30results about How to "High microporous content" patented technology

The present invention is biohaydite filter material and its preparation process and belongs to the field of water treating engineering technology. The biohaydite filter material is prepared with shale 30-40 wt%, fly ash 30-45 wt%, sludge 10-20 wt%, pore creating agent 3-8 wt% and adhesive 0.5-2 wt%. The preparation process includes the steps of mixing material, forming, stoving, roasting, sintering and modifying. The preparation process has great amount of industrial waste utilized and low power consumption, may have microbes immobilized on its surface for biodegradation to result in raised organic matter degrading capacity, and may have its surface modified chemically for positively charging and hydroxylating favorable to eliminate natural organic matter from raw water.

The invention relates to micropore carbofrax fiber and a process for preparation. Micropore carbofrax fiber is characterized in that the content of Si is 40-65 wt%, the content of C is 25-45 wt%, residual material is O, micropore carbofrax fiber takes continuous fibrous shape, the volume of micropore (pore diameter <= 2nm) accounts for more than 85 vol% of total pore volume, average pore size is 1.30-2.00nm, and specific surface area is 1100-2100m 2/g. The process for preparation is characterized in that carbofrax fiber which is rich with C is firstly prepared by blending mixing, non-melting and cracking through poly carbon silicon alky and carbonaceous high polymer, then micropore carbofrax fiber is obtained through activating carbon removing technology. The volume of micropore of micropore carbofrax fiber of the invention has high content, and pore diameter is stable and hard to collapse, and has high specific surface area, high thermally insulating property and good oxidation resistance property, and the invention has good application prospect in the field of environmental control, energy storage, medical health and the like.

The invention discloses a preparation method and application of hypercrosslinked resin with controllable polarity and pore structure. The preparation method of the hypercrosslinked resin comprises the following steps: taking dimethyl acrylate as a crosslinking agent, taking 4-vinyl benzyl chloride as a monomer, carrying out suspension polymerization in the presence of a pore-foaming agent, a dispersant and an initiator to obtain precursor resin; and carrying out Friedel-Crafts reaction on the precursor resin under the catalytic action of lewis acid to obtain the hypercrosslinked resin. By regulating the mass ratio of the crosslinking agent to the monomer, the polarity and the pore structure of the hypercrosslinked resin can be controlled within a certain range; meanwhile, the polarity and the pore structure of the hypercrosslinked resin can be regulated within a proper range; the hypercrosslinked resin can be used for selectively adsorbing polar micromolecule aromatic organic compounds and has a wide application prospect; in addition, the preparation method of the hypercrosslinked resin is simple and is low in cost; the prepared hypercrosslinked resin is excellent in dynamic properties and high in reusability, and is suitable for industrial production.

The invention relates to a preparation method of a carbon-based mercury-removing absorbent. The preparation method includes the steps of A), mixing fly ash with alkaline liquid, and etching to obtain etched fly ash; B), mixing the etched fly ash with metal halide and alkali under an inert gas environment, and activating to obtain activated fly ash, wherein activating temperature is 700-800 DEG C and activating time is 90-120 minutes; C), mixing the activated fly ash with a metal halide solution, and modifying to obtain the carbon-based mercury-removing absorbent. The preparation method has the advantages that the fly ash is subjected to alkaline liquid etching first, the alkali is allowed to react with the carbon of the fly ash, and a large amount of pores exist at etched positions; the specific surface area, micropore contents and functional groups of the fly ash are increased to a large extent by the activating; the surface and inside of the fly ash carry halogen elements through the modification by the metal halide solution, and the mercury-removing ability of the fly ash is further increased.

The invention belongs to the technical field of modification of activated carbon and in particular relates to a preparation method of hydrophilic activated carbon. The preparation method comprises thefollowing steps: step 1, adding sodium polyacrylate into propylene glycol; mechanically stirring until sodium polyacrylate is completely dissolved, so as to obtain a sodium polyacrylate alcohol solution; step 2, adding the activated carbon into the sodium polyacrylate alcohol solution; adding a dispersant and stirring to form stable suspension liquid; step 3, sealing the suspension liquid and stirring and reacting for 2 to 4h; then decompressing and distilling to react for 2 to 4h, so as to obtain pre-prepared activated carbon; step 4, putting the pre-prepared activated carbon into a drying oven and drying in vacuum to obtain the hydrophilic activated carbon. According to the preparation method provided by the invention, a polyacrylate radical is grafted in an activated carbon framework and hydrophilic modification of the activated carbon can be formed; a polyacrylate-activated carbon dual water absorption effect is formed and the hydrophilic performance of the modified activated carbon is greatly improved.

