332 results about "Hydroxymethylfurfural" patented technology

The invention discloses a cobalt-copper bimetallic nitrogen-doped carbon catalyst, which is characterized in that CoCu-coated LNC, Co and Cu nanoparticles are anchored on a nitrogen-doped carbon carrier derived from lignin. Accordingly, the inventor also establishes a corresponding preparation method, and the catalyst is prepared by taking lignin as a carrier, cobalt-copper bimetal as an active component and dicyandiamide as a nitrogen source through one-pot pyrolysis. The method has the characteristics of simple and efficient process, high catalyst stability and activity, economy, high efficiency, environmental friendliness and the like. The method is used for preparing 2, 5-furandicarboxylic acid through thermal catalytic oxidation of 5-hydroxymethylfurfural, the yield of the target product FDCA almost reaches 100%, and the application prospect is wide.

The invention provides a method for judging a processing end point of fried rice sprouts and a processing technology of the fried rice sprouts, and the method for judging the processing end point of the fried rice sprouts comprises the following steps: (1) mixing the fried rice sprouts with different frying time and an alcoholic solution, and carrying out ultrasonic extraction to obtain a series of test solution; (2) carrying out liquid chromatography detection on the series of test solutions, calculating peak area ratios of 4-coumaric acid to 5-hydroxymethylfurfural in the fried rice sprouts at different stir-frying times according to detection results, and taking a time period corresponding to a stable peak area ratio range between ratio mutation points as stir-frying time required for reaching a processing end point, and judging the processing end point of the fried rice sprouts. The method provided by the invention can objectively, accurately and clearly judge the processing end point of the fried rice sprouts, fills the blank of judgment of the processing end point of the fried rice sprouts, makes up for the situation of misjudgment caused by evaluation of the processing end point only by colors, realizes monitoring of the processing process of the fried rice sprouts, and can effectively guide the processing technology of the fried rice sprouts.

The invention discloses a low-foam acidic zinc plating additive and a preparation process thereof, and belongs to the technical field of electroplating additives, the additive comprises a low-foam softening agent and a water-based brightener, and the low-foam softening agent comprises the following raw materials in percentage by mass: 0.8-1.2% of polyethyleneimine, 0.03-0.06% of monododecyl phosphate potassium, 0.2-0.6% of water-soluble polyether amine and the balance of water. The water-based brightener is prepared from the following raw materials: 0.6 to 1.2 percent of 5-hydroxymethylfurfural, 0.2 to 0.4 percent of L-cysteine salt, 0.1 to 0.15 percent of 4-amino-2 (1H) pyrimidone, 0.05 to 0.1 percent of sodium salicylate, 1 to 1.5 percent of citric acid, 0.3 to 0.5 percent of alpha-ketoglutaric acid, 0.2 to 0.4 percent of erythorbic acid and the balance of water. The water-based formula is prepared by optimizing the components in the additive, the components are uniformly dispersed, the foam amount is low, and the plating quality is good.

The invention discloses 5-hydroxymethylfurfural and a preparation method thereof, and belongs to the technical field of chemical engineering. The preparation method comprises the following steps: reacting a homogeneous aqueous solution containing fructose, inorganic salt and an acid catalyst in a multi-kettle series reactor to obtain the 5-hydroxymethylfurfural, the inorganic salt is selected from at least one of halogen compounds, borides, silicate, aluminate, phosphate and borate; the acidic catalyst comprises at least one of water-soluble acids. The specific inorganic salt and the specific acid catalyst are added and can play a synergistic role, the reaction is carried out under multi-kettle series connection, the backmixing degree of the reaction materials in the reactor is maximized, side reactions can be effectively controlled, black rot is avoided, the reaction production efficiency and conversion rate are effectively improved, the reaction selectivity is improved, and the method is suitable for industrial production. And the equipment maintenance and labor cost is greatly reduced.

