51results about How to "Strongly alkaline" patented technology

The invention discloses a quadruple effect catalyst of diesel tail gas. The catalyst consists of carrier magnesium-aluminium (Mg-Al) hydrotalcite composite oxide, potassium (K) and noble metal, wherein the K and the noble metal are loaded on the carrier Mg-Al hydrotalcite composite oxide; the noble metal is palladium (Pd), platinum (Pt) or rhodium (Rh); the load capacity of the K is 7 to 10 weight percent; and the load capacity of the noble metal is 1 to 2 weight percent. Meanwhile, the invention also discloses a preparation method and application of the catalyst. The catalyst is simple in preparation and easy to operate; the prepared catalyst can remove four main pollutants, namely carbon smoke particles (PM), nitrogen oxide (NOx), carbon oxide (CO) and unburned hydrocarbons (HC); and after being coated on a diesel particle filter, the catalyst can be directly applied to post-treatment of the diesel tail gas, has a good treatment effect and is applied to industrial promotion.

The invention relates to a baking-free insulating brick and a production method thereof. The baking-free insulating brick provided by the invention comprises the following raw materials in parts by weight: 490-590 parts of fragment, 260-320 parts of portland cement, 20-60 parts of dried sludge, 4-5 parts of lime, 1.8-30 parts of expanded perlite, 2-5 parts of straw, 3-5 parts of nut shell, 2.1-1.9 parts of animal wool fiber and 107-130 parts of water. The baking-free insulating brick provided by the invention is prepared by the following production steps: firstly, dewatering and drying sludge; adding lime to the dry sludge to be uniformly mixed; piling; stirring; deodorizing and sterilizing; simultaneously grinding straw, nut shell and animal wool fiber into microparticles; sequentially adding all the raw materials to a stirrer to be uniformly mixed; and finally, carrying out extrusion molding and maintenance on the mixture to obtain a finished baking-free insulating brick. The baking-free insulating brick produced by the invention has good heat insulation property and compressive strength and strong freezing resistance and crack resistance, and the radiation quantity of the baking-free insulating brick is far lower than industrial specified standards.

The invention discloses a preparation method and application of biomass porous carbon for a supercapacitor, and belongs to the field of supercapacitor electrode material preparation. According to thepreparation method, fructus momordicae shells are used as a carbon source, KOH and urea are used as activators, and a high-temperature carbonization method is used for preparing a water supercapacitorelectrode material with an excellent performance. The porous carbon material has a porous structure and a large specific surface area, and provides effective active sites for an electrochemical reaction, electrolyte infiltration and transport and migration of a carrier inside the electrode material are facilitated, and the electrochemical performance of the carbon-based material is improved. According to the method, the production process is simple, reliable and environmental-friendly, the characteristics of excellent double-layer capacitor characteristic, high energy density and high power density, no toxicity and no harm in use, and long cycle service life are achieved, the ideal supercapacitor electrode material is provided, and broad application prospects are achieved in the field ofneutral water supercapacitors.

A desulfurization and dephosphorization technology for a molten iron pretreatment process is characterized in that through adjustment of the specific composition of a desulfurizer and a dephosphorization agent and matching of a corresponding production technology, the content of initial S in molten iron is less than or equal to 0.03% and the content of P is less than or equal to 0.05%. The contentof P of final discharged molten iron after desulfurization and dephosphorization is less than or equal to 0.005%, the content of S is less than or equal to 0.003%, the desulfurization rate is more than or equal to 90%, and the dephosphorization rate is more than or equal to 90%. The raw material requirements in the production of high-grade pipeline steel are met.

The invention discloses a method for synthesizing a novel water purifying agent by utilizing steel acid pickling waste liquid. The method specifically comprises the following steps: (1) enabling the concentration of hydrogen ions in the acid pickling waste liquid to be not higher than 2mol/L and the total iron concentration to be not lower than 0.5g/L by adopting a physical or chemical method; (2)carrying out electrolytic treatment on the acid pickling waste liquid by taking one noble electrode as a positive electrode and the other noble electrode or an iron electrode as a negative electrode,and depositing iron ions in the negative electrode in a form of an iron element or iron compound; (3) putting the negative electrode in a strong alkaline electrolyte after depositing a certain amountof iron or iron compound on the negative electrode, carrying out electrolytic treatment by as a positive electrode, and converting iron on the positive electrode into strong-oxidation ferrate by utilizing oxidation of the positive electrode; (4) enabling the ferrate to exist in a strong alkaline solution in a form of a solute or an insoluble substance, and forming the novel water purifying agent.The method disclosed by the invention has the advantages that emission of industrial waste is reduced, the resource is saved, high-value utilization of the iron ions can be realized, and a very goodapplication prospect is obtained.

