77 results about "Mercury intrusion porosimetry" patented technology

There is provided a powder of a lithium transition-metal compound for a positive-electrode material in a lithium secondary battery, in which the use of the powder as that of a positive-electrode material in a lithium secondary battery achieves a good balance among improvement in battery performance, cost reduction, resistance to a higher voltage, and a higher level of safety. The powder of the lithium transition-metal compound for a positive-electrode material in a lithium secondary battery is characterized in that in a mercury intrusion curve obtained by mercury intrusion porosimetry, the amount of mercury intruded is in the range of 0.8 cm³/g to 3 cm³/g when the pressure is increased from 3.86 kPa to 413 MPa.

An excellent positive electrode material for a lithium secondary battery is provided that can increase low-temperature load characteristics of the battery as well as improving coatability. When measured by mercury intrusion porosimetry, the material meets Condition (A) and at least either Condition (B) or Condition (C).

Condition (A) : on a mercury intrusion curve, the mercury intrusion volume from 50 MPa to 150 MPa is 0.02 cm³/g or smaller.

Condition (B): on the mercury intrusion curve, the mercury intrusion volume from 50 MPa to 150 MPa is 0.01 cm³/g or larger. Condition (C): the average pore radius is within 10-100 nm, and the pore-size distribution curve has a main peak (with peak top at a pore radius of within 0.5-50 μm) and a sub peak (with peak top at a pore radius of within 80-300 nm).

An object of the present invention is to provide a separator for a nonaqueous secondary battery having excellent heat resistance and excellent ion permeation as well as shut-down properties. The first invention is a separator for a nonaqueous secondary battery, comprising a porous composite membrane which includes a substrate comprising a polyolefin microporous membrane and a heat-resistant porous layer comprising a heat-resistant resin, the heat-resistant porous layer being formed on at least one surface of the substrate, wherein the separator is characterized in that the sheet resistance (A) of the substrate, the Gurley value (B) of the substrate, the sheet resistance (C) of the porous composite membrane, and the Gurley value (D) of the porous composite membrane satisfy a specific relationship. The second invention is characterized in that the heat-resistant porous layer has an average pore size of 0.1 to 0.2 μm as measured by mercury intrusion porosimetry. The third invention is characterized in that the heat-resistant resin fibrils have an average fibril diameter of 10 to 80 nm, and the pores in the heat-resistant porous layer have an average pore size of 50 to 250 nm.

A microporous polyolefin membrane having a structure in which its pore size distribution curve obtained by mercury intrusion porosimetry has at least two peaks, which is produced by extruding a melt-blend of a polyolefin composition comprising (a) high density polyethylene resin having a weight average molecular weight of from about 2.5×10⁵ to about 5×10⁵ and a molecular weight distribution of from about 5 to about 100, (b) polypropylene resin having a weight average molecular weight of from about 3×10⁵ to about 1.5×10⁶ and a molecular weight distribution of from about 1 to about 100, and (c) ultra-high molecular weight polyethylene resin having a weight average molecular weight of about 5×10⁵ or higher, and a membrane-forming solvent, cooling the extrudate to form a high resin content gel-like sheet, stretching the gel-like sheet at a high stretching temperature to form a stretched gel-like sheet, removing the membrane-forming solvent from the stretched gel-like sheet to form a membrane, stretching the membrane to a high magnification to form a stretched membrane, and heat-setting the stretched microporous membrane to form the microporous membrane.

The invention provides a high-specific-area white carbon black and a production method thereof. The SBET of the white carbon black is 200-450 m<2>/g, the SBET/SCTAB is less than or equal to 1.2, and the total volume of pores with the diameter of 100-30nm is 40% greater than the total volume of pores with the diameter of less than or equal to 50nm when a mercury intrusion process is used for measuring pore size distribution. The high-specific-area white carbon black has high specific area and porous structure, so that the prepared rubber product has the advantages of favorable wear resistance, favorable tensile strength at break and the like.