The invention discloses a preparation method of a sulfonic acid type covalent organic framework material and a preparation method of 5-hydroxymethylfurfural. The material is prepared by carrying out covalent condensation reaction on a monomer containing a sulfonic acid group precursor and a connecting ligand of a skeleton through a hot solvent method, and the catalyst has the characteristics of high crystallinity, large specific surface area, ordered pore structure, high sulfonic acid group density and uniform distribution. The preparation method is simple, convenient, efficient, mild in condition and high in yield. Compared with a traditional lewis acid catalyst for preparing 5-hydroxymethylfurfural through fructose dehydration, the material has the advantages of being uniform and adjustable in porosity, higher in active site, capable of promoting fructose hydrolysis and the like, efficient conversion can be achieved, side reactions and product transition polymerization are inhibited, and better industrialization prospects are shown.

The invention belongs to the technical field of preparation of bio-based platform compounds, and discloses a method for preparing 5-hydroxymethylfurfural by photocatalysis of glucose with a composite membrane, which comprises the following steps: by taking the composite membrane as a catalyst, mixing a glucose aqueous solution and a solvent under illumination conditions, and carrying out catalytic reaction to obtain crude 5-hydroxymethylfurfural production liquid; the method is used for solving the problems of low conversion rate, more byproducts, difficulty in continuous preparation, poor water resistance, strong corrosion and the like of the synthesis of 5-hydroxymethylfurfural. According to the method, a glucose solution passes through a composite membrane assembled by a mesoporous high-entropy sulfide membrane and a microporous zeolite molecular sieve membrane in a continuous flow manner, is efficiently isomerized into fructose under the action of illumination, and is dehydrated and continuously converted into 5-hydroxymethylfurfural. The composite membrane used in the method is high in water resistance, clean and non-toxic, has double functions of reaction and separation, effectively prevents the 5-hydroxymethylfurfural from further reacting with substances such as water and the like to generate humus, and realizes high-selectivity and continuous preparation of the 5-hydroxymethylfurfural.

The invention discloses a carbon-doped carbon nitride nanotube as well as a preparation method and application thereof in photocatalytic reaction, and belongs to the technical field of inorganic photocatalytic nano materials. Comprising the following steps: roasting urea, melamine and 2, 4, 6-triaminopyridine under protective gas; adding the carbon-doped carbon nitride nanotube, 5-hydroxymethylfurfural and chloroplatinic acid hexahydrate into the deionized water; photocatalytic hydrogen evolution is started to cooperate with selective oxidation reaction of 5-hydroxymethylfurfural. The carbon-doped carbon nitride prepared by the preparation method disclosed by the invention is in a nanotube shape; and the catalyst can be effectively applied to solar photocatalytic hydrogen evolution to cooperate with selective oxidation of 5-hydroxymethylfurfural to generate 2, 5-diformyl furan. The invention mainly solves the problems that the value-added reaction cooperated with the hydrogen production process cannot be realized and the overall economic value cannot be improved in the traditional hydrogen production means. The method is an effective, practical and simple method, is suitable for laboratory preparation and industrial production, and has huge development space and application prospect.

The invention discloses a metal organic coordination porous polymer derivative catalyst for preparing 2, 5-dimethylfuran through hydrogenation of 5-hydroxymethylfurfural, and the catalyst is prepared by calcining and deriving after anchoring a metal active component by a metal organic coordination porous polymer, the metal organic coordination porous polymer is formed by coordination of one or two metals selected from cerium and zirconium and an organic carboxylic acid ligand; the metal active component is at least one of copper, nickel and cobalt. The invention discloses an application of a catalyst in preparation of 2, 5-dimethylfuran by hydrogenation of 5-hydroxymethylfurfural. According to the invention, the anchoring capability of uncoordinated carboxylic acid of an organic carboxylic acid ligand in the metal organic coordination porous polymer is utilized to stabilize the metal active component, the agglomeration phenomenon in the calcining and reaction process is obviously inhibited, and meanwhile, the mass transfer path of reactants is optimized through ordered pore channels of the metal organic coordination porous polymer. The catalyst provided by the invention improves the conversion rate of 5-hydroxymethylfurfural and the selectivity of 2, 5-dimethylfuran.

