70results about How to "Hinder contact" patented technology

The invention relates to the field of coatings and particularly relates to an aqueous composite zinc-aluminum anticorrosion coating. The aqueous composite zinc-aluminum anticorrosion coating comprises, by weight, 40-65 parts of zinc-aluminum alloy powder, 2-5 parts of a passivating agent, 10-18 parts of a binder, 25-45 parts of a dispersing agent, 0.5-5 parts of a wetting agent, 5-15 parts of a filler, 0.5-2 parts of an additive and 100 parts by weight of a solvent. The filler comprises one or more of nano-silica, nano-titanium dioxide, nano-zinc oxide, modified graphene, nano-alumina, mica powder, talc powder, calcium carbonate, barium sulfate, kaolin, aluminum silicate and nano-cerium oxide. The solvent is a mixture of ethanol and water. The content of ethanol is 20wt% to 50wt%.

The invention proposes a silicon negative electrode lithium ion battery non-aqueous electrolyte, a lithium ion battery negative electrode and a lithium ion battery comprising the negative electrode. The non-aqueous electrolyte comprises a lithium salt, a non-aqueous solvent and a film formation additive, wherein the film formation additive is silane having a structure shown in a formula (1), the formula (1) is shown in specification, M is chained alkyl-Cn<1>H<2n1+1>, and R1, R2 and R3 are same and are one of -C1, -F, chained alkoxy-C<n2>H<2n2+1>O and amino-H<2>N(CH<2>)<n3>; or the M is chained amino-H<2>N(CH<2>)<n1'>, the R1, the R2 and the R3 are same and are one of -C1, -F and chained alkoxy-C<n2>H<2n2+1>O, 1<=n1<=20, 3<=n1'<=20, 1<=n2<=4, and 2<=n3<=15. By adding the silane film formation additive with the structure into the electrolyte, the problem of film breakage due to a volume expansion effect of the silicon negative electrode in an existing lithium ion battery is solved.

The invention discloses a high-stability perovskite solar cell, and relates to the technical field of solar cells. The solar cell comprises an FTO glass substrate, a TiO2 compact layer, a perovskite absorption layer, an interface modification layer, a hole transport layer and a counter electrode, which are laminated from bottom to top. According to the method, the interface modification layer is added to the interface of the perovskite and organic hole transport layer Spiro-OMeTAD, and sodium dodecyl sulfate is selected as the interface modification material. On the one hand, the sodium dodecyl sulfate has a long alkyl chain, can be greatly dissolved in isopropanol and other solvents which do not damage a perovskite thin film and can form a layer of crossed net structure on the surface ofthe perovskite thin film to enhance the hydrophobicity of the perovskite thin film; and on the other hand, due to the charged property of a molecular terminal sodium sulfonate group, the molecular polarity is enhanced, so that the solubility of molecules in chlorobenzene is reduced, a dipolar distance is easily formed between the molecules and the surface of the perovskite, the extraction of a charge interface is facilitated, and the efficiency stability of the perovskite solar cell is improved.

The invention provides corrosion-resistant graphene industrial coating as well as a preparation method and application thereof and relates to the technical field of coating. The corrosion-resistant graphene industrial coating is mainly prepared from the following raw materials in parts by mass: 450-550 parts of acrylic resin, 20-80 parts of a graphene-zinc nano composite, 150-200 parts of deionized water and 200-300 parts of pigments and fillers, wherein the graphene-zinc nano composite is formed in a way that nano zinc particles grow and are reduced in situ on the surface of graphene oxide, and the technical problem that existing corrosion-resistant coating can not effectively reduce contact of oxygen and metal is solved. The corrosion-resistant graphene industrial coating prepared by synergism and coordination of the acrylic resin, the graphene-zinc nano composite as well as the pigments and fillers not only has high mechanical strength, good dispersion stability and long storage stable stage but also can effectively slow down the contact of oxygen and metal, effectively lower corrosion generation speed and provide effective protection for the metal.

