398 results about "Catalytic effect" patented technology

The invention discloses a supported nickel catalyst for preparing 1, 3-propylene glycol through hydrogenation of 3-hydroxypropionaldehyde as well as a preparation method and application of the supported nickel catalyst, and relates to the technical field of catalysts. The modified long-chain multi-carbon inducer is used, and a special long-chain molecular structure and a branched chain group of the inducer can effectively and selectively adsorb and occupy a micropore impregnation site; the preparation method has the beneficial effects that more active component nickel species are obviously promoted to be dispersed in main reaction confinement spaces such as mesopores and macropores and interact with the carrier to form effective active sites, and active component steeping liquor is inhibited from entering micropore channels due to capillary action; the active site failure caused by agglomeration of nickel species in micropores in the subsequent drying and roasting process of the catalyst precursor is avoided, the efficient and directional reaction is ensured, the generation of by-products is greatly reduced, the pressure is relieved for the subsequent product rectification separation, and the final product purity is improved. The catalyst provided by the invention can still keep an excellent catalytic effect when the air speed of a 3-hydroxypropionaldehyde solution is increased to 6.5 h <-1 >.

The invention discloses a method for degrading polystyrene (PS) plastic and upgrading and recycling the PS plastic into benzoic acid based on nano MnO2 photocatalytic ozonation, and belongs to the technical field of solid waste recycling. The method comprises the following steps: firstly, mixing PS plastic fragments with nano MnO2 and an organic solvent, then simultaneously introducing ozone into a reaction system at normal temperature and normal pressure, and irradiating with light. Through synergistic catalysis of light and ozone, molecular chains of the PS plastic can be efficiently and selectively broken and oxidized, and finally the PS plastic is directionally converted into benzoic acid with high additional value. After the reaction is finished, a benzoic acid product can be obtained through simple separation, concentration and purification steps. The method provided by the invention realizes high-valued recycling of the waste PS plastic under mild conditions, solves the problems of high energy consumption, complex products, easy generation of secondary pollution and the like in a traditional treatment method, and has the outstanding advantages of green process, efficient reaction, high product value and the like.

The invention provides a PTFE modified membrane, a modification method thereof, a wastewater treatment system and a wastewater treatment method, the PTFE modified membrane is obtained by adding metal oxide catalyst particles into a PTFE polymer for modification, and the weight of the metal oxide catalyst particles accounts for 5-20% of the weight of the PTFE polymer; the diameter of the metal oxide catalyst particles is 10-100 nm; the pore-forming rate of the PTFE modified membrane is 53-62%, and the pore diameter range is 0.1-1 [mu] m. The metal oxide catalyst particles are added into the PTFE polymer of the hollow fiber membrane for modification to form the PTFE modified membrane, so that the gasification catalytic effect of ozone on the surface of the membrane material of the hollow fiber membrane module is improved, and full contact, mixing and net-effect removal of pollutants and ozone are realized; therefore, the pollutant removal rate and the quality of a product produced by wastewater treatment are improved; the technological process is simple, field application is convenient, and product performance is stable.

The invention relates to the field of distillation equipment, in particular to a novel distillation tower. The technical problems that in a traditional device, contact between a catalyst and a raw material is not sufficient, the catalytic effect is poor, the distillation efficiency is low, it is inconvenient for workers to intermittently add the raw material into a distillation cylinder, and continuous work is not convenient are solved. A novel distillation tower comprises a supporting frame, a distillation cylinder is fixedly connected to the supporting frame, the distillation cylinder is hollow, a liquid outlet valve is fixedly connected to the bottom of the distillation cylinder, and a heating frame is rotatably connected to the lower portion of the inner wall of the distillation cylinder. The contact frame is driven by the motor to rotate, the contact frame extrudes the limiting plate upwards, the through hole in the limiting plate moves upwards to enter the discharging pipe, raw materials can enter the distillation cylinder, the contact frame continues to rotate to be separated from the limiting plate, the limiting plate limits the raw materials again, intermittent discharging into the distillation cylinder can be facilitated, and continuous work is facilitated.

