21results about How to "Solve environmental pollution" patented technology

The invention discloses a method for preparing a C / C-SiC composite material through multi-stage recovery of carbon / carbon composite material processing waste, and belongs to the technical field of C / C composite material preparation. The method comprises the following steps: carrying out multi-stage screening treatment on the carbon / carbon composite material processing waste, and screening and separating short carbon fibers and pyrolytic carbon powder; mixing the screened short carbon fibers and pyrolytic carbon powder with phenolic resin, industrial silicon powder and SiC powder, and preparing a fiber reinforced resin block in a mold pressing manner; and carrying out one-step continuous carbonization and ceramic heat treatment on the fiber reinforced resin block to finally obtain the C / C-SiC composite material. According to the method, high-added-value recycling of the C / C processing waste is achieved, the process is simple, the cost is low, operation is convenient and fast, the problems of resource waste and environmental pollution caused by existing waste treatment are solved, and the prepared C / C-SiC composite material is excellent in performance and can be widely applied to the fields of aerospace, high-end manufacturing and the like.

The application belongs to the technical field of natural substance separation and extraction, and particularly relates to a kind of Haematococcus pluvialis multi-product cascade separation method based on eutectic solvent sequential extraction and enzyme membrane reactor coupling, comprising the following steps: (1) cell wall weakening pretreatment step; (2) water-soluble component extraction step; (3) pigment component extraction step; (4) astaxanthin extraction step; (5) enzyme conversion step. Through the synergistic effect of eutectic solvent sequential extraction and enzyme membrane reactor, efficient, green and continuous cascade separation of water-soluble components, pigments, astaxanthin and xylo-oligosaccharides in Haematococcus pluvialis is realized, and product purity and resource utilization are improved.

The application discloses a kind of Pt nanoparticle load Fe-based MOF photocatalyst and its preparation method and application, belong to environmental energy technical field.The preparation method disclosed in the application uses 2-amino terephthalic acid, FeCl3·6H2O and aqueous solution of chloroplatinic acid hexahydrate as raw material, through hydrothermal reaction, Pt nanoparticle is dispersed in situ and loaded NH2-MIL-101 (Fe), reduces interface charge transfer resistance, inhibits the recombination of photo-generated carriers, to further improve the photocatalytic nitrogen fixation activity, using the synergistic effect of NH2-MIL-101 (Fe) composite photocatalyst containing Pt nanoparticle to achieve the purpose of improving the yield of photocatalytic conversion of nitrogen to ammonia, significantly solve the high energy consumption and environmental pollution problem of traditional industrial nitrogen fixation Haber-Bosch method.

This invention relates to the field of zeolite molecular sieve production technology, specifically a method for in-situ crystallization synthesis of zeolite molecular sieves from solid waste coal gangue. The steps are as follows: Coal gangue is calcined at 600-800℃ for 1-5 hours to obtain calcined coal gangue; it is mixed with acid and water at a ratio of 1:(0.1-0.5):(4-8), reacted at 65-95℃ for 1-5 hours, and the pH is adjusted to 7-10 with alkali. After aging, it is filtered, washed, and dried to obtain activated coal gangue; the activated coal gangue is mixed with externally sourced materials, template agent, solid seed crystals (crystallinity ≥85%), and water in a specific ratio, crystallized at 100-200℃ for 24-72 hours, and calcined to obtain SAPO-34, SSZ-13, or AlPO. 4 -5. Adding ammonium salts via ion exchange can produce MTO catalysts. This invention improves the crystallinity of molecular sieves, resulting in a methanol conversion rate of ≥96% for the MTO catalyst, enabling the resource utilization of coal gangue, reducing costs, and providing a versatile process suitable for industrial application.

This invention belongs to the field of industrial solid waste resource utilization and inorganic material preparation technology, specifically relating to a coupled method and system for preparing jade core stone from gypsum waste residue and producing sulfuric acid as a byproduct. The coupled method includes: drying the gypsum waste residue in a first drying device to obtain semi-dry gypsum waste residue, then drying the semi-dry gypsum waste residue in a second drying device to obtain anhydrous gypsum raw material; mixing and grinding the anhydrous gypsum with pre-set auxiliary materials, and then processing it through a melting furnace roasting device, a calendering device, and a segmented crystallization annealing device to prepare jade core stone products, wherein the waste heat from the melting furnace roasting device, the calendering device, and the segmented crystallization annealing device is all returned to the second drying device; during the calcination of the anhydrous gypsum mixed and ground with pre-set auxiliary materials in the melting furnace roasting device, the sulfur-containing flue gas generated during the calcination process is collected and sequentially treated through a waste heat recovery device, a purification drying device, and a two-transfer two-absorption device to obtain industrial-grade sulfuric acid.

