91 results about "Valerolactone" patented technology

The application belongs to the technical field of deep eutectic solvents, and particularly relates to a ternary deep eutectic solvent and preparation and application thereof. The ternary deep eutectic solvent is composed of choline chloride, 5-sulfosalicylic acid and gamma valerolactone according to a molar ratio of 1:4:(3-25). The strong hydrogen bond network structure between the green solvent system first destroys the ester bond between lignin and hemicellulose, then cuts off the beta-O-4 bond between lignin molecules, so as to separate lignin. Meanwhile, the deep eutectic solvent can improve the stability of carbon cations due to the conjugation effect between the lone pair electrons on the heteroatom oxygen and the central carbon in the molecular structure of gamma valerolactone, so as to inhibit the condensation reaction of lignin.

The invention relates to the field of chemical synthesis, in particular to a preparation method of chlorinated alkyl polyphosphate, which comprises the following steps: mixing diethylene glycol and gamma-valerolactone, slowly adding phosphorus oxychloride, and reacting at 20-50 DEG C to generate a reaction solution containing an intermediate; adding gamma-valerolactone and an IL (at) MOFs-P catalyst into the reaction solution, slowly adding epoxypropane, and reacting at 130-150 DEG C in a nitrogen atmosphere to generate a target product mixed solution; and recovering gamma-valerolactone through distillation, centrifugally separating the catalyst, regenerating and recycling, and purifying a crude product to obtain a final product. The green solvent gamma-valerolactone is adopted and recycled, the IL-coated MOFs-P catalyst is high in activity and can be recycled, side reactions are reduced by accurately controlling reaction conditions, the product yield reaches 90% or above, the purity exceeds 98%, and the method has the advantages of being green, environmentally friendly, economical and efficient.

The invention belongs to the field of photovoltaic module recovery, and discloses a method for treating an EVA (Ethylene Vinyl Acetate) adhesive film of a decommissioned photovoltaic module by a low-temperature chemical method. The method comprises the following steps of: disassembling the decommissioned photovoltaic module and cutting the decommissioned photovoltaic module into small samples; pretreating the sample; and putting the pretreated sample into a mixed solution of gamma-valerolactone, D-limonene, polyethylene glycol, absolute ethyl alcohol, 2-methylimidazole and polydimethylsiloxane, and soaking at low temperature, so that the EVA adhesive film is swelled, the adhesive force between the EVA adhesive film and the battery piece is reduced, and the separation of the EVA adhesive film and the battery piece is realized. Treatment can be carried out at low temperature, energy consumption is remarkably reduced, and the environment-friendly requirement is met; the operation process is simple, and the treatment period is short.

The invention belongs to the technical field of synthesis of organic compounds, and particularly relates to a process for preparing fipronil and an intermediate thereof. Toxic 1, 2-dichloroethane is comprehensively replaced by bio-based gamma-valerolactone, low-toxicity cyclopentyl methyl ether is matched, and N, N-dimethylformamide necessary for the process is recycled, so that consumption is greatly reduced; the continuous processes of amination, diazotization and the like are realized through a tubular reactor, a micro-reactor and a static mixer, and separation technologies such as pervaporation membrane and vacuum distillation are combined, so that the reaction time is shortened, the solvent recovery rate is increased, and the production is promoted to be continuously transformed to green. The supported FeCl3 / SiO2-NH2 catalyst disclosed by the invention can be repeatedly used, and byproducts and tail gas can be recycled and reused. In addition, diazonium salt residues are controlled to be smaller than or equal to 0.5% through near infrared spectroscopy, citric acid is subjected to stable oxidation reaction, a purification process is combined, it is ensured that the finished product is high in purity, excellent in yield and small in batch fluctuation, and efficiency and safety are both considered.

The application discloses a method for preparing gamma-valerolactone by catalyzing acetylpicoline acid hydrogenation with molybdenum selenide, and aims to solve the problems of low catalytic efficiency and harsh reaction conditions of existing non-noble metal catalyst systems. The method comprises the following steps: placing molybdenum selenide catalyst, acetylpicoline acid and a solvent as raw materials in a high-pressure reaction kettle, replacing the air in the high-pressure reaction kettle with hydrogen gas at room temperature for multiple times, then continuously feeding hydrogen gas until the pressure in the high-pressure reaction kettle reaches 0.5-3.0 MPa, magnetically stirring the reaction under the pressure range, at a temperature of 100-200 DEG C and in a hydrogen atmosphere, and then cooling to room temperature, so as to obtain gamma-valerolactone. The catalyst used in the application is prepared under hydrothermal conditions, and due to the sheet morphology of the molybdenum selenide catalyst, rich edge active sites are presented, so that the conversion rate of acetylpicoline acid and the selectivity of gamma-valerolactone can reach 100% under mild reaction conditions.

