551results about How to "Many pores" patented technology

A massive body, e.g., a tablet, for producing a solution of chlorine dioxide when the massive body is added to liquid water. The massive body comprises a metal chlorite such as sodium chlorite, an acid source such as sodium bisulfate and a source of free halogen such as the sodium salt of dichloroisocyanuric acid or a hydrate thereof. The concentration of free halogen in the solution will be:

• • (a) less than the concentration of chlorine dioxide in said solution on a weight basis and the ratio of the concentration of chlorine dioxide to the sum of the concentrations of chlorine dioxide and chlorite anion in said solution is at least 0.25:1 by weight; or
  • (b) equal to or greater than the concentration of chlorine dioxide in said solution on a weight basis and the ratio of the concentration of chlorine dioxide to the sum of the concentrations of chlorine dioxide and chlorite anion in said solution is at least 0.50:1 by weight.

The invention relates to saline-alkali soil paddy rice special-purpose carbon-based organic fertilizer. The saline-alkali soil paddy rice special-purpose carbon-based organic fertilizer has a low cost and high fertilizer efficiency, is economic and environmentally friendly, improves a soil water binding capacity and permeability, and has functions of keeping fertility, slowly releasing fertilizer and reducing paddy rice salinization. The saline-alkali soil paddy rice special-purpose carbon-based organic fertilizer comprises biomass charcoal, chicken manure, pyroligneous liquor, fermented soybean meal and potassium humate. The biomass charcoal is prepared by thermal cracking charring of biomass raw materials under anoxic conditions. The saline-alkali soil paddy rice special-purpose carbon-based organic fertilizer can be used for paddy rice plantation, can improve a saline-alkali soil environment and can improve an organic paddy rice yield.

The present invention relates to one kind of suspended microbial carrier for biological waste water treatment. The mixture of rubber powder in 35-70 wt%, resin in 25-55 wt%, chemical foaming agent in 0.1-5 wt% and specific weight regulating material in 0-10 wt% is hot extruded to form shaped body of 0.90-1.1 g/cu cm specific weight and with great amount of closed bubbles. The suspended microbial carrier has great buoyancy, and can maintain suspension state in treated water after microbe attachment. In addition, nutritious matter may be added into the carrier material for promoting the colonization and growth of microbe.

The invention discloses molding sand. The molding sand is characterized by being prepared from the following materials in parts by weight: 200-240 parts of quartz sand, 30-35 parts of sericite, 60-70 parts of kaolin, 30-40 parts of calcium carbonate, 10-15 parts of coke powder, 10-15 parts of clays, 2-4 parts of titanium dioxide, 4-5 parts of aluminum oxide powder, 20-30 parts of argil, 3-4 parts of asphalt, 10-15 parts of bentonite, 3-4 parts of ammonium dihydrogen phosphate, 4-5 parts of sodium metasilicate, 2-3 parts of sodium dodecyl benzene sulfonate and an appropriate amount of water. According to the invention, the quartz sand, the sericite and the kaolin are used and roasted to achieve abundant pores and good gas permeability, moreover, mobility is good, and grinding of added calcium carbonate, clay, titanium dioxide, asphalt, and the like is combined, so that the molding sand has excellent cohesiveness, plasticity and heat stability, and also has high collapsibility. The molding sand material disclosed by the invention is fine and uniform; a casting piece produced by the molding sand has a smooth surface and a few flaws.

The invention provides a method for effectively removing ammonia nitrogen from a polluted water body, which comprises the following steps of: removing large suspended particles from source water polluted by a nitrogen source by the conventional drinking water treatment process; introducing into a modified nitrifying bacteria immobilization filter to remove the ammonia nitrogen by using immobilized nitrifying bacteria; and performing loading modification and nitrifying bacteria immobilization on activated carbon used in the nitrifying bacteria immobilization filter. By the method, the ammonia nitrogen in micro-polluted source water can be effectively removed at normal temperature and at a low temperature; meanwhile, operating cost is obviously reduced; the active element iron loaded by theactivated carbon is favorable for improving the ammonia nitrogen adsorption property of the activated carbon; and the nitrifying bacteria are stably attached. The method is suitable for treating water bodies with different pollution degrees, and is good in effect and wide in application range.