The utility model relates to the technical field of antenna protection equipment discloses a kind of lightweight recyclable thermoplastic radome, including the cover body made of thermoplastic composite material, hollow interlayer structure is arranged in the wall of the cover body;Thermoplastic composite material is with thermoplastic resin as matrix, and with fibre fabric as reinforcing material.A kind of lightweight recyclable thermoplastic radome, all adopt thermoplastic material, product life cycle end can be recycled by heating melting and realize the recycling of material, solve the environmental pollution problem of thermosetting composite material.

This invention provides an improved method for preparing perfluorosulfonic acid ion exchange membranes by melt extrusion blow molding, as well as the films prepared by this method and their applications. The method includes the following steps: (1) mixing materials containing perfluorosulfonic acid fluorine resin, sulfonated graphene and additives in a mixer in proportion, extruding and granulating them using a vented twin-screw extruder, cooling and drying to obtain a masterbatch; the mass ratio of perfluorosulfonic acid fluorine resin, sulfonated graphene and 2,5-diamino-terephthalic acid is 100:10-20:1-3; (2) feeding the masterbatch obtained in step (1) into a single-screw extruder, melt extruding and blow molding it into a film through a blown film die head, and obtaining a perfluorosulfonic acid ion exchange membrane after cooling; (3) saponifying the perfluorosulfonic acid ion exchange membrane obtained in step (2) with NaOH methanol solution to obtain a sodium perfluorosulfonate type perfluorosulfonic acid hydrogen type ion exchange membrane; or reacting the perfluorosulfonic acid ion exchange membrane obtained in step (2) with HCl solution to obtain a perfluorosulfonic acid hydrogen type ion exchange membrane.

The utility model belongs to the field of mask substrates, and particularly relates to a recovery processing system of a mask substrate. Comprising a film stripping module, the film stripping module comprises a film stripping container and a clearing container, the clearing container is arranged at the rear end of the film stripping container, film stripping liquid is contained in the film stripping container, and clearing liquid is contained in the clearing container; and the drying module is arranged at the rear end of the film stripping module. The utility model provides a recovery processing system of a mask substrate, and aims to solve the problem of recovery of the mask substrate.

The application relates to a method for preparing a ceramic copper-clad plate by direct writing 3D printing of copper paste, and relates to a method for preparing a ceramic copper-clad plate. The application aims to solve the problems that traditional ceramic substrate copper-clad technology cannot simultaneously consider low cost, high precision, controllable thickness and simple process, and solve the problem that existing 3D printing copper paste technology cannot simultaneously consider thick copper and precision. The method comprises the following steps: 1, preparation of 3D printing conductive copper paste; 2, direct writing 3D printing of the copper paste; and 3, sintering. The application is used for preparing a ceramic copper-clad plate by direct writing 3D printing of copper paste.

The application relates to the field of vegetable oil processing machinery and equipment, in particular to a feeding device matched with an oil press. The feeding device is composed of a supporting frame, a circulating chain transmission mechanism installed on the supporting frame and a plurality of material bearing containers equidistantly arranged on the circulating chain transmission mechanism. The supporting frame is fixedly connected with an external sealing cover to form a closed conveying channel, wherein the circulating chain transmission mechanism comprises at least one closed-loop conveying chain which is driven to circulate by a driving assembly arranged on the supporting frame. Each material bearing container is connected with the conveying chain through a tail double-pivot hinge mechanism, and the hinge mechanism enables the container to rotate around the axis. The feeding device can realize vertical or large-angle lifting, and can reduce the oil crushing rate and operation noise.

The invention discloses a high-transparency and high-barrier paper-based packaging material based on in-situ layered construction and a preparation method of the high-transparency and high-barrier paper-based packaging material, and belongs to the technical field of pulping, papermaking and paper-based functional materials. The method mainly comprises the following steps: 1, preparing carboxymethyl fibers; 2, preparing the TEMPO oxidized nano cellulose; 3, preparing raw paper of the high-transparency fiber supporting layer; 4, preparing a hydrogel precursor solution; 5, preparing a mixed coagulating bath; and 6, preparing the high-transparency and high-barrier paper-based packaging material. The invention provides a technical concept of'in-situ layered construction ', a high-transparency and high-strength fiber supporting layer is constructed through plant fibers, CM-fibers and TEMPO oxidized nanofibers, and the high-transparency and high-strength fiber supporting layer is prepared by utilizing the principles of ionic crosslinking and solvent exchange. A hydrogel optical interface layer for filling matrix pores and a compact surface barrier functional film layer are synchronously constructed on the surface of the fiber supporting layer, and finally the high-transparency and high-barrier paper-based packaging material constructed based on in-situ layering is prepared.