A cooling assembly for a turbine outer ring comprises a turbine box, a suspension connection piece, an outer ring and an impact plate. An air inlet hole and a throttling air outlet hole which are connected with an air source are defined in the suspension connection piece. The suspension connection piece is coupled onto the turbine box to form a first cavity with the turbine box. The outer ring is coupled to the suspension connection piece and forms a second cavity with the suspension connection piece. A plurality of impact holes are defined in the impact plate, the impact plate is connected onto the outer ring in the second cavity to divide the second cavity into a second outer cavity and a second inner cavity, and a plurality of winding channels are defined by the outer ring. Therefore, air flow from the air source enters the first cavity through the air inlet hole, enters the second outer cavity through the throttling air outlet hole, then enters the second inner cavity from the impact holes in the impact plate to impact the outer ring and finally flows out from the plurality of winding channels of the outer ring to form a cooling air film. The winding channels are favorable for improving a heat exchange effect of the cooling air flow in a base body of the outer ring.

The invention discloses a graphene-polyaniline modified carbon nanotube compound and a preparation method thereof. The preparation method comprises the following steps of dispersing graphite oxide in deionized water, adding a hydrochloric acid doped polyaniline modified carbon nanotube, reacting to obtain a reactant and filtering, washing, and drying the reactant to obtain the graphene-polyaniline modified carbon nanotube compound. Modified carbon nanotubes are interspersed among graphene sheets and thus the connection among the sheets is isolated and the problem that graphene is easily stacked is solved. By coating grapheme with the modified carbon nanotube through a physical method, the excellent electrical performance of graphene is maintained and the Pi-electron delocalization of the graphene conjugated planes cannot be hindered. By adding the compound into a polymer, the dielectric constant can be effectively increased, the electric conductance loss caused by the mutual contact among the graphene sheets is significantly decreased and the preparation method has obvious advantage in preparation of a composite material having both high dielectric constant and low dielectric loss. The preparation method of the compound has the characteristics of short period, simplicity in process and environment friendliness.

The invention discloses an anti-pollution nanofiltration membrane based on tannic acid multi-layer assembly, wherein the nanofiltration membrane comprises a support layer and a separation layer; the separation layer is composed of a tannic acid / Fe3+ compound layer and a polysulfobetaine zwitterionic polymer layer. The preparation process comprises the following steps: preparing a PSBMA solution; assembling the Fe3+ and tannic acid through coordination interaction in order to form a tannic acid / Fe 3+ compound layer on the polyacrylonitrile ultrafiltration membrane; and then assembling the PSBMAand tannic acid through electrostatic interaction to form the PSBMA zwitterionic polymer layer. According to the invention, tannic acid and different substances have multiple interaction capabilities, and different functional molecules are introduced into the preparation process of the nanofiltration membrane by utilizing multiple layer-by-layer assembly, so that the nanofiltration membrane is endowed with multiple properties, including good nanofiltration separation performance and anti-pollution performance of the membrane. The whole preparation operation process is completed within severalminutes, and the method has the characteristics of convenience, quickness and low cost.

The invention discloses an anticorrosive paint for building materials. The anticorrosive paint is prepared from the following raw materials in parts by weight: 40-50 parts of modified acrylic emulsion, 0.8-1 part of modified graphene, 9-13 parts of titanium dioxide, 8-10 parts of talcum powder, 1.2-1.6 parts of an antirust additive, 5-6 parts of an assistant and 20-30 parts of deionized water. Theinvention also discloses a preparation method of the anticorrosive paint. Modified acrylic emulsion is used as a film-forming substance of the paint, so that the paint not only has a good film-forming property and adhesive force, but also has excellent water resistance and aging resistance. By adding the antirust additive, an antirust effect can be achieved, and a corrosion inhibition function isachieved. Modified graphene is added to serve as an excellent shielding layer, so that the contact between building materials and a corrosive medium is prevented, and the corrosion resistance is enhanced. The paint is better combined with a matrix, and plays corresponding effects more easily. The aqueous anticorrosive paint has an excellent comprehensive performance and is suitable for protectingmetal building materials.

The invention discloses a three-layer enveloping type high-water-absorption slow release fertilizer and a preparation method thereof. The slow release fertilizer is composed of a fertilizer core and enveloping layers, wherein the enveloping layers comprise an inner enveloping layer, a middle enveloping layer and an outer enveloping layer from inside to outside; the inner enveloping layer is made from paraffin; the middle enveloping layer is made from straw carbon based high-water-absorption resin; and the outer enveloping layer is arranged as a styrene-acrylic emulsion layer. In the aspect of enveloping material selection of the slow release fertilizer disclosed by the invention, the paraffin, the straw carbon based high-water-absorption resin and the styrene-acrylic emulsion are respectively selected as the materials of the innermost layer, the middle layer and the outmost layer; the functions of all the enveloping layers are different from each other; the acquired enveloping fertilizer has excellent slow release property, high water absorption property and storage property; the straw gasified by-product is added and compounded with the high-water-absorption resin in the middle layer, so that the cost of the high-water-absorption resin is lowered; and in a preparation process of the slow release fertilizer, no organic solvent is used, the preparation is pollution-free and the process is simple.