Provided is a dendritic cell activator that contains, as an active ingredient, a component derived from a natural product which has been eaten for many years and the safety of which has been empirically confirmed, and that is used for inducing or promoting an acquired immune response effective against cancer or infectious disease. Specifically provided are: a dendritic cell activator containing, as an active ingredient, 5-(3,5-dihydroxyphenyl)-y-valerolactone represented by formula (I); and a medicine, a supplement, and a food or beverage each containing the compound represented by formula (I) as an active ingredient. [The configuration of the wavy line may be either R-form or S-form.]

The invention relates to a process for the manufacturing of biobased 3-methyl-delta-valerolactone (3MdVL) and 3-methyl-1,5-pentanediol (3MPD) via one- pot hydrogenation of anhydromevalonolactone (aMVL) in the presence of a Raney- Nickel catalyst. The hydrogenation occurs without solvent at a temperature from 120ºC-180ºC, preferably at 130ºC-170ºC and a pressure between 15-30 bar, preferably at a pressure between 18 and 22 bar. The hydrogenation time may vary between 3 and 25 hours, preferably between 6 and 24 hours.

The invention discloses a beta-ketimine type binuclear aluminum complex and a preparation method thereof. The binuclear aluminum complex can be used for catalyzing ring opening polymerization of caprolactone, lactide, glycolide, valerolactone, butyrolactone or ethylene carbonate. The invention further discloses a preparation method and application of the binuclear aluminum complex. The preparation method is simple, the reaction condition is mild, the prepared beta-ketimine type binuclear aluminum complex is used as a catalyst, the catalytic activity is high, the stability is good, the service life is long, the molecular weight distribution of the obtained polymerization product is narrow, and the beta-ketimine type binuclear aluminum complex can be well applied to the ring-opening polymerization reaction of cyclic ester.

The invention discloses a precursor solution preparation method and a perovskite solar cell preparation method. The method comprises the following steps: preparing a perovskite precursor solution by taking dimethyl sulfoxide, 2-methyltetrahydrofuran and gamma-valerolactone as solvents; and adding a perovskite material into the solvent to form a perovskite precursor solution. A full-green solvent system composed of dimethyl sulfoxide, 2-methyltetrahydrofuran and gamma-valerolactone is adopted to prepare a precursor solution, the perovskite solar cell is prepared from the precursor solution, a specific solvent combination is matched with a corresponding coating rate and regulation and control crystallization kinetics, and a uniform and compact high-quality perovskite thin film can be prepared on a large area. The device efficiency is improved.

The application relates to the field of industrial cleaning and film stripping technology, in particular to a magnetic force polishing film stripping agent and a preparation method thereof, which is prepared from the following raw materials in percentage by weight: 10-20% of environment-friendly organic solvent, 1-10% of corrosion inhibitor, 5-15% of surfactant, 5-15% of lubricant, 1-10% of organic additive, 1-5% of chelating agent, and the rest of deionized water; the environment-friendly organic solvent is composed of D-limonene and gamma-valerolactone; by adopting the above formula, the organic film layers such as acrylate and epoxy resin can be quickly softened and peeled off at normal temperature to 50 DEG C, and high temperature or ultrasonic assistance is not needed, so that energy consumption is reduced. The system does not contain strong acid and strong base, the corrosion inhibitor can form effective protection on active metals such as aluminum, magnesium and zinc, and corrosion and surface damage are avoided; the surfactant and the lubricant can synergistically improve wetting and permeability and reduce mechanical scratches; the chelating agent can stabilize metal ions and prevent redeposition; the organic additive can optimize dissolution kinetics. The overall formula is low-toxic and low-volatility, and has high film stripping efficiency and substrate compatibility.

