152 results about "Catalytic method" patented technology

The invention discloses a catalyst for preparing trichlorosilane and a catalytic preparation method of trichlorosilane. The catalyst is prepared from the following components in percentage by mass: weighed copper nitrate, zinc nitrate, aluminum nitrate, lanthanum nitrate and the balance of a carrier, the preparation method comprises the following specific steps: S1, filling a catalyst; S2, purifying raw material gas; S3, reacting; and S4, separating and purifying a product, namely discharging a reacted gas product from an outlet of a reactor, and condensing through a condenser. In the prepared catalyst, the activity and selectivity of the catalyst are remarkably improved through the synergistic effect of the copper-zinc-aluminum composite oxide and the rare earth element lanthanum, the electronic structure and the surface acid-base property of the catalyst can be adjusted through doping of lanthanum, the reaction of silicon powder and hydrogen chloride is promoted, meanwhile, side reactions are inhibited, and the service life of the catalyst is prolonged. And the yield of trichlorosilane is improved.

The invention discloses a catalytic method for converting alpha-olefin in an alkane-olefin mixture into internal olefin and application, raw materials and a solid acid catalyst are carried out in a fixed bed or a reaction kettle, the reaction temperature is 50-150 DEG C, the reaction pressure is 15-400 psi, and the reaction environment is an inert gas atmosphere; when the reaction is carried out on the fixed bed, the mass space velocity of the solid acid catalyst is 1h <-1 >-20h <-1 >; when the reaction is carried out in the reaction kettle, the conversion frequency of the raw materials is 5000 mol substrate mol acid site density <-1 > h <-1 > to 50000 mol substrate mol acid site density <-1 > h <-1 >; wherein the raw material is an alkane-alkene mixture; the solid acid catalyst comprises an active component and a carrier, wherein the carrier contains at least one inorganic oxide; the active component has a structure as shown in a formula (1) and / or a formula (2), in the formula (1) and the formula (2), R is alkyl or phenyl, and n is greater than or equal to 1. According to the catalysis method provided by the invention, the conversion rate of alpha-olefin can be increased, and the proportion of skeleton isomerization products and oligomers in internal olefin products can be reduced.

The invention belongs to the technical field of catalytic methods and catalysts, and particularly relates to a method for preparing a polysubstituted allene carboxylic acid methyl ester compound based on CO2 and photocatalysis, which is based on a photocatalytic reaction system, takes CO2 as a carboxyl source, and is prepared through a 1, 3-enyne 1, 3-polysubstituted allene carboxylic acid methyl ester compound under the mild conditions of no photocatalyst and metal, so that the polysubstituted allene carboxylic acid methyl ester compound is obtained. According to the present invention, the efficient synthesis of the polysubstituted allene carboxylic acid derivative is achieved through the 1, 4-alkane carboxylation reaction, the method has advantages of good yield, wide substrate universality, suitableness for the reaction of a variety of functional groups, non-toxicity of the used reagent, and wide application prospect.

The present invention belongs to the technical field of single-walled carbon nanotube preparation, and particularly relates to a device for preparing single-walled carbon nanotubes by a floating catalyst method, comprising: a reaction mechanism including a reaction furnace tube and a first heating mechanism for heating the reaction furnace tube; a first raw material conveying mechanism including a sublimation tank for storing a catalyst and a second heating mechanism for heating the sublimation tank, the sublimation tank being communicated with the reaction furnace tube through a first conveying path, wherein the catalyst in the sublimation tank is sublimated and forms a gas state by heating the sublimation tank through the second heating mechanism; a second raw material conveying mechanism including an injection pump for storing a liquid carbon source and a gas cylinder for storing a gas, the injection pump and the gas cylinder being communicated with the reaction furnace tube through a second conveying path; and a collection mechanism including a collection assembly communicated with the reaction furnace tube. The device of the present invention can improve the yield of single-walled carbon nanotubes and the stability of the preparation process.

