66results about How to "Reduce separation costs" patented technology

The invention relates to an aureobasidium pullulans strain for producing pullulan as well as a construction method and application of the aureobasidium pullulans strain, and belongs to the technical field of bioengineering. According to the aureobasidium pullulans strain constructed by the invention, alpha-phosphoglucose mutase PGM and uridine diphosphate glucose pyrophosphorylase UGP are continuously overexpressed, so that the yield of pullulan produced by fermentation of aureobasidium pullulans is remarkably improved, the fermentation titer of the strain is improved, the stability is improved, and the yield of pullulan produced by fermentation of aureobasidium pullulans is improved. An excellent strain is provided for preparing the pullulan by a microbial fermentation method, the separation cost in the downstream purification process of the pullulan is reduced, and an excellent strain is provided for industrial production of the pullulan.

The invention relates to the technical field of hydrogen production, in particular to equipment for preparing hydrogen from biomass, a method for preparing hydrogen from biomass and application. The equipment comprises a biomass pretreatment system and a chemical-looping hydrogen production system, wherein the biomass pretreatment system comprises a drying unit, a crushing unit and a granulating unit; the chemical-looping hydrogen production system comprises a biomass hydrogen production reduction reactor, a hydrogen purification device and a dust remover; the dust remover is connected with a regeneration storage tank and an air oxidation reactor; the air oxidation reactor is connected with the biomass hydrogen production reduction reactor; the granulating unit is connected with the biomass hydrogen production reduction reactor; a first heat exchanger is arranged between a synthesis gas outlet of the biomass hydrogen production reduction reactor and the hydrogen purification device, and a water vapor outlet of the first heat exchanger is connected with the biomass hydrogen production reduction reactor; and an oxygen-poor waste gas outlet of the air oxidation reactor is connected with the drying unit. The equipment is simple in structure, waste heat is fully utilized, energy consumption is reduced, hydrogen purity and yield are improved, and carbon dioxide is captured.

The invention belongs to the technical field of recycling of waste blended textiles, and particularly discloses a method for converting waste blended textiles into ethylene glycol and 1, 4-cyclohexanedicarboxylic acid, which is characterized in that under the action of a multifunctional solid acid catalyst and H2, the waste blended textiles are simultaneously depolymerized and converted into micromolecular chemicals, and the micromolecular chemicals are recycled. Compared with an existing method for depolymerizing and utilizing a single component in the waste blended textiles, the method has the advantages that simultaneous depolymerizing and utilizing of multiple components in the waste blended textiles are achieved, the method is few in process step, high in economic benefit, simple in actual operation and environmentally friendly, the energy consumption in the waste blended textile recycling process is reduced, and the recycling cost is reduced. And meanwhile, the side reaction and subsequent separation cost is reduced, and the process economy is improved.

The utility model discloses a solid-liquid separation device for precious metal recovery, and relates to the field of precious metal recovery, the solid-liquid separation device comprises a separation box, the back of the separation box is fixedly connected with a lifting assembly, and the tops of the two sides of the separation box are fixedly connected with a mounting rack. During use, the first motor drives the first lead screw to rotate to drive the driving plate to ascend, then the driving plate and the filter screen plate ascend, the second motor drives the first lead screw to rotate, then the second lead screw rotates to drive the scraping plate to move to scrape off solid substances on the filter screen plate, and then the solid substances are collected when the filter screen plate is cleaned. Therefore, the filter screen plate does not need to be taken down every time, time is not wasted, the working efficiency is improved, then when a dissolving solution is poured into the separation box, a buffer spring is matched with a buffer gasket A and a buffer gasket B to buffer the impact force of the dissolving solution, then the filter screen plate is protected, the filter screen plate is prevented from being damaged, and the separation cost is reduced.

A process for separating fillers from catalysts and gases in plastics in a fluidized bed catalytic pyrolysis process is described that converts waste plastics, polymers, and other waste materials to useful chemicals and fuel products, such as aromatics such as paraffins, olefins, and BTX.