The invention relates to the technical field of chemical synthesis, and discloses a method for preparing 2, 5-furandicarboxylic acid, which comprises the following steps: dispersing cobalt nitrate and nickel sulfate into an aqueous solution of polyvinylpyrrolidone at room temperature; adding a sodium borohydride solution to obtain nano colloid; preparing an aqueous suspension of cerium oxide, and adding the aqueous suspension into the nano colloid; centrifugally filtering, and recovering a solid product; washing the solid product; centrifuging, putting solid powder obtained after centrifuging into a drying oven, and drying; and calcining and grinding the solid powder to finally prepare the Co-Ni / CeO2 catalyst. And dissolving 5-hydroxymethylfurfural in water at normal temperature, adding the prepared Co-Ni / CeO2 catalyst and a sodium hypochlorite solution, reacting, and filtering to remove the catalyst, thereby obtaining the 2, 5-furandicarboxylic acid. The method disclosed by the invention has the advantages of no use of strong base, low reaction temperature, short reaction time, few byproducts, greenness and sustainability.

The invention provides a continuous flow preparation method of a CuPd / C catalyst. The method is simple and efficient, and one-step and continuous production can be realized. The method has the core advantages that multi-phase flow is ordered, the mixing efficiency is high, reaction parameters are accurate and adjustable, the repeatability and the automation degree are remarkably superior to those of a traditional impregnation method, and the problems that the traditional method is long in time consumption, low in selectivity, high in operation dependency, uneven in mixing and the like are effectively solved. In addition, catalyst synthesis conditions are screened, and optimal preparation conditions are determined. According to the CuPd / C catalyst prepared by the method, the conversion rate of 2, 5-dimethylfuran prepared from 5-hydroxymethylfurfural can reach 100%, and the selectivity of 2, 5-dimethylfuran can reach 97.5%. Compared with a CuPd / C catalyst prepared by an impregnation method, the yield of 2, 5-dimethylfuran is improved by more than 34.5%, and is superior to most reported catalysts at present. And mechanical operation can avoid personal errors, so that the result is easier to repeat, and the production efficiency is improved.

The invention discloses a liquid chromatography method for measuring 5-hydroxymethylfurfural in a calcium gluconate and sodium chloride injection. The method comprises the following steps: measuring the calcium gluconate and sodium chloride injection as a test solution; weighing 5-hydroxymethylfurfural, and adding water to dilute the 5-hydroxymethylfurfural to form a reference solution; carrying out continuous sample introduction on the liquid chromatograph by using the reference substance solution to obtain a system applicability solution chromatogram; when the chromatogram of the applicable solution of the system meets the standard, measuring the test solution and the reference solution, respectively injecting the test solution and the reference solution into a liquid chromatograph, and recording the chromatograms; the content of 5-hydroxymethylfurfural in the calcium gluconate and sodium chloride injection is obtained through a 5-hydroxymethylfurfural content calculation formula. The method has the advantages of strong specificity, high sensitivity, good precision, strong durability and the like, and can quantitatively detect 5-hydroxymethylfurfural in the calcium gluconate and sodium chloride injection, so that the safety of clinical medication of the calcium gluconate and sodium chloride injection is improved.

The invention provides a preparation method for synthesizing 5-hydroxymethylfurfural by catalyzing glucose through a phosphotungstic acid modified molecular sieve catalyst. Organic amine is adopted as a template to synthesize a silicoaluminophosphate (SAPO) molecular sieve, the SAPO molecular sieve subjected to high-temperature activation is adopted as a catalyst, the SAPO molecular sieve and phosphotungstic acid are subjected to composite roasting, a phase transfer catalyst is added into a two-phase medium of an organic solvent and water, glucose is dehydrated and converted into 5-hydroxymethylfurfural (5-HMF), the yield of the 5-HMF is 50% or above, and the selectivity of the 5-HMF exceeds 90%. After the catalyst is recycled for multiple times, the yield of 5-HMF exceeds 40%.