This invention discloses a solution-based synergistic catalytic method for preparing post-functionalized polyolefins, belonging to the field of polymer material modification technology. The method includes the following preparation steps: adding polyolefin, graft monomer, and catalyst to an organic solvent, stirring until homogeneous, and heating to react, thereby obtaining the post-functionalized polyolefin; wherein the catalyst is a combination of a first catalyst and a second catalyst; and the first catalyst is selected from tert-butyl nitrite, and the second catalyst is selected from N-hydroxysuccinimide and / or N-hydroxyphthalimide. This invention utilizes a synergistic catalytic system composed of tert-butyl nitrite and N-hydroxysuccinimide and / or N-hydroxyphthalimide to activate the C-H bonds of polyolefins in an organic solvent via a free radical mechanism, thereby grafting polar functionalized graft monomers onto the main chain of various polyolefins.

The utility model discloses an ammonia-ammonium chloride catalysis system for decarburization of steel slag solid waste and flue gas, and belongs to the technical field of ferrous metallurgy. The ammonia-ammonium chloride catalysis system for steel slag solid waste and flue gas decarburization comprises a steel slag dissolving tank, an ammonia gas condensation cooler and a decarburization tower which are sequentially connected, the top of the decarburization tower is sequentially connected with an ammonia recovery system, an impurity filtering system and a calcium carbonate extraction system, and the bottom of the decarburization tower is connected with the calcium carbonate extraction system. The calcium carbonate extraction system is connected with the steel slag dissolving tank, and the steel slag dissolving tank is communicated with the ammonia recovery system. According to the technical scheme, the purpose of carbon capture and high-added-value resource reutilization of the steel slag are achieved.

The application discloses a kind of ruthenium grafting manganese aluminum hydrotalcite and catalytic method for C02 hydrogenation preparation formic acid, belong to catalyst technical field, in the application, under the optimized reaction condition, with methanol:water mixture as solvent (5:1), total pressure is 60bar, 60 DEG C, reaction 24 hours, with temperature controller to be heated to the temperature required for reactor.When the temperature inside the reactor reaches the specified temperature, start stirring at a fixed stirring speed (200-800 revolutions / min), after the required reaction time, stop stirring and heating, and allow the reactor to cool to room temperature. The hydrogenation products were analyzed by high performance liquid chromatography, the conversion number (TON) of formic acid reached more than 8000; RuMnAl-LDH was prepared by coprecipitation method, and RuMnAl hydrotalcite catalyst was obtained by heating and activation in a muffle furnace. The preparation process is simple, and the raw materials are easy to obtain. The RuMnAl-LDH catalyst prepared by the application has good catalytic activity and stability in the catalytic hydrogenation of formic acid to formic acid reaction, and has wide application prospect.

The application belongs to the field of catalytic synthesis of fine chemical products, and particularly relates to an ionic compound and a method for catalytically synthesizing cyclic carbonate. The application provides an ionic compound, which comprises an anion as shown in formula (I) or formula (II); wherein X is selected from O, S and Se, and the value of L is 0 or 1; the anion in the ionic compound has suitable nucleophilicity and leaving property, can be combined with other active positive ions or metal ions to form a catalytic system with good solubility, and is particularly suitable for being used in a cycloaddition reaction involving carbon dioxide. Meanwhile, the application further provides a catalytic method for synthesizing cyclic carbonate, which uses a catalytic system containing the ionic compound, so that cyclic carbonate can be synthesized in a solvent-free, low-halogen or halogen-free, low-catalyst-amount and mild reaction condition mode with high efficiency, high conversion rate and high chemical selectivity.