The invention relates to a polyolefin composition. The polyolefin composition can be in the form of a multi-layer, microporous polyolefin membrane comprising a first microporous layer containing 7% or less by mass of ultra-high-molecular-weight polyethylene having a weight-average molecular weight of 1×10⁶ or more, and having a structure in which a pore size distribution curve obtained by mercury intrusion porosimetry has at least two peaks, and a second microporous layer containing 8% or more by mass of the ultra-high-molecular-weight polyethylene.

The invention discloses a selective hydrodesulfurization catalyst, and preparation and application thereof. The catalyst comprises a carrier, at least one non-noble metal composition selected from group VIII and supported on the carrier, at least one metal composition selected from group VI B, and one or more of organics selected from alcohols, organic acids and organic amines. Based on the catalyst in terms of oxides, the mass fraction of the group VIII metal composition is 0.1-6%, the mass fraction of the group VI B metal composition is 1-25%, and the molar ratio of the organic to the group VIII metal composition is 0.5-2.5. The carrier is double-peak porous aluminium oxide, and characterized by mercury intrusion porosimetry, the carrier has the pore volume of 0.9-1.2 mL/g and the specific surface area of 50-300 m<2>/g, the pore volume of pores with the diameter of 10-30 nm accounts for 55-80% of the total pore volume, and the pore volume of pores with the diameter of 300-500 nm accounts for 10-35% of the total pore volume. Compared with the prior art, the provided catalyst is especially applied to hydrofining processes of coked gasoline and catalytically-cracked gasoline.

The present invention relates to a porous inorganic body comprising pores A having a pore size S_A in the range of from 0.005 to 20 micrometer and a total pore volume V_A, and comprising pores B having a pore size S_B in the range of from more than 20 to 1000 micrometer and a total pore volume V_B, wherein the total pore volume of the pores having a pore size in the range of from 0.005 to 1000 micrometer is V_C and wherein the ratio R_A=V_A/V_C is in the range of from 0.3 to 0.7 as determined via mercury intrusion porosimetry.

A microporous membrane having a structure in which its pore size distribution curve obtained by mercury intrusion porosimetry has at least two peaks, which is produced by extruding a combination of a diluent or solvent and a polyolefin resin composition comprising from about 75 to about 99% of a polyethylene resin having a weight average molecular weight of from about 2.5×10⁵ to about 5×10⁵ and a molecular weight distribution of from about 10 to about 100, and from about 1 to about 25% polypropylene resin having a weight average molecular weight of from about 1×10⁴ to about 4×10⁶, a heat of fusion of 80 J/g or higher, and a molecular weight distribution of from about 1 to about 100, percentages based on the mass of the polyolefin composition; cooling the extrudate to form a high polyolefin content cooled extrudate; stretching the cooled extrudate at a high stretching temperature to form a stretched sheet; removing the diluent or solvent from the stretched sheet to form a membrane; stretching the membrane to a high magnification in at least one direction to form a stretched membrane; and heat-setting the stretched membrane to form the microporous membrane.

A honeycomb filter includes partition walls forming a plurality of cells extending in one direction, and plugging sections alternately plugging the cells at the ends of the honeycomb filter, the partition walls being formed of a porous base material having a porosity of 45 to 70%. When the average pore size of the base material measured by mercury porosimetry is (A) μm and the average pore size of the base material measured by a bubble point method is (B) μm, the average pore size differential rate expressed by “{(A−B)/B}*100” is 35% or less, and the maximum pore size of the base material measured by the bubble point method is 150 μm or less.