The invention discloses a bis(1-chloro-N-methylmorpholine onium-2-hydroxy propyl) n-octadecane amine quaternary ammonium salt and a preparation method thereof. The method comprises the steps of firstly adding octadecylamine and absolute ethyl alcohol to a reactor, dropwise adding epoxy chloropropane and fully stirring for reflux reaction and carrying out reduced pressure distillation and acetone washing to obtain bis(1-chloro-2-hydroxy propyl) n-octadecane amine; and adding the bis(1-chloro-2-hydroxy propyl) n-octadecane amine, N-methylmorpholine and the absolute ethyl alcohol to another reactor, carrying out full reflux reaction, distilling out ethyl alcohol, carrying out isooctane washing, placing precipitated crystal, carrying out recrystallization by using acetone and carrying out vacuum drying to obtain a target product. An intermediate is synthesized from octadecylamine and epoxy chloropropane as initiators and the absolute ethyl alcohol as a solvent, and a symmetric biquaternary ammonium salt compound is obtained through quaternization, so that penetration of a hydrophobic group and a hydrophilic group into a lipoid layer and a protein layer of a somatic cell separately is facilitated to cause enzyme inactivation and protein denaturation, and the bis(1-chloro-N-methylmorpholine onium-2-hydroxy propyl) n-octadecane amine quaternary ammonium salt has relatively high bactericidal ability.

The invention discloses an antiwear honeycomb type denitration catalyst for reducing the SO2 oxidation rate and a preparation method thereof. The preparation method comprises the following steps that a titanium source precursor is dissolved in acid to form a solution; a molybdenum source precursor, a phosphorus source precursor and a magnesium source precursor are respectively dissolved to form solutions; the solutions are uniformly mixed; the pH value is regulated; precipitation and filtering are performed; then, deionized water and a vanadium source precursor solution are added; after being uniformly mixed, the mixture is directly dried, roasted and ground into powder; an extrusion aid and a solution formed by the molybdenum source precursor and a pore-forming agent are added into the powder; water is added while the stirring is performed until the paste shape is formed; then, nano-silicon dioxide, wollastonite, glass fiber and an adhesion agent are added and are uniformly mixed; a honeycomb type blank is extruded by an extruder; the dried blank is firstly put into a silicon source precursor solution to be soaked; after roasting, the finished product is obtained. The defects of active instability, poorer antiwear performance and unbalanced active center of the denitration catalyst in the flue gas in the prior art can be overcome.

The invention relates to a method for improving the dimensional stability of fast-growing wood, in particular to a method for improving the size stability of fast-growing wood through lignin-based modified liquid medicine, and aims to solve the problem that existing fast-growing wood is low in the dimensional stability. The method comprises the following steps: 1, pretreating industrial lignin; 2, preparing activated lignin; 3, preparing a lignin-based modified liquid medicine; and 4, treating wood through the lignin-based modified liquid medicine. The method is used for improving the dimensional stability of the fast-growing wood through the lignin-based modified liquid medicine.

The invention discloses a motor vehicle antifreeze fluid and a preparation method of the motor vehicle antifreeze fluid, and belongs to the field of auto accessories. A slow corrosion inhibitor is prepared from waste cooking oil through the processes of pretreatment, quaterisation reaction and the like, an imidazoline intermediate is obtained through the reaction of the slow corrosion inhibitor and hydroxyethyl ethylenediamine at the high temperature, an imidazoline quaternary ammonium corrosion inhibitor is obtained after the quaterisation of the imidazoline intermediate through benzyl chloride, an imidazole ring and a polar group in the molecule interact, the imidazoline quaternary ammonium corrosion inhibitor is preferentially adsorbed onto the surface of metal in the adsorption and isfavorable for forming a stable protection film on the surface of the metal, moreover, a dense hydrophobic film is formed far from the surface of the metal due to the free moving and extending of a hydrophobic branch and hinders the contact between a corrosive medium and a metal matrix, and the effect of relieving the metal corrosion is achieved. The motor vehicle antifreeze fluid solves the problems that the motor vehicle antifreeze fluid corrodes a metal part in the use process and also forms a scale easily at present.