The invention discloses a separation method and application of CBDO cis-trans isomers, and relates to the technical field of compound isomer separation. The separation method comprises the following steps: respectively modifying hydroxyl groups of cis-CBDO and trans-CBDO to generate polarity difference, then separating the two isomers by a solvent dissolution-crystallization method, and finally removing protection to respectively obtain the cis-CBDO isomer and the trans-CBDO isomer. Through a modification protection-separation-deprotection method, the method has the advantages that the method is simple, the separation cost is reduced, and CBDO products with different cis-trans ratios and all-trans CBDO isomers can be obtained; the cis-trans ratio of the CBDO product can be up to 39.5 / 1, and compared with the commercially available CBDO, the copolyester prepared by using the CBDO product under the same condition has higher intrinsic viscosity and glass transition temperature, and the copolyester product with a full cis form can be obtained, so that the application range of the polymer can be expanded.

The invention discloses a tandem catalysis method for improving the catalytic efficiency of preparing higher alcohol by CO2 hydrogenation, which comprises the following steps: two sections of fixed bed reactors are connected in series, the first section of reactor is filled with a catalyst for preparing olefin by CO2 hydrogenation, and the second section of reactor is sequentially filled with an olefin hydroformylation catalyst and a catalyst for preparing alcohol by aldehyde hydrogenation. According to the invention, segmented catalysis is carried out on the complex process of preparing higher alcohols through CO2 hydrogenation, and a catalyst for preparing olefins through CO2 hydrogenation, a hydroformylation catalyst and an aldehyde hydrogenation catalyst are respectively arranged in an upstream-segment reactor and a downstream-segment reactor, so that the efficiency and selectivity of preparing higher alcohols through CO2 hydrogenation are improved; through tandem catalysis, the selectivity of by-product hydrocarbons can be effectively reduced, the utilization rate of carbon is improved, the selectivity and space-time yield of higher alcohols are remarkably improved, and the separation cost of products is reduced.

The invention discloses a catalyst for low-pressure CO2 electroreduction as well as a preparation method and application thereof, and belongs to the field of catalytic materials for controlling atmospheric pollutants. The preparation method comprises the following steps: dissolving DUT-67 and cobalt salt in N, N-dimethylformamide, uniformly dispersing, carrying out a heating reaction, and drying to obtain DUT-67-Co; the preparation method comprises the following steps: dissolving DUT-67-Co and phthalonitrile in N, N-dimethylformamide, uniformly dispersing, carrying out a heating reaction, and drying to obtain CoPc-DUT-67; the preparation method comprises the following steps: dissolving CoPc-DUT-67 and p-trifluoromethyl benzoic acid in methanol, uniformly dispersing, carrying out a heating reaction, and drying to obtain CoPc-DUT-67-F. According to the invention, packaging of metal phthalocyanine active small molecules is realized, a homogeneous catalyst is diversified, and separation, circulation and regeneration of the catalyst are facilitated; the competitive hydrogen evolution reaction in the CO2 electroreduction process is reduced by building the MOF pore channel hydrophobic microenvironment, and the catalytic conversion efficiency from CO2 to CO is improved.

The present invention discloses a mud-sand separation device for water conservancy projects and a method for using the same, and belongs to the technical field of mud-sand separation. A mud-sand separation device for water conservancy projects includes a base, and also includes: a sand-stone separation cylinder, which is tiltedly arranged on the upper side of the base through a bracket, and the bottom and top of the sand-stone separation cylinder are respectively provided with a feed port and a discharge port; a separation seat, which is fixedly arranged at the bottom end of the sand-stone separation cylinder, and a silt separation cylinder for mud-water separation is arranged in the separation seat, and a plugging component for blocking the opening of the silt separation cylinder is arranged on the separation seat; a belt conveyor, which is fixedly arranged on the base, and the front end of the belt conveyor is placed on the lower side of the silt separation cylinder; and a heating shell, which is coated on the upper side of the belt conveyor; the present invention can effectively separate, process and utilize water, silt and sand and gravel, ensure the continuous operation of the separation work, reduce the workload of the staff, and improve the mud-sand separation effect and mud-sand separation efficiency.

The invention relates to a catalyst for preparing anisole through phenol methanol etherification as well as a preparation method and application of the catalyst. The catalyst takes aluminum phosphate as a carrier and is doped with zirconium oxide; on the basis of the mole number of Al, the mole ratio of P to Al is (0.05-2): 1, and the mole ratio of Zr to Al is (0.08-0.20): 1. Dropwise adding the aluminum-zirconium mixed aqueous solution into the phosphorus source aqueous solution, stirring, standing and washing to obtain a solid sample; and drying and roasting the solid sample to obtain the aluminum phosphate catalyst. Under the action of the catalyst, phenol and methanol are catalyzed to generate anisole. Compared with the prior art, the phenol conversion rate is greater than or equal to 50%, the anisole selectivity is greater than or equal to 85%, highly toxic dimethyl sulfate and a large amount of alkali are not needed, the process is green, the cost is low, separation is simple, and the method is suitable for large-scale industrial production of anisole.