The invention discloses a preparation method of a bifunctional heterojunction catalyst for AEM electrolyzed water. The method comprises the following steps: step 1, mixing multi-walled carbon nanotubes, deionized water, absolute ethyl alcohol and inorganic acid; step 2, putting the mixed solution in the step 1 into an ultrasonic machine to form a porous structure and more active adsorption sites; step 3, carrying out freeze drying treatment on the mixed solution treated in the step 2; step 4, mixing the dried multi-walled carbon nanotubes with acetylacetone salt, and uniformly grinding the mixed powder; and step 5, putting the powder obtained in the step 4 into a tubular furnace, and carrying out heat treatment in the atmosphere of H2 / Ar to obtain the PtFeCoNiMoZr / ZrO heterojunction catalyst. The catalyst has a remarkable catalytic effect on HER and OER reactions, and meanwhile, stable electrolysis which stably runs for 200 hours in an AEM electrolytic cell under the current density of 1200 mA / cm < 2 > is successfully realized.

The invention discloses a preparation method and application of an iron carbide nanoparticle modified carbon-based Fe monatomic catalyst, in the preparation process, Fe < 3 + > is complexed with oxalic acid in advance to realize coordination self-assembly and effectively inhibit hydrolysis of Fe < 3 + >, and glucose is used as a carbon-based carrier precursor and a reducing agent to prepare a carbon-based Fe monatomic catalyst. According to the preparation method, the self-assembled iron species are converted into Fe3C nanoparticles at a high temperature, melamine and cyanuric acid are used as N sources to realize N-doped carbon and anchor part of the iron species to form Fe monatomic atoms, and in addition, oxalic acid, melamine and cyanuric acid are easy to decompose at the high temperature to generate small-molecule gas, so that glucose forms a porous carbon structure during high-temperature carbonization, and the porous carbon structure is formed. Finally, Fe3C and Fe monatomic synergistic coexistence hierarchical porous N-doped composite carbon-based catalyst is achieved, the obtained catalyst can efficiently activate peracetic acid and degrade phenol organic pollutants, and the catalyst is simple in preparation process, good in catalytic effect and high in stability and has wide application potential.

The invention relates to a lignin-derived carbon aerogel loaded metal nano enzyme and a synthesis method and application thereof, the synthesis method comprises the following steps: adding sodium lignin sulfonate, CoCl2. 6H2O and NiCl2. 6H2O into deionized water, and carrying out ultrasonic dispersion to obtain a lignin-metal solution; uniformly mixing and stirring the lignin-metal-PVA composite precursor solution with a polyvinyl alcohol aqueous solution to obtain a lignin-metal-PVA composite precursor solution; carrying out at least three times of freezing-unfreezing circulation treatment on the lignin-metal-PVA composite hydrogel to obtain lignin-metal-PVA composite hydrogel; carrying out freeze drying treatment to remove moisture, so as to obtain a lignin-metal-PVA composite aerogel precursor; and carrying out pyrolysis treatment in a nitrogen environment, and naturally cooling to room temperature. The lignin-derived carbon aerogel loaded Co-Ni bimetallic nano-enzyme prepared by the invention shows excellent catalytic activity, product selectivity and cycle stability in photocatalytic CO2 reduction reaction of high and low concentration CO2 due to bimetallic synergistic catalytic effect, high specific surface area and stable three-dimensional skeleton.

The invention belongs to the technical field of synthesis and antibiosis of nano-enzyme catalysis systems, and discloses an enzyme catalysis system with a function of targeted inhibition of growth of streptococcus mutans as well as preparation and application of the enzyme catalysis system. The enzyme catalysis system with the targeted inhibition function on the growth of the streptococcus mutans is formed by loading AuNPs and PCN-22 (Fe) on a CMD molecular chain through in-situ growth, and the mass ratio of the AuNPs to the PCN-22 (Fe) to the CMD is (0.22%-0.33%) to (12.34%-21.79%) to (77.88%-87.44%). The cascade catalytic effect of the nano-enzyme is adjusted by regulating and controlling the carboxymethyl substitution degree of CMD, so that glucose in a decayed tooth pathological environment is efficiently catalyzed in one step to generate ROS, and damage to probiotics is reduced while the inhibition efficiency of pathogenic bacteria is improved.