The invention discloses a method for recycling molybdenum from waste hydrogenation catalysts and belongs to the technical field of recycling of solid wastes. The method comprises the following steps: mixing the waste hydrogenation catalysts with red mud according to a ratio, crushing and grinding uniformly, and roasting and leaching in water; adding acid into a leaching solution to adjust the pH value, and selectively extracting molybdenum from a molybdenum-containing acid solution after aluminum hydroxide is separated out through a chelating extraction agent; carrying out back extraction on the molybdenum-containing organic phase by using ammonia water, ammonium salt or a mixed solution of the ammonia water and the ammonium salt; and adding an impurity removing agent into a back extraction solution to remove impurities such as P and Si, adjusting the pH value by using hydrochloric acid, and concentrating, evaporating and crystallizing to obtain an ammonium molybdate product. According to the method, the problems that the traditional sodium salt roasting energy consumption is high and the corrosion property is strong are solved; efficient extraction of metal molybdenum is achieved through the chelating extraction agent; the impurities are removed before preparing ammonium molybdate; the comprehensive recovery rate of molybdenum is greater than 85%; and the method has a certain application value.

The invention discloses a metallurgy waste residue resource comprehensive recovering method. The method comprises the following steps: grinding a melting point agent and a viscosity agent to be powder, uniformly mixing, to obtain a metallurgy waste residue texturizing agent; adding the metallurgy waste residue texturizing agent to an oven-fresh metallurgy waste residue, after uniformly stirring, pouring into an atomizer, and atomizing the metallurgy waste residue as ultramicro metallurgy waste residue particles by using high-speed fluid; separating the metallurgy waste residue particles and the fluid, through reselection and magnetic separation, separating high iron particles and low iron particles in the metallurgy waste residue particles; adding a mesoporous agent and a microporous agentto the low iron particles, uniformly mixing, pouring into a mould for forming, placing in a kiln for drying, after calcining, to obtain a heat-preserving wall material; and coating on the surface ofthe heat-preserving wall material by an enamel material. Compared with a current technical scheme, the method has the characteristics of low production cost, comprehensive resource utilization, and ahigh product added value.

The invention relates to a method for curing sludge for roadbed filling. The method is characterized in that quick lime, emulsified asphalt and natural soil are adopted as curing materials, and the method comprises the following steps that 1, 5% to 15% of quick lime is added to the sludge with the moisture content of 65% to 85% to be stirred; 2, after the quick lime is stirred to be uniform, 5% to 10% of emulsified asphalt is added for secondary stirring; 3, after the emulsified asphalt is stirred to be uniform, 400% to 500% of natural soil is added to be stirred for the third time; 4, after the stirred sludge is cured for dry maintenance for 7 days, the sludge is directly used for roadbed filling. The method has the advantages that the treated sludge cured soil is high in strength, free of pollution and high in long-term stability. The sludge cured soil can be directly used for roadbed filling, waste is turned into wealth, and high economic benefits are achieved.

The invention discloses a powder alkali cleaner, comprising the following substances of: 25-35 wt% of grape alkali, 54-69 wt% of sodium hydroxide, 2-12 wt% of tetrasodium edetate, and 0-2 wt% of soda ash. The powder alkali cleaner provided by the invention is applicable to clean spinning spinnerets (PACK), parts and monomer candles of chemical fiber and terylene factories; can remove carbide, heat scale, dirt, grease stain and polymer, resist rust, and strip titanium dioxide (TiO2) on filter tubes; by using the powder alkali cleaner, two third of additive volume can be saved, the waste processing amount can also be reduced, the filter changing period of filter cores can be prolonged, the production process can be improved, and the output and quality can be greatly enhanced.