Belonging to the technical field of methanol synthesis, the invention discloses a green methanol synthesis system based on new energy power generation hydrogen production and air CO2 capture, which comprises an air blower, an air CO2 capture device, an electrolysis device, a new energy power generation device, a hydrogen storage tank, a CO2 storage tank, a gas mixing compressor and a methanol synthesis device, the ionic membrane is arranged in the electrolytic tank to divide the electrolytic tank into an anode chamber and a cathode chamber, an anode and a cathode are respectively arranged, the anode and the cathode are both electrically connected with the new energy power generation device, the anode chamber is communicated with the CO2 storage tank, the cathode chamber is communicated with the hydrogen storage tank, the anode chamber and the cathode chamber are both communicated with the air capture CO2 device, and the air capture CO2 device is communicated with the hydrogen storage tank. The hydrogen storage tank and the CO2 storage tank are both communicated with the gas mixing compressor, and the gas mixing compressor is communicated with the methanol synthesis device. An organic matter solution and carbonate are electrolyzed through the anode chamber, only CO2 is generated, the oxygen separation cost is reduced, and the air carbon capture cost is further reduced by improving the CO2 adsorption rate.

The present invention relates to a method for preparing 3-methylphenethyl ether, the method comprising the following steps: under the action of a catalyst, catalyzing m-methylphenol and ethanol to generate 3-methylphenethyl ether, wherein the catalyst is a silver-tin-zinc composite nitrogen silicon compound. The yield of the present invention is as high as more than 90%, and can be continuously and stably operated for 3000h. The process has high carbon atom utilization rate, adopts a continuous fixed bed process, has high reaction efficiency, does not need to use other solvents, and has low separation cost. And ethanol cost is low, and the overall process cost is greatly reduced. In addition, the reaction steps are simple, synthesis is achieved in one step, has good reactivity and selectivity, can achieve long-term stable operation, and is an ideal process for industrial production.

The invention discloses a phosphorescent iridium complex with an inherent chiral structure, a luminescent material, an organic electroluminescent device and electronic equipment, and relates to the technical field of organic photoelectric materials, the phosphorescent iridium complex has a delta-Ir (LA) (LB) 2 or lambda-Ir (LA) (LB) 2 structure, and LA is a chiral auxiliary ligand and has at least one chiral center. The corresponding iridium complex at least has two chiral centers, not only has the circularly polarized luminescence characteristic, but also can be separated through column chromatography in the preparation process, so that the separation cost and the dependence on equipment are reduced; lB is a main ligand, is a rigid ligand with a large conjugate area, can effectively inhibit structural vibration, realizes a narrow phosphorescence emission spectrum, and has high color purity.

The invention discloses an extracting agent for separating and recycling metal elements in battery feed liquid, an extracting method and application of the extracting agent and the extracting method, and belongs to the technical field of waste lithium battery recycling. The method is simple and easy to operate, is not influenced by impurity metal ions such as calcium and magnesium, and can improve the extraction capacity of a system to nickel, cobalt and manganese and inhibit the extraction capacity to lithium, calcium and magnesium by optimizing the proportion, concentration and side chain structure of the composite extraction agent, so that the separation coefficient of the system to nickel, cobalt and manganese and lithium, calcium and magnesium is improved, and efficient separation is realized. According to the method, the technological process is short, operation is easy, the separation cost for recycling nickel, cobalt and manganese and the extraction and purification cost for impurity metal ions are reduced, the purity of the recycled nickel-cobalt-manganese product exceeds 99.85%, and the recycling rate exceeds 98.5%.

The invention relates to the technical field of separation and purification, and discloses a method for separating and purifying gulonic acid in fermentation liquor by coupling salting-out extraction with crystallization. According to the method, fermentation liquor is subjected to salting-out extraction treatment through a salting-out system composed of organic solvents including ethanol, isopropanol, tertiary butanol, n-butanol and acetone and inorganic salts including ammonium sulfate, sodium chloride, sodium carbonate and sodium bicarbonate, gulonic acid can be effectively enriched in a lower phase, thalli, most pigments, impure protein and other impurities are removed, and gulonic acid is easy to separate and purify. According to the method, the gulonic acid in the fermentation liquor is separated and purified through the salting-out extraction coupling crystallization technology, treatment such as centrifugation and membrane filtration does not need to be conducted on the gulonic acid fermentation liquor, the separation cost is reduced, meanwhile, the separation process is mild, operation is easy, and industrial production is facilitated.

