66results about How to "High product yield" patented technology

The invention discloses a waste plastic pyrolysis-catalysis system based on electromagnetic induction heating and a catalytic reforming method, and relates to the technical field of plastic pyrolysis. The problems that in the existing plastic pyrolysis-catalysis process, the yield and quality of CNTs and H2 are affected by factors such as non-uniform heating, catalyst deactivation and difficult product separation exist are solved. The system comprises a gas inlet device, a waste plastic pyrolysis device, a waste plastic continuous feeding device, a waste plastic catalytic reforming device and a gas collecting device, the gas inlet device is used for providing argon gas flow for the waste plastic pyrolysis device through a gas pipe; the waste plastic continuous feeding device is used for feeding waste plastic into the waste plastic pyrolysis device for heating and cracking; pyrolysis products enter a waste plastic catalytic reforming device after passing through a waste plastic pyrolysis device; according to the waste plastic catalytic reforming device, the temperature is regulated and controlled through the electromagnetic induction heating module, and the catalytic reforming process is optimized; and gas products after catalytic reforming are collected by a gas collecting device. The method is applied to the field of plastic recovery.

The invention discloses an alpha, omega-diiodo perfluoroalkane derivative, an alpha, omega-diiodo ethyl perfluoroalkane derivative as well as a preparation method and application of the alpha, omega-diiodo perfluoroalkane derivative and the alpha, omega-diiodo ethyl perfluoroalkane derivative. According to the method, alpha, omega-diiodo perfluoroalkane is taken as a raw material, and the alpha, omega-diiodo perfluoroalkane and ethylene are subjected to free radical addition reaction under the action of an initiator and a solvent to prepare the alpha, omega-diiodo ethyl perfluoroalkane. The alpha, omega-diiodoethyl perfluoroalkane and alkali are subjected to a one-molecule and / or two-molecule hydrogen iodide hydride elimination reaction, and alpha, omega-iodoethyl vinyl perfluoroalkane and / or alpha, omega-divinyl perfluoroalkane are / is generated. The method is simple and convenient to operate, the raw material utilization rate and the target product yield are high, the preparation cost is effectively reduced, and the industrial production requirement is met. The alpha, omega-diiodo perfluoroalkane derivative or alpha, omega-diiodo ethyl perfluoroalkane derivative prepared by the method disclosed by the invention can be used as a vulcanization point monomer for preparing peroxide vulcanized fluororubber, and compared with common rubber, the rubber has more excellent compression deformation performance, strength and medium resistance and has a wide application prospect.

The invention discloses a double-station motor stator internal winding machine capable of automatically feeding and discharging, and belongs to the technical field of motor winding machine equipment. Comprising a machine box, an automatic conveying mechanism, a transfer storage mechanism, a winding seat mechanism, a wire clamping and shearing mechanism and a three-axis mechanism, the automatic conveying mechanism, the transfer storage mechanism, the winding seat mechanism, the wire clamping and shearing mechanism and the three-axis mechanism are sequentially arranged above the machine box, a pay-off rack mechanism is further fixedly connected to the side, close to the three-axis mechanism, of the machine box, and a first carrying mechanism and a second carrying mechanism are arranged above the automatic conveying mechanism; the three-axis mechanism is connected with a winding mechanism; and an aluminum profile frame is also arranged above the case. According to the double-station motor stator inner winding machine with the automatic feeding and discharging functions, automatic winding, automatic feeding and discharging and automatic wire clamping and shearing are achieved through all the mechanisms together, manpower is reduced, the working efficiency and the product yield are effectively improved, and stator coil products are simply, efficiently and stably wound out.

The invention relates to the technical field of solar cells, in particular to a laser cutting method for a flexible cell module, which comprises the following steps of: bonding glass and a cell piece together through an adhesive layer; cutting the glass by using a first laser, and synchronously cutting the battery piece by using a second laser; a laser beam emitted by the first laser device and a laser beam emitted by the second laser device are configured to be coaxially focused, so that a first cutting path formed by cutting the glass by the first laser device is aligned with a second cutting path formed by cutting the battery piece by the second laser device; the laser emitted by the first laser forms a plurality of first laser cutting points distributed at intervals on the glass, and the laser emitted by the second laser forms a plurality of second laser cutting points distributed continuously on the battery piece. According to the method, the cutting lines of the glass and the battery piece can be accurately aligned, the subsequent piece cracking and expanding operation is facilitated, the better piece cracking effect is achieved, the production efficiency and the product yield are greatly improved, and the process is simple and easy to operate.