The invention discloses a preparation method of anatase type nano titanium dioxide microspheres. The preparation method comprises the following steps: dissolving isopropanol in diethylenetriamine, anduniformly mixing to obtain a solution A; dissolving the solution A in isopropyl titanate, and uniformly mixing to obtain a solution B; transferring the solution B into a high-pressure reaction kettlewith a polytetrafluoroethylene lining; wherein the filling degree of the high-pressure reaction kettle is 80%, then putting the high-pressure reaction kettle into an electronic constant-temperature blast drying oven at 160-220 DEG C to react for 12-24 hours, taking out the high-pressure reaction kettle after the reaction is finished, naturally cooling to room temperature, and then centrifuging toobtain a precipitate; and washing, drying, grinding and calcining the precipitate to obtain the anatase type nano titanium dioxide microsphere. According to the preparation method, titanium isopropoxide is adopted as a titanium source, diethylenetriamine is adopted as a crystal face control agent, the titanium dioxide microsphere with the exposed (001) crystal face is prepared, liquid HF with strong corrosivity is not used, and the problems of equipment corrosion, environmental pollution and the like are avoided.

The invention discloses a compound bonding agent for a baking-free magnesium vibration material. The compound bonding agent is composed of the following components by mass percent: 86.35 wt% of anhydrous dextrose, 4.55 wt% of borax, 4.55 wt% of tropine and 4.55 wt% of industrial salt. The bonding agent is the non-toxic, tasteless and nuisanceless white crystalline particles or powder, has strong basicity, is easily dissolved in water, and is insoluble in alcohol and acid, the aqueous solution of the bonding agent is alkaline, and the bonding agent belongs to inorganic salt products. No elements polluting molten steel exist, no toxic or harmful gas is produced during heating the bonding agent, occupational safety and health of workers cannot be influenced, and no pollution to the environment is caused.

The invention belongs to the technical field of fuel coal additives, discloses a fuel coal additive and a preparation method thereof, and solves the problems that the conventional fuel coal additive is high in cost and low in efficiency. The preparation method comprises the following steps: using glycerol as a main raw material to work together with potassium hydroxide or sodium hydroxide, sodium peroxide, borax and sodium silicate, using water as a solvent, and uniformly mixing to prepare an additive stock solution. When in use, the additive is diluted according to the ratio of the additive to water to coal of (1-4):40:4000, and then the solution is uniformly sprayed on the surface of pre-burning coal through a spray nozzle to be put into a boiler to be burnt. Testing results show that the fuel coal additive has the advantages of high coal-saving efficiency, obvious desulfuration, denitration and smoke abatement effects, low use cost and the like, the coal is saved by 5-20%, the sulfur dioxide and nitrogen oxide emission is reduced by 31%-50%, and the slag carbon content is reduced by 10%-12%.

The invention discloses a method for preparing a soil remediating and modifying agent through oyster shell powder-medical stone powder. The method is characterized by comprising the following steps: flushing oyster shell with water; drying by air; soaking in a sodium hydroxide solution; drying by air; roughly milling through a universal crusher and a stainless steel crusher; sieving; drying; pneumatically crushing powder through a supersonic speed airflow crusher to obtain ultrafine powder of oyster shell; dissolving ferrous sulfate into ethyl alcohol/ water mixing liquid to obtain a solvent;adding the ultrafine powder of oyster shell, and uniformly stirring; charging nitrogen; slowly adding a reducing solution which is potassium borohydride with stirring, and fully reacting; removing supernatant liquid; washing with deionized water; washing with absolute ethyl alcohol; drying to obtain nano-iron modified ultrafine powder of oyster shell; crushing biomass clinker by ball milling; sieving; adding concentrated sulfuric acid for leaching; heating; activating; leaching with water; cooling and filtering to obtain activated biomass clinker; uniformly mixing the activated biomass, medical stone powder and modified ultrafine powder of oyster shell; and pelletizing to obtain the soil remediating and modifying agent.