The application relates to a method for efficient utilization of solid waste, in particular to a catalytic method for polyolefin waste. The application provides a preparation method of a catalyst for catalyzing polyolefin waste, which comprises the following steps: 1) mixing an acid molecular sieve and an active metal precursor, and roasting to obtain a catalyst precursor; and 2) reducing the catalyst precursor by a reducing agent to obtain the catalyst. In the application, the acid molecular sieve is used as a carrier, solid ion exchange is carried out through high-temperature roasting, the active metal component is solidified in the molecular sieve channel structure, the reduced catalyst has rich acid sites, defect sites and high-dispersed active metals, and in combination with the shape selection and confinement of the molecular sieve structure, efficient conversion of the polyolefin waste into naphtha can be realized.

Production of HFO-1132 and, in particular, HFO-1132E, may be produced from 1,1,2-trichloro-1,2,2-trifluoroethane (CFC-113) or CTFE. The present disclosure provides a non-catalytic method for producing trans-1,2-difluoroethylene (HFO-1132(E)), comprising: providing a reactant composition comprising cis-1,2-difluoroethylene (HFO-1132(Z)); and isomerizing the HFO-1132(Z) in an electric heater reactor or a tubular reactor at a temperature of from about 350°C to about 600°C to produce a product composition comprising HFO-1132(E).

This invention provides a 7β-HSDH enzyme mutant, its encoding gene, and its applications. Through artificial mutation screening, 7α-HSDH and 7β-HSDH enzyme mutants with specific amino acid sequences were identified, resulting in improved enzyme activity and catalytic efficiency compared to wild-type 7α-HSDH and wild-type 7β-HSDH. This invention also provides a method for preparing ursodeoxycholic acid using the aforementioned 7α-HSDH and 7β-HSDH enzyme mutants, specifically using NADP... + A one-pot catalytic method for the conversion of chenodeoxycholic acid to ursodeoxycholic acid using NADPH-dependent 7α-HSDH enzyme mutants and NADPH-dependent 7β-HSDH enzyme mutants is employed. This method is simple, yields high product conversion, and can also achieve the conversion of the coenzyme NADP. + / NADPH's self-circulating regeneration eliminates the need for auxiliary enzymes and raw materials used in coenzyme regeneration, greatly reducing production costs and environmental pressure, and possessing enormous potential for industrial applications.

The invention relates to the technical field of sewage treatment, and particularly discloses a sewage treatment system based on an electro-catalysis method, which is used for solving the problem of poor cleaning effect in the prior art. Comprising a sewage treatment box, a plurality of supporting legs are arranged at the lower end of the sewage treatment box, a sewage inlet pipe used for feeding sewage is arranged on the sewage treatment box, an electrolysis module used for electrolyzing the sewage is arranged in the sewage treatment box, and the sewage can be purified through the electrolysis module; the drainage end of the circulating pump is communicated with the sewage treatment tank, the water inlet end of the circulating pump is communicated with the other end of the sewage treatment tank through a circulating pipeline, and a buffer outer tank is arranged at the water outlet of the sewage treatment tank. According to the present invention, the design is performed according to the existing needs, the circulation structure can be constructed in the sewage treatment tank, the sewage electrolysis is matched, the floating impurities in the sewage are removed through filtration, the influence of the liquid level is avoided, and the sewage purification effect is ensured.

The invention provides a photo-catalytic treatment reactor and a photo-catalytic method for photosensitive dry film developing waste liquid, the reactor comprises: an outer cylinder, an inner cylinder is arranged in the outer cylinder, the outer cylinder and the inner cylinder form an interlayer for storing waste liquid, the outer cylinder is a closed structure, and a liquid inlet pipeline is arranged on the outer cylinder; the inner cylinder is used for introducing the waste liquid in the interlayer in batches, a photocatalyst is arranged on the inner wall of the inner cylinder, an opening and closing door is mounted on the upper end face of the inner cylinder, and a liquid outlet pipeline is arranged on the lower end face of the inner cylinder, penetrates through the lower end face of the outer cylinder downwards and extends out of the outer cylinder; the opening and closing door is rotationally connected with the inner barrel and connected with a driving part on the inner wall of the outer barrel, and when the opening and closing door is closed, the inner barrel can be closed; a stirring part and a light source are arranged on the rotating shaft, the rotating shaft is connected with the output end of the power part, and the rotating shaft downwards penetrates through the upper end face of the outer cylinder from the outside of the outer cylinder and extends into the inner cylinder. The photocatalytic reaction efficiency is improved.

