66 results about "Acid substances" patented technology

The utility model relates to the technical field of water treatment equipment, in particular to a water path system for a mineral spring water purifier and the mineral spring water purifier. The waterway system for the mineral spring water purifier comprises an alkaline filter material, an acidic filter material and a mineralized waterway, wherein the alkaline filter material and the acidic filter material are sequentially arranged in the mineralized water path, or the acidic filter material and the alkaline filter material are sequentially arranged in the mineralized water path. Compared with the prior art, the alkaline filter material is matched with the acidic filter material, so that the release of mineral substances in the alkaline filter material can be promoted by using acidic substances released by the acidic filter material, or the release of the mineral substances in the acidic filter material can be promoted by using alkaline substances released by the alkaline filter material; therefore, the problem that the content of mineral substances in the water body provided by the mineral spring water purifier does not reach the standard can be solved.

The invention relates to a heat preservation container and a manufacturing method thereof.The heat preservation container comprises a non-metal container body, a metal sealing component and a first connecting solder layer, the non-metal container body comprises a shell and an inner container, the top ends of the shell and the inner container are fixedly connected in a sealed mode, and a vacuumizing opening is formed in the end face of the bottom end of the shell; the metal sealing component is of a hollow structure with one end open and the other end closed in the circumferential direction, and the open end of the metal sealing component is an annular embedding end which is matched with the vacuumizing opening in shape and can be inserted into the vacuumizing opening in a clearance fit mode. The first connecting solder layer is arranged between the outer wall of the annular embedded end and the inner wall of the vacuumizing opening, and the non-metal device body and the metal sealing component are connected through the first connecting solder layer. According to the heat preservation container, the shell and the inner container are integrally formed and manufactured through the non-metal materials which are not prone to being corroded by acidic substances, the problems that the metal materials are prone to being corroded by the acidic substances and the surface layers are prone to being scratched in the cleaning process are solved, and the heat preservation container can store the acidic substances while improving the heat preservation and cold preservation effects.

The application discloses an electrolyte, a preparation method thereof and a lithium ion battery, and belongs to the technical field of batteries.The electrolyte comprises a lithium salt, a first additive, a second additive and a solvent; the first additive is a compound carrying an isocyanate substituent and a nitrile substituent in a molecular structure; and the second additive is a sulfur-containing heterocyclic compound.The first additive of the electrolyte can remove water and HF in the electrolyte, prevents HF from attacking CEI and causing transition metal dissolution of a ternary positive electrode material and destruction of a material structure; the nitrile substituent has extremely strong complexing force with transition metals, inhibits electrolyte oxidative decomposition and positive electrode transition metal element dissolution; the second additive has the advantages of impedance reduction and gas production inhibition but is prone to generating acidic substances; the first additive has water and acid removal functions and can inhibit the second additive from generating acidic substances; and the synergistic effect of the two additives can improve the compatibility of the electrolyte and the ternary positive electrode material and improve the electrochemical performance of the lithium ion battery.

The application discloses a production process of an ultra-low pressure reverse osmosis membrane, which comprises the following steps: preparing a support layer casting solution; uniformly coating the support layer casting solution on a polyester non-woven fabric, and then performing air drying and water washing; preparing a water phase casting solution and an oil phase casting solution, and adding an acidic substance in the water phase casting solution and the oil phase casting solution; the acidic substance is insoluble in water and only reacts with alkali, the reaction product is soluble in water, and the particle diameter of the acidic substance is 1-5 um; coating the water phase casting solution and the oil phase casting solution on the non-woven fabric with the support layer respectively, and then sequentially performing drying, acid washing, water washing, alkali washing, water washing and drying to obtain the ultra-low pressure reverse osmosis membrane. The application can provide a reverse osmosis membrane which has a stable structure, a relatively high desalination rate and a relatively large water flux.