The invention belongs to the technical field of enzyme engineering and gene engineering, and particularly relates to a recombinant immobilized enzyme, an expression gene thereof and application of the recombinant immobilized enzyme in production of macrocyclodextrin. According to the preparation method, SpyTag and SpyCatcher peptides are fused to the N end of isoamylase and the N end of 4-alpha-glucanotransferase respectively, the 4-alpha-glucanotransferase modified by the SpyTag and the isoamylase modified by the SpyCatcher are obtained, and after spontaneous isopeptide bonds are formed between the SpyTag and the SpyCatcher, the self-assembled macrocyclodextrin production enzyme cluster is obtained. The obtained macrocyclodextrin production enzyme cluster forms an enzyme aggregate with a three-dimensional structure under the traditional glutaraldehyde-mediated catalytic action, namely the recombinant immobilized enzyme. The recombinant immobilized enzyme disclosed by the invention can be repeatedly utilized, is simple and convenient to operate, is easy to separate a converted product, and can be applied to industrial production of the macrocyclodextrin.

The invention discloses cysteine mediated Hf / Cu bimetal synergistic self-assembled nano-particles as well as a preparation method and application of the cysteine mediated Hf / Cu bimetal synergistic self-assembled nano-particles. According to the method, cysteine is used as a multifunctional ligand, carboxyl and sulfydryl of cysteine are in bridge connection with metal through coordination, ligand chelation and assembly guiding effects are synchronously exerted, bimetallic ions are induced to be cooperatively self-assembled in an alkaline system (pH is 9-10), and metal cysteine self-assembled nanoparticles with uniform structures are formed through in-situ nucleation and multistage aggregation. According to the method, the ligand function and the bimetallic synergistic effect are accurately matched, the synthesis process is mild (room temperature), the operation is simple and convenient, and the product is excellent in dispersity and stability. Meanwhile, a close coordination structure constructed by cysteine provides a key channel for energy / electron transfer from sensitizing metal to Cu under X-ray irradiation, and lays a structural foundation for subsequent catalytic effect enhancement.

The application provides a high-efficiency catalyst for cyclic carbonates, a preparation method and application thereof, and compared with the prior art, the catalyst is prepared from a monoamine-based polyether, a polyamine, a phenolic monomer and formaldehyde, an aminated intermediate is synthesized through a chemical grafting reaction, and then is reacted with an epoxy group quaternary ammonium salt to obtain a supported quaternary ammonium salt catalyst. The catalyst molecular structure comprises a quaternary ammonium salt group, a tertiary amine group, a hydroxyl group and an ether bond structure, can not only play a catalytic effect of the quaternary ammonium salt, but also has a certain complexing effect of oxygen atoms in the tertiary amine group, the hydroxyl group and the ether bond structure, can stabilize the ion pair of the quaternary ammonium salt catalyst, and ensure the catalytic effect of the catalyst. Moreover, the catalyst prepared in the application can be independently used for catalyzing preparation of cyclic carbonates, does not need a cocatalyst, and has high catalytic efficiency and good stability.

The invention discloses a method for preparing rare saponin by utilizing panax japonicus endogenous enzyme, and relates to the technical field of extraction, the panax japonicus plant material or crude extract thereof is directly taken as a starting point, the enzyme system is simple and convenient to obtain (fresh medicinal material low-temperature homogenate extraction or direct use of freeze-dried powder), the reaction system is simple, and the operation is easy. According to the preparation process provided by the invention, the catalytic action of endogenous enzyme is fully utilized, so that the introduction of exogenous substances (acid-base, protein and the like) in the extract is completely avoided; the method disclosed by the invention is high in catalytic efficiency, can quickly realize complete conversion of saponin (within 10min) under specific conditions, and has extremely high industrial application.