This invention discloses a method for preparing a metal phosphide catalyst. The method involves uniformly mixing a carbon-containing precursor with a phosphorus-containing precursor solution and then drying the mixture to obtain a solid product. The solid product is then pyrolyzed under an inert atmosphere. The pyrolyzed solid product is washed and dried to obtain a phosphorus-doped carbon material. A metal salt solution is then uniformly mixed with the obtained phosphorus-doped carbon material, dried, and reduced under a hydrogen-containing gas atmosphere to obtain the metal phosphide catalyst. Thus, this invention prepares phosphorus-doped porous carbon through the pyrolysis of a carbon precursor and a phosphorus-containing precursor. This utilizes the binding effect of phosphorus functional groups with metal ions to inhibit the migration and aggregation of metal particles under high-temperature conditions, effectively preventing metal particle sintering and improving the yield of the target catalytic product.

The application discloses green cross-linked polyvinyl acetal porous powder and a preparation method and application thereof, and relates to the technical field of polymer materials. The green cross-linked polyvinyl acetal porous powder is prepared by heterogeneous cross-linking reaction of polyvinyl acetal porous powder and a bio-based cross-linking agent in a green solvent, wherein the polyvinyl acetal porous powder is prepared by acetal reaction of polyvinyl alcohol and an aldehyde compound under the action of an acid catalyst. The bio-based cross-linking agent derived from natural oil or sugar is used to replace the traditional chemical synthetic cross-linking agent, and the green solvent system of gamma-valerolactone / ethanol is used to replace the traditional volatile organic solvent, so that VOC emission and the use of toxic substances are avoided from the source, the VOC content is only 12-15 g / L, the green cross-linked polyvinyl acetal porous powder has good environmental friendliness, and meanwhile, has excellent solvent resistance and low-temperature flexibility, and can be widely applied in the fields of flexible electronic packaging materials, green powder coatings, environment-friendly adhesives and the like.

A first aspect of the present invention relates to a method for removing a plasticizer from a polymeric material, the method comprising the steps of: (a) providing a polymeric material comprising a polymer and a plasticizer, and providing a solvent comprising gamma-valerolactone; and (b) contacting the polymeric material with the solvent comprising gamma-valerolactone, thereby obtaining a liquid mixture comprising the solvent, dissolved polymer, and dissolved plasticizer. In a second aspect, the present invention relates to a polymer obtained or obtainable from the method according to the first aspect. In a third aspect, the present invention relates to a plasticizer obtained or obtainable from the method according to the first aspect. In a fourth aspect, the present invention relates to the use of a polymer obtained or obtainable by the method according to the first aspect to prepare a polymeric product. In a fifth aspect, the present invention relates to the use of a plasticizer obtained or obtainable by the method according to the first aspect to prepare a soft polymer. In a sixth aspect, the present invention relates to a method for further processing a plasticizer, the method comprising one or more post-treatment steps selected from the group consisting of hydrolysis, hydrogenation, and transesterification.

A preparation method of a rare earth-containing heterojunction catalyst material CeO2 / Sm-MOF comprises the following steps: mixing and dissolving samarium nitrate hexahydrate and H4TBAPy in a composite solvent to form a mixed solution, carrying out a hydrothermal reaction to obtain Sm-MOF, mixing and dissolving ceric ammonium nitrate and Sm-MOF in an aqueous solution of gamma-valerolactone, then adding H2O2 and triethanolamine to form a mixed solution, carrying out magnetic stirring at 45-55 DEG C for 2-3 h, and carrying out hydrothermal reaction to obtain the rare earth-containing heterojunction catalyst material CeO2 / Sm-MOF. And then carrying out hydrothermal reaction and roasting treatment. The thermal stability of Sm-MOF is improved, ceric ammonium nitrate is adopted as a Ce source, a two-step heat treatment process is combined, the binding force and distribution uniformity of CeO2 on the surface of Sm-MOF are effectively improved, the catalytic activity and cycle stability of CeO2 / Sm-MOF are improved, and the Sm-MOF / CeO2 composite material has excellent degradation efficiency on MB, RhB, ATZ, CIP and the like and has excellent cycle stability in the cycle process.