The invention relates to the field of application of industrial slag, in particular to a PVC material with low density and high plasticity. The PVC material is prepared from the following raw materials in parts by weight: PVC resin, red mud, micro-beads, a stabilizer, a yellow foaming agent, a foaming regulator, diester phthalate, di-n-butyl phthalate, di-iso-decyl phthalate, di-isononyl phthalateand 2, 2, 4-trimethyl-1, 3-pentanediol diisobutyrate. According to the method, a large amount of red mud is utilized, recycling of industrial waste residues is achieved, and pollution of industrial slag to the land is reduced. In addition, the micro-beads are aluminosilicate fine micro-beads (sinking beads) of superfine coal ash which are globally distributed, continuous in particle size distribution, superfine and solid, have a loose and porous structure, and can be added into the PVC material as a raw material to achieve the purpose of reducing the dead weight through the physical characteristics of the micro-beads.

The invention discloses a treatment method of aluminum-containing waste acid. The treatment method comprises the following steps: firstly neutralizing the aluminum-containing waste acid to certain acidity with activated magnesium oxide; then adjusting a magnesium-aluminum proportion with magnesium salt and aluminum salt; under a stirring condition, controlling reaction temperature, adding the adjusted magnesium-aluminum mixed solution and a sodium carbonate solution in a certain proportion into a synthesis reaction kettle in a parallel flow manner, controlling the pH value of the system by using the sodium carbonate solution so as to perform hydrotalcite synthesis reaction, and then performing aging, filtering, washing, drying and smashing procedures to obtain hydrotalcite. The invention further discloses further modification of the obtained hydrotalcite, so as to improve the usability and the economical benefit of a product. The treatment method of the aluminum-containing waste acid is high in economical benefit, thorough in treatment and safe to recycle.

The invention discloses a sulfur-based autotrophic microorganism nitrogen removal material as well as a preparation method and an application method thereof. The autotrophic nitrogen removal material is a particulate matter obtained by mixing a sulfur-containing raw material with lime powder and then carrying out melting, forming and surface carbonation. The autotrophic nitrogen removal material disclosed by the invention is used as a filler of an anaerobic biological filter to construct a deep anaerobic biological filter bed, the nitrogen content of 25mg/L nitrate and nitrite can be reduced to be less than 5mg/L under the conditions that the hydraulic retention time is 40-60min at a proper temperature, the material disclosed by the invention is used for replacing an organic matter carbon source such as sodium acetate for nitrogen removal by denitrification, and the nitrogen removal cost is saved by more than 50%.

The invention provides a semi-underground forest protection hut and belongs to the building field of house building. A floor, walls and a roof of the hut are all composite wallboards which are the same in structure and different in thickness. The lower half part of the hut is buried underground. One side wall of the part, located on the ground, of the hut is provided with an entrance door and a window which are opened inwards. The outer side of the entrance door is provided with a rain blocking stone higher than the ground. The roof of the hut is horizontally provided with a heat isolation and heat preservation layer which is provided with an arc dome with the middle being high and the edges being low. A cavity formed between the arc dome and the heat isolation and heat preservation layer is filled with a filling body formed by dry branches and fallen leaves. Each composite wallboard is of a multilayer structure and is sequentially provided with an adobe layer, a saw powder filling layer, a steel plate layer and a board layer from outside to inside. The semi-underground forest protection hut is firm and durable, effectively solves the dampproof and heat preservation problems and can effectively prevent spiders, insects, snakes and the like from entering the hut.

The invention provides a modified silicate grounding module group and a manufacturing method and a manufacturing mold thereof. The module group comprises grounding modules which are sequentially connected through connecting wires, wherein each module comprises a metal core material and a modified silicate composite layer coating the metal core material, and the upper end of the metal core materialpenetrates through the modified silicate composite layer and is connected with the connecting wire through a connecting piece. According to the technical scheme provided by the invention, the grounding modules formed by the metal core material and the composite layer are sequentially connected to form the grounding module group; the hygroscopicity and adhesiveness of the composite layer are better than those of metal, and the compactness of the composite layer bonded with soil is better than that of the metal, so that the contact resistance between the grounding module group and the soil andthe grounding resistance of the grounding module group are reduced; and the composite material can play a role in protecting the metal, so that the corrosion of the metal is avoided, the corrosion resistance of the whole grounding module group is improved, and the service life of the grounding module group is greatly prolonged.