The invention relates to a sensor assembly that can prevent the reliability of a magnetic sensor circuit from being lowered, and a method for manufacturing the sensor assembly. A first holder part (40) has a first holder side wall (44) protruded from a first holder base part (42). The first holder side wall (44) is a thin plate member protruding to a second holder part (50) side, from a first holder main surface (42a) of the first holder base part (42) that faces a base plate (62). The first holder side wall (44) is provided to each side of the first holder base part (42) in the width direction W of the base plate (62). The first holder side wall (44) is inclined to the inner side of the base plate (62) in the width direction W until it becomes in contact with an end surface (54b) of a small base part (54) of a second holder part (50). A first holder side wall outer surface (44a), which is the outer surface of the first holder side wall (44) in the width direction W, is in contact with a case (20).

The invention provides a curcumin multilayer emulsion with a colon-targeted delivery function, and a preparation method and application thereof. The curcumin multilayer emulsion is prepared by using amedium-chain triglyceride solution in curcumin as an oil phase, using whey protein isolate as an emulsifier and an inner-layer polyelectrolyte, using chitosan as a second-layer polyelectrolyte and using carboxymethyl konjac glucomannan as an outer-layer polyelectrolyte through an electrostatic layer-by-layer self-assembly technology. The curcumin colon-targeted delivery multilayer emulsion provided by the invention has the advantages that the particle size is small; the dispersity and the storage stability are high; the release amount in simulated gastric fluid is low; the release amount in simulated colon fluid containing beta-mannase is high; and good colon-targeted delivery performance is realized. In vivo evaluation results show that the bioavailability of the curcumin after the multilayer emulsion is formed is obviously improved, so that the curcumin multilayer emulsion provided by the invention can be used as a curcumin colon-targeted delivery system.

The invention discloses a film coating fresh keeping agent for cherries, as well as a preparation method and an application method of the film coating fresh keeping agent. The film coating fresh keeping agent comprises 20-30wt% of phenyllactic acid concentrate, 1-1.5wt% of carboxymethyl chitosan, 0.3-0.5wt% of glacial acetic acid, 1-2wt% of edible glycerine and 66-77wt% of water, wherein the phenyllactic acid concentrate is prepared through the following steps of inoculating MRS culture mediums with addition of 0.3wt% sodium phenylpyruvate, with lactobacillus plantarum LD1.0001 as raw materials, and performing fermentation, and the content of phenyllactic acid is 20.0g / kg or above. The invention also relates to the application method of the film coating fresh keeping agent. The applicationmethod comprises the following steps of placing the prepared film coating fresh keeping agent for cherries in a film coating trough of cherry precooling and sorting film coating equipment, immersingthe precooled and sorted cherries into the fresh keeping agent for 1-2min, performing cold air drying on the cherries after film coating, performing loading into an expandable polystyrene packing boxin which absorbent paper is matted, and placing the expandable polystyrene packing box into a freezer of minus 1-1 DEG C for preservation. Compared with the fresh keeping time of the cherries by an ordinary low-temperature fresh keeping method, the fresh keeping time of the cherries which are subjected to low-temperature fresh keeping by using the film coating fresh keeping agent for cherries is prolonged by 20 days or above, and the film coating fresh keeping agent disclosed by the invention belongs to a fresh keeping method which is safe, efficient, simple in operation and low in cost.

The invention provides a fumigating box and an electric fumigating oven with the fumigating box, belongs to the technical field of electric fumigating ovens, and aims to solve the technical problems that the fume supply time is shortened, a relatively great amount of materials can be consumed, and the like as the flowing speed of fume generated from a fume generator of a conventional fumigator is too high. The fumigating box comprises a box body and a box cover, wherein a material storage cavity for accommodating a fume generating material is formed inside the box body; the top surface of the box body is opened; the box cover is detachably connected onto the top of the box body and is used for sealing the opening of the box body; a fume storage cavity is formed inside the box cover; fume inlets for communicating the fume storage cavity with the material storage cavity are formed in the bottom surface of the box cover; fume outlets communicated with the fume storage cavity are formed in the top surface of the box cover; a fume baffle structure for retarding fume in the fume storage cavity from being discharged out is arranged inside the box cover. By adopting the fumigating box and the electric fumigating oven, the utilization rate of a fume generating material can be effectively increased.

