25 results about "Porosity" patented technology

In on aspect, the invention includes a microcarrier bead having a porous three-dimensional core having (a) a polymeric porous three-dimensional body having porosity of about 15 to about 90% such that at least 99% of pores are interconnected and have diameters of at most 200 microns, (b) an outer protective layer and optionally (c) a filler. In another aspect, the invention includes a method of making an artificial scaffold wherein a scaffolding material is extruded into a coolant and thereby creating a porous material having a porosity of between 15-90% such that at least 99% of pores are interconnected and have diameters of at most 200 microns.

This invention relates to the synthesis of large pore composite molecular sieves and to the synthetic large pore composite molecular sieves so produced. The molecular sieves of the invention have the same general utilities of the comparable molecular sieves of the prior art but have been found to be superior catalysts and absorbents. This invention relates to a hydrothermal synthesis of large pore molecular sieves from nutrients, at least one of which contains an amorphous framework-structure, and which framework-structure is essentially retained in the synthetic molecular sieve. This invention stems from a discovery that the intrinsic porosity characteristics of a nutrient that possesses an amorphous cation oxide-framework can be substantially retained in the final molecular sieve containing product formed by a hydrothermal process by carefully controlling the conditions under which the hydrothermal process is conducted. For example, the invention contemplates retention of the particle size in a final molecular sieve-containing product that corresponds with that of an amorphous cation oxide-framework nutrient used in its manufacture. This invention drives the selection of process conditions to achieve one or more of macro and meso porosity ("large pore composite porosity") in the final molecular sieve product as a direct product of the hydrothermal reaction producing the molecular sieve. The invention allows the production of a molecular sieve that is in situ incorporated in the framework morphology of a solid cation oxide-framework used in the molecular sieve's manufacture.

The invention relates to a method for producing energy-saving sintered bricks from mud. The sintered brick is made from river mud, municipal sludge and sea mud as raw material, by mixing with silica-based inorganic binder at a certain proportion, ageing, extruding with a extrusion molding machine to obtain blanks, cutting the blanks with a cutter, drying, sintering and burning. The invention makes full use of mud and the additional amount of mud is high up to 50%. The invention realizes energy and resource conservation and helps develop the circular economy and realize the comprehensive utilization of resources. The produced energy-saving sintered brick has the advantages of high porosity and good heat-insulation effect. During the sintering process, the flue gas is circularly treated, the exhaust gas is treated with acidic and alkaline solutions to remove harmful substances (such as dioxin) from the exhaust gas, and harmful substances such as heavy metals are solidified, therefore, the whole production process and the final product do not cause environmental pollution or hazard.

The invention provides a method of forming a dense, shaped article, such as a crucible, formed of a refractory material, the method comprising the steps of placing a refractory material having a melting point of at least about 2900° C. in a mold configured to form the powder into an approximation of the desired shape. The mold containing the powder is treated at a temperature and pressure sufficient to form a shape-sustaining molded powder that conforms to the shape of the mold, wherein the treating step involves sintering or isostatic pressing. The shape-sustaining molded powder can be machined into the final desired shap and then sintered at a temperature and for a time sufficient to produce a dense, shaped article having a density of greater than about 90% and very low open porosity. Preferred refractory materials include tantalum carbide and niobium carbide.

The invention discloses a coproduction method of 1, 2-propanediamine and dimethyl piperazine, which comprises the following steps of: mixing ammonia and isopropanol amine, pre-heating for vaporization, filling steam into a fixed-bed reactor, performing reaction in the presence of a catalyst for condensation and amination and under conditions with the pressure of 1.0MPa to 4.0MPa, the temperature of 300 DEG C to 350 DEG C and the contact time of 1.0-3.0s to obtain product stream of 1, 2-propanediamine, 2, 5-dimethyl piperazine, 2, 6-dimethyl piperazine, unreacted ammonia and unreacted isopropanol amine, and distilling the product stream for separation to obtain the 1, 2-propanediamine, 2, 5-dimethyl piperazine and 2, 6-dimethyl piperazine; wherein the weight ratio of the ammonia and the isopropanol amin is (10-16):1, and the catalyst for condensation and amination comprises the following ingredients by weight percentage: 97-99 percent of HZSM-5 (H-type zeolite sieve of molecular porosity 5) zeolite and 1-3 percent of phosphorus. The coproduction method is mainly applied in preparation of the 1, 2-propanediamine and the dimethyl piperazine.