The invention relates to a thermal preparation method of a solution of a self-supported porous graphene-based membrane, relates to a preparation method of a self-supported porous graphene-based membrane, and aims to solve the technical problems that the size and the thickness of a conventional self-supported porous graphene-based membrane are limited and the electrochemical performance of the conventional self-supported porous graphene-based membrane is poor caused by severe interlay lamination of graphene sheets in the chemical reduction process. The thermal preparation method comprises the following steps: dispersing graphene oxide into water, adding or not adding a doped carbon material, concentrating, and spreading into a membrane, thereby obtaining a graphene oxide membrane; preparing a thermal treatment solution by using acid or alkali solute, putting the graphene oxide membrane into a reaction kettle with a polytetrafluoroethylene lining, adding the thermal treatment solution according to the standard that the membrane is submerged, sealing the reaction kettle, and subsequently performing thermal treatment, thereby obtaining the self-supported porous graphene-based membrane. The self-supported porous graphene-based membrane is prepared by orderly arranging graphene sheets in parallel, and due to the gaps among the graphene sheet layers, the self-supported porous graphene-based membrane can be used in electrochemical energy storage devices such as supercapacitors.

The invention discloses a method for preparing a tin dioxide/graphene-compounded anode material of a lithium ion battery. The method comprises the following steps: uniformly mixing choline chloride, ethylene glycol and graphene oxide to obtain a mixed solution, adding stannous chloride to the mixed solution, performing ultrasonic oscillating reaction, and performing post-processing to obtain the product. According to the method for preparing the tin dioxide/graphene-compounded anode material of the lithium ion battery, a normal-pressure and normal-temperature one-step method is adopted, the adopted raw materials are simple in components and common and easy to obtain, the reaction conditions are mild and controllable, the reaction can be performed at normal temperature and normal pressure, and the preparation process is simple and practicable, has low requirements for equipment so as to be free from geographical restrictions, and is suitable for large-scale industrial production. The prepared tin dioxide/graphene-compounded anode material of the lithium ion battery has excellent electrochemical properties, and can be used as an active electrode substance for preparing an anode of the lithium ion battery so as to have a wide market application prospect.

The invention discloses a preparation method for titanium dioxide serving as a catalyst carrier. The preparation method comprises the following steps of: dispersing metatitanic acid serving as a raw material by pulping, and adjusting until the concentration of the slurry is 12 to 26 mass percent based on titanium dioxide (TiO2); adding ammonia water into the slurry, and adjusting the pH value to be between 6.0 and 9.0; filtering and dehydrating to obtain a blocky filter cake; mechanically crushing the blocky filter cake; drying and calcining the crushed filter cake at 200 to 560 DEG C for 6 hours; and grinding the calcined material in a kiln to obtain a titanium dioxide product which serves as a denitration catalyst carrier. By the preparation method, the manufacturing cost is low, the process is simple, the prepared product has the advantages of large specific area, high surface chemical activity and high processability, and the prepared final product is high in catalytic efficiency.

The invention discloses a silt-matrical ecological floating island and a construction method thereof. The silt-matrical ecological floating island is constructed by the following materials: silt, light material ESP bubble grains and a curing agent prepared as per certain proportion. The steps thereof are: the lake silt, the bubble grains and the inorganic bond (curing agent, silicate, phosphate, borate or the compound thereof, such as cement or clay, and the like) and water are mixed and stirred; the mixture is filled in a mould; after solidification, dryness and molding, the mixture is taken out; the mixture is put in the polluted water body independently or after plants are planted; and the polluted water body is purified by the growth of microorganisms and plants on the floating island. Being inorganic materials, all the raw materials have stable chemical performance and no secondary pollution and is environmental-friendly, the co-action of plants and microorganisms is utilized for purifying water bodies, perfecting sights, and the effect is stable.

The invention belongs to the technical field of material chemistry, in particular to a lithium sulfur battery cathode material and a lithium sulfur battery thereof. A lithium sulfide battery cathode material is prepared by that following preparation method: using N, N-Dimethylformamide as solvent, dissolving polyacrylonitrile and silica in N, N-Dimethylformamide Solution to prepare the spinning precursor liquid; preparing a silica-polyacrylonitrile membrane by using the electrospinning; carbonizing the silica-polyacrylonitrile membrane to obtain carbon fiber-silica composites, then soaking thecarbon fiber-silica composite in hydrofluoric acid to form the porous carbon fiber material, and doping the porous carbon fiber material with sulfur to prepare nitrogen doped porous carbon-sulfur cathode material in situ. The cathode material of the lithium sulfide battery has a porous structure, provides a large number of ion channels and a high specific surface area, effectively improves the shuttle effect of polysulfides in the lithium sulfide battery, and improves the cycle life of the lithium sulfide battery and the utilization rate of active substances in the cathode material.