The invention discloses a device and a process for continuously preparing alpha-phase silicon nitride by a precursor method, and relates to the technical field of preparation of alpha-phase silicon nitride. In the process provided by the invention, the raw material silicon tetrachloride directly reacts with liquid ammonia in the reactor in a vaporific form under the action of high-purity nitrogen through an atomizer, and meanwhile, the by-product ammonium chloride solid generated by the reaction can be ensured to be completely dissolved in the liquid ammonia through the reaction temperature and the reaction pressure and by limiting the feed flow ratio of the raw material silicon tetrachloride to the liquid ammonia; the content of ammonium chloride impurities in generated solid material precursor silicon imine is reduced, and the impurity decomposition amount during subsequent calcination is reduced while the product purity is improved.

The invention relates to the technical field of combustors, in particular to an energy-saving spiral-flow type all-directional spraying combustor for a decomposing furnace, which comprises a furnace body, an installation and maintenance mechanism, an ignition mechanism and a rapid cut-off mechanism, the middle upper part of the furnace body is connected with a second pipeline through the installation and maintenance mechanism, and the inner wall of the bottom end of the first pipeline is fixedly connected with a flow dividing fan; first flow dividing openings are evenly formed in the bottom end of the first pipeline, and flow dividing plates are evenly and fixedly connected between the first pipeline and the third pipeline. According to the device, a user can conveniently conduct overhaul and maintenance work, air or fuel can be rapidly cut off, the use safety of the device can be improved, meanwhile, it can be guaranteed that the fuel is sprayed and combusted in all directions without dead corners, local high temperature in the furnace body is avoided, the fuel effect and the product yield can be improved, and the production cost is reduced. And meanwhile, the fuel consumption can be effectively reduced, so that the effects of saving energy, reducing consumption, reducing cost and improving efficiency are achieved.

The utility model provides a crystallization filtering device for pesticide production, which belongs to the technical field of pesticide production equipment and comprises a crystallization tank body and a separation box body, and a filter screen plate is arranged in the separation box body; the crystallization tank body is provided with a heat exchange mechanism, and the heat exchange mechanism comprises a jacket and a heat exchange cylinder arranged in the crystallization tank body; the heat exchange cylinder and the crystallization tank body are coaxially arranged; the crystallization tank body is further provided with a stirring and scraping mechanism, the stirring and scraping mechanism comprises a motor, and the output end of the motor is connected with the rotating shaft; the rotating shaft penetrates through the heat exchange cylinder and is rotationally and hermetically connected with the heat exchange cylinder; a scraping assembly is arranged on the rotating shaft below the heat exchange cylinder and comprises two positioning rods, and the two positioning rods are connected with the rotating shaft through connecting rods; a scraping plate is arranged on each positioning rod and is respectively propped against the heat exchange cylinder and the crystallization tank body. The device integrates crystallization and filtration, so that the cooling efficiency and the crystallization efficiency of the device are improved, the cooling and stirring effects are considered, and crystals are not left and are easy to discharge.

The invention provides an ultra-low carbon butyraldehyde synthesis device and a synthesis method thereof, the device comprises an enhanced reaction tower, an enhanced unit is arranged at the bottom of the enhanced reaction tower, and a grating is arranged above the enhanced unit; a mixed gas feed port and a propylene feed port are formed in the bottom of the enhanced reaction tower, a discharge port and a reflux pipeline are further arranged on the tower side of the enhanced reaction tower, and a circulating pump is arranged on the reflux pipeline; a catalyst recovery pipeline is arranged on the outer side of the enhanced reaction tower, the catalyst recovery pipeline is connected with the enhanced reaction tower through the discharge port, and the catalyst recovery pipeline comprises a heat exchanger, a sedimentation tank and a gas washing tower which are connected in sequence. According to the butyraldehyde synthesis device disclosed by the invention, the reaction efficiency and the product yield in butyraldehyde synthesis are improved mainly in a manner of combining the strengthening unit and the catalyst recovery pipeline, so that the catalyst recovery rate is higher while the reaction is more sufficient and thorough, and the energy consumption in catalyst recovery is greatly reduced.

The utility model discloses a device with a flow guide wire bearing ring sheet and flow guide wires, which comprises a secondary air flow guide ring, the secondary air flow guide ring comprises a flow guide wire bearing ring sheet for bearing a plurality of flow guide wires and a plurality of flow guide wires, the flow guide wire bearing ring sheet is a sheet-shaped ring and has an inner diameter and an outer diameter, and the flow guide wires are arranged in the flow guide wire bearing ring sheet. And the flow guide wires are used for forming a secondary air flow channel. The utility model provides a simple, convenient, economical and feasible solution for simultaneously realizing high-recovery-rate collection and small-particle removal of powder products.