The invention discloses a preparation method of a MnZn (Manganese-Zinc) soft magnetic ferrite material containing modified nanoscale titanium dioxide. The preparation method comprises the following steps of: preparing main materials, preparing auxiliary materials, pre-burning, mixing and secondarily ball-milling the main materials and the auxiliary materials, shaping and sintering to obtain a MnZn soft magnetic ferrite magnetic core of modified nanoscale titanium dioxide. Through the addition of the modified nanoscale titanium dioxide, the MnZn soft magnetic ferrite material can play a bridge combination role among different raw materials; the used raw materials have the advantages of better distribution, high density, high grain boundary resistivity, low porosity and great and even grains; the prescription of the raw materials is reasonably improved, so that the magnetic core has higher magnetic conductivity after firing; and the indexes such as power loss, frequency feature, curie temperature, saturation flux density and the like are greatly improved.

The invention discloses porous modified bentonite with foaming effect. The porous modified bentonite is characterized by being prepared from the following raw materials by weight: 85 to 90 parts of calcium bentonite, 1 to 2 parts of octadecyl trimethyl ammonium chloride, 1 to 2 parts of ammonium bicarbonate, 3 to 5 parts of activated carbon powder, 2 to 3 parts of sodium silicate, 0.8 to 1.3 parts of aminopropyltriethoxysilane, 2 to 2.5 parts of carboxymethyl cellulose, 5 to 7 parts of phenolic resin powder, 2 to 3 parts of crushed phoenix tree leaves and 3 to 4 parts of modified diatomite. According to the invention, a formula is reasonable; since bentonite is modified by adding foaming matters like ammonium bicarbonate and activated carbon powder and surfactants like octadecyl trimethyl ammonium chloride, the modified bentonite has porosity, so good adsorption effect is obtained; moreover, through good dispersion of the modified bentonite and the crushed phoenix tree leaves, the porous modified bentonite in the invention is porous and uniform in dispersion and is applicable as a water purification adsorbent, etc.

The invention provides graphene-based hierarchical pore capacitor carbon and a preparation method thereof. The preparation method comprises the following steps: water-soluble sugar and a graphenes substance are subjected to a hydro-thermal reaction, a cross-linking agent is added during a reaction process, an activator is added after the reaction is complete, and then the materials are subjected to a carbonization reaction to obtain the product. The cross-linking agent is a nitrogenous foaming agent, and the activator is selected from one or more of potassium hydroxide, sodium hydroxide, zinc chloride and phosphoric acid. According to the invention, stacking and agglomeration of the graphene can be inhibited with a larger degree, the specific surface area and amount of porosity are increased, and the specific surface area utilization rate and specific capacitance are increased.

The invention discloses a method for making a coated filter cloth through a wet process. A technical scheme adopted in the invention is characterized in that the method comprises the following steps: calendering the coated surface of a filter cloth, coating or dip-coating the calendered surface of the filter cloth with a coating agent of an organic polymer material having the advantages of high porosity, smooth surface, good elasticity and good wear resistance through a coating or dipping device, immersing the coating agent coated filter cloth in a coagulation bath, controlling and adjusting the temperature of the coagulation bath and the detention time in order to realize required porosity and film layer thickness, washing with water, and drying. The obtained coated filter cloth changes deep filtration to surface layer filtration, so a filtered material does not aggregate in the apertures between yarns of the filter cloth, the obstruction of the filtered material in the apertures of the filter cloth is avoided, the possibility of the obstruction of the filter cloth by the filtered material is greatly reduced, the filtering efficiency is improved, the energy consumption of a filtering system is reduced, the filter cloth obstruction is reduced, the service life of the filter cloth is prolonged, and the production cost is reduced.