The invention relates to the technical field of microorganisms, in particular to a multi-drug-resistant salmonella virulent phage and application thereof. The phage is named as vB-Sal-TmvP009 and is sent to the general microbiological center of the China Committee for Culture Collection of Microorganisms, the preservation number is CGMCC No.46177, and the preservation date is September 2, 2024. The bacteriophage provided by the invention is separated from sewage of a livestock farm, belongs to a tailed virus, and is expressed by genomics, belongs to Jerseyvirus, has no virulence gene and no drug-resistant gene, and is high in safety. The biological characteristic result of the bacteriophage shows that at least 10 salmonella serotypes can be split, the temperature (-20 DEG C to 60 DEG C) stability and the acid-base (pH = 3-12) stability of the bacteriophage are good, the average splitting quantity reaches 9.77 * 10 < 4 >, and the bacteriophage can be massively proliferated in a short time and can be used for preventing and controlling drug-resistant salmonella.

The invention discloses an organic-solvent-free preparation method of diacetylmonoxime with 100% butanone conversion rate, and belongs to the technical field of organic synthesis.Under the condition that no organic solvent exists, the instantaneous molar ratio of raw materials is controlled through a peristaltic pump, hydrogen peroxide and ammonia gas are introduced into the bottom of a reaction kettle, and the butanone conversion rate and the diacetylmonoxime selectivity can both reach 100%.

The application provides a heat recovery method and device of a pyrolysis rotary furnace, and the heat recovery method comprises pyrolysis gas flow condensation: high-temperature pyrolysis gas flows out from a pyrolysis furnace, enters a high-temperature condenser after slag removal, is cooled by a light working medium, high-boiling-point pyrolysis oil components are condensed out, are collected and discharged into a high-boiling-point oil tank for storage, and meanwhile, medium-temperature pyrolysis gas is obtained; working medium circulation: the light working medium absorbs the heat of the high-temperature pyrolysis gas in the high-temperature condenser, evaporates water vapor and becomes a concentrated working medium which is discharged from the lower part of the condenser and returned to a medium absorber, during which, the concentrated and light liquid heat exchanger is used to transfer the heat of the working medium to the light working medium of the high-temperature condenser; the application of the mature technology is a derivative application of the absorption heat pump technology, the working principle is simple, the system route is safe, and the operation is stable.

The invention discloses a method for extracting rosmarinic acid from ragwort fruit, which is characterized in that the method comprises the following steps: extraction: ragwort fruit is crushed and sieved, and acid water is added for ultrasonic extraction; extraction: the extract is dispersed in warm water and then extracted with an organic solvent; enrichment: the extract is analyzed in a macroporous resin chromatography column with ethanol of appropriate concentration, and the analyzed solution is collected. Crystallization: the analyzed solution is concentrated to one tenth of the volume under reduced pressure, cooled and allowed to stand, and the precipitate is collected. Purification: the precipitate is dissolved and filtered with acid water again, and the filtrate is repeatedly extracted and crystallized to obtain rosmarinic acid crystals; drying: the crystals are dried to obtain pure rosmarinic acid. The method has a simple process flow, low production cost, and the organic solvent can be recycled, and the obtained product has high purity and good quality.

The present invention provides a phosphine-containing compound and a preparation method thereof and an application thereof as a ligand of an ethylene oligomerization catalyst composition. The phosphine-containing compound has a structure as shown in Formula I: wherein R1, R2, and R3 are independently selected from hydrogen, a C1-C20 chain alkyl group, a C3-C20 cycloalkyl group, a heterocycloalkyl group, a substituted or unsubstituted C6-C20 aryl group, a halogen, an alkoxy group, a phenoloxy group, an amine group, and a phosphine-based substituent; and R1, R2, and R3 are the same or different. When used as an ethylene oligomerization catalyst, it can selectively prepare 1-hexene and 1-octene, and also has excellent total selectivity of C8 and C6.