The invention relates to the technical field of flow batteries, and particularly discloses a catalytic system and a catalytic method of a flow battery. The catalytic system comprises an electric pile unit used for realizing conversion between electric energy and chemical energy; the electrolyte storage unit is used for storing electrolyte and comprises a positive electrode electrolyte storage unit and a negative electrode electrolyte storage unit, and functional particles are arranged in the positive electrode electrolyte storage unit and / or the negative electrode electrolyte storage unit; the ultrasonic unit is used for promoting the functional particles to be in contact with the positive electrode electrolyte and / or the negative electrode electrolyte for electrification to generate an electrostatic field; and the circulating unit is used for realizing circulation of the electrolyte between the electrolyte storage unit and the electric pile unit. According to the flow battery catalytic system, the electron transfer process can be optimized, and the problems of slow reaction kinetics and noble metal dependence of the flow battery are solved.

The invention relates to a catalytic method for increasing the content of synthesis gas in biomass carbon dioxide gasification products. The method comprises the following steps: independently dissolving transition metal salt, alkali metal salt or alkaline earth metal salt in water, or jointly dissolving the transition metal salt and at least one of the alkali metal salt or the alkaline earth metal salt in water to form a metal salt solution; biomass powder is added into the metal salt solution for first stirring, a mixed solution obtained after first stirring is subjected to first dipping, first standing and first drying, and a metal-doped autocatalytic biomass raw material is obtained; aluminum oxide powder is added into the metal salt solution for second stirring, the mixed solution subjected to second stirring is subjected to second dipping, second standing, second drying and roasting, and the metal-loaded aluminum oxide catalyst is obtained; and by taking carbon dioxide as a gasifying agent, enabling the autocatalytic biomass raw material and the metal-loaded aluminum oxide catalyst to exist at the same time under the condition of 700-1000 DEG C, and carrying out gasification reaction to obtain a product of which the integral number of synthetic gas is greater than 85%.

The present invention provides a catalyst comprising an iron species, manganese or an oxide thereof, cobalt or an oxide thereof, an alkali metal, and optionally at least one selected from the group consisting of zinc and copper, a process for preparing the catalyst, and a process for hydrogenating carbon dioxide and / or carbon monoxide to produce hydrocarbons using the catalyst.

This invention relates to the field of CO2 catalytic hydrogenation to methanol technology, specifically to a two-step catalytic method for methanol production using non-equilibrium plasma synergy. Conventional non-equilibrium plasma catalytic hydrogenation to methanol methods suffer from low CO2 conversion and methanol space-time yield, rarely reaching 80%. To address these issues, this invention provides a two-step catalytic method for methanol production using non-equilibrium plasma synergy. By employing stepwise reactions, optimizing catalyst composition, and refining the catalyst loading sequence in a dielectric barrier discharge catalytic reactor, this method significantly improves CO2 conversion and methanol selectivity in the non-equilibrium plasma synergistic two-step catalytic methanol production reaction, achieving remarkable technical benefits.

The present application relates to a kind of synthetic hydroxytyrosol multi-enzyme catalytic method.The synthetic hydroxytyrosol multi-enzyme catalytic method described in the present application includes first module reaction, second module reaction, third module reaction in turn;The first module reaction is that glycerol is synthesized pyruvic acid by catalysis, wherein the concentration of the glycerol is 1-5mM;The second module reaction is that pyruvic acid is condensed with catechol and ammonium chloride to be L-levodopa by catalysis;Wherein, the concentration of the catechol is 1-5mM, and the concentration of the catechol is greater than the concentration of the glycerol in the first module reaction;The third module reaction is that L-levodopa is synthesized hydroxytyrosol by catalysis.The synthetic hydroxytyrosol multi-enzyme catalytic method described in the present application, reaction 4 hours hydroxytyrosol molar conversion rate can reach 71.5%, compared with one-pot method has obvious advantage, in the same reaction time molar conversion rate is compared with one-pot method and increased nearly 6 times.