The application discloses a bimetallic doped hierarchical porous carbon catalyst and a preparation method and application thereof. The bimetallic doped hierarchical porous carbon catalyst is prepared from two transition metal salts and specific biomass powder as raw materials through 160-180 DEG C hydrothermal carbonization and 200-500 DEG C calcination. The catalyst has simple components, is cheap, and has a simple preparation process. The catalyst can efficiently catalyze synthesis of 2,5-furan dicarboxylic acid from 5-hydroxymethylfurfural under mild conditions. The target product has high yield and simple separation, and has a good industrial application prospect.

The invention discloses a method for preparing 2, 5-diformyl furan by selectively oxidizing 5-hydroxymethylfurfural, which comprises the following steps of: reacting 5-hydroxymethylfurfural serving as a raw material, air or oxygen serving as an oxidant, nitrate or ferric salt and sodium iodide serving as main active components of a catalyst and DMSO (dimethylsulfoxide) serving as a solvent at the temperature of between 80 and 160 DEG C for a certain time under the condition of normal pressure, and separating a product to obtain the 2, 5-diformyl furan. The ferric salt is ferric nitrate nonahydrate, and the catalyst is 2, 5-diformyl furan. The dosage of the ferric salt is 0 to 0.50 mmol; the use amount of the sodium iodide is 0 to 0.50 mmol. According to the method, DMSO is adopted as a solvent, the used catalyst is cheap and easy to obtain, the yield of 2, 5-diformyl furan can reach 95% at most after the reaction is carried out at 140 DEG C for 20 h, the requirement for equipment is low, and the method is suitable for industrial production.

The application belongs to the technical fields of functional material preparation, catalysis and transition metal complex material, and discloses a selenium compound heterojunction catalyst coupled with hydrogen evolution, a method and application. In preparation, a cobalt source, urea, a foamed nickel and an ammonium fluoride mixed solution are mixed in a reaction, and after being hydrothermally synthesized and cooled to room temperature, the precursor Co(OH)2 / NF is obtained by washing with ethanol and water and drying. Then, selenium powder and a strong base are added into a reaction kettle, and heating is performed to obtain the heterojunction catalyst NiSe@CoSe2 / NF with high density. The obtained heterojunction material can be used for electrocatalysis of 5-hydroxymethylfurfural. When the current density is 10 mAcm ‑2 , the potential is 1.29 V, and the optimal conversion rate is more than 98%, and the catalyst has excellent catalytic activity for electrocatalysis of 5-hydroxymethylfurfural oxidation.

The invention relates to a process for the production of a mixture of 5-hydroxymethylfurfural and glucose from a feedstock containing fructose in the presence of at least one polar aprotic solvent and of at least one dehydration catalyst, in which process the reaction temperature is less than 90° C.

The invention relates to a spleen-tonifying, appetite-stimulating and digestion-promoting traditional Chinese medicine preparation UPLC detection method and a fingerprint spectrum, and belongs to the technical field of medicine detection. The invention aims to solve the technical problems that the existing quality control method of the spleen-tonifying, appetite-promoting and digestion-promoting pills lacks comprehensive and objective analysis on the spleen-tonifying, appetite-promoting and digestion-promoting pills, and the problems of low precision, poor reproducibility, low efficiency and the like during detection of related components in the prior art are solved. According to the technical scheme, the UPLC detection method is characterized in that a mixed standard substance of gallic acid, 5-hydroxymethylfurfural, chlorogenic acid, sinapine thiocyanate, sinapic acid, hyperoside, 3, 6-dimustard acyl sucrose, hesperidin, naringenin, nobiletin and hesperetin is taken as a contrast, an acetonitrile-0. 1% formic acid aqueous solution is taken as a mobile phase, gradient elution is carried out, and the content of chlorogenic acid in the sample is detected. The qualitative and quantitative detection of the effective components of the spleen-tonifying, appetite-promoting and digestion-promoting pill is realized.