The invention relates to the technical field of soil improvement, and concretely discloses a saline-alkaline land soil conditioner, and a preparation method and an application thereof. Raw materials of the conditioner comprise 400-600 parts of a biomass decomposed material, 150-242 parts of a pyroligneous liquor, 200-300 parts of charcoal powder, 4-10 parts of urea and 2-10 parts of a microbial agent. All the components are synergistically combined, so the conditioner contains abundant organic matters, provides favorable conditions for crop growth, can improve the physical and chemical properties of the soil and slowly release nutrients, improves the fertilizer utilization rate and the water holding capacity of the soil, effectively reduces the pH value of the soil and the salt content ina soil solution, delays accumulation of salt in the surface soil, and has a good improvement effect on saline-alkaline land soil.

The invention provides a method for preparing a porous adsorption material by using microwave low-temperature pore-forming activated granular red mud. The method comprises the following steps: taking a bonding agent which is 2-10 percent of mass of the red mud, uniformly mixing red mud wastes and the bonding agent, kneading into grains by using a granulator or by a hand and activating the red mud grains for 5-30 minutes at an activation temperature of 80-500 DEG C by utilizing microwaves to obtain the porous adsorption material. The red mud is activated by utilizing the selective heating and resonant sintering effects of the microwaves on iron and other matters in the red mud. The porous adsorption material prepared by the method has a pore volume of more than 0.0826 ml/g and a specific surface area of 18.62-24.25 m2/g, and the grain size can be different as required. The produced porous adsorption material has the characteristics of fine grain, high porosity, large surface area, strong hydroscopicity, good temperature-resistant stability and low cost and has the great advantage in aspect of wastewater adsorption and treatment.

The invention discloses an emission reduction method of nitrous oxide during composting. The emission reduction method comprises the steps that biomass charcoal serves as a nitrous oxide adsorbent; 20-40kg biomass charcoal is used for a composting raw material per ton and is added for two times; at the first time, 10-20kg biomass charcoal and the composting raw material are sufficiently mixed and placed in a composting tank to keep the water content and carbon nitrogen ratio of a composting initial material to be 60-70% and 20-25 respectively in a composting initial material stacking period; at the second time, 10-20kg biomass charcoal is added at 15th-18th day of the composting; a windrow composting technology is adopted in the whole composting process; pile turning is conducted manually or mechanically intermittently; the whole compost fermentation period is 30-45 days; and the fermentation temperature is higher than 60 DEG C in at least 8 consecutive days. The emission reduction method has the advantages of simplicity in operation, low cost, no secondary pollution caused by a production technology, and the like, and is applied to the animal manure composting, and has a very important practical significance in emission reduction, regulation and control of N2O during the composting.

The invention relates to a preparation method for a spirogyra-based biomass carbon material/nanometer sulfur composite material. The method comprises the following steps of washing and drying spirogyra, heating the washed and dried spirogyra in a vacuum tubular furnace, carrying out heat preservation and carbonization at 500-900 DEG C, mixing the carbonized spirogyra with nanometer sulfur with ultrasound, carrying out ball milling, drying the ball-milled mixture by an air blow drying box, heating the dried mixture in the vacuum tubular furnace, carrying out heat preservation for 3-6 hours at 100-200 DEG C, and afterwards cooling the mixture subjected to heat preservation to a room temperature with the furnace to obtain the target product, namely the spirogyra-based biomass carbon/nanometer sulfur composite material. According to the preparation method, the spirogyra is taken as a precursor for the first time, and a biomass carbon material with a continuous sheet-shaped structure similar to graphene and with nanoscale thickness is synthesized; the biomass carbon material comprises the sheet-shaped structure composed of continuous fibers, also is provided with nanoscale pores and is high in uniformity and continuity, the loading of sulfur particles is facilitated, and the obtained composite material has favorably electrochemical performance.

The invention discloses a three-dimensional fiber-based composite aerogel type adsorbent preparation method. According to the method, cellulosic fiber, chitosan and sodium alginate which generally exist in natural world are utilized as raw materials. The method comprises the steps: firstly, utilizing periodate and metaphosphoric acid to sequentially chemically modify the cellulosic fiber; then crosslinking the modified cellulosic fiber with the chitosan; then compounding with the sodium alginate; freeze drying to obtain a three-dimensional fiber-based composite aerogel type adsorbent. The prepared adsorbent disclosed by the invention has high safe stability, has a good adsorption effect on negative ion pollutants and positive ion pollutants and can be applied to purifying heavy metal ion wastewater and dyestuff wastewater; in addition, the cellulosic fiber added into the adsorbent disclosed by the invention not only can serve as a framework and a reinforcing material, but also can be crosslinked with the chitosan to improve compression strength, morphology and structural stability of the whole aerogel adsorbent; thus, the adsorbent can be repeatedly used for many times, and the characteristics of rice inner holes and large specific surface area of the aerogel are fully played.