The invention discloses a zinc-aluminum-magnesium plating layer surface treating agent as well as a preparation method and a use method thereof, and belongs to the technical field of zinc-aluminum-magnesium alloy plating layer steel plate surface treatment. In order to meet the requirements of household appliances and automobile users on blackening resistance and environmental friendliness of hot-dip galvanized aluminum-magnesium alloy coated steel plates, the invention provides a zinc-aluminum-magnesium plating layer surface treating agent which comprises 1-5 parts of fluoride, 3-10 parts ofperiodate, 0.5-5 parts of weakly alkaline medium, 20-50 parts of water-based organic resin, 5-15 parts of colloidal silicon dioxide and 100 parts of water. Fluoride and periodate react with Mg on thesurface of a plating layer under the weak alkaline condition to generate a compact film layer, water-based organic resin adheres to the surface of the plating layer, gaps are filled with colloidal silicon dioxide, contact between the plating layer and water vapor and oxygen in the environment is effectively hindered, and the corrosion resistance, blackening resistance, water resistance and fingerprint resistance of the surface coating are remarkably improved.

The invention discloses a honeycomb-type vanadium-free denitrification catalyst for reducing the SO2 oxidation rate and a preparation method thereof. The preparation method comprises the following steps that a titanium source precursor is dissolved in acid to form a solution; a tungsten source precursor, a phosphorus source precursor and a magnesium source precursor are respectively dissolved to form a solution; the solutions are evenly mixed, a pH value is regulated to 7-12, precipitation and filtration are performed, then deionized water and a rare earth precursor solution are added, drying and calcination are performed directly after even mixing, and the mixture is grinded into powder; a solution prepared by an extrusion additive and the tungsten source precursor and a pore forming agent are added in the powder, water is added while stirring to form paste, then nano silica, glass fiber and a binder are added and are evenly mixed, and a honeycomb-type blank is extruded out by utilizing an extruding machine; the dried blank is firstly put in a silicon source precursor solution for impregnation, and a finished product is obtained after calcination. The prepared honeycomb-type vanadium-free denitrification catalyst overcomes the defects of active center imbalance and unstable activity of a denitrification catalyst in flue gas in the prior art.

The invention discloses a preparation method and application of a sodium alginate / chitosan / glucosyl-beta-cyclodextrin composite film. The composite film is applied to fresh food preservation, and a blending film-forming solution for film preparation comprises the following components in percentage by concentration: 1.5 to 3.5% of SA, 0.3 to 0.7% of CS, 0.3 to 0.7% of Glc-beta-CD and 0.4 to 0.8% ofGL. According to the invention, electrostatic interaction of chitosan and sodium alginate and hydrogen-bond interaction of glucosyl-beta-cyclodextrin are utilized for blending modification, and thena crosslinking reaction between a CaCl2 solution and a polysaccharide composite film is utilized for chemical modification, so the comprehensive performance of the polysaccharide film is remarkably improved, and the application prospect of the polysaccharide film is promoted.

The invention provides a circuit board tin spraying system and a tin spraying method thereof. The system includes a tin furnace, a conveying tin spraying furnace and a leveling device, wherein the conveying tin spraying furnace is disposed in a space corresponding to a tin tank of the tin furnace, the conveying tin spraying furnace has a tin spraying tank and includes a conveying module disposed in a space corresponding to the tin spraying tank, and a tin spraying module connecting the tin tank and the tin spraying tank, when the tin tank contains tin liquid, the tin spraying module can suck the tin liquid from the tin tank and spray the sucked tin liquid in the tin spraying tank, so the tin spraying tank is filled with the tin liquid to form the tin liquid environment, a substrate can beunidirectionally pulled by the conveying module to pass through the tin liquid environment to make the tin liquid infiltrate the substrate, and the leveling device is configured to spray hot liquid tothe substrate as the substrate is drawn out of the tin liquid environment to pass through the leveling device.