The application discloses an electro-catalytic oxidation system and method and an ecological joint treatment method for in-situ remediation of water body sediments, which utilizes an intelligent pulse power controller to perform intermittent pulse electro-catalytic oxidation on the bottom mud at the water bottom, generates hydroxyl radicals through in-situ catalysis of an anode to degrade organic pollutants of the bottom mud, generates micro-bubbles in the interstices of the bottom mud through the electrolysis of water to improve the oxidation-reduction potential, and further reserves time for the soluble pollutants in the interstitial water of the bottom mud to sufficiently diffuse to the surface of the electrode, so as to avoid energy waste caused by concentration polarization. Through reverse power supply, the polarity of the anode and the cathode is instantaneously reversed, trace amounts of acidic substances and gas generated through in-situ electrolysis are utilized to strip off the calcium and magnesium scale attached to the surface of the cathode, and manual cleaning and maintenance under water are realized. In combination with the planting of submerged plants on the treated bottom mud, ecological joint treatment is realized, the root system of the submerged plants is utilized to perform long-term ecological fixation and water purification on the treated sediments.

To provide a kit for obtaining a foaming topical skin preparation that improves skin condition and has a pleasant feel. [Solution] The present invention provides a kit for obtaining a foaming topical skin preparation, which is obtained by mixing an acidic substance, a carbon dioxide generating substance that reacts with the acidic substance to generate carbon dioxide, a thickener, and water, and is characterized by the incorporation of two or more thickeners in combination.

The invention discloses an anti-oxidation acid-absorbing EVA photovoltaic film and a preparation method thereof.The anti-oxidation acid-absorbing EVA photovoltaic film comprises an EVA photovoltaic film body, the EVA photovoltaic film body comprises an anti-oxidation film, an acid-absorbing film, a photovoltaic base film and a color-stabilizing film, and the anti-oxidation film comprises 30-45 parts of nano zinc oxide dispersion liquid, 20-35 parts of nano silicon dioxide and 20-40 parts of an SF-based film; the acid-absorbing film comprises 25-35 parts of a polypropylene film, 25-35 parts of an alkaline metal compound, 25-35 parts of a modified acid-absorbing agent and 10-30 parts of nano magnesium oxide, and the photovoltaic base film comprises 50-70 parts of an ethylene-vinyl acetate copolymer, 20-35 parts of a modified polyurethane elastomer, 10-15 parts of a silane coupling agent, 0-5 parts of a peroxide cross-linking agent and 0-5 parts of a water vapor blocking agent. By arranging the acid absorbing film, the polypropylene film, the alkaline metal compound and the modified acid absorbing agent, acidic substances released after degradation after aging are subjected to a neutralization reaction, and the situation that the service life of equipment at the installation position is affected due to acidic corrosion is avoided.

The present application relates to a kind of high alkalinity wastewater pre-acidification treatment method and its processing device system, the treatment method includes: the nutrient substance is added to the wastewater to be treated and is adjusted to obtain adjusted water;Part of the adjusted water is returned to adjust and handle, another part is added to the nutrient substance and is pre-acidification treatment, obtain pre-acidification water;Pre-acidification water is treated by anaerobic purification, obtain anaerobic purification water;Anaerobic purification water is treated by aeration and sedimentation in turn, obtain treated water.The treatment method and its processing device system provided by the present application can regulate the metabolic activity of microorganism, reduce the inhibitory effect of wastewater alkalinity and metal ions on anaerobic microorganism, improve the anaerobic removal rate of anaerobic purification treatment, reduce the adding cost of acidic substance and nutrient substance.

This application relates to the field of food processing technology, specifically disclosing a freeze-resistant lava-filled popping bead, its preparation method, and its application. The freeze-resistant lava-filled popping bead comprises an inner core liquid, a popping bead wall material liquid, a curing liquid, and a storage liquid. The inner core liquid comprises the following raw materials in parts by weight: 80-120 parts white sugar, 3-6 parts calcium salt, 30-60 parts edible alcohol, and 41-68 parts water. The preparation method is as follows: white sugar, calcium salt, edible alcohol, and water are mixed until dissolved to obtain the inner core liquid; alginate, glycerin, pectin, and acidic substances are mixed with water until dissolved to obtain the popping bead wall material liquid; calcium salt, chitosan, and water are mixed evenly to obtain the curing liquid; fructose syrup, edible alcohol, and water are mixed evenly to obtain the storage liquid; the inner core liquid is added dropwise to the popping bead wall material liquid for a coating reaction; excess adhesive is filtered out and washed away; the bead is then placed in the curing liquid and the storage liquid in sequence; after packaging and high-temperature sterilization, the finished product is obtained. It has the advantage of bursting and lava-filled core when eaten frozen.