The application discloses a high-efficiency degradation of dyes and antibiotics high-entropy spinel ferrite catalyst and a preparation method and application thereof. 1 / 2 Zn 1 / 2 Fe 2 / 3Co 2 / 3 Ni 2 / 3 O4(HEO-FNCCZ) high-entropy spinel ferrite catalyst, the photocatalytic degradation performance of common dyes and antibiotics is evaluated by using simulated visible light photocatalysis, and the reaction mechanism of the photocatalytic degradation of methylene blue with the best effect is studied. The catalytic effect of the spinel ferrite is utilized to effectively promote the photocatalytic reaction, so that the environment-friendly pollutant degradation is realized. The method has the characteristics of simple production process, no introduction of various organic toxic and harmful substances, non-toxic and harmless in use, catalyst recovery efficiency more than 95%, and no secondary pollution. The preparation method only involves processes such as dissolving, calcining and crushing, and is extremely suitable for industrialized batch production.

The application discloses a preparation method of a mesoporous silicon-based composite material with phosphotungstic acid and titanium oxide simultaneously supported, and belongs to the technical field of catalytic material preparation. The method aims to solve the problems of easy aggregation of active components, easy damage of channel order and complex preparation process in the prior art. The method is characterized by the following steps: through a one-step hydrothermal synthesis strategy, a triblock copolymer is used as a structure directing agent, an alcohol solution of a titanium source precursor, a silicon source precursor and a Keggin type phosphotungstic acid is simultaneously added in an acid system, and then the mesoporous silicon-based composite material is prepared through hydrothermal crystallization, washing, drying and calcination. The method is simple in process and controllable in operation, and the obtained material has the following advantages: two-dimensional hexagonal ordered mesoporous structure, large specific surface area, high dispersion of titanium and phosphotungstic acid, intact Keggin structure, good double-acid-site synergistic catalytic effect, and suitability for acid catalytic reactions, especially in the field of biomass conversion.

The application provides a construction method of a photoelectrochemical enzyme sensor based on signal polarity flip, and steps are as follows: step 1, preparation of BiOBr nanosheet; step 2, preparation of CuMOF nanosheet; step 3, preparation of BiOBr / CuMOF nanocomposite; and step 4, construction of a signal flip type photoelectrochemical sensor. The prepared BiOBr / CuMOF is used as a working electrode to create a sensitive photoelectrochemical sensing platform. The polarity of a photoelectric current signal is flipped by using a target, and the detection system plays a role in eliminating background signals and enhancing anti-interference capability. When the target ALP exists, ascorbic acid-2-phosphate magnesium (AAP) in the solution is decomposed under the catalysis of ALP to generate ascorbic acid, and the Bi 3+ -O bond in BiOBr is broken to generate an oxygen vacancy, so that the photoelectric current signal is flipped, the relationship between the photoelectric current response value and the ALP concentration is established, and the purpose of rapid, sensitive and selective detection of the ALP content in human serum is achieved.

The application discloses a triphenylmethane polyether dye and a preparation method thereof, and the preparation method comprises the following steps: (1) adding an organic catalyst and an oxidant into a triphenylmethane polyether dye leucoaqueous solution in the interval of 40-60 DEG C, adding an acid-binding agent to maintain a proper pH, and completing oxidation; the organic catalyst is a ferrocene-rotene iron compound; (2) adjusting the pH with an acid-binding agent aqueous solution, removing the organic catalyst by hot filtration, removing water through vacuum distillation of the filtrate, and performing pressure filtration to obtain the triphenylmethane polyether dye. The improved rotene iron catalyst is used in the application, the catalytic effect is obviously improved, the reaction temperature and activation energy are reduced, the defects of excessive hydrogen peroxide oxidation are overcome, and the obtained product meets the EN71-3 standard.

The present application relates to furan preparation technical field, specifically to a kind of furfural decarbonylation catalyst, preparation method and utilize the catalyst preparation furan process.The catalyst includes carrier and active component supported on it, with the mass of the carrier, Pt 0.2%‑0.6%, Co 4%‑8%, Al2O3 74%‑85%, ZrO2 11%‑16%, CeO2 4%‑13%.The present application adopts structural aid ZrO2 and CeO2 to modify Al2O3 carrier, obtains acid moderate composite oxide carrier, can avoid the influence of furfural polymerization and the activity and stability of catalyst;Using Co as auxiliary active component, under the premise of reducing the dosage of main active component Pt, ensure catalytic effect, not only reduce the cost of catalyst, more importantly, it can improve the conversion rate of furfural and furan selectivity in furfural decarbonylation reaction, ensure high furan yield.