The invention discloses a foam copper-supported porous copper oxide nanowire composite material. The material comprises a foam copper substrate and a copper oxide nanowire supported on the surface, wherein the copper oxide nanowires are 8 to 12 mum in lengths, and are 150 to 250 nanometers in widths; the nanowires do not crack or fall easily; microscopically, the nanowires have porous structures, and pore diameters are 2 to 4 nanometers; macroscopically, the nanowires are distributed radially, and every 60 to 150 nanowires constitute a copper oxide micro-flower. The obtained composite material has a multi-grade and porous structure, and the whole three-dimensional structure is rich in apertures which are suitable for the permission of light rays and ion transport. When the composite material is taken as a photocatalytic degradation organic dye, the degradation efficiency can be increased by over 10 times; when the composite material is taken as a negative electrode material of a lithium ion battery, the capacity retention ratio can be increased by over 30 percent.

The invention discloses a special controllable slow-release organic fertilizer for rice. The organic fertilizer is prepared from raw materials in parts by weight as follows: 5-6 parts of ocher, 55-65 parts of cow dung, 3-4 parts of calamine, 2-3 parts of urea, 3-4 parts of zinc sulfate, 15-25 parts of kaolin, 6-8 parts of hydrilla varticillata powder, 3-4 parts of spodumene powder, 4-5 parts of ammonium dihydrogen phosphate, 2-3 parts of potassium persulfate, 10-12 parts of straw stalk, 5-6 parts of soybean oil residues, 3-4 parts of illite powder, 8-10 parts of sawdust, 20-30 parts of a soil conditioner, 4-5 parts of an EM agent and a proper amount of water. According to the fertilizer, the cow dung is taken as a main raw material, and slow release of the fertilizer is controlled accurately through strict control on particle sizes of fertilizer granules, so that the requirement of the rice for the fertilizer in different growth periods is met; meanwhile, multiple highly-absorbent raw materials in the raw materials are used, so that pesticide residues and heavy metal pollution in soil can be eliminated, and the foundation is laid for the green and ecological agriculture.

The invention discloses a compound concrete expanding agent. The compound concrete expanding agent is prepared by using the following components in parts by weight: 15 to 20 parts of calcium aluminosilicate, 25 to 30 parts of calcium sulphoaluminate, 20 to 30 parts of sulfur fixation waste residue, 10 to 20 parts of red mud, 10 to 15 parts of lithium slag, 4 to 8 parts of modified calcium oxide, 3 to 6 parts of magnesium oxide, 5 to 8 parts of methyl sodium silicate, 0.1 to 0.3 part of azodicarbonamide, 0.4 to 0.7 part of sodium tripolyphosphate, 2 to 4 parts of lauryl sodium sulfate, 0.3 to 0.6 part of ethylene-acrylic acid copolymer, 0.7 to 0.9 part of polycarboxylate superplasticizer and 0.5 to 0.7 part of nano calcium carbonate. The compound concrete expanding agent has the advantages of high strength, good compensation capability, calcium oxide reaction regulation and the like, and is a concrete additive which has a great development prospect.

The invention discloses a method for preparing an artificial vesuvianite building block from Bayer red mud. The method for preparing the artificial vesuvianite building block from Bayer red mud comprises the following steps of carrying out milling and slurrying of Bayer red mud, carrying out mixing and blank preparation, carrying out drying and sintering, and carrying out cooling. The method for preparing the artificial vesuvianite building block from Bayer red mud has a low investment cost and simple processes, realizes the preparation of the artificial vesuvianite building block which is a novel artificial non-metallic porous material vesuvianite building block, and provides a novel and reliable approach for Bayer red mud comprehensive utilization. Because of addition of fine coal powder, a leavening agent, a foaming agent and a molding binder in ingredients, a sintered blank has regular or irregular micro-apertures, small apertures and big apertures thereby forming the artificial vesuvianite building block which is a sponge-like ceramic building product. The artificial vesuvianite building block can absorb sound, reduce noise, improve a hearing environment, adjust air humidity by its unique breathing function and improve an ecological environment. Therefore, the artificial vesuvianite building block can be widely utilized for masonry building, floor building and wall decoration, and is an ideal, eco-friendly and energy-saving building and decorative material.