The invention discloses a magnetic easy-to-separate Fe3O4-SnO-SiO2 composite catalyst and preparation and application thereof.The composite catalyst is of a core-middle layer-shell layer three-layer core-shell structure, a shell comprises a coating layer, the core comprises a magnetic core, the middle layer comprises an active layer, and the active layer is evenly adsorbed to the surface of the magnetic core; the magnetic core is Fe3O4; the active layer is any one or more than two of SnO, ZrO2 and TiO2; the coating layer is made of SiO2 and wraps the outer side of the active layer. The problems that efficient catalysis, convenient magnetic separation, long-acting circulation stability and precise regulation and control of a product structure cannot be synchronously solved in the prior art are solved. The conversion rate of the catalyst for catalytic synthesis of trimethylolpropane trioleate reaches 94.32%; the friction coefficient of the product is stabilized at 0.09-0.10, the wear volume is reduced by more than 68%, and the magnetic separation recovery rate is 98%.

The application provides a preparation method of a catalyst for preparing low-carbon olefins from synthesis gas, which comprises the following steps: mixing a soluble salt solution of a metal component with phosphoric acid, performing a precipitation reaction, and drying the obtained slurry; calcining the dried product at 300-500 DEG C for 1-24h to obtain solid grains with a diameter of 0.5-7nm; immersing the solid grains in a soluble salt solution of an auxiliary agent, reacting for 1-3h, then evaporating the reaction system, and transferring the obtained solid product to a calcination furnace at 350-650 DEG C for 1-8h to obtain a catalyst for preparing olefins from synthesis gas; the preparation method uses phosphoric acid as an essential auxiliary agent, effectively reduces the amount of the auxiliary agent, and saves the preparation cost of the catalyst; the stability of the phosphoric acid salt is high, the catalyst is not deactivated in a long operation, and the replacement cost of the catalyst is saved; the catalyst is used for preparing olefins, the content of C5+ products can be reduced by 50%-90%, and the proportion of C2-C4 olefins can be increased to 75%-88%. The economic efficiency of the product is improved, and the separation cost is reduced.

The invention discloses a method for separating and purifying ganoderma triterpenes from ganoderma lucidum sporocarp, and belongs to the technical field of natural product extraction. In order to solve the problems of high energy consumption, high cost, high environmental protection pressure, low ganoderma triterpene extraction rate, low ganoderma triterpene purity and the like in the prior art, the invention provides a method for separating and purifying ganoderma triterpene from ganoderma sporocarp. Microfiltration, ultrafiltration, nanofiltration, macroporous adsorption resin adsorption separation, concentration, precipitation and drying are performed to obtain the triterpenoid extract, the content of ganoderma triterpenoid is larger than or equal to 70%, and the yield is larger than or equal to 5.50%. According to the method, the extraction process flow is simplified, the product yield is greatly improved, and good separation efficiency is achieved.

This invention relates to the field of catalysis, and discloses a bilayer gradient acidic core-shell molecular sieve catalyst, its preparation method, and its applications. The bilayer gradient acidic core-shell molecular sieve catalyst comprises a ZSM-11 core layer and a BEA shell layer covering its surface; the acid strength of the ZSM-11 core layer is 0.40–1.20 mmol / g, and its average thickness is 0.5–3 μm; the acid strength of the BEA shell layer is 0.10–0.40 mmol / g, and its average thickness is 20–300 nm. This catalyst possesses a bilayer gradient acidic core-shell structure. When applied to the catalytic synthesis of tert-butylamine from isobutylene or its precursors (alcohols / ethers), it can improve single-pass conversion while maintaining high selectivity, and significantly reduce the carbon deposition rate and bed pressure drop growth, achieving long-term stable operation.

The invention discloses a monatomic Rh polymer catalyst as well as a preparation method and application thereof, and relates to the technical field of catalyst preparation. The catalyst comprises an active component and a carrier, the active component is rhodium metal, the carrier is a polymer containing a phosphine ligand, and the catalyst is of a microporous structure. The monatomic Rh polymer catalyst can realize efficient conversion of common olefin compounds under relatively mild conditions, has high activity and high aldehyde forming selectivity in a hydroformylation reaction, can be stably circulated for more than 5 times, and effectively solves the problems of catalyst separation and recovery. In a hydrosilylation reaction, a terminal silane product is selectively generated, and the method is an effective method for preparing an organosilicon reagent. The invention solves the problem of poor stability and activity of the existing heterogeneous catalyst.