The invention provides a green synthesis method and application of hybrid perovskite microcrystal powder. The green synthesis method of the hybrid perovskite microcrystal powder comprises the steps that AX, PbX2 and gamma-valerolactone are subjected to a mixed reaction and then subjected to purification treatment, A comprises at least one of MA < + >, FA < + > and Cs < + >, X comprises at least one of Cl <->, Br <-> and I <->, and the purification treatment comprises gradient washing with ethyl acetate and methyl acetate. The green synthesis method disclosed by the invention shows remarkable advantages of environmental friendliness, simplicity and convenience in operation, improvement of microcrystal quality and purity, optimization potential of photoelectric properties, cost and synthesis efficiency, controllability of crystal boundaries and defects of the prepared microcrystal film, enhancement of microcrystal stability, expandability and application universality. The invention also provides the hybrid perovskite microcrystal powder and application thereof in the photovoltaic field.

The invention relates to the technical field of flame retardants, and discloses an efficient organophosphorus DI-DOPO flame retardant and a preparation method thereof.The preparation method comprises the following steps that S1, an olefinic bond-containing intermediate is prepared, specifically, allyl glycidyl ether, diethanol amine, polyethylene glycol monomethyl ether acrylate and glycerol react to obtain the olefinic bond-containing intermediate; s2, preparing a phosphorus-containing monomer: reacting the olefinic bond-containing intermediate, DOPO (9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide), a sulfonic acid functionalized mesoporous molecular sieve catalyst as a catalyst, vanillin glycidyl ether as a modifier and a gamma-valerolactone solvent as a modifier to obtain a grafted and modified refined phosphorus-containing monomer; and S3, preparation of a DI-DOPO flame retardant: carrying out a reaction on a phosphorus-containing monomer, a compound of gamma-methacryloxypropyltrimethoxysilane and cardanol acrylate, a mixed solvent of ethyl acetate and ethanol, and an initiator 2, 2 '-azobis (2-methylpropionamide) dihydrochloride, so as to obtain the final efficient organic phosphorus DI-DOPO flame retardant, wherein the phosphorus-containing monomer, the compound of gamma-methacryloxypropyltrimethoxysilane and cardanol acrylate, the mixed solvent of ethyl acetate and ethanol, and the initiator 2, 2'-azobis (2-methylpropionamide) dihydrochloride are subjected to a reaction.

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.

The application belongs to the technical field of biomass catalytic conversion, and specifically discloses a gallium-modified dealuminized H-ZSM-5 catalyst, a preparation method and application thereof, and the method comprises the following steps: ion exchange is performed on Na-ZSM-5 molecular sieve and an ammonium salt solution; selective dealuminization is performed on NH4-ZSM-5 molecular sieve and an ammonium hexafluorosilicate solution; and the impregnation method is used to load a gallium salt solution to the dealuminized molecular sieve carrier DeAl-H-ZSM-5, so as to obtain the gallium-modified dealuminized H-ZSM-5 catalyst. The application adopts the above-mentioned gallium-modified dealuminized H-ZSM-5 catalyst, the preparation method and application thereof, and the method is characterized in that the composite strategy of purifying the base by selectively dealuminizing first and then precisely loading Ga to regulate the acidity is adopted, the prepared catalyst can efficiently catalyze the preparation of furfural from pentose in a γ-valerolactone / water system, and high conversion rate and high selectivity are realized.

A method of forming gamma valerolactone (GVL) includes contacting a mixed feed stream comprising unreacted 3-pentenenitrile (3PN) and water within a first reactor in the presence of a heterogeneous catalyst. The reaction can occur at a temperature range of 100°C to 400°C and under a pressure of 150 pounds per square inch (psi) or less. The method involves separating unreacted 3PN and water from the GVL product, then routing these unreacted components back to the first reactor for further GVL formation.

The invention relates to a preparation method of a wide-dielectric-domain-scale honeycomb-shaped cobalt-nitrogen co-doped carbon catalyst, which comprises the following steps: 1, hydrothermal reaction: carrying out hydrothermal reaction on microalgae powder and glucose in a dilute sulfuric acid solution, filtering, washing with water, and drying to obtain a nitrogen-doped biochar precursor; 2, coordination reaction: dissolving soluble cobalt salt in ethanol, dropwise adding the bidentate ligand, stirring until the solution becomes viscous, and drying to obtain a cobalt complex; and 3, carbon thermal reaction: mixing the nitrogen-doped biochar precursor with a cobalt complex, carrying out carbon thermal reaction in a nitrogen atmosphere, washing with water, and drying to obtain the cobalt-nitrogen co-doped carbon catalyst which has obvious pores in a 2-50nm wide dielectric domain scale and is of a honeycomb structure. The catalyst provided by the invention is used for the hydro-conversion reaction of levulinic acid, and has the effects that the complete conversion of levulinic acid can be realized by reacting for 2 hours at 180 DEG C under the hydrogen pressure of 1.2 MPa, the selectivity of gamma-valerolactone reaches 100%, and the selectivity is still kept 100% after 8 cycles.