The invention discloses hydrophilic active carbon modified by sodium acetate and a preparation method thereof. The hydrophilic active carbon is formed by loading sodium acetate on the surface of the carbon framework of active carbon. The preparation method comprises the following steps of: sequentially carrying out high-temperature treatment on an active carbon raw material, soaking in a sodium hydroxide solution, drying, activating, soaking in ethyl acetate and carrying out esterolytic reaction, nitrogen purging desorption and vacuum desorption to obtain the hydrophilic active carbon. The preparation method disclosed by the invention has the advantages of easiness for operation and low cost; the prepared hydrophilic active carbon has the advantages of stability in structure, large specific area, less carbon loss, high adsorption capacity and large volume on water vapors, stability in adsorption property and good reusability.

The invention discloses a silica gel preparation method and silica gel obtained by the method, and relates to the technical field of inorganic silica gels. The preparation method sequentially comprises glue preparing, aging, glue cutting, water washing, and drying, wherein washing is performed with magnetized water in the water washing step, the water washing temperature is 20-80 DEG C, and the water washing end point is the rubber particle conductivity of less than 0.5 mS/cm. According to the present invention, the water washing is performed with magnetized water during the preparation of thesilica gel, and the water washing time is shortened to below 40 h so as to save the water washing time of the silica gel and improve the production efficiency of the silica gel; the magnetized waterhas high magnetic property, and can quickly wash out the salt ions in the silica gel so as to reduce the consumption of the magnetized water and reduce the production cost; the silica gel has the specific surface area of 300-800 m<2>/g and the pore volume of 0.4-1.0 mL/g, such that the fine pore channel structure inside the silica gel is protected at a maximum, and the protection of the micro-pores is increased; and the preparation method has good economic benefits, and further has a certain social benefit.

The present invention relates to a porous carbon material SO2 electrochemical oxidation catalyst, a preparation method and applications thereof, specifically to a loose porous metal-free carbon material catalyst obtained by carrying out pretreatment, doping and two heat treatments on an amorphous carbon material. According to the present invention, through a constant potential process and an electrokinetic potential process, the SO2 electrochemical oxidation ability of the prepared catalyst and the in situ response of the catalyst to SO2 during the external applying of the potential are tested, and the testing results show that the catalyst has a significant desulfurization effect; the micro-pore area of the porous carbon material catalyst prepared from the amorphous carbon material is increased by 33-40%, the pore volume of the micro-pores is increased by 28-30%, the area of the outer pore is increased by 55-60%, the total specific surface area is increased by 48-50%, a variety of elements are doped on the surface of the porous carbon material catalyst, and a plurality of functional groups are modified on the surface of the porous carbon material catalyst; and the SO2 electrochemical oxidation effect of the catalyst is good at the constant potential, and the catalyst has great application potential in the gas-phase and liquid-phase SO2 electrochemical oxidation field, and provides the positive significance for the solving of the increasingly severe SO2 pollution problem.

The invention provides a catalyst for treating wastewater as well as a preparation method and application of the catalyst. The preparation method of the catalyst for treating wastewater comprises the following steps of: mixing inorganic silicon-aluminum oxide, activated carbon, organic fiber chopped strands, a binder and water by means of contact, and carrying out forming and drying to obtain a carrier B; and further treating the carrier B with an organic solvent and sodium hydroxide to obtain a composite carrier, then enabling the composite carrier to enter an active component to obtain a catalyst precursor, finally, contacting the catalyst precursor with an organosilane-containing solvent, and performing washing and drying to obtain the catalyst. The catalyst prepared by the preparation method disclosed by the invention has the characteristics of good catalytic performance, strong wear resistance and high activity stability, and is beneficial to improving the removal rate of organic pollutants in wastewater.