The invention provides a foaming-ceramic heat insulating board. The foaming-ceramic heat insulating board is characterized by being prepared from, by weight, 25-30 parts of fusible clay, 6-12 parts of diatomaceous earth, 6-12 parts of alkalifeldspar, 5-10 parts of dolomite, 2-5 parts of starch, 6-12 parts of nano-scale silica fume, 6-12 parts of cement, 6-12 parts of lime, 1-2 parts of anionic surfactant, 0.5-3 parts of foaming agent, 1-4 parts of reinforcing elements, 0.1-0.5 part of triton X-100 and 100-190 parts of water; the reinforcing elements are titanium-system reinforcements or aluminum-system reinforcements or boron-system reinforcements or silicon-system reinforcements. The foaming-ceramic heat insulating board is low in heat conductivity coefficient, high in breaking strength, low in density and not prone to water permeation, and can be widely used for wall materials, heat insulating materials and underground engineering materials. As the triton X-100, the anionic surfactant and the starch are combined to be used, the porosity rate of the board is increased, and bubbles can be more evenly distributed.

The invention discloses a method for preparing silicon nitride powder with saw dust, comprising the steps of: taking saw dust and silica sol as raw materials; sufficiently using the characteristics such as the porosity, the easy impregnating and the high-temperature carbonizing of the saw dust, and the easy grinding of the produced saw dust; drawing inorganic substance into the saw dust by means of sol-gel; filling the gel which takes silicon dioxide as main component into gaps of woods, so that the raw materials are evenly mixed; carbonizing, carbon thermally reducing and nitriding silica sol-impregnated saw dust in a high-temperature controllable atmosphere furnace to prepare Si3N4 ceramics powder. The method is characterized of obtaining the Si3N4 ceramics powder with higher purity, high alpha phase content and small grain diameter, and marrow granularity distribution range; preparing the high-quality Si3N4 ceramics powder with a technology with lower cost; reasonably and sufficiently utilizing the saw dust; and recycling waste material. The method is experimentally tested to have good performance for synthesizing the silicon nitride powder, and be an effective and feasible way.

A tissue engineering scaffold of interconnected and bonded fiber having a property with a value that is spatially distributed in at least two regions is provided. The scaffold has at least two regions with properties, such as porosity, strength, elastic modulus, osteoconductivity, and bioactivity that can be controlled and modified through fabrication processes that alter the pore size, pore size distribution, composition, and bonding of fiber and other additives. The value of the property can be provided with a gradient between each of the adjacent spatially distributed regions.

The invention provides a planting red soil improving method, which is characterized in that after red soil in a fixed planting pit is taken out, the following ingredients including 55 to 65 parts of red soil, 15 to 20 parts of dolomite, 5 to 10 parts of dolomite ash,15 to 25 parts of humus soil and 1 to 3 parts of bio-organic fertilizers are mixed in parts by weight to obtain improved soil; then, bio-organic fertilizers are laid on the bottom of the fixed planting pit; the laying thickness is controlled to be 1 to 2cm; then, the improved soil is filled back into the fixed planting pit; plants can be planted. The viscosity of the planting red soil is improved; the porosity of the planting red soil is improved; the acidity-basicity of the planting red soil balanced; meanwhile, the organic matter in the planting red soil can be increased. In addition, a proper amount of humus soil and few bio-organic fertilizers are added into the planting red soil; the fertility of the planting red soil can be improved, so that the pH value, the water content and the organic matter content in the planting red soil are increased; the acidity is reduced; the soil hardening is effectively prevented; the growth and the development of plants are promoted; meanwhile, economic performance and practicability are realized; the operation and the control are easy.

The invention provides a preparation method for preparing a nylon porous material on a large scale. The preparation method is characterized in that the selected raw material is nylon, the preparation process is simple and efficient, water in the production process can be repeatedly utilized, and the preparation method conforms to the environment-friendly concept. The nylon is dissolved by using anhydrous formic acid, and a sodium bicarbonate solution is added for foaming to obtain the porous material which is of a three-dimensional porous structure and has excellent performance. The prepared nylon porous material has the advantages of being low in density, high in porosity, low in heat conductivity, high in specific surface area and the like. Compared with aerogel and other porous materials, the preparation method for preparing the porous material is simple, and low-cost large-scale production can be achieved. The method can be used in heat preservation, heat insulation, marine petroleum pollution treatment, catalyst carriers, sound absorption and shock absorption buffer materials and other fields, and has wide application prospects.

