aluminum ratio and the particle size in the silicon-aluminum alloy preparation process, the pore size and the pore distribution in the final porous silicon/carbon material can be controlled. The porous silicon/carbon material provided by the invention has the characteristics of being high in first coulombic efficiency, long in cyclic life and high in capacity. Moreover, the used raw materials are low in cost and environment-friendly; the preparation method is simple in instruments, short in technological process and suitable for industrial production.
Owner:NANKAI UNIV

Shale gas reservoir pore structure quantitative calculation method based on nuclear magnetic resonance

The invention discloses a shale gas reservoir pore structure quantitative calculation method based on nuclear magnetic resonance. The shale gas reservoir pore structure quantitative calculation methodcomprises the following steps: collecting cores; drilling parallel samples, carrying out oil and water self-adsorption nuclear magnetic resonance experiment measurement; contrastively analyzing the difference of a parallel sample oil and water nuclear magnetic resonance T2 spectrum, and determining the distribution of different wetting pore types on the nuclear magnetic resonance T2 spectrum; obtaining a shale gas reservoir full-pore distribution curve according to high-pressure pressurized mercury, nitrogen adsorption and carbon dioxide adsorption; furthermore, obtaining an intersection plate of pore diameters and corresponding T2 time; and according to the intersection plate of different pore types of pore diameters and corresponding T2 time, establishing a quantitative calculation model of the pore diameters according to the pore types. The method has the advantages that a shale gas reservoir pore full-pore distribution curve can be quantitatively calculated through the technology;simultaneously, the nuclear magnetism measurement is quick, simple and loss-free, and is higher in practicability by compared with high-pressure pressurized mercury, nitrogen adsorption and carbon dioxide adsorption; and compared with a conventional method, the calculation result is more accurate.
Owner:SOUTHWEST PETROLEUM UNIV

Method of preparing biomass high specific surface micro-pore carbon material

The present invention belongs to the preparation field of micropore carbon material, and relates to the preparation method for micropore carbon material with high specific surface area and narrow pore distribution by biomass. The biomass is cleaned and cut into subparagraph with a length of 1~3 centimeter, and then is subjected to carbonizing at 300~500 DEG C for 3~4 hours in the presence of inert atmosphere. The obtained carbonizing product is immerged into an alkaline solution for 20~24 hours until the carbonizing product is totally wetting, and then the carbonizing product is separated from the solution and is activated for 1.5~3 hours at 700~800 DEG C in the presence of inert atmosphere, and then is scrubbed by water until the pH value of the scrub solution is 7~8, and then the carbonizing product is immerged into a diluted acid solution for 4~5 hours and is scrubbed by water until the pH value of the scrub solution is 6~7, finally, the carbonizing product is dried at 80~120 DEG C to obtain micropore carbon material. The preparation method for the present invention has the advantages of that the preparation process is simple, the raw material is cheap and abundant, the preparation condition is free from zone limit; besides, the preparation method is adapted to industrial production.
Owner:JILIN UNIV

Morphological filtering-based electrical imaging reservoir fracture and cave body quantitative characterization method and system

The present invention discloses a morphological filtering-based electrical imaging reservoir fracture and cave body quantitative characterization method and system. The method includes the following steps that: 1) noise suppression and blank band encryption interpolation are performed on original electric imaging logging data to obtain full-coverage rate electrical imaging logging data; 2) structural elements of appropriate shapes and scales are selected, and morphological filtering is performed on the obtained electrical imaging logging data in the step 1), so that fracture and cave pore distribution of different scales can be determined; and 3) the proportion of the porosity of fractures and the proportion of the porosity of corroded caves are calculated according to the fracture and cave pore distribution of different scales, so that a fracture and cave porosity spectrum which can indicate pore throat size and porosity distribution relationships can be obtained. According to the method of the invention, a mathematical morphological filtering method is introduced into imaging logging data processing; based on the filtering and anomaly recognition technologies of conductivity signals of different scales, the signal-to-noise ratio and identifiability of fracture and cave abnormal signals are improved; and exact information such as intuitive fracture and cave shapes and scale distribution can be provided for the processing and interpretation of electrical imaging logging data.
Owner:CHINA PETROLEUM & CHEM CORP +4

Efficient ecotype inorganic formaldehyde adsorbing material and preparation method thereof

The invention relates to an efficient ecotype inorganic formaldehyde adsorbing material which is obtained by mixing and curing 50%-75% of a solid raw material containing aluminosilicate, 10-40% of alkaline solution and 10%-15% of a complex reaction activator, wherein the solid raw material containing the aluminosilicate comprises at least one of the following raw materials: clay, kaolin, coal gangue, fly ash, waste incineration ash, slag, red mud and the like; alkali content of the alkaline solution is 3-12mol/L[OH-]; and the complex reaction activator comprises two components at mass ratio of 75-85% of a silicate substance and 15-25% of Al2O3 particle size of which is more than 1000 meshes. The inorganic adsorbing material is of a net porous gel structure, total pore volume is 0.17mL/g-0.36mL/g, specific surface area is 300-650m<2>/g, and pore distribution mainly adopt two modes of micropores (pore diameter is less than 2nm) and mesopores (pore diameter is 2-50nm), wherein the pore volume of the micropores (45%-60%) and the mesopores (25%-50%) accounts for 85%-95% of the total pore volume. The inorganic adsorbing material comprises 80-95% of an amorphous component and 5-20% of a crystal component based on the total mass of the material.
Owner:CHINA UNIV OF MINING & TECH (BEIJING)

Heavy oil hydrogenation protection catalyst, preparation and applications thereof

The present invention relates to a heavy oil hydrogenation protection catalyst, preparation and applications thereof. According to the catalyst, Al2O3 or SiO2-containing Al2O3 is adopted as a carrier; a carrier pore volume is 0.98-1.15 ml/g; a specific surface area is 340-380 m<2>/g; pore distribution is as the follow: the amount of the pore volume of pores with a pore diameter of less than 5 nm is 10-15% of the amount of the total pore volume, the amount of the pore volume of pores with a pore diameter of 5-15 nm is 50-55% of the amount of the total pore volume, and the amount of the pore volume of pores with a pore diameter of more than 15 nm is 25-40% of the amount of the total pore volume; the catalyst is loaded with nickel-molybdenum-sulfur, nickel-tungsten-sulfur, molybdenum sulfide, tungsten sulfide, cobalt-molybdenum-sulfur, cobalt-tungsten-sulfur, nickel-cobalt-molybdenum-sulfur, nickel-cobalt-tungsten-sulfur or cobalt-molybdenum-nickel-tungsten, and the loaded material is combined with Ni2P to form the composite catalyst. The catalyst has characteristics of suitable pore size, high metal melting ability, small active ingredient scale, good dispersity and high catalyst activity, and is suitable for heavy oil and heavy oil protection catalysts.
Owner:PETROCHINA CO LTD
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