The utility model discloses a hot water type coating waste gas waste heat recycling device and environmental protection heating system, including waste gas intake pipe, waste gas outlet pipe, heat pump unit, heat preservation water tank, first circulating water pump, second circulating water pump and phase change heat storage tank, and heat pump unit includes waste heat heat exchanger, the upper end of heat preservation water tank is equipped with water inlet pipe and heating pipe, and the lower end of heat preservation water tank is equipped with first water outlet pipe, second water outlet pipe, first return pipe and second return pipe, heat pump unit, water inlet pipe, heat preservation water tank, first water outlet pipe, first circulating water pump head -tail connection to form first heating cycle system, and second water outlet pipe, second circulating water pump, phase change heat storage tank, second return pipe head -tail connection to form phase change heat storage system. The above -mentioned device is coupled through heat pump unit, heat preservation water tank, phase change heat storage tank and other equipment, and the load fluctuation is buffered, and the host computer frequent start is reduced, realizes the high -quality utilization of waste heat, solves the energy waste and environmental pollution problem in traditional craft.

The invention belongs to the technical field of chemical wastewater treatment and recycling, and particularly relates to a method for preparing fumaric acid by treating maleic acid wastewater. The pretreated maleic acid wastewater passes through at least two stages of fixed bed reactors connected in series, the fixed bed reactors are filled with a thiourea supported catalyst, maleic acid is subjected to a continuous isomerization reaction, and a fumaric acid product is obtained. The thiourea supported catalyst takes mesoporous silica or alumina as a carrier, and thiourea groups are immobilized on the surface of the carrier through covalent bonds. The invention relates to an integrated system for realizing continuous catalytic reaction, intermediate product separation and efficient utilization of a catalyst by using a thiourea supported catalyst, and particularly relates to an integrated system for realizing continuous catalytic reaction, intermediate product separation and efficient utilization of the catalyst by using a multistage fixed bed reactor to catalyze epoxiconazole to produce maleic acid-containing wastewater through isomerization.

The utility model relates to a kind of self-cleaning filter dry slag system mechanism, it includes material cavity, the feed inlet is set in the feed end of material cavity, its discharge end is set with extrusion hole;Screw rod driven by motor is arranged in the material cavity, the screw rod is conical structure and its pitch continuously decreases along material conveying direction;Coarse filter screen and conical screen are arranged in the material cavity along material conveying direction, the coarse filter screen is set at near the feed inlet, the conical screen is sleeved in the outer periphery of the screw rod, the material cavity is respectively set with and the coarse filter screen and conical screen intercommunication drain outlet.The utility model has the effect that dehydration efficiency is high, can reduce material liquid waste in the process of discharging slag and reduce environmental pollution simultaneously.

The present application provides a kind of paste pipeline blockage dredging device, including pressure release device, dredging pipe, dredging pipe transport device and passage excavation device;The pressure release device includes the buffer pipe section of tubular hollow structure with the same diameter as the system main pipeline pipe diameter;Its one side outlet is connected with paste pipeline conveying system main pipeline;The dredging pipe has multiple, stacked in dredging pipe transport device;Each dredging pipe includes outer sleeve and spiral inner tube, spiral inner tube is sleeved into outer sleeve, spiral inner tube can rotate in outer sleeve, the dredging pipe transport device is used to store, rotate, push, recycle dredging pipe, also discloses corresponding dredging method;Can be blocked in paste pipeline system, especially hard blocked section is pressure-tight dredged.Avoids the material leakage discharge and environmental pollution problem caused by cutting pipe, has strong adaptability, high flexibility, is easy to use and has strong dredging performance.

The application discloses application of pinocembrin in prevention and treatment of tobacco black shank, and relates to pinocembrin and agriculturally acceptable derivatives thereof. The compound can significantly inhibit hypha growth and sporangium formation of the tobacco black shank fungus; when the concentration of the pinocembrin is 25 mg / L, the hypha inhibition rate of the pinocembrin is 77.6%; the pinocembrin can dose-dependently inhibit sporangium formation in the range of 0.78125-12.5 mg / L, the pinocembrin can completely inhibit sporangium formation when the concentration of the pinocembrin is 3.125 mg / L or higher, and the EC 50 The pinocembrin is a natural plant source component, is green, easy to degrade, and low in residue, can be used for green prevention and treatment of the tobacco black shank, and provides a new direction for development of a new type of plant source fungicide.