The invention discloses a chiral 1, 4-diazabicyclo [3.1. 1] heptane derivative as well as a synthesis method and application of the chiral 1, 4-diazabicyclo [3.1. 1] heptane derivative. According to the invention, a 1-azabicyclo [1.1. 0] butane derivative is taken as a raw material, under the catalytic action of a chiral iridium complex, the 1-azabicyclo [1.1. 1] butane derivative and an N-allyl carbonate derivative are subjected to [3 + 2] cycloaddition reaction, a series of chiral 1, 4-diazabicyclo [3.1. 1] heptane skeletons with diversified structures are constructed with high stereoselectivity, and the obtained product has the potential of further derivatization. The method has the advantages of easily available raw materials, mild reaction conditions, simplicity and convenience in operation, good functional group compatibility and the like.

A green synthesis method of nitrobenzene compounds, in an organic solvent, using aromatic amine as raw material, using an oxidant and a catalyst to form a reaction system, selectively oxidizing aromatic amine into corresponding nitrobenzene compounds, the method selects an oxidant which is green, pollution-free, the catalyst is common, easy to obtain, low in price, and has significant catalytic effect, and the reaction conditions are mild, simple in operation, low in cost, fast in speed, high in selectivity and high in product yield, which is a novel, good scientific research value and industrialization potential synthesis method of nitrobenzene compounds.

The invention discloses an Ag monatomic catalyst, a preparation method thereof and application of the Ag monatomic catalyst in preparation of amino acid, and belongs to the technical field of amino acid preparation. The Ag monatomic catalyst comprises a carrier and an active component, wherein the active component is dispersed on the surface of the carrier in a monatomic form; the carrier is a metal oxide, and the metal oxide comprises one of CeO2, Fe2O3, TiO2, ZnO, Nb2O5 and ZrO2; the active component is Ag, and the loading capacity of the active component is 0.05-0.5 wt%; the Ag monatomic catalyst is used for preparing amino acid, and amino alcohol and O2 are subjected to oxidation reaction under the catalytic action of the Ag monatomic catalyst to obtain the amino acid. The catalyst provided by the invention has a high catalytic effect on amino acid preparation by oxidation of amino alcohol, and is mild in reaction condition and high in amino acid selectivity; meanwhile, the catalyst has high stability in the amino acid preparation process, and the catalytic activity can be kept in the long-time production process.

A ZIF-derived zinc-cadmium sulfide photocatalyst, its preparation method, and its application are disclosed. The catalyst, by molar fraction, comprises: 35-50% 2-methylimidazole; 0-7.7% divalent cadmium ion compound; 0-7.7% divalent zinc ion compound; 7-10% thioacetamide; and 35-50% amines. The preparation method involves: preparing a 2-methylimidazole solution and a cadmium-zinc mixed solution separately; then preparing a ZIF precursor solution with cadmium and zinc as the central metals; adding thioacetamide to the precursor solution; transferring the solution to a polytetrafluoroethylene liner and hydrothermally treating it; finally collecting the hydrothermally treated solution, centrifuging, washing, drying, and grinding to obtain the ZIF-derived zinc-cadmium sulfide photocatalyst. The catalyst prepared by this invention has a large specific surface area and exhibits significant catalytic effects in photocatalytic water splitting for hydrogen production. Furthermore, the catalyst has a stable structure and can be recycled for a long period without a significant decrease in the hydrogen production rate.