The invention discloses a preparation process and device of conductive carbon black, and the preparation process comprises the following steps: providing a high-temperature composite airflow which comprises a plasma jet flow, a natural gas rotational flow and an air rotational flow from inside to outside; spraying the high-temperature composite gas flow into a reaction area, radially spraying preheated raw oil into the center of the reaction area, and converging the high-temperature composite gas flow and the preheated raw oil to generate a high-temperature cracking reaction to obtain high-temperature flue gas; and carrying out quenching separation and tail gas circulation on the high-temperature flue gas to obtain the conductive carbon black. The method for producing the high-end conductive carbon black for the lithium battery is based on a traditional oil furnace method and combined with a plasma technology, and continuous and stable production of the high-end conductive carbon black for the lithium battery in a plasma oil furnace system is achieved.

The utility model discloses a kind of N, N-diisopropyl ethylamine neutralization distillation device, it is related to neutralization distillation technical field, the N, N-diisopropyl ethylamine neutralization distillation device, including neutralization reaction kettle, stirring mechanism and lye distribution mechanism are equipped in neutralization reaction kettle, lye distribution mechanism is installed in the upper portion of neutralization reaction kettle, it is arranged horizontally annularly, the lower end of lye distribution mechanism is fixedly connected with the upper end of stirring mechanism, and lye distribution mechanism is rotated simultaneously when driving stirring mechanism rotation, it is even sprayed into reaction liquid phase area in circumferential direction multiple points to alkali liquor, the efficient dispersion and mixing of alkali liquor are realized.The utility model is rotated by the synergistic effect of multiple point injection lye distribution mechanism and micro rectifier structure, realize the spatial uniform distribution and rapid mixing of alkali liquor in reaction system, effectively avoid local over-alkali, improve the uniformity, stability and product yield of neutralization reaction.

The present invention belongs to the field of papermaking reconstituted tobacco leaves, and specifically relates to a method for swelling tobacco stems, comprising: washing raw tobacco stems, conveying the washed tobacco stems through a screw conveyor, and the temperature in the screw conveyor is 60°C to 80°C and the relative humidity is 65% to 90%; steaming the obtained tobacco stems through a spiral stem steamer, the temperature of the steamed stems is 70°C to 120°C, and the time is 5-30 seconds; steaming the obtained tobacco stems through a tunnel-type stem steamer, the temperature of the steamed stems is 90°C to 120°C, and the time is 5-30 seconds; soaking the obtained tobacco stems in water at 60°C to 70°C, and separating the tobacco stems. The present invention also relates to a method for preparing reconstituted tobacco leaves, reconstituted tobacco leaves and applications, and tobacco products. The method of the present invention improves the swelling effect of tobacco stems, reduces the content of hot water solubles in substrates, and improves the tobacco stem extraction rate, substrate absorbency, product yield and sensory quality.

This invention discloses a method for preparing pharmaceutical-grade hydrogenated palm oil glyceride. The steps are as follows: stearic acid, palmitic acid, and glycerol are melted, a catalyst is added, vacuum is applied, and the mixture is heated to react; the temperature is lowered, pharmaceutical-grade activated clay is added, and the mixture is stirred; the material is transferred to a pressure vessel; the outlet of the pressure vessel is opened, and the mixture is filtered to obtain crude hydrogenated palm oil glyceride, which is then fed into the material storage tank of a three-stage molecular distillation apparatus; the process parameters of the three-stage molecular distillation apparatus are set at a temperature of 160℃~250℃ and a pressure ≤30Pa, and the crude hydrogenated palm oil glyceride is forced into the cavity of the three-stage molecular distillation apparatus through a vacuum feeder, the feed flow rate is controlled, and the collected heavy component, pure hydrogenated palm oil glyceride, is transported through a pipeline to a rotary drum condenser crystallizer and slicing machine to obtain pharmaceutical-grade hydrogenated palm oil glyceride. This invention is simple to operate, uses readily available raw materials, has a high production yield, is environmentally friendly and pollution-free, and produces a high-purity product that meets pharmaceutical requirements.