The invention relates to a preparation method of hemp fiber sound insulation cotton, and belongs to the technical field of sound insulation material preparation. The preparation method comprises the following steps: taking hemp leaf residues and hemp stalks as raw materials to obtain plant fibers, mixing the plant fibers and ethyl silicate, dropwise adding alkaline water to react, calcining and grinding after the reaction is completed to obtain an initial body, finally mixing the initial body with an organic compound, fibers and other auxiliaries, hot-pressing, and drying to obtain the hemp fiber sound insulation cotton. According to the invention, fiber molecules in hemp are extracted and separated by adopting an acid soaking method, and then fiber tubes and fiber pores are filled with metal elementary substances, so that the mechanical strength and the aging resistance of the sound insulation cotton are improved; the ethyl silicate is mixed into the hemp fibers, so that the silicon dioxide grows on the rough surfaces of the hemp fibers, the hemp fibers have the stability and rigidity of the silicon dioxide, the mechanical strength, the flame retardance and the durability of the sound insulation cotton are further improved, and the sound insulation cotton has wide application prospects.

The present invention discloses a SO2 oxidation rate reducing honeycomb type vanadium-free flue gas denitration catalyst and a preparation method thereof. The preparation method comprises: dissolving a titanium source precursor in an acid to form a solution; dissolving a tungsten source precursor to form a solution; uniformly mixing the two solutions, adjusting the pH value to 7-12, precipitating, filtering, adding deionized water and a rare earth precursor solution, uniformly mixing, directly drying, roasting, and grinding to obtain powder; adding the solution formed from an extrusion aid and the tungsten source precursor and a pore forming agent to the powder, adding water while stirring to form a paste, adding nano-silica, glass fiber and a binder, uniformly mixing, and extruding a honeycomb type billet by using an extruder; and placing the dried billet into a silicon source precursor solution, impregnating, and roasting to obtain the finished product. According to the present invention, the defects of unbalanced activity center, poor molding property and unstable activity of the denitration catalyst in the flue gas in the prior art can be overcome.

The invention provides a curcumin double-layer emulsion with a colon-targeted transit function and a production method and application of the curcumin double-layer emulsion with the colon-targeted transit function. According to the curcumin double-layer emulsion with the colon-targeted transit function and the production method and application of the curcumin double-layer emulsion with the colon-targeted transit function, a whey protein isolate solution is adopted as an emulsifier, carboxymethyl konjac glucomannan is adopted as an outer-layer polyelectrolyte, and by means of a static layer-by-layer self-assembly technology, the curcumin double-layer emulsion is produced. The production method is simple in process, by changing a system pH value, a ratio of protein to a polysaccharide, the dosage and the like, properties of the emulsion can be controlled, and the stability of the emulsion is improved. According to the produced curcumin double-layer emulsion, not only are the advantages of emulsions, which are produced by using protein and a polysaccharide as interface layers respectively, combined, but also adverse effects, caused by environments, on curcumin can be avoided; and therelease amount in simulated gastric fluid is low, while the release amount in simulated colon fluid containing beta-mannase is high, thus the produced curcumin double-layer emulsion has excellent colon-targeted transit performance, the bioavailability of the curcumin is greatly improved, and application ranges of the curcumin in the fields of food, medicines and the like are effectively extended.

The invention belongs to the technical field of solar cells, and particularly relates to a design for improving the stability of a perovskite solar cell module. The battery module is divided into a single-junction battery module, a double-junction battery module and a three-junction battery module, and compact layers are arranged in all the battery modules; each compact layer is located on a patterned perovskite layer, an electron extraction layer and a hole extraction layer, has good continuity and compactness, can perform shape-preserving growth on the patterned substrate to realize complete coverage, and has good electron transmission characteristics and conductivity, so that the normal ohmic contact between an electrode and a conductive film during series connection of the modules can be guaranteed. According to the present invention, the contact between the perovskite layer and the air and the metal electrode can be effectively blocked through the introduction of the compact layers, and when the compact layersare applied to the double-junction and three-junction perovskite laminated solar cell module groups, the introduction of the compact layers can effectively reduce a leakage current caused by the direct contact of a tunneling composite layer and the electrode, and finally the stable perovskite solar cell modules can be obtained.