The utility model relates to the technical field of dehydrogenation reaction, in particular to an ultrasonic vibration assisted dehydrogenation reactor which can enhance the catalytic effect and improve the reaction efficiency. Comprising an outer cylinder with a cavity inside; the inner cylinder is arranged in the outer cylinder, and a reaction cavity is formed in the inner cylinder; the ultrasonic vibration motor is arranged at the bottom of the inner barrel, and the ultrasonic vibration motor is arranged in an interlayer of the outer barrel and the inner barrel; the catalyst storage cylinder is arranged outside the outer cylinder, fixedly connected with the outer cylinder and used for conveying a catalyst into the inner cylinder; the catalyst storage cylinder comprises a storage cylinder body which is fixedly connected with the outer end face of the outer cylinder, a cavity is formed in the storage cylinder body, and a filling port is formed in the top of the storage cylinder body; the preheating coil pipe is coiled in the storage barrel, and an input port and an output port are formed in the preheating coil pipe; the liquid outlet connector is arranged at the bottom of the storage barrel in a communicating mode and communicates with an output port of the preheating coil pipe; and the liquid inlet joint is communicated with the bottom end of the storage barrel.

The invention relates to an oil-containing sludge biochar catalyst, a preparation method thereof and a method for removing organic pollutants in sewage, the method comprises the following steps: S1, heating a mixture containing saccharides, amino compound raw materials, inorganic alkali and oil-containing sludge for Maillard reaction to obtain a precursor containing a nitrogen-containing heterocyclic compound; wherein the amino compound raw material contains amino acid and / or protein; and S2, in an inert atmosphere, carrying out pyrolysis on the precursor containing the nitrogen heterocyclic compound. The oily sludge biochar catalyst prepared by the method disclosed by the invention has a better catalytic effect on activating persulfate to degrade organic pollutants in a water body.

The invention relates to the field of catalysts, in particular to a multi-scale microporous catalyst and a preparation method thereof.Firstly, diffusion and mass transfer of reactants and products are greatly accelerated through a through multi-stage pore network of the catalyst, the exposure degree of active sites is remarkably increased, and therefore the catalytic efficiency is improved; secondly, according to the system, the pore structure and the material composition can be optimized and combined according to the characteristics of different catalytic reactions, such as reactant sizes, reaction media and conditions, so that the system can be widely adapted to various reaction types such as a gas state and a liquid state, and covers most of catalytic scenes; furthermore, various preparation methods can be flexibly combined, especially the 3D printing technology is applied, so that design customization of multi-scale pores and the appearance of the catalyst is realized, and the preparation difficulty of a complex structure is greatly reduced; and finally, reasonable framework material selection and multistage pore design synergistically enhance the catalytic effect and inactivation resistance of the catalyst, so that the service life of the catalyst is prolonged compared with that of a traditional catalyst.

The invention discloses a preparation method of an optically pure mepivacaine hydrochloride intermediate. According to the method, N-(2, 6-dimethylphenyl) pyridine carboxamide is used as a starting material, hydrogenation reduction is carried out in the presence of a ligand and a catalyst to obtain the mepivacaine hydrochloride intermediate ((S)-N-(2, 6-dimethylphenyl) piperidine-2-carboxamide), the ee value of the obtained mepivacaine hydrochloride intermediate can reach 93%, the yield can reach 95%, post-treatment is simple, and the method is suitable for industrial production. The method is very suitable for large-scale workshop production. The ligand used in the invention is cheap and easily available, and can be refined and recovered through column chromatography, and the catalytic effect of the recovered ligand is consistent with that of a newly purchased ligand.

The application provides a continuous palladium-carbon hydrogenation reaction method, which is carried out according to the following steps: step one, mixing carbon catalyst with a solvent, and then injecting into the inside of a reactor; step two, connecting and starting a circulating pump to make the inside catalyst partially flow in a circulating mode; step three, injecting p-nitrotoluene and hydrogen, and carrying out heat exchange treatment on the whole reactor through a heat exchanger to keep the temperature stable during the reaction; and step four, discharging the reaction liquid and carrying out filtration treatment. The continuous palladium-carbon hydrogenation reaction method and equipment optimize the catalytic effect of the catalyst, improve the filtration efficiency, ensure that the raw material liquid and hydrogen enter the reactor, make the catalyst freely flow in the whole reaction area without being discharged from the reactor, continuously remove the product from the reactor, keep the temperature stable during the whole reaction process through the heat exchanger, and automatically stir the inside through the hydrogen injection.