The invention relates to a preparation method of an isomaltulose crystal. The preparation method of the isomaltulose crystal comprises the following steps: (1) stirring and mixing a sucrose solution and sucrose isomerase; (2) adding an isomaltulose seed crystal, feeding cane sugar, and keeping stirring in the whole process; and (3) performing centrifugal separation to obtain isomaltulose crystals. According to the method, sucrose isomerism is carried out by adopting sucrose isomerase to obtain isomaltulose, isomaltulose crystal seeds are added in the conversion process, meanwhile, the sucrose is fed, the conversion and crystallization processes are carried out at the same time, isomaltulose gradually generated through conversion grows on the crystal seeds at the same time, and the obtained crystals are regular in crystal form, high in purity and uniform in particle size.

The invention belongs to the technical field of synthesis of organic compounds, and provides a catalyst for synthesizing photosensitive diamine compounds. The catalyst is prepared by taking zirconium oxychloride, palladium chloride, potassium hydroxide and metal sodium as raw materials through continuous reaction, has excellent catalytic activity and small pollution, and can be recycled after the reaction is finished, so that the production cost is greatly saved.

The utility model provides an automatic forming device. The automatic forming device comprises a forming machine; the feeding mechanism is used for separating the first material from the second material; the implanting mechanism is used for implanting the separated first material into the forming machine so that the forming machine can machine the first material; and the material taking mechanism is used for clamping and taking out the machined and formed first material from the forming machine. According to the automatic forming device, automatic forming is achieved, the automation degree is high, the labor cost is saved, potential safety hazards are reduced, the production efficiency and the product yield are greatly improved, and the quality of injection molding products is stable.

The invention provides a preparation method of furosemide, which comprises the following specific steps: (1) adding 2-amino-4-chlorobenzoic acid and 2-chloromethyl furan into a deep eutectic solvent, and carrying out microwave heating reaction to obtain a reaction solution; and (2) sequentially adding chlorosulfonic acid and thionyl chloride into the reaction liquid to react, adding ammonia water, and then performing supercritical CO2 fluid extraction to obtain furosemide. The synthetic method of the furosemide is simple, efficient and low in energy consumption, unnecessary side reactions can be avoided, extra impurities are not generated, post-treatment mother liquor does not exist, the synthesized furosemide is high in yield and purity, and the synthetic method is suitable for large-scale actual production. According to the method, the deep eutectic solvent is selected as a novel solvent, and compared with a single solvent, the deep eutectic solvent can improve the reaction rate and the product yield and can reduce environmental pollution.

The utility model provides a kind of pyrolysis furnace with material uniform distribution, it is related to pyrolysis furnace technical field, including bottom plate, the top of bottom plate is provided pyrolysis furnace body, the top of pyrolysis furnace body is fixedly connected with multiple feed pipes, the top of bottom plate is fixedly installed with two slide rails, the outer surface wall between two slide rails is movably sleeved with slide plate, the top of slide plate is fixedly connected with two fixed frame, the outer surface wall between two fixed frame is fixedly connected with conveying pipe.In the utility model, through the interaction of each component of the device, the uniform distribution of materials in the pyrolysis furnace is realized, combined with the self-rotating mixing function of the pyrolysis furnace, the material mixing efficiency is significantly improved, the initial material accumulation problem is effectively overcome, and the heating process is uniform and efficient. This unloading mode not only improves the consistency of pyrolysis reaction and product yield, but also greatly reduces the coking risk caused by local overheating.

This invention relates to the field of automotive air conditioning manufacturing technology, and discloses an automotive air conditioning pipe crimping equipment, comprising a feeding device, a processing device, and a unloading device. The processing device includes end leveling, upsetting, radial extrusion, and deburring units, as well as a three-axis transfer claw. The unloading device integrates unloading and visual inspection units. The equipment achieves multi-process automatic flow of pipe fittings through the three-axis transfer claw, sequentially completing pipe end leveling, upsetting, radial extrusion forming, and deburring, ensuring processing coaxiality, avoiding pipe eccentricity and cracking, and improving pipe end forming accuracy and sealing performance. Simultaneously, online quality inspection through visual inspection during the unloading stage automatically identifies defective products. The entire machine integrates feeding, multi-process forming and finishing, online inspection, and automatic unloading, achieving a high degree of automation, reducing labor intensity, and improving production efficiency and product yield.