The application discloses a combustion-supporting and corrosion-preventing type colloidal magnesium-based heavy oil additive and a preparation method thereof. The heavy oil additive is prepared from the following components in parts by weight: magnesium oxide 50-80 parts, bentonite 10-15 parts, lime powder 5-10 parts, nano silicon dioxide 10-15 parts, basic copper chloride 5-10 parts, diaspore powder 10-15 parts, sodium dodecyl benzene sulfonate 2-8 parts, hydrocarbon solvent 2-8 parts, combustion-supporting dispersant 2-8 parts, and water 80-100 parts. The additive can inhibit the combustion of sulfur in the heavy oil to generate sulfur oxides, low-temperature sulfur corrosion and the synergistic corrosion of HCl. In the low-temperature section, the basic components such as lime powder react with HCl to generate salt compounds, neutralize the acidic substances in the flue gas, and significantly increase the pH value to above 8, thereby preventing the low-temperature dew point corrosion of the tail heating surface.

This invention discloses a method for preparing a tamarind polysaccharide-based phytate amine biochemical flame retardant hybrid flame retardant for rubber and plastics. Through molecular design, it fully utilizes the complementary advantages of biomass polysaccharides and phosphorus and nitrogen materials. Under heating conditions, it mediates the reaction between phytate amine and tamarind polysaccharide in an aqueous system. The active phosphate groups in phytate amine undergo esterification with the hydroxyl groups of polysaccharide, firmly grafting phytate amine onto the polysaccharide backbone through chemical bonds. A stable network structure is formed through multiple intermolecular hydrogen bonds, constructing a hybrid flame retardant system that integrates acid source, carbon source, and gas source functions. This flame retardant fully utilizes the ability of phytate amine to decompose and release acidic substances to catalyze char formation and generate non-combustible gases. Combined with the efficient dehydration and carbonization characteristics of tamarind polysaccharide, it can form a dense expanded char layer when heated, effectively isolating heat transfer and gas exchange, and significantly improving the thermal stability of the material.

The electrolyte comprises a functional additive A. The functional additive A contains an imidazole ring, a cyano group, an isocyanate group and the like and can be subjected to a reduction reaction on the surface of a negative electrode prior to an organic solvent to form a compact and stable solid electrolyte interface film (SEI) rich in organic and inorganic nitrogen components, and the solid electrolyte interface film can be applied to a lithium ion battery. Volume expansion and side reaction of the negative electrode at high temperature are effectively inhibited, and a negative electrode interface is protected; moreover, electron-rich groups in molecules of the functional additive A can efficiently capture trace water in the electrolyte and acidic substances generated by electrolyte salt decomposition, so that the acidity increase and chain decomposition of an electrolyte system are inhibited from the source, the high-temperature stability of an electrolyte body is improved, and the service life of the electrolyte is prolonged. Therefore, the electrolyte provided by the embodiment of the invention is suitable for a high-nickel and high-silicon battery system, and has excellent high-temperature cycle life and storage performance.

The invention discloses a wet deacidification process and device for fumed silica, and belongs to the technical field of deacidification. The middle lower end of the tank body is connected with a deacidification assembly; the deacidification assembly comprises an air inlet assembly, a material bearing assembly and a material discharging assembly, the air inlet assembly is fixedly connected with the tank body, the material bearing assembly is installed at the air outlet end of the air inlet assembly, the material discharging assembly is in attached sliding connection with a transverse hole formed in the bottom of the material bearing assembly, and the material discharging assembly is fixedly connected with the tank body; the middle lower end of the tank body is further connected with a feeding assembly, and the discharging end of the feeding assembly is movably connected with the material bearing assembly; a top cover is fixedly connected to the top of the tank body; a filtering assembly is fixedly connected to the top in the top cover. According to the method disclosed by the invention, the gas-phase white carbon black is in contact with water vapor, the water vapor penetrates through internal channels of the gas-phase white carbon black nanoparticles to carry out acidic substances on the surfaces of the gas-phase white carbon black nanoparticles, so that the acidic substances on the surfaces are removed, the deacidification process can be completed in a relatively short time through wet and hot air deacidification, and man-made impurities in a product are reduced.