The present invention relates to a metal nitrate hydrate catalyst and a method for preparing 5-hydroxymethylfurfural, using same and, more specifically, may provide: a catalyst which comprises a metal nitrate hydrate and is to prepare 5-hydroxymethylfurfural (HMF) from at least one selected from the group consisting of monosaccharides and disaccharides; and a method for preparing 5-hydroxymethylfurfural (HMF), the method comprising (a) a step of preparing 5-HMF by reaction in the presence of the catalyst from a sugar comprising at least one selected from the group consisting of monosaccharides and disaccharides. The present invention provides high 5-HMF yield and selectivity, biological and process stability, and economic efficiency by using inexpensive monosaccharides and / or disaccharides.

The application discloses a low-foam acid zinc plating additive and a preparation process thereof, and belongs to the technical field of electroplating additives. The additive comprises a low-foam softener and a water-based brightener. The low-foam softener comprises the following raw materials in percentage by mass: polyethylene imine 0.8-1.2%, monododecyl phosphate potassium 0.03-0.06%, water-soluble polyether amine 0.2-0.6%, and the balance is water. The water-based brightener comprises the following raw materials: 5-hydroxymethyl furfural 0.6-1.2%, L-cysteine salt 0.2-0.4%, 4-amino-2(1H) pyrimidinone 0.1-0.15%, sodium salicylate 0.05-0.1%, citric acid 1-1.5%, alpha-ketoglutaric acid 0.3-0.5%, isoascorbic acid 0.2-0.4%, and the balance is water. The application optimizes the components in the additive, prepares a water-based formula, and the components are uniformly dispersed, the foam amount is low, and the plating layer quality is good.

The application discloses an evaluation method for distinguishing different quality of momordica grosvenori of different origins. The application adopts high performance liquid chromatography to establish the fingerprint of momordica grosvenori, carries out gradient elution by taking water-acetonitrile as a mobile phase, and detects the wavelength of 203 nm to obtain the HPLC fingerprint of momordica grosvenori; the obtained chromatogram is introduced into a traditional Chinese medicine chromatographic fingerprint similarity evaluation system to generate a control fingerprint, different origins of momordica grosvenori are distinguished through similarity comparison and / or chemical pattern recognition analysis; and chemical markers with VIP>1 such as 5-hydroxymethyl furfural, momordica grosvenori flavonoid, momordica grosvenori saponin V and momordica grosvenori saponin IIIA2 are screened. The application can effectively distinguish two main origins of green skin fruit and red hair fruit, overcomes the defects that traditional trait identification is subjective and it is difficult to distinguish similar appearance samples, and provides an objective, accurate and stable technical means for origin identification, quality consistency evaluation and authenticity identification of momordica grosvenori.

This invention relates to the field of traditional Chinese medicine detection technology, specifically providing characteristic chromatograms of germinated rice or roasted germinated rice and their preparations, and their construction methods. Using octadecylsilane-bonded silica gel as the packing material, the mobile phase includes methanol and formic acid aqueous solution, gradient elution, and a specific elution program obtained through extensive experimental screening, yielding more than 13 common characteristic peaks. Effective separation of characteristic peaks including uridine, adenosine, guanosine, 5-hydroxymethylfurfural, 4-coumaric acid, and ferulic acid is achieved, with good peak shape, stable baseline, complete separation of the measured components, and short detection time. This provides a basis for the quality detection and control of germinated rice or roasted germinated rice and their preparations, fully reflecting the integrity and characteristics of germinated rice or roasted germinated rice and their preparations. The method is simple to operate and applicable to the quality control of different types of germinated rice or roasted germinated rice preparations.