The application discloses a kind of integrated flow process of continuous high-frequency welding, it is related to high-frequency welding field.The equipment of the present application adopts integrated rack structure, effectively suppresses vibration, guarantees running stability;High-frequency welding equipment includes three welding stations and two discharging stations, discharging station is located in the middle of welding station, forms discharging and welding station interval arrangement, control mechanism, equipment main base.High-frequency welding equipment carries welding program storage function and automatic current control system, can store, retrieve multiple groups of welding process parameters, and according to workpiece type, welding position intelligent adaptation welding current.The present application solves the problems of low production efficiency, single equipment action form, high labor cost, poor flexibility of station control, complex multi-process switching, large equipment vibration, complex parameter debugging, weak welding energy adaptability and other problems of traditional equipment, with high production efficiency, stable operation, high positioning accuracy, simple operation, low labor and time cost, strong process versatility and other characteristics.

The utility model discloses a one-step molded Type-C connector female seat, which comprises a shell, an injection molding body is fixedly arranged in the shell, an upper row of terminals, a middle clamping plate and a lower row of terminals are integrally injection-molded on the injection molding body, the injection molding body comprises a base and a lingual plate which are connected, upper contact parts of the upper row of terminals are embedded in the upper surface of the lingual plate, upper connecting parts of the upper row of terminals are embedded in the base, and lower contact parts of the lower row of terminals are embedded in the lower surface of the lingual plate. The upper welding part extends out of one end, far away from the tongue plate, of the base, the lower contact part of the lower row of terminals is embedded in the lower surface of the tongue plate, the lower connecting part is embedded in the base, the lower welding part extends out of one end, far away from the tongue plate, of the base, the upper contact part and the lower contact part are vertically arranged side by side, and the upper connecting part and the lower connecting part are transversely arranged in a staggered manner; and the upper welding part and the lower welding part are vertically arranged side by side. According to the Type-C connector female seat which is formed at one time, the upper row of terminals, the lower row of terminals and the middle clamping plate are integrally formed through injection molding, the manufacturing process is simplified, and the production efficiency and the product yield are improved.

The invention belongs to the field of preparation of material intermediates, and particularly relates to a preparation method of an aromatic ketone derivative. The aromatic ketone derivative is prepared from raw materials through a ring-closing reaction, a ring-opening reaction, a ring-closing reaction and a halogen substitution reaction in sequence. According to the method, reaction conditions and catalyst selection in each step are low in cost and safe, side reactions are inhibited, and meanwhile it is ensured that the most effective catalyst can be utilized in the synthesis process so as to improve the reaction efficiency and the product yield. The reaction temperature, time and solvent selection in each step are easy to realize, and the stability and safety of the reaction process are ensured.

The invention discloses a production method of mixed alcohol amine without rectification and ammonia recovery. The production method specifically comprises the following steps: S1, a reaction stage of ethylene oxide and ammonia water; s2, a further reaction stage with epoxypropane; the invention relates to the technical field of chemical synthesis. According to the production method of the mixed alcohol amine without rectification and ammonia recovery, a method for producing ethanolamine and isopropanolamine without distillation and free ammonia recovery is adopted, the links of distillation and free amine recovery are omitted, the cost is greatly saved, the method is simple and convenient, a water absorption molecular sieve is used as a catalyst, and the production cost is greatly reduced. According to the method, the catalytic water consumption is greatly reduced, so that the energy consumption is reduced, liquid ammonia is directly used as a raw material, the material cost and the operation cost are reduced, meanwhile, the reaction rate is increased, the generation of impurities is reduced, the decomposition of the product is avoided, the purity of isopropanolamine is increased (99% or above), and the method is suitable for large-scale production and has a wide application prospect. And the production process flow is simplified.

The utility model relates to the technical field of plastic product production, concretely to a plastic granule mixing device for plastic product production, including the back -shaped guide rail, both sides of back -shaped guide rail bottom are fixedly installed with support frame, the symmetrical distribution movable seat of sliding installation has in back -shaped guide rail, two movable seat between fixed mounting have the agitator jar, the inside of agitator jar is provided with stirring mechanism, the one side fixedly inserted installation of agitator jar top portion has the feed pipe. This plastic granule mixing device for plastic product production cooperates and uses back -shaped guide rail, support frame, movable seat, agitator jar, first servo motor, feed pipe, screening box, discharge pipe, stirring shaft, stirring roller and filter screen board, sets up filter screen board in screening box, can select the plastic granule of entering agitator jar, removes the plastic of impurity and too big particle, guarantees the quality of mixing, improves production efficiency and product yield.