The application discloses a catalytic flue gas treatment device and a yellow phosphorus tail gas purification system, and aims to solve the technical problem of reducing the hidden danger of oxygen supplement to the flue gas to be treated during the operation of the catalytic flue gas treatment device. The device comprises a reaction system, a regeneration liquid circulation system and a flue gas conveying system, and further comprises an oxygen supplement system. The oxygen supplement system comprises a second air blower, an airflow adjusting device and an oxygen supplement gas distribution pipe network. The second air blower and the airflow adjusting device are connected with each reactor through the oxygen supplement gas distribution pipe network, so that the airflow generated by the second air blower is adjusted in flow by the airflow adjusting device, and then forms the oxygen supplement gas and enters the flue gas to be treated in the corresponding reactor. The oxygen concentration in the oxygen supplement gas is greater than that in the flue gas to be treated before the mixed oxygen supplement gas. The safety hidden danger possibly caused by the external mixing of the oxygen supplement in the reactor is avoided.

The application relates to an array type magnetic driving continuous flow system and a catalytic method. The array type magnetic driving continuous flow system comprises at least one reactor unit, and the reactor unit comprises: an upper cover plate and a lower cover plate which are oppositely arranged; a reactor main channel which is arranged between the upper cover plate and the lower cover plate; a solid particle fixing cavity which is arranged in the reactor main channel; magnetic nano particles which are arranged in the solid particle fixing cavity; and a magnetic driving array which comprises at least one group of regularly arranged permanent magnets, the group of permanent magnets are respectively fixed on the upper cover plate and / or the lower cover plate, and can generate a magnetic field which acts on the magnetic nano particles, so that the magnetic nano particles are reversibly fixed in the solid particle fixing cavity. The application effectively solves the problems of the magnetic catalyst in the continuous flow system, such as fixing, mass transfer, flux and recovery, and provides a continuous flow catalytic solution which is efficient, flexible and easy to enlarge.

The present invention relates to systems and methods for catalytic removal of oxidized contaminants (for example, nitrite, chromate, chlorate, trichloroethene, CFC-11, 4-nonylphenol, RDX, and perfluorooctanoate) from water and wastewater. In some aspects, the catalytic method of removing oxidized contaminants comprises using precious metal nanoparticles as catalysts to reduce the oxidized contaminants.

The invention belongs to the technical field of catalysts and catalysis methods, and particularly relates to a biomass-derived curvature carbon nanotube anchoring atom dispersion metal catalyst and a preparation method and application thereof. Furthermore, the invention also discloses a method for catalytic oxidation of sulfur-containing volatile organic pollutants by ozone. The preparation method of the catalyst comprises the following steps: mixing a biomass raw material and a metal salt, carrying out pre-pyrolysis at 450-600 DEG C in a nitrogen atmosphere, then heating to 700-900 DEG C, annealing, and carrying out post-treatment to prepare the biomass-derived curvature carbon nanotube anchoring atom dispersion metal catalyst, the mass percentage of the metal salt in the biomass raw material is 0.8-3.0 wt.%; metal in the metal salt is transition metal; the catalyst comprises a carbon nano tube and metal loaded on the tube wall of the carbon nano tube; and the average diameter of the carbon nanotubes is 8-50 nm. The catalyst provided by the invention has excellent catalytic activity, and shows excellent removal efficiency and stability on S-VOCs.