The invention discloses an EGR valve, an engine and a vehicle, and belongs to the technical field of vehicles. The EGR valve comprises a valve body, and a waste gas channel is formed in the valve body. The protective layer is at least attached to a part of the inner wall of the waste gas channel, and the protective layer is made of a material which is not easy to react with acidic substances.

The invention provides a liquid moisture absorbent as well as a preparation method and application thereof, and belongs to the technical field of dehumidifiers. The liquid hygroscopic agent provided by the invention has good hygroscopicity and relatively low viscosity. Specifically, the polydimethylsiloxane affects the viscosity of the liquid moisture absorbent, the viscosity of the polydimethylsiloxane is reduced along with the reduction of the molecular weight, and the viscosity of the liquid moisture absorbent is regulated and controlled by controlling the molecular weight of the polydimethylsiloxane. According to the invention, the moisture absorbent has extremely strong alkalinity, and can react with acidic substances in water to form hydroxides, so that the moisture absorption function is realized; the defoaming agent can reduce and prevent liquid from generating foam. According to the invention, the leveling agent can reduce the surface tension of liquid and improve the leveling property and uniformity of the liquid.

The invention belongs to the technical field of regenerated rubber, and discloses desulfurized regenerated rubber with low acid waste gas emission and a preparation method thereof.The preparation method comprises the steps that waste rubber powder and a softening agent are mixed and stirred in a stirring machine, the temperature is increased to 100-150 DEG C within 1-3 min, after uniform mixing is conducted, the mixture enters a double-screw extruder through a continuous closed heat preservation conveying device to be subjected to a desulfurization reaction, and the desulfurized regenerated rubber with low acid waste gas emission is obtained; sodium bicarbonate and calcium oxide are added into the double-screw extruder through a side feeding device, the reaction condition is 200-350 DEG C, and after the reaction is carried out for 1-3 min, the desulfurized rubber is obtained through cooling. According to the present invention, the acid-base neutralization principle is utilized to directionally capture the acidic material generated by the reaction, such that the wear of the desulfurization equipment is effectively retarded, and the carbon dioxide generated by the reaction can effectively isolate the participation of oxygen so as to avoid the performance reduction caused by the oxidation of the rubber.

The utility model discloses a device for cleaning abietic acid in a pipeline in the technical field of waste gas treatment equipment, and aims to solve the problem of abietic acid cleaning residues in the pipeline in the prior art. The cleaning device comprises an air pipe, a cleaning liquid box, a sodium hydroxide medicine box, an air pump and a liquid pump, a liquid spraying pipe is installed in the air pipe, a plurality of first spraying heads are installed on the liquid spraying pipe, the liquid spraying pipe is communicated with the cleaning liquid box through a liquid supply pipe, and the liquid pump is used for supplying cleaning liquid in the cleaning liquid box to the liquid spraying pipe through the liquid supply pipe; and a communicating pipe is further arranged at the bottom of the air pipe and communicates with the cleaning liquid box, and a medicine supply device is arranged on the sodium hydroxide medicine box and used for supplying a sodium hydroxide solution to the interior of the cleaning liquid box. The device is suitable for removing abietic acid substances in the air duct, the spraying direction of a sodium hydroxide solution can be flexibly adjusted according to use requirements, the configuration mode is flexible and simple, the abietic acid substances located at spraying dead angles in the air duct can be removed easily, and the cleaning effect on the air duct is improved.