The invention relates to a composite microsphere with a radial fibrous mesoporous shell layer/hollow nuclear layer structure and a preparation method of the composite microsphere. The composite microsphere is provided with a cavity, a nuclear layer and a mesoporous shell layer, wherein the mesoporous shell layer is provided with radial fibrous mesoporous channels. The composite microsphere is highin sphericity and surface regularity, uniform in particle size distribution and high in monodispersity and strength. The preparation method of the composite microsphere is simple and feasible and facilitates industrialization; preparation of the radial fibrous mesoporous shell layer and removal of an organic template can be completed by means of a one-step method. The composite microsphere has the advantages of high light scattering efficiency, large specific surface area, low density, high porosity and the like, can be widely applied in light diffusion materials and used as a light diffusionagent for heavy haze and can also be adopted in the fields of fillers of coatings, cosmetics, catalysts and water treatment.

An installation tool and method are provided to apply a patch to a structure while controlling the porosity in the bond line. An installation tool is provided that includes a frame defining an internal cavity. The installation tool also includes a flexible membrane that divides the internal cavity into a first chamber proximate the surface and a second chamber separated from the surface by the first chamber and the flexible membrane. The flexible membrane is releasably attached to the patch such that the patch faces the surface. The frame includes first and second vacuum ports into the first and second chambers, respectively, such that pressure therewithin is separately controllable. The pressure within the first and second chambers is controlled such that the adhesive is degassed while the patch remains spaced from the surface and the flexible membrane is thereafter caused to be stretched to urge the patch toward the surface.

A method for detecting the penetration type water vapor diffusion coefficient of a large-thickness low-porosity asphalt mixture is disclosed. The method includes molding a large-thickness close-gradedcylinder asphalt mixture test piece to be detected; adding a proper amount of distilled water controlling 100% relative humidity in an opened glass container into the container to prepare a water vapor diffusion device; putting the device into a vacuum drying oven capable of controlling a constant temperature, with P2O5 being disposed in the oven to provide stable humidity in the oven; vacuumizing the vacuum drying oven according to a set negative pressure by utilizing a vacuum pump; weighing everyday and recording the reduced mass of the device, namely the mass of water vapor penetrating theasphalt mixture; and calculating the vapor diffusion coefficient at the specific temperature and in the relative humidity gradient according to an equation. The method can achieve testing of the penetration type water vapor diffusion coefficient of the asphalt mixture at specific temperature in relative humidity gradient and under different negative pressures, significantly shortens testing time,and increases the efficiency. A test material is simple to prepare, the test method is simple and convenient to operate and testing precision is high.

A catalyst component comprising Ti, Mg, Cl, and an electron donor compound having porosity of at least 0.2 cm³/g and characterized by the fact that it further comprises Cu oxide, with the proviso that when the electron donor compound is selected from esters of phthalic acids, the porosity is of at least 0.45 cm³/g.

The invention discloses a gas-solid separation ceramic material and a preparation method thereof. The ceramic material has low mean density, high porosity and good high temperature and acid and alkali resistance, is simple to shape, has low filtration resistance and high filtration efficiency when in use, can undergo pulse jet cleaning, has good reproducibility, has relatively small resistance amplification after pulse jet cleaning, and has excellent comprehensive properties.

The invention discloses a high-pressure helium shale porosity testing device and method. The high-pressure helium shale porosity testing device comprises a reference cylinder, a pressure cylinder, a sample cylinder, a differential pressure sensor, a pressure gauge, an emptying vacuum-pumping system, a temperature control system and a pipe valve system, the reference cylinder is respectively connected with a helium source, the pressure cylinder and the sample cylinder through a pipe valve system, the differential pressure sensor is arranged at the position of the sample cylinder, the pressure gauge is arranged at the position of the pressure cylinder, the sample cylinder is further connected with the emptying vacuum-pumping system through the pipe valve system, The temperature control system is used for controlling the temperature of the whole device; according to the invention, the high-precision differential pressure sensor is used for directly measuring the change of small differential pressure, and the real gas characteristics of helium under high pressure are considered during calculation, so that the testing precision of the porosity under high pressure is comprehensively improved. The sample used in the experiment can be a columnar sample or a rock debris or powder sample.