77 results about "Mercury intrusion porosimetry" patented technology

A hydrocarbon conversion catalyst contains at least one silica-alumina having the following characteristics: A content by weight of silica SiO2 of between 10 and 60% by weight; an Na content less than 300 ppm by weight; a total pore volume of between 0.5 and 1.2 m / g measured by mercury porosimetry; a porosity of said silica-alumina wherein: the volume of mesopores whose diameter is between 40 Å and 150 Å, and whose mean diameter varies between 80 and 120 Å represents between 30 and 80% of the total pore volume, and (ii) the volume of macropores, whose diameter is greater than 500 Å and preferably between 1000 Å and 10,000 Å represents between 20 and 80% of the total pore volume; a specific surface area greater than 200 m<2> / g, and at least one hydro-dehydrogenating element selected metals of group VIB and group VIII, and optionally phosphorus, boron, silicon, or elements of group VIIA, VIIB or VB.

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 (1) extruding a melt-blend of (a) (i) a polyethylene resin containing 7% or less by mass of ultra-high-molecular-weight polyethylene having a weight-average molecular weight of 1×106 or more, or (ii) a mixture of 75% by mass or more of said polyethylene resin and 25% or less by mass of polypropylene, and (b) a membrane-forming solvent, (2) stretching a gel-like sheet obtained by cooling an extrudate, (3) washing it, (4) stretching the resultant microporous membrane to 1.1-1.8 fold in at least one direction, and (5) heat-setting it at a temperature in a range of the stretching temperature of the microporous membrane plus or minus 5 degrees centigrade.

A honeycomb filter including partition walls having a porous partition wall base material and a surface layer provided on only inflow side or both inflow and outflow sides of the partition wall base material, and satisfying the following conditions capable of using as a DPF. The surface layer has a peak pore diameter of from 0.3 μm to 20 μm (exclusive) being equal to or smaller than the average pore diameter of the base material; the porosity of from 60% to 95% (exclusive) when measured by mercury porosimetry being larger than that of the base material; and the thickness L1 of from 0.5% to 30% (exclusive) of the partition wall thickness L2; and mass per filtration area of from 0.01 mg / cm2 to 6 mg / cm2 (exclusive). The base material has an average pore diameter of from 10 μm to 60 μm (exclusive) and a porosity of from 40% to 65% (exclusive).

Provided herein are a positive electrode for a secondary battery and a secondary battery including the same. The positive electrode includes a positive electrode active material layer including a positive electrode active material, a conductive material, and a dispersant, wherein the conductive material includes bundle-type carbon nanotubes, units of which have an average strand diameter of 15 nm or less, and the positive electrode active material layer has a packing density of 3.0 g / cc or more, and has an average pore diameter of 0.1 μm to 0.5 μm at the packing density when a pore size distribution is measured by mercury intrusion porosimetry, and thus may exhibit excellent electrolyte wetting properties. As a result, when the positive electrode is applied to a battery, wetting time of the positive electrode is shortened, and an area of the positive electrode that is not filled with an electrolyte is reduced, resulting in enhanced battery performance.

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 SA in the range of from 0.005 to 20 micrometer and a total pore volume VA, and comprising pores B having a pore size SB in the range of from more than 20 to 1000 micrometer and a total pore volume VB, wherein the total pore volume of the pores having a pore size in the range of from 0.005 to 1000 micrometer is VC and wherein the ratio RA=VA / VC is in the range of from 0.3 to 0.7 as determined via mercury intrusion porosimetry.

A process for once-through conversion of a hydrocarbon feed comprising at least olefins containing 4 carbon atoms and at least olefins containing 5 carbon atoms is described for the production of propylene, said process comprising passing said feed into at least one reaction unit provided with at least one catalyst in the form of spherical beads with a diameter in the range 1 to 3 mm, each of said spherical beads comprising at least one zeolite and at least one alumina-based support and having a pore distribution such that the macroporous volume, measured by mercury porosimetry, is in the range 0.10 to 0.20 ml / g and the mesoporous volume, measured by mercury porosimetry, is in the range 0.25 to 0.35 ml / g.

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 hydrogenation pretreatment method for catalytically-cracked raw oil comprises enabling raw oil to be contacted with a catalyst combination under the conditions of a hydrogenation processing reaction. The catalyst combination comprises a hydrogenation processing catalyst I and a hydrogenation processing catalyst II, and the hydrogenation processing catalyst I and the hydrogenation processing catalyst II in the catalyst combination are arranged to enable raw oil to be successively contacted with the catalyst I and the catalyst II. Based on the total amount by volume of the catalyst combination, the content of the catalyst I is 5-40%, and the content of the catalyst II is 60-95%. The catalyst I contains a boron-containing aluminium oxide carrier with a double-peak pore structure, and characterized by 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 volume.