The invention discloses a programmable disintegration type signal substance-containing synergistic coated controlled-release material as well as a preparation method and application thereof, and belongs to the technical field of controlled-release fertilizer production. According to the invention, yeast cell wall-based polyester polyol and bio-based isocyanate react to construct a polyurethane main body structure. An acid-sensitive ketal cross-linking agent is introduced into a polymer network and is used for realizing acid catalytic fracture; meanwhile, a delayed acid precursor is introduced, and trace acidic substances are generated through self-decomposition of the delayed acid precursor so as to construct an internal chemical clock, so that the membrane material is subjected to structural collapse and rapid disintegration within a preset time. Chitosan or sodium alginate is adopted as a wall material to prepare microcapsules, nutrient signal substances are encapsulated and released after reaching specific time or being stimulated by root exudates, efficient absorption of crops to fertilizer nutrients is promoted, and ketal cross-linking bond breakage is synergistically accelerated. According to the invention, programmable disintegration, signal synergistic triggering and biodegradability of the coating material are realized, and the preparation method is suitable for preparation of green controlled-release film materials.

The utility model belongs to the field of phosphoric acid extraction, and particularly relates to a phosphoric acid extraction device which comprises a stirring tank, the top of the stirring tank is fixedly connected with a gas collection top cover, an inner cavity of the gas collection top cover is fixedly communicated with a first conveying pipe, one end of the first conveying pipe is fixedly connected with cooling equipment, and the other end of the first conveying pipe is fixedly connected with a second conveying pipe. And a fan is fixedly installed on one side of the cooling equipment, the output end of the fan fixedly communicates with a second conveying pipe, and a purification mechanism is arranged at one end of the second conveying pipe. According to the utility model, large-particle impurities in air are filtered through the particle filter plate, acidic substances in waste gas are filtered through the acidic filter plate, harmful microorganisms and peculiar smell in the waste gas are removed through the activated carbon plate, and finally the filtered gas is exhausted through the smoke exhaust pipe. The effects of integrating waste gas cooling, filtering, deacidification and spraying and improving the waste gas treatment efficiency in the phosphoric acid extraction process are achieved.

The invention discloses a liquid-phase vinyl chloride monomer dehydration and purification system and method based on aggregation-induced demulsification, the system is formed by connecting a deslagging device A, a pre-demulsification separation device B and a high-precision demulsification separation device C in series, the system can continuously operate under the pressure difference of 0.05-0.1 MPa, the water content of the monomer is reduced to 100 mg / L or below, and the influence of acidic materials and iron ions on polymerization is avoided. And while mechanical impurities and part of autopolymers are removed, emulsified water in the vinyl chloride monomer is efficiently removed in a pure physical manner, so that the purity of the monomer is improved, and the quality and performance of a downstream polyvinyl chloride product are further enhanced. The system adopts pure physical separation, is free of chemical agents and resistant to pollution and blockage, has the operating elasticity of 50%-200%, is suitable for a polyvinyl chloride device, improves the purity of monomers, and further enhances the quality and performance of downstream polyvinyl chloride products. The method solves the problems of high environmental protection and treatment cost pressure and high investment cost caused by the generation of strong corrosive waste alkali liquor in the traditional solid alkali method in the current vinyl chloride monomer dehydration.

The application discloses a preparation method of Mn-PBA electrode material, which comprises the following steps: (1) manganese acetate and sodium citrate are dissolved in deionized water to obtain solution A; potassium ferricyanide is dissolved in deionized water to obtain solution B; solution B is added into solution A under magnetic stirring; after stirring, aging is carried out at room temperature; (2) the product after reaction is washed with deionized water and ethanol several times in sequence; then, the product is dried overnight to obtain Mn-PBA powder; (3) an acid aqueous solution is added dropwise into Mn-PBA suspension to obtain a mixed solution, and the mixed solution is heated in an oil bath; the solution after oil bath heating is centrifuged and washed, and then is placed into an oven to be dried overnight to obtain Mn-PBA electrode material. The Mn-PBA electrode material with high electrochemical performance is prepared by adopting the co-precipitation method and acid etching method, the electrode material has a core-shell structure (cubic) with a hollow cavity, and the shell has through-hole pores; on the one hand, the electrode material exposes more reaction active sites (has rich active sites), so that the reaction activity of the electrode material is improved, and the reaction specific capacity is large; on the other hand, the volume expansion can be effectively buffered, so that the electrode material has good cycle stability.