The invention relates to the technical field of chemical synthesis of medicines, and particularly discloses a production and preparation method of an erlotinib intermediate. The method comprises the following steps: taking 3, 4-dihydroxy benzaldehyde as an initial raw material, sequentially carrying out etherification, oxidation and nitration reactions to prepare 2-nitro-4, 5-bis (2-methoxyethoxy) benzoic acid, finally dissolving the 2-nitro-4, 5-bis (2-methoxyethoxy) benzoic acid, formamide, formic acid and triethylamine in gamma-valerolactone to form two material flows, and carrying out heat treatment to obtain the 2-nitro-4, 5-bis (2-methoxyethoxy) benzoic acid. And carrying out continuous cyclization reaction in a fixed bed reactor filled with a specific composite catalyst, and carrying out post-treatment to obtain the target product 6, 7-bis (2-methoxyethoxy)-4-quinazolinone. According to the method, the raw materials are easy to obtain, the reaction efficiency and the product purity are remarkably improved by optimizing the synthesis route and the reaction conditions, and a novel efficient, environment-friendly and stable method is provided for large-scale production of the erlotinib key intermediate.

The purpose of the present invention is to provide a photosensitive resin composition, a method for producing a cured film, and a method for producing a cured relief pattern, the photosensitive resin composition having excellent resolution even when a polymer having high absorbance such as a high glass transition temperature (Tg) is imparted thereto, and having reduced copper voids when in contact with copper. [Solution] A photosensitive resin composition comprising: (A) a polymer which is (A1) a soluble polyimide or (A2) a polyimide precursor; (B) a photopolymerization initiator; the solvent is N-ethyl-2-pyrrolidone; (E) a photopolymerizable unsaturated monomer; and (X) at least one substance selected from the group consisting of toluene, xylene, tetrahydrofuran, gamma-butyrolactone, and gamma-valerolactone, the content of the (X) being 1 ppm or more and 10000 ppm or less relative to the total mass of the photosensitive resin composition.

The application discloses a preparation method and application of light-colored nanoparticle lignin, and the preparation method comprises the following steps: washing and grinding peeled red hemp stalks into powder, then adding the powder into a mixed aqueous solution of glyoxylic acid and p-toluenesulfonic acid to react, the concentration of the glyoxylic acid is 4-10 wt.%, the concentration of the p-toluenesulfonic acid is 50-80 wt.%, the reaction temperature is 70-100 DEG C, and the reaction time is 30-60 min; after the reaction is completed, solid-liquid separation is performed, the filtrate is precipitated by adding water, the lignin is dialyzed, and the lignin is freeze-dried to obtain red hemp light-colored lignin; the red hemp light-colored lignin is dissolved in a gamma-valerolactone solution, dialyzed by ultrapure water, and then freeze-dried to obtain light-colored nanoparticle lignin, the obtained lignin has low condensation degree, light color and good ultraviolet absorption performance.

The invention discloses a fluoride-free transparent polyimide film based on a dynamic covalent network and a preparation method of the fluoride-free transparent polyimide film, the fluoride-free transparent polyimide film is formed by copolymerizing a diamine monomer containing a dynamic covalent bond and an alicyclic dianhydride monomer, and a molecular chain of the fluoride-free transparent polyimide film contains 5%-30% of the dynamic covalent bond, the dynamic covalent bond is an acylhydrazone bond or an imine bond; in the preparation process, a bio-based solvent gamma-valerolactone is adopted, and the high-performance film with the light transmittance larger than 90%, the Tg larger than 300 DEG C and the tensile strength larger than 120 MPa is obtained through solution polymerization, film casting and programmed heating imidization processes; according to the invention, the performance contradiction of transparency, heat resistance and recoverability is broken through, and thermal remodeling can be realized.