The invention provides a halogen-free fireproof aluminum-plastic composite panel and a preparation method thereof, and belongs to the technical field of building materials, and the halogen-free fireproof aluminum-plastic composite panel comprises aluminum plate layers and a flame-retardant core layer located in the middle of the aluminum plate layers. The flame-retardant core layer comprises modified polyester resin and an auxiliary additive, the modified polyester resin comprises the following components in parts by weight: 40-60 parts of terephthalic acid, 20-40 parts of ethylene glycol, 5-10 parts of a flame-retardant monomer and 1-3 parts of a catalyst, and the flame-retardant monomer is prepared by reacting 5-hydroxymethylfurfural with 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide. The flame-retardant monomer participates in polycondensation of polyester like terephthalic acid or ethylene glycol, and the flame-retardant effect and the mechanical property of the polyester resin can be improved at the same time.

A synthesis method of 2,5-dihydroxymethyl tetrahydrofuran, comprising: 5-hydroxymethyl furfural is contacted with hydrogen after a plasma generator in the presence of a non-noble metal catalyst to generate 2,5-dihydroxymethyl tetrahydrofuran. The present application uses 5-hydroxymethyl furfural (5-HMF) as raw material, and synthesizes DHMTHF by hydrogen plasma coupling non-noble metal catalyst. The method of the present application does not need to use noble metal, utilizes the high reactivity of excited state particles in hydrogen plasma, reduces the reaction pressure and reaction temperature, and the plasma has the effect of dispersing the catalyst active metal again. The whole reaction process has the characteristics of relatively mild reaction conditions, low hydrogen consumption, high selectivity of target product, simple process, good stability of catalyst, low cost of catalyst, etc.

The invention belongs to the technical field of photocatalysis, and particularly relates to a composite catalyst as well as a preparation method and application thereof. The preparation method of the composite catalyst comprises the following steps: by taking melem as a photocatalytic active center, mixing melem with an H < + > solution at room temperature, and providing additional active sites by utilizing interaction between H < + > in a Bronsted acid solution and melem molecules, so as to prepare the composite catalyst with a synergistic catalytic effect. The acid group is introduced to the surface of the photocatalyst for modification, so that the modified photocatalyst has the properties of a solid acid catalyst at the same time, glucose is induced to be isomerized into fructose under the photocatalysis action of the composite catalyst, and meanwhile, under the synergistic effect of acid catalysis and photocatalysis in the composite catalyst, the fructose content is increased. Fructose is converted into hydroxymethylfurfural with high selectivity, and efficient and targeted preparation of hydroxymethylfurfural under a pollution-free condition is realized.

The invention provides a method for preparing 2, 5-diformyl furan by catalyzing fructose by using an ionic liquid and a vanadium complex, which comprises the following steps: carrying out dehydration reaction by using the fructose as a raw material and the ionic liquid as a reaction solvent and a catalyst to obtain 5-hydroxymethylfurfural, then adding a V / HCP-AQ catalyst, and carrying out oxidation reaction on the 5-hydroxymethylfurfural in an oxygen atmosphere to obtain the 2, 5-diformyl furan. And 3, 5-diformyl furan is obtained. According to the method, the ionic liquid is adopted to replace DMSO to serve as a fructose dehydration and oxidation solvent, ethyl acetate is added into a reaction system for extraction after the reaction is finished, the product 2, 5-diformyl furan can be obtained, and the problem that the product is difficult to separate in the process of preparing the 2, 5-diformyl furan through the fructose one-pot method under a traditional catalytic system is solved.