The application belongs to the technical field of food processing, and particularly relates to an egg powder and a preparation method thereof. In view of the problems of low protein content and poor brewing performance of the egg powder prepared by the prior art, the egg liquid is first subjected to protease hydrolysis treatment, sugar addition and dispersion treatment to obtain high-temperature-resistant egg liquid, so as to improve the sterilization temperature of the egg liquid and ensure that the egg liquid does not form gel and does not produce fishy smell; then, the acid substance is added to the high-temperature-resistant egg liquid, and the high-temperature-resistant egg liquid is subjected to spray drying treatment after high-temperature short-time sterilization, so as to avoid the increase of the viscosity of the high-temperature-resistant egg liquid after sterilization, and the protein content and the brewing performance of the prepared egg powder are both significantly improved.

The application discloses a high-temperature acid mist recycling device and relates to the technical field of acid mist recycling, which comprises a cooling heat recovery device, a mechanical centrifugal separation device, a shell, a pure water spraying absorption device, an acid liquid recovery tank and the like. The mechanical centrifugal separation device separates liquid and gas through centrifugal force, separates acid mist droplets, and then makes the mist droplets fall back to be recycled through device oscillation, and recycles acidic gaseous substances through gas pressure, so that the separation and recycling functions are realized. The cooling heat recovery device cools high-temperature acid mist through a cooling liquid, recovers heat through the circulation of the cooling liquid, and the cooled mist droplets and acidic gaseous substances have a density greater than air, so that they fall in the device, thereby realizing the cooling and heat recovery functions. The pure water spraying absorption device realizes the dissolution of the acidic substances that are easily soluble in water and exist in the acidic gaseous substances through the circulation spraying of pure water, thereby realizing the absorption function.

This application provides a method for synthesizing tris(3,4-methylethyl) phosphate. The synthesis method includes the following steps: pretreating crude phenol distillation residue with concentrated sulfuric acid, then adding it to a distillation vessel for vacuum distillation to obtain a mixture containing 3,4-methylethylphenol; mixing the mixture containing 3,4-methylethylphenol with a first solvent for cooling crystallization, centrifuging and filtering to obtain 3,4-methylethylphenol; mixing the 3,4-methylethylphenol, phosphorus oxychloride and a catalyst to obtain a mixture of tris(3,4-methylethyl) phosphate; subjecting the tris(3,4-methylethyl) phosphate mixture to vacuum distillation to remove acidic substances and 3,4-methylethylphenol from the material to obtain crude tris(3,4-methylethyl) phosphate; mixing the crude tris(3,4-methylethyl) phosphate obtained in step (4) with a second solvent and distilling to obtain tris(3,4-methylethyl) phosphate. The method described in this application is simple, easy to operate, and has high added value, enabling comprehensive utilization of waste and providing certain economic benefits.

This application relates to the field of integrated circuit manufacturing and discloses a wafer processing technology, including: obtaining a wafer after back cleaning; cleaning the back side of the wafer with an alkaline solution to neutralize the acidic substances remaining on the back side of the wafer after back cleaning; and performing photolithography on the wafer after cleaning with the alkaline solution. This application cleans the back side of the wafer with an alkaline solution before performing photolithography on the back side of the wafer after back cleaning. The alkaline solution can neutralize the acidic substances remaining on the back side after back cleaning. Because the acidic substances remaining after back cleaning are neutralized and removed, even if there are chemical residues at the edge of the back side after photolithography, white crystal defects will not be generated at the edge of the back side of the wafer, improving wafer quality and avoiding the risk of subsequent wafer breakage. Furthermore, this application also provides a wafer with the above advantages.