The application discloses an interactive catalytic method and platform based on molecular simulation and artificial intelligence, and realizes intelligent design of a catalyst through data classification, condition optimization, structure modeling and mechanism analysis. After being standardized, the catalytic data uploaded by a user is divided into two categories: data set A is used for recommending optimal reaction conditions by a multi-objective optimization algorithm; and the catalyst structure of data set B is optimized by quantum chemistry software to construct a three-dimensional model, and multiple intermediate, transition state structures and geometric / electronic descriptors are optimized. Through feature screening and dimension reduction technology, a double-model collaborative prediction system of model E and model F is constructed, and finally, model F is used to drive a molecular generation algorithm to screen high-performance catalysts. The application can realize flexible adaptation to specific application scenarios, meet the urgent needs of the industry for efficient and accurate catalyst performance prediction and intelligent design, and effectively help the industry to reduce costs and increase efficiency, and accelerate the catalyst research and development process.

The invention belongs to the technical field of biology, and particularly relates to a method for producing xylitol by catalyzing hemicellulose hydrolysate through a biological enzyme, which comprises two stages: in the first stage, adding hemicellulose hydrolysate, xylose reductase, arabinose dehydrogenase and glucose dehydrogenase to form a fermentation system, adjusting the pH value of the system to 8.0-9.5, and fermenting, adding L-arabinose until no L-arabinose residue exists in the fermentation liquid to obtain a fermentation reaction liquid I; in the second stage, the pH value of the fermentation reaction liquid I is adjusted to 6.5-7.5, fermentation continues to be conducted, and a fermented product containing xylitol is obtained. According to the method for preparing the xylitol through the biological enzyme catalysis method, cheap hemicellulose hydrolysate can be directly adopted as a raw material, and high-purity xylose does not need to be used as the raw material; the xylose reductase, the arabinose dehydrogenase and the glucose dehydrogenase used in the method are wide in gene source, the three-enzyme one-pot catalytic process is simple and efficient, the conversion rate of xylose and the yield of xylitol both can exceed 99%, the content of impurity arabitol in the product is low, other impurity saccharic acid is easy to separate, and the method is suitable for industrial production. The problems of complex process, high separation difficulty and high cost in the xylitol refining process are successfully solved.

The present invention relates to a kind of metal ion doped graphene oxide film catalyst material at room temperature and efficiently and quickly catalyzes the purposes of sulfide oxidation synthesis sulfone.By adding metal ions in the dispersion of graphene oxide, so that graphene oxide interacts with metal ions and performs the doping of metal ions, then the dispersion of graphene oxide doped with metal ions is prepared as metal ion doped graphene oxide film catalyst material by vacuum filtration method, and the content of metal ions in metal ion doped graphene oxide film catalyst material is continuously adjustable.Compared with traditional catalytic method, the present invention is in the mode of continuous mobile phase reaction, and sulfide substrate and oxidant react in the two-dimensional interlayer confined channel of metal ion doped graphene oxide film catalyst material, and product flows out with mobile phase, and the catalytic method can realize the high conversion rate (90‑100%) of sulfide oxidation reaction at room temperature, high selectivity (60‑100%), fast (1‑60s) purpose of carrying out.

This invention discloses a recombinant *E. coli* strain for producing phenyllactic acid, a lactate dehydrogenase mutant, a whole-cell catalytic method for preparing phenyllactic acid, and the application of the aforementioned recombinant *E. coli* strain or lactate dehydrogenase mutant in the catalytic preparation of phenylpyruvic acid from phenyllactic acid. This invention significantly improves catalytic efficiency by modifying the 52nd amino acid of lactate dehydrogenase through site-directed mutagenesis. After mutating glutamine (Q) to valine (V) at position 52 of the *Lactobacillus mucosa* lactate dehydrogenase, the catalytic efficiency is significantly improved even at low cell density (OD). 600 =15) and substrate 15 g / L conditions, almost complete conversion was achieved; and combined with high-density catalysis and surface display optimization, the yield of phenyl lactic acid was increased while the downstream separation and purification costs were significantly reduced, greatly enhancing the potential for industrial production.