The invention discloses a heavy-oil hydrotreatment catalyst, and preparation and application thereof. The catalyst comprises an aluminium oxide carrier and a hydrogenation active metal composition. The carrier has a double-peak pore structure, and characterized by mercury intrusion porosimetry, the carrier has the pore volume larger than 0.4 mL/g and less than 0.8 mL/g and the specific surface area of 100-400 m<2>/g, the pore volume of pores with the diameter of 6-20 nm accounts for 60-90% of the total pore volume, and the pore volume of pores with the diameter of 100-300 nm accounts for 3-20% of the total pore volume. Compared with the prior art, the provided catalyst has relatively good hydrodesulfurization performance when being applied to residuum hydrotreatment.

The invention discloses a method for quantitative evaluation of characteristics of a micro-pore structure of a deeply-buried high-pressure low-permeability sandstone reservoir stratum. The method comprises the following steps of: measuring the porosity and permeability of a standard rock core after oil washing and drying; vacuumizing a small rock sample cut from a plunger rock sample, and soaking the small rock sample in a mercury solution; injecting mercury into the rock core at a constant speed of 0.00005mL/min, and ending the experiment when the pressure reaches a highest value 900psi for a constant speed mercury injection apparatus; while the mercury is injected, performing real-time monitoring and automatic data acquisition and output by virtue of a computer; performing a high-pressure mercury injection experiment by using a standard plunger rock sample from a same stratum; and finally, taking a product of an efficiency of mercury ejection (EW) and the saturation degree of mercury ejection (SE) as a parameter index for classified evaluation of the micro-pore structure of the reservoir stratum, namely a comprehensive evaluation parameter E (E=EW*SE) of the micro-pore structure of the reservoir stratum, and judging the characteristics of the micro-pore structure according to distribution of E. According to the method disclosed by the invention, a relative accurate pore throat characteristic parameter is obtained by virtue of an experiment, and the defects of analysis with application of two mercury injection methods respectively are overcome.

A microporous membrane having a structure in which its pore size distribution curve obtained by mercury intrusion porosimetry has at least two peaks, which is produced by extruding a combination of a diluent or solvent and a polyolefin resin composition comprising (a) from about 74 to about 99% of a first polyethylene resin having a weight average molecular weight of from about 2.5×10⁵ to about 5×10⁵ and a molecular weight distribution of from about 5 to about 100, (b) from about 1 to about 5% of a second polyethylene resin having a weight average molecular weight of from about 5×10⁵ to about 1×10⁶ and a molecular weight distribution of from about 5 to about 100, and (c) from 0 to about 25% of a polypropylene resin having a weight average molecular weight of from about 3×10⁵ to about 1.5×10⁶, a molecular weight distribution of from about 1 to about 100, and a heat of fusion of 80 J/g or higher, percentages based on the mass of the polyolefin composition; cooling the extrudate to form a high polyolefin content cooled extrudate; stretching the cooled extrudate in at least one direction at a high stretching temperature to form a stretched sheet; removing at least a portion of the diluent or solvent from the stretched sheet to form a membrane; stretching the membrane to a high magnification in at least one direction to form a stretched membrane; and heat-setting the stretched membrane to form the microporous membrane.

The invention discloses an electrode plate porosity measurement and calculation method, which includes the following steps: materials are first chosen to prepare paste; paste density and paste solid content are measured; according to the paste density, paste solid content and the density of the chosen solvent, comprehensive true density is worked out; according to compaction density needed by an electrode plate, the paste is utilized to be applied on the surface of the electrode plate, and the surface of the electrode plate is compacted; and according to the compaction density and the comprehensive true density, the porosity of the electrode plate is worked out. The electrode plate porosity measurement and calculation method provided by the invention is efficient and effective, and can carry out data acquisition and calculation in the process of battery production without requiring a separate experiment; moreover, such a measurement and calculation method overcomes the problems of overhigh cost, menace engendered to the health of testers, difficulty in waste mercury treatment and great test errors existing in mercury intrusion porosimetry; and such a measurement and calculation method has guiding significance for both battery design and technological parameter optimization.