The invention discloses preparation and application of a plant extract for preventing and treating non-alcoholic steatohepatitis. The preparation method comprises the following steps: extracting and concentrating boxthorn leaves to serve as a loading solution; and separating and purifying the loading solution by using the synthesized macroporous resin to obtain the boxthorn leaf total flavone extract, the total flavone content is greater than 60%, and the yield is greater than 90%. The method for preparing the extract for preventing and treating the non-alcoholic steatohepatitis is green and environment-friendly, the process route is simple, and animal experiments prove that the obtained extract has a good drug effect on the non-alcoholic steatohepatitis and can be used for developing health-care foods, functional foods and new drugs.

The present invention provides a gas-liquid separator and a vehicle having the same, the gas-liquid separator comprising: a shell having a separation chamber; a drive assembly connected to the shell, the drive assembly comprising a drive shaft, part of the drive shaft being arranged in the separation chamber; a gas-liquid separation assembly, the gas-liquid separation assembly having a plurality of blades, the first side of each blade being rotatably connected to the shell, the second side of each blade being rotatably connected to the drive shaft, the rotation of the drive shaft can drive the blade to rotate around the rotation axis of the first side of the blade by a preset angle; wherein the drive shaft has a first working position for driving each blade to rotate by a first angle so that the outer surface of each blade is surrounded by a cylindrical surface, and a second working position for driving each blade to rotate by a second angle so that each blade is arranged at a preset distance. The technical solution of the present application is adopted to effectively solve the problem of low separation efficiency of the gas-liquid separator in the prior art.

The present application discloses a gas-liquid separation device and a working method thereof, the gas-liquid separation device comprising a shell body, a separation cylinder and at least one floating pressing assembly, the shell body forming a first interface and a second interface, a peripheral wall of a part of the separation cylinder and an inner wall of the shell body forming a flow channel, the separation cylinder having a separation space, the separation cylinder forming a plurality of first openings connecting the flow channel and the separation space, the separation cylinder forming a flow channel, the separation cylinder forming a plurality of second openings connecting the flow channel and the separation space, the material gas enters from any one of the first interface and the second interface in the axial direction of the shell body and flows through the separation cylinder in the radial direction of the shell body and finally flows out from the other one, the floating pressing assembly applies floating pressure to the filler in the separation space, compared with the existing axial flow method, it realizes dispersion of the material gas while ensuring uniform gas-liquid separation time of the material gas, and adapts to the volume change of the filler, improves the gas-liquid separation effect, and prevents the filler from loosening and friction powdering.

The application provides a method for isolating branched sphingosine from Bacteroides fragilis, products and applications. The method comprises the following steps: (1) using an organic solvent as an extraction solvent to extract intracellular metabolites and obtain a total extract; (2) using an organic solvent as an extractant to extract the total extract to obtain an extract; (3) using a reverse phase chromatographic column to perform liquid chromatography separation on the extract to obtain the branched sphingosine; wherein the liquid chromatography separation conditions comprise elution with an acetonitrile / water solution containing formic acid as an elution system. The application can obtain a plurality of different high-purity active branched sphingosines from the fermentation broth of Bacteroides fragilis through simple treatment, and the method is simple to operate and does not require complex equipment and technology.

The invention belongs to the technical field of biomass hydrothermal liquefaction post-treatment, and particularly relates to a novel biomass hydrothermal liquefaction reaction post-treatment method which comprises the following steps: performing gas-liquid separation on a mixture after a biomass hydrothermal liquefaction reaction to obtain a gas-phase product and a primary liquid-phase product; the solid content is gt; carrying out solid-liquid pre-separation on 15% of the primary liquid-phase product to obtain a pre-separated solid-phase product and a secondary liquid-phase product of which the solid content is less than or equal to 5%; separating a mixture of the primary liquid-phase product with the solid content being less than or equal to 15% and the secondary liquid-phase product with the solid content being less than or equal to 5% through filtering equipment to obtain a filtered solid-phase product and a liquid-phase product with the solid content being less than or equal to 1%; extracting and separating a filtered solid-phase product; extracting the residual solid phase in the filtered liquid phase product with the solid content of less than or equal to 1% by using an organic solvent to obtain an organic phase and a water phase product with the solid content of less than or equal to 1%; and separating the organic phase to purify the bio-oil. The biomass hydrothermal liquefaction reaction post-treatment efficiency and the oil product separation effect are improved, and the separation cost is reduced.