The invention discloses degradable small-leaf broadleaf holly leaf antibacterial wet toilet paper and a preparation method thereof.The wet toilet paper comprises a fiber paper base material capable of being dispersed and degraded and functional liquid medicine evenly loaded on the fiber paper base material, the functional liquid medicine only contains a small-leaf broadleaf holly leaf extract with the concentration being 12.5-25 mg / mL and purified water, the water content of the product is controlled to range from 60% to 65%, and the water content of the product is controlled to range from 20% to 30%. The antibacterial rate on various common pathogenic bacteria is greater than or equal to 95%, the pH value is 5.5-6.5, and the antibacterial agent is mild and non-irritant; according to the preparation method, the high-activity small-leaf broadleaf holly leaf extract is prepared through a specific process, a base material is subjected to accurate soaking and extrusion dehydration by adopting optimized liquid-paper ratio, temperature and time parameters, then folding and slitting are performed, and finally strict sterile packaging is performed, so that the high-activity small-leaf broadleaf holly leaf extract is obtained. Therefore, the environment-friendly wet toilet paper product which is natural and pure in component, good in antibacterial effect, safe and comfortable to use and biodegradable is obtained.

The invention discloses a preparation method of metal vanadium. The preparation method comprises the following steps: firstly, carrying out dehydration pretreatment on vanadium pentoxide under a vacuum condition; then carrying out electrolytic reduction for 2-4 hours in NaCl-KCl mixed molten salt at the temperature of 600-800 DEG C by taking dehydrated vanadium pentoxide as a cathode and graphite as an anode; cooling a product after the reaction, and separating and washing to obtain metal vanadium; and finally, annealing at 900-1000 DEG C in a hydrogen atmosphere for 1-3 hours for purification. According to the method, vanadium pentoxide is efficiently reduced at the relatively low temperature (700-800 DEG C), the production period is shortened, and energy consumption is reduced; a non-corrosive molten salt system is adopted, so that the problems of equipment corrosion and environmental pollution are solved; through the synergistic effect of molten salt electrolysis and hydrogen annealing, the purity gt is stably prepared; the metal vanadium powder with the purity of 99.9%, the single phase and the regular shape is obtained, and the product quality is high.

The invention discloses high-performance leather based on bio-based raw materials and a preparation method of the high-performance leather, and belongs to the technical field of leather. The leather is of a three-layer functional gradient structure and sequentially comprises the following components from bottom to top: a bottom layer which is formed by catalyzing and crosslinking a thermoplastic starch matrix, vegetable tannin and activated keratin through laccase; the middle foaming layer is formed by hot-pressing and foaming a thermoplastic starch matrix, sodium bicarbonate and citric acid; the surface layer is formed by catalytic crosslinking of a thermoplastic starch matrix, cane sugar and nano-crystalline cellulose through oxidase. The preparation method comprises the following steps: respectively preparing the bottom layer slurry, the middle layer slurry and the surface layer slurry, and carrying out semi-dry method compounding and integrated hot press molding. The raw materials are all renewable bio-based components, and the preparation process is green and environment-friendly; the prepared leather has high tensile strength, excellent wear resistance and water resistance, tight interlayer combination, good softness and buffering performance and excellent comprehensive performance, can be widely applied to the fields of shoe materials, bags and suitcases and the like, and has a good industrialization prospect.

The application discloses a composite material recycling method for side wall remanufacturing, and aims to solve the problems of difficult separation of waste side wall composite materials and poor performance of recycled materials. The method comprises the following steps: disassembling and pretreating the waste side wall composite materials, separating and recycling the reinforcing fibers and resin powders by a pyrolysis-mechanical combined method, modifying the surface of the recycled fibers, regenerating and modifying the recycled resin, mixing the repaired materials and additives to prepare regenerated composite materials, and finally completing the side wall remanufacturing through mold pressing. The method combines the advantages of pyrolysis and mechanical method, realizes efficient and environment-friendly separation of materials, significantly improves the performance of recycled materials through modification and repair, meets the use requirements of the side wall, realizes resource recycling, reduces the cost of remanufacturing, and has economic benefits and environmental benefits.

The application provides a reaction device and a preparation method of 2,2-dinitropropanol. The preparation method comprises the following steps: sequentially performing the following reactions in a plurality of continuous sub-static tubular reactors: nitroethane reacts with an alkaline solution to obtain a dehydrogenation system; the dehydrogenation system reacts with a formaldehyde aqueous solution to obtain a hydroxymethylation intermediate system; the hydroxymethylation intermediate system reacts with a sodium nitrite solution to obtain a nitrosation intermediate system; the nitrosation intermediate system reacts with a sodium persulfate aqueous solution and a potassium ferricyanide aqueous solution to obtain a partial oxidation intermediate system; and the partial oxidation intermediate system is transported into a dynamic tubular reactor to continue to occur oxidation reaction to generate a 2,2-dinitropropanol system. The preparation method can solve the problems in the existing 2,2-dinitropropanol preparation process, such as that the reaction heat release is intense and difficult to control, that solid impurities generated in the oxidation step cause pipeline blockage, and that the cost is high and environmental pollution is caused due to excessive reliance on solvent dilution.