The present invention provides a mesembryanthemum crystallinum extract production process, and relates to the technical field of biological extraction, and the mesembryanthemum crystallinum extract production process comprises the following steps: S1: raw material selection and pretreatment, S2: extraction: crushed mesembryanthemum crystallinum particles and deionized water are added into an extraction tank according to a mass ratio of 1: 8-1: 12; s3, decolorizing: compounding food-grade activated carbon and diatomite according to a mass ratio of (2: 1)-(3: 1) to serve as a decolorizing agent, and adding a compound decolorizing agent accounting for 3-5% of the mass of the extracting solution into the preliminary extracting solution; s4, deacidification: enabling the decolored extracting solution to pass through an ion exchange column filled with treated resin at the flow speed of 1-1.5 BV / h for deacidification; s5, purification: feeding the deacidified decolored solution into an ultrafiltration system; s6, concentrating and drying: putting the purified liquid into a double-effect external circulation vacuum concentrator; s7, quality inspection; through the steps of decolorization and deacidification, the decolorization effect is more ideal, and the loss of effective components caused by excessive decolorization is avoided; in addition, acidic substances in the mesembryanthemum crystallinum extract can be effectively removed, and the stability and taste of the product are improved.

This invention relates to the field of photovoltaic technology, disclosing a photovoltaic backsheet, its preparation method, and a photovoltaic module. The photovoltaic backsheet sequentially comprises a weather-resistant outer layer, a barrier layer, and a functional inner layer. The functional inner layer includes an acidic substance adsorption and neutralization layer (located between the barrier layer and a humidity buffer layer) and a humidity buffer layer (whose upper surface contacts the lower encapsulation film of the photovoltaic module). The acidic substance adsorption and neutralization layer comprises a matrix (low-acid-value acrylic resin with an acid value ≤ 5 mg KOH / g) and alkaline nanoparticles dispersed in the matrix. The humidity buffer layer comprises a main resin and a controllable moisture-absorbing material dispersed in the main resin. The thickness ratio of the humidity buffer layer to the acidic substance neutralization layer is 1.5-2:1. Through the synergistic effect of each layer, this photovoltaic backsheet, by passively blocking moisture, actively adsorbing and neutralizing corrosion sources, and buffering humidity fluctuations, fundamentally alleviates the power degradation of the photovoltaic module caused by damp heat aging, further extending the service life of the photovoltaic module.

The application discloses a gas-phase crosslinking organic solvent-resistant uniform pore membrane and a preparation method thereof. The preparation method comprises the following steps: placing a block copolymer uniform pore membrane containing a benzene ring in a mixed vapor to perform gas-phase crosslinking, so as to obtain a gas-phase crosslinking organic solvent-resistant uniform pore membrane; the mixed vapor comprises a gaseous methoxy-containing alkane and a gaseous acidic substance; the gaseous acidic substance comprises one or more of an acid in a gaseous state at normal temperature and pressure, a heated acid or a reduced-pressure acid. Through the gas-phase crosslinking technology, the crosslinking of the benzene ring-containing chain segment is completed in an environment without competition between a dissolution process and a crosslinking process, the preparation of the organic solvent-resistant uniform pore membrane is realized, meanwhile, the structure of the uniform pore layer and the support layer of the membrane is ensured not to collapse, and the pure water flux of the prepared gas-phase crosslinking organic solvent-resistant uniform pore membrane is 450 L / (m 2 ·h·bar), and the permeation performance is far superior to that of a liquid-phase crosslinking uniform pore membrane.

The present application provides a kind of vanadium precipitation wastewater acid reduction treatment method, belong to vanadium-containing wastewater and environmental protection technical field, including the following processing steps: S1, the preparation of acid reduction regulator, inorganic adsorbent is placed in oxidizing agent solution and is stirred and dispersed, then the bottom precipitate is ground after precipitation, and the acid reduction regulator is obtained after filtration and washing;S2, the collected vanadium precipitation wastewater is initially filtered, and the waste mother liquor is obtained, the acid reduction regulator is added to waste mother liquor, after mixing evenly, vanadium precipitation wastewater is treated by cooling, and the solid-liquid mixture is obtained by standing, wherein the addition amount of acid reduction regulator in waste mother liquor is 3-10%;S3, the solid-liquid mixture is filtered and separated, and the acid root modified acid reduction regulator and qualified mother liquor are obtained, the vanadium extraction operation is carried out on the qualified mother liquor, and the vanadium extraction efficiency is detected, the acid substance in vanadium precipitation wastewater can be effectively removed, the vanadium ion is effectively retained, and further extraction and recovery are facilitated.