The present application belongs to the technical field of lignite treatment, and particularly relates to a method for improving lignite thermal conversion to produce high-value chemicals. In the present application, in the process of gasification, the catalytic active components in the carbide slag can have synergistic and catalytic effects with the minerals in the lignite. The treatment method provided by the present application can overcome the problems of low energy density, poor gasification efficiency, high tar yield and the like existing in the lignite gasification alone, effectively improves the carbon conversion rate per unit of coal, and greatly advances the reaction temperature zone. In the aspect of coal pyrolysis, the carbide slag can intervene in the pyrolysis reaction path, promote the cracking and conversion of macromolecular organic matter, and be helpful to the production of high-quality tar. The present application fully utilizes the catalysis of the carbide slag on the lignite for gasification or pyrolysis, effectively improves the carbon conversion rate per unit of coal, greatly advances the reaction temperature zone, and simultaneously can directionally regulate and control the production of high-value chemicals in the pyrolysis process, and produce high-quality tar.

This invention discloses a paint remover for steel-aluminum composite materials, belonging to the field of metal material surface treatment technology. It comprises the following components in weight percentages: 5%-8% alkaline substance; 5%-10% lipase component; 10%-16% solvent; 5%-10% surfactant; 6%-13% co-solvent; 5%-8% corrosion inhibitor; and water as the balance. The paint remover is prepared from alkaline substance, lipase component, solvent, surfactant, co-solvent, corrosion inhibitor, and water. It is used for removing paint from steel-aluminum composite materials. On one hand, the alkaline substance saponifies some groups in the paint, dissolving them in the solvent and water. On the other hand, heating and steaming the paint film reduces its strength and adhesion to the metal. Then, utilizing the wetting, penetration, and affinity effects of the surfactant, the catalytic effect of the lipase component, and the protective effect of the corrosion inhibitor on the steel-aluminum substrate, the goal of removing paint quickly without corroding the substrate is achieved.

The application provides a novel ozone catalytic oxidation tower for wastewater treatment, and relates to the technical field of wastewater treatment, and comprises an outer shell, a liquid adding pipe fixedly connected to one side of the outer surface of the outer shell, an air adding pipe fixedly connected to one side of the outer surface of the outer shell, air adding equipment fixedly connected to one end of the outer surface of the air adding pipe, a first motor fixedly installed at the top of the outer surface of the outer shell, a second motor fixedly installed at the top of the outer surface of the outer shell, and a storage bin fixedly installed in the inner part of the outer shell. The cooperation of the storage bin, the rotating shaft, the connecting cylinder, the rotating stirring device and the intermittent feeding plate realizes stirring before catalyst addition and periodic addition. The cooperation of the heating multilayer pipe and the storage bin avoids catalyst dampening, and the already dampened catalyst can be heated to remove dampness, recover the decomposition function, avoid catalyst caking, and ensure the catalytic effect of the catalyst.

The utility model discloses organic waste gas catalytic combustion equipment with a good purification effect, and relates to the technical field of waste gas treatment equipment. The filter box is provided with an air inlet end and an air outlet end, the air outlet end of the filter box is communicated with a reaction tank, the top of the reaction tank is communicated with a first end of a first pipeline, a second end of the first pipeline is communicated with a change-over valve and a circulating box, and the inside of the circulating box is divided into a first chamber and a second chamber through a partition plate; the first chamber and the second chamber are respectively communicated with the change-over valve through a first bent pipe and a second bent pipe, the bottom of the first chamber is communicated with a third exhaust pipe, the bottom of the second chamber is communicated with a second exhaust pipe and a sucking pump, an air inlet of the sucking pump is communicated with the third exhaust pipe, and an exhaust port of the sucking pump is communicated with the reaction tank through a second pipeline. According to the utility model, through the arrangement of the sucking pump and the circulating box, gas in the first chamber can be conveyed into the reaction tank again for reaction, so that the reaction times and the catalytic effect on waste gas are improved.