The present invention provides a method for simultaneously determining 5-hydroxymethylfurfural and its oxidation product, including: providing a reaction mixture obtained after 5-hydroxymethylfurfural is oxidized, the reaction mixture comprising 5-hydroxymethylfurfural and its oxidation product; filtering the reaction mixture to obtain a filtrate and a filter residue; preparing the filtrate as a first solution to be tested, mixing the filter residue with an inorganic base so that the insoluble oxidation product in the filter residue undergoes a salt-forming reaction and dissolves, and preparing the filtrate as a second solution to be tested; performing high performance liquid chromatography analysis on the first solution to be tested and the second solution to be tested, respectively, the conditions for high performance liquid chromatography analysis comprising: an organic acid analytical column as the stationary phase, and a column temperature of 25°C to 60°C; an inorganic acid aqueous solution as the mobile phase, and a flow rate of the mobile phase of 0.4 to 1 mL / min; an injection volume of 1 μL to 20 μL; and adopting dual wavelength detection, with a first detection wavelength of 200 nm to 240 nm and a second detection wavelength of 250 nm to 300 nm. The method provided by the present invention has good separation, high accuracy, and high precision.

Process for the production of 5-hydroxymethyl-2-furancarboxylic acid (HMFA), wherein 5-hydroxymethylfurfural (HMF), which is present in an aqueous solution, is oxidized to obtain 5-hydroxymethyl-2-furancarboxylic acid (HMFA) by treatment with an NAD(P)+-dependent aldehyde dehydrogenase in vitro with NAD(P)H being formed; after said oxidation step the NAD(P)H formed during the oxidation is enzymatically regenerated with an oxidoreductase back to NAD(P)+, and a keto compound is used as a cosubstrate of the oxidoreductase.

The invention discloses a preparation method for synthesizing 2, 5-furandimethanol (BHMF) from biomass saccharides through a one-pot method based on a water-phase catalysis system, and belongs to the technical field of chemical synthesis. According to the method, in a single water phase reaction system, efficient catalytic conversion is realized through two key steps of integrating biomass sugar dehydration to generate 5-hydroxymethylfurfural (HMF) and biologically reducing HMF to convert into BHMF. Wherein in the dehydration reaction stage, an acid catalyst is adopted, and a polyethylene glycol additive is introduced, so that the yield of HMF is remarkably increased, the generation of by-products levulinic acid and formic acid is effectively inhibited, and the toxic influence of the by-products on thalli in the subsequent reduction stage is reduced; meanwhile, due to the excellent biocompatibility, the inhibition effect on the thallus activity in the whole-cell catalytic reduction process is avoided. The innovative design ensures the continuity and system compatibility of the whole catalytic process, and realizes an efficient and stable catalytic conversion process.

The invention discloses a method for preparing 2, 5-furandicarboxaldehyde based on photocatalytic oxidation of BiVO4 / Cs2AgBiBr6 with a wavelength of 440 to 450 nm. The specific method comprises the following steps: preparing a perovskite photocatalytic material BiVO4 / Cs2AgBiBr6; the prepared BiVO4 / Cs2AgBiBr6 is added into a 5-hydroxymethylfurfural (HMF) anhydrous acetonitrile solution, and a photocatalytic oxidation experiment is carried out under the condition of an LED lamp with the wavelength of 440-450 nm. According to the technical process, HMF can be efficiently converted to synthesize 2, 5-furandicarboxaldehyde (DFF), reaction conditions are mild, operation is easy, the method is a cheap and efficient DFF preparation method, reference is provided for renewable biomass resource conversion, and the method has important significance on development of novel renewable energy sources.

The invention discloses a method for preparing 2,5-furan dimethanol by catalytic hydrogenation of 5-hydroxymethylfurfural, and belongs to the field of fine chemical technology. The method is prepared by reducing a bimetallic aqueous solution with sodium borohydride to obtain a bimetallic catalyst, and then 5-hydroxymethylfurfural, a bimetallic catalyst and isopropanol are added to a reactor, and at a stirring rate of 500rpm, a closed reaction 1-5h is carried out at 100-140 DEG C to obtain a reaction product 2,5-furan dimethanol, 5-hydroxymethylfurfural conversion rate is up to 99.4%, and 2,5-furan dimethanol yield is up to 97.2%. The catalyst preparation method is extremely simple, low in price, and the catalytic system is green and efficient, with broad application prospects.