The utility model discloses a combined corrosive liquid storage device and catalytic flue gas desulfurization device, solve the technical problem of the heavy structure of regenerative liquid tank, high construction cost, long period and insufficient corrosion resistance. Including: prefabricated storage tank, prefabricated storage tank main part is made of corrosion -resistant thermoplastic polymer and is distributed to install the sleeve pipe made of corrosion -resistant thermoplastic polymer, and the both ends of each sleeve pipe are installed on the opposite two side walls of prefabricated storage tank and are sealed connection lead -through with corresponding pair of side wall opening respectively, and support structure contains the outer frame of installation in prefabricated storage tank and is used to accommodate and support prefabricated storage tank and the pull rod of distribution installation in outer frame, and each pull rod is correspondingly worn in the corresponding sleeve pipe and is drawn to tie up the opposite two side walls on outer frame respectively. Realized the factory prefabricated production, reduced the field construction workload and period greatly, reduced the civil engineering investment, ensured the long -term safety and reliability of corrosive liquid storage.

The invention belongs to the technical field of heterogeneous catalysis, and particularly relates to a catalytic method for joint production of alkylene oxide and diol, which comprises the following steps: S1, sequentially adding an organic solvent, hydrogen peroxide, alpha-olefin and a regulator into a tank reactor according to a certain proportion, and uniformly stirring; adding the Ti-M-MFI catalyst into the reactor, and sealing the reactor; and S2, introducing N2 into the reactor until the pressure is 0.1-1 MPa, heating to 40-60 DEG C while stirring, and reacting for 0.5-1 hour. And S3, rapidly reducing the reaction temperature to 20 DEG C or below, stopping stirring, discharging N2, and reducing the pressure in the reactor to normal pressure. And S4, rapidly raising the temperature to 60-80 DEG C, starting stirring, and reacting for 0.5-1 hour. According to the method, N2 is used for increasing the system pressure, the solubility of long-chain olefin in the reaction solution is maintained, the epoxidation step is promoted to be efficiently carried out, the temperature-variable reaction process is suitable for the epoxidation step and the hydration step respectively, and the reaction efficiency is improved.

The invention discloses a full-automatic photocatalytic reaction platform and a catalytic method thereof, and relates to the technical field of photocatalytic reaction. Comprising an outer box body and an ice maker, the ice maker is connected with the interior of the outer box body through a water pipe, a reaction chamber table is arranged at the top of the outer box body, a fixed protective cover is movably arranged at the top of the reaction chamber table, and an axial flow fan is arranged on the inner side of the fixed protective cover. According to the full-automatic photocatalytic reaction platform, the five groups of xenon lamp assemblies which are circumferentially and equidistantly distributed are adopted as light sources, light can be accurately refracted to the quartz test tube in cooperation with the refracting prism, and it is ensured that a sufficient and directional light source is obtained through photocatalytic reaction; the reflector assembly on the outer side of the xenon lamp holder further improves the light utilization rate. Meanwhile, an optical power meter probe arranged in the outer box body can detect the intensity of refracted light in real time, accurate illumination data support is provided for the test, and the consistency of illumination conditions of different batches of tests is guaranteed.

This invention discloses a method for the efficient catalytic hydrogenation of levulinic acid and its esters to prepare γ-valerol under mild conditions. The method uses water as the reaction solvent and a Ni3P / SBA-15 catalyst to catalyze the hydrogenation of levulinic acid and its esters in a high-pressure reactor or fixed-bed reactor under low-temperature conditions to selectively prepare γ-valerol. The Ni3P / SBA-15 catalyst is obtained by impregnating a Ni3P precursor onto SBA-15 and then reducing it in a hydrogen atmosphere. This invention offers a simple preparation method, readily available raw materials, low cost, and an environmentally friendly, pollution-free reaction process. Furthermore, the catalytic system is relatively simple, with high conversion rates of the reactants, and the γ-valerol yield can reach 100%. After 50 hours of reaction in a fixed-bed reactor, the yield of γ-valerol remains stable, indicating good catalyst stability. This method saves resources, reduces costs, and has promising prospects for industrial application.