The present invention provides a method for producing hydrocarbons, comprising the steps of: (S1) heat-treating organic waste to produce a first mixed gas; (S2) dry reforming the first mixed gas in a first fixed bed reactor to generate a second mixed gas; (S3) separating the second mixed gas into a first material flow containing carbon dioxide and a second material flow containing hydrogen and carbon monoxide; (S4) enabling the first material flow separated in the step (S3) to flow into a second fixed bed reactor, and converting the first material flow into carbon monoxide through a reverse Boudala reaction; (S5) mixing the second material flow with the carbon monoxide converted in the step (S4) to prepare a third mixed gas; (S6) generating a synthesis gas from the third mixed gas by a water-gas shift reaction; and (S7) producing hydrocarbons from the synthesis gas by catalytic reaction.

The application relates to the field of automobile seat framework cutting, in particular to a laser cutting equipment for automobile seat framework, which comprises a workbench and the like; support wheels are fixedly connected to the left and right sides of the top of the workbench; a guide frame is fixedly connected to the middle of the top of the workbench; a fixed mounting frame is arranged on the right part of the guide frame; a movable mounting frame is arranged on the left part of the guide frame in a sliding mode; a cylinder is connected between the movable mounting frame and the fixed mounting frame; and a material placing mechanism is arranged in the movable mounting frame and the fixed mounting frame. The application adopts a differentiated repulsion driving strategy of multiple electromagnets which are independently controllable, has the outstanding advantages of fast response speed, high adjustment precision, non-contact wear and the like, and the like, and the corresponding magnetic blocks are arranged in a same-pole opposite mode between the electromagnets, so that even if the controller is temporarily powered off, the repulsion force will not disappear or be reversed in polarity instantaneously, and the system stability is higher.

The utility model relates to a platform assembly, a laser processing device and a solar cell manufacturing production line. The platform assembly comprises a bearing platform comprising a bearing surface; and the light processing coating is arranged on the bearing surface in a covering manner and is configured to be used for reflecting or absorbing the laser. According to the platform assembly, the laser processing device and the solar cell manufacturing production line, the probability that dents are formed in the bearing platform can be reduced, and damage to the bearing platform can be relieved.

The invention relates to an automobile line bundling support and a manufacturing die thereof, and relates to the technical field of die-casting die equipment, the automobile line bundling support is used for fixing and arranging lines, the manufacturing die is used for manufacturing the automobile line bundling support, and the automobile line bundling support comprises an upper fixing base, a lower fixing base, an upper cushion plate, a lower cushion plate, a movable die, a fixed die, a locking mechanism and a conveying mechanism; the movable die and the fixed die are designed in a sectional mode, the line turning bundling support in a complex shape can be directly machined and produced, and the steps of using the die and conducting follow-up manual machining are omitted.

The present invention relates to the technical field of solar cells, and in particular, to a laser cutting method for a flexible battery module, comprising: bonding glass and a battery cell together through a glue layer; cutting the glass with a first laser, and synchronously cutting the battery cell with a second laser; the laser beam emitted by the first laser and the laser beam generated by the second laser are configured to be coaxially focused, so that the first cutting path formed by the first laser cutting on the glass is aligned with the second cutting path formed by the second laser cutting on the battery cell; the laser emitted by the first laser forms a plurality of first laser cutting points distributed at intervals on the glass, and the laser emitted by the second laser forms a plurality of second laser cutting points distributed continuously on the battery cell. The method can accurately align the cutting lines of the glass and the battery cell, which is beneficial to the subsequent splitting and expanding operations, so as to achieve a better splitting effect, greatly improve the production efficiency and product yield, and the process is simple and easy to operate.

The invention belongs to the field of oil and gas fields, and provides a tall oil-based surfactant and a preparation method and application thereof.The preparation method of the tall oil-based surfactant comprises the steps that S1, tall oil acid and diethanol amine serve as raw materials and are subjected to an amidation reaction under the action of a solid base catalyst, and tall oil diethanolamide is obtained; s2, carrying out esterification reaction on the tall oil diethanolamide and maleic anhydride which serve as raw materials under the action of a solid acid catalyst and a negative pressure condition to obtain tall oil diethanolamide succinic acid monoester; and S3, mixing the tall oil diethanolamide succinic acid monoester and a sodium sulfite solution, reacting, adding ethanol after the reaction is completed, stirring, and filtering to obtain a liquid which is the tall oil-based surfactant. The tall oil-based surfactant disclosed by the invention can be independently used as a surfactant for an oil-displacing agent, and the chromatographic separation effect caused by different adsorbability of each component after a traditional compound oil-displacing agent system enters a stratum is overcome.