The invention relates to the technical field of organic chemical industry, and discloses an efficient synthesis method applied to 2-hydroxy-benzonitrile production. The method comprises the following steps: dissolving urea in gamma-valerolactone, mixing the gamma-valerolactone with methyl salicylate to form a raw material solution, introducing the raw material solution into a fixed bed reactor filled with a special catalyst, carrying out first-stage and second-stage reactions at different temperatures in sequence, and carrying out post-treatment on the reaction solution to obtain a 2-hydroxy-benzonitrile product. The catalyst is prepared by taking mesoporous silica as a carrier through amino modification, cerium-zinc composite oxide loading and histidine modification, and has high activity and stability. The method realizes continuous synthesis of 2-hydroxy-benzonitrile, has the advantages of mild process conditions, continuous and efficient reaction, high product yield and excellent purity, avoids the use of toxic raw materials in the traditional process, reduces the production cost, and is suitable for large-scale production.

This invention relates to the field of distillation apparatus technology, specifically to a modular distillation apparatus suitable for the alternating production of γ-butyrolactone and δ-valerolactone. It includes a distillation column with an opening on its side wall. A sealing door is detachably installed at the opening via bolts. A lifting cylinder is installed inside the distillation column. The lifting cylinder contains tray modules, and a lifting mechanism is installed inside the distillation column. A locking mechanism is installed on the inner wall of the distillation column. By using replaceable tray modules and packing modules within the same distillation column, and cooperating with the lifting mechanism, the lifting cylinder can be smoothly raised, lowered, and its position adjusted. The locking mechanism ensures the stability of the module installation. This eliminates the need to construct multiple distillation columns separately; alternating production of GBL and DVL can be achieved simply by switching different functional modules. This solves the problems of high cost and low equipment utilization caused by the "one product, one column" approach mentioned in the background art.

This invention discloses a method for preparing piperidine. The method uses δ-valerol derived from biomass as the initial raw material, first sequentially generating 5-hydroxyvalerate and 4-cyanobutyraldehyde, then using a core-shell structured material with an Al₂O₃ shell as a catalyst to synthesize piperidine under mild reaction conditions. The catalytic reaction involved in this invention is a low-pressure reaction, requiring less sophisticated reaction equipment and improving the economic feasibility of the reaction; the byproducts of the catalytic process are pollution-free, resulting in minimal waste and achieving green and sustainable production of piperidine.

The application provides an alcohol-based inkjet printing ink for preparing a perovskite layer, a velvet-shaped perovskite layer and a preparation method and application thereof, and the printing ink comprises an alcohol-based solvent, a first functional organic solvent, a second functional organic solvent and an organic ammonium salt; the first functional organic solvent comprises at least one of gamma-valerolactone and propylene carbonate; the second functional organic solvent comprises at least one of triethyl phosphate, ethyl acetate, N-methyl pyrrolidone, isosorbide dimethyl ether and dihydro levoglucosenone; the volume ratio of the alcohol-based solvent, the first functional organic solvent and the second functional organic solvent is (60-98):(1-20):(1-20); the boiling point of the alcohol-based solvent is lower than the boiling points of the first functional organic solvent and the second functional organic solvent, and the problems of nozzle blockage, coffee ring phenomenon, low perovskite phase purity and easy formation of defects in the content of the perovskite layer caused by the organic ammonium salt ink in the prior art are solved.

The present application relates to a kind of one-pot two-step catalytic xylose preparation gamma-pentyl lactone method, belong to biomass energy chemical technology field.The present application uses xylose as substrate, in anaerobic environment, using catalyst Hβ-30 catalyzes xylose reaction conversion into furfural, catalyst Hβ-30 catalyst is removed from reaction liquid to obtain furfural crude solution;With furfural crude solution as second reaction substrate solution, cellulose carbon modification Zr / β catalyst and isopropyl alcohol solvent are added into furfural crude solution, in anaerobic environment, catalytic furfural is efficiently converted into gamma-pentyl lactone.The present application can be directly prepared from xylose one-pot two-step method gamma-pentyl lactone, avoid the separation and purification of unstable intermediate product, with the characteristics of high degree of integration of catalytic system, gamma-pentyl lactone yield is high.