The invention discloses a vanadium-free denitration catalyst for reducing SO2 oxidization rate and a preparation method thereof. The preparation method comprises the following steps of: (1) dissolving a titanium source precursor into an acid to form a solution; (2) dissolving a rare earth precursor and a co-catalytic component precursor formed by one or two of a tungsten source precursor and a molybdenum source precursor to form a solution and uniformly mixing the solution with the solution in the step (1); (3) adjusting the pH value of the solution which is uniformly mixed in the step (2) to 7-12, and precipitating, filtering, washing, drying and the roasting the solution, and grinding the precipitate to powder; (4) mixing the powder in the step (3) with one of the tungsten source precursor solution or the molybdenum source precursor solution to slurry, stirring the mixture, adding a pore forming material, and uniformly mixing the mixture and drying the same; and (5) immersing the dried product in the step (4) in a silicon source precursor solution, and then drying and roasting the mixture to form the denitration catalyst. The vanadium-free denitration catalyst disclosed by the invention can overcome the defects that in the prior art, the active centre of the denitration catalyst in flue gas is unbalanced and the activity is unstable.

A preparation method of a honeycomb flue gas denitrification catalyst capable of reducing activation temperature and SO2 oxidation rate comprises the following steps: dissolving a titanium source precursor into acid to form a solution; dissolving a molybdenum source precursor and a phosphorus source precursor to form solutions; uniformly mixing the solutions, adjusting the pH value to 7-12, precipitating, filtering, then adding deionized water, a vanadium source precursor solution, uniformly mixing, directly drying, roasting, and grinding into powder; adding an extrusion aid, the solution formed by the molybdenum source precursor and a pore-forming agent into the powder, adding water while stirring, blending into a paste, then adding nanometer silicon dioxide, glass fiber and a bonding agent, uniformly mixing, extruding into a honeycomb blank by using an extruder, impregnating the dried blank into a silicon source precursor solution, and roasting to obtain a finished product. The invention aims to overcome the defects that in the prior art, the denitrification catalyst is unbalanced in active centers in flue gas, high in SO2 oxidation rate and poor in poisoning resistance.

The invention discloses a method for synthesizing an intermediate N-[2-(2-hydroxyethyl)ethylsulfonyl]-4-nitrobenzenesulfonamide. 4-nitrobenzenesulfonyl chloride, 2-amino-2-hydroxydiethyl sulfide, hydrogen peroxide, tungstic acid, titanium isopropoxide, glacial acetic acid and urea are used as main raw materials. The synthesis method comprises the following steps: the 4-nitrobenzenesulfonyl chloride, 2-amino-2-hydroxydiethyl sulfide undergo an amidation reaction under the action of a catalyst, and the obtained reaction product is oxidized by the hydrogen peroxide to obtain the intermediate product. The surface of the catalyst is negatively charged, so reactant molecules undergo a hydrolysis reaction, and the isomerization reaction is reduced, thereby the yield of the product is obviously improved.

The invention relates to a preparation method of a flame-resistant aging-resistant sound-absorbing cotton, and belongs to the technical field of sound absorbing material. According to the preparationmethod, corn leaf and stalk are taken as raw materials so as to obtain a filter cake; the filter cake is mixed with tetraethyl orthosilicate, ammoniacal liquor is added dropwise so as to obtain a reaction product, calcining is carried out, and an obtained prefabricated product is grinded, and at last, the prefabricated product, an organic compound, fiber, and other auxiliary agents are subjected to mixing hot pressing and drying so as to obtain the flame-resistant aging-resistant sound-absorbing cotton. According to the preparation method, an acid solution is adopted for immersion separation of fiber molecules, so that fiber surface roughness is increased, fiber tubes and fiber apertures are filled with aluminium element, sound-absorbing cotton mechanical strength and aging resistance areimproved; plant fiber and tetraethyl orthosilicate are mixed, so that growth of silica on plant fiber surface is realized; utilization of the stability and the rigidity of silica is capable of improving the mechanical strength, the flame resistance, and the endurance of sound-absorbing cotton obviously, and the application prospect is promising.

The invention discloses a special water-based antirust liquid for aluminum and a preparation method of the of special water-based antirust liquid. The special water-based antirust liquid for aluminum is composed of the following components in parts by weight: 0.01-5 parts of a dispersing agent, 0.01-10 parts of an alkaline agent, 0.01-5 parts of fatty acid, 0.01-10 parts of a film-forming agent, 0.01-5 parts of an aluminum corrosion inhibitor, 0.01-0.2 part of a defoaming agent and 50-90 parts of deionized water. The special water-based antirust liquid for aluminum provided by the invention not only has excellent alkali corrosion inhibition performance on aluminum materials, but also can ensure that no white hair corrosion phenomenon is generated in the subsequent storage process, does not contain nitrite, chromate, heavy metal and other harmful substances, is safe and environment-friendly, and meets the RoSH 2.0 instruction.