The invention relates to a heavy oil hydrogenation diasphaltene catalyst, and a preparation method and an application thereof. The catalyst comprises a carrier and hydrogenation active metal components. The hydrogenation active metal components are selected from at least one VIB-family metal component and at least one VB-family metal component. The carrier is a bimodal pore alumina carrier comprising an IVB-family metal component. Characterized by mercury intrusion porosimetry, the carrier has pore volume of 0.6-1.4 ml/g, and specific surface area of 80-400 m<2>/g. The pore volume of pores with diameters of 5-20nm accounts for 30-60% of the total pore volume. The pore volume of pores with diameters of 100-300nm accounts for 15-45% of the total pore volume. Compared with prior arts, when the catalyst provided by the invention is used in residual oil hydrogenation treatment, the catalyst has better hydrogenation diasphaltene and demetalization performances.

A resilient resorbable chemically crosslinked collagen sponge for promoting soft tissue volume augmentation in the oral region, comprising 60-96% (w/w) collagen and 4-40% (w/w) elastin, which shows by mercury intrusion porosimetry interconnected pores with a median pore diameter between 50 and 90 μm and at least 80% porosity with a pore diameter more than 10 μm, an onset temperature of 45 to 57° C. and a density in dry state from 50 to 65 mg/cm³. A process for preparing a resilient resorbable chemically crosslinked collagen sponge. A method of using a resilient resorbable chemically crosslinked collagen sponge as an implant in the oral cavity for soft tissue volume augmentation.

Water dispersible or water soluble porous bodies comprising a three dimensional open-cell lattice containing 10 to 95% by weight of a polymeric material which is soluble in water, and, less than 5% by weight of a surfactant, said porous bodies having an intrusion volume as measured by mercury porosimetry (as hereinafter described) of at least about 3 ml/g, and, with the proviso that said porous bodies are not spherical beads having an average bead diameter of 0.2 to 5 mm. And a method for making the same comprising the steps of: providing an intimate mixture of the polymeric material and any surfactant in a liquid medium: providing a fluid freezing medium at a temperature effective for rapidly freezing the liquid medium; cooling the liquid medium with the fluid freezing medium at a temperature below the freezing point of the liquid medium for a period effective to rapidly freeze the liquid medium; and freeze-drying the frozen liquid medium to form the porous bodies by removal of the liquid medium by sublimation.

A hydrocarbon-oil hydrotreatment method comprises contacting raw oil with a catalyst combination under hydrotreatment reaction conditions. The catalyst combination comprises a hdyrotreatment catalyst I and a hydrotreatment catalyst II, and the arrangement of the catalyst I and the catalyst II enables raw oil to be successively contacted with the catalyst I and the catalyst II. Based on the total amount of the catalyst combination in terms of volume, the content of the catalyst I is 5-40% and the content of the catalyst II is 60-95%. The catalyst I contains an aluminium oxide carrier with a double-peak pore structure, and mercury intrusion porosimetry, the carrier has the pore volume of 0.8-1.2 mL/g and the specific surface area of 120-400 m<2>/g, the pore volume of pores with the diameter of 6-30 nm accounts for 58-80% of the total pore volume, the pore volume of pores with the diameter of 10-30 nm is less than 55% of the total pore volume, and the pore volume of pores with the diameter of 300-500 nm accounts for 10-35% of the total pore volume.

The present invention relates to lithium manganate particles for non-aqueous electrolyte secondary batteries, having a spinel structure, an average primary particle diameter of 0.4 to 1.8 μm and an average secondary particle diameter (D50) of 8 to 20 μm, a ratio of the average secondary particle diameter (D50) to the average primary particle diameter (D50/average primary particle diameter) being in the range of 10 to 30, and pore diameters of pores in the lithium manganate particles as measured by a mercury intrusion porosimetry method being in the range of 100 to 500 nm, and a process for producing the lithium manganate particles, and a non-aqueous electrolyte secondary battery. The lithium manganate particles according to the present invention are excellent in high-temperature storage characteristics.