232 results about "By-product" patented technology

The utility model discloses a folding type movable belt loading and unloading machine, and relates to the technical field of material transferring, loading and unloading equipment. Comprising a rack, a loading and unloading transportation device, a lifting device, a moving device and a control box 10, the loading and unloading transportation device comprises a loading and unloading transportation fixing assembly and a loading and unloading transportation bending assembly; the loading and unloading transportation fixing assembly is low in left and high in right, the lower left portion of the loading and unloading transportation fixing assembly is connected with the left end of the rack, and the lower right portion of the loading and unloading transportation fixing assembly is supported by the upper ends of stand columns 17 arranged on the front side and the rear side of the upper right portion of the rack. The right end of the loading, unloading, transporting and fixing assembly is rotationally hinged to the left end of the loading, unloading, transporting and bending assembly. The upper end of the lifting device is rotatably hinged to the lower portion of the middle left portion of the loading, unloading, transporting and bending assembly, and the lower end of the lifting device is rotatably hinged to the right end of the rack. The automatic loading and unloading device has the characteristics of convenience in use, better stability, safety, reliability, loading and unloading functions and the like, and can be used for transferring agricultural and sideline products, industrial products and luggage goods such as kelp, tobacco leaves, beet, hemp fiber and the like.

The utility model relates to the technical field of agricultural and sideline products, and discloses a loading device for agricultural and sideline product distribution. Comprising a bottom plate and further comprises an air cylinder fixed to the top of the bottom plate and used for adjusting the loading height, a piston rod of the air cylinder is fixedly connected with a supporting frame, and the inner wall of the supporting frame is slidably connected with a supporting plate used for supporting the agricultural and sideline products. The surface temperature of the agricultural and sideline products can be reduced, the influence of heating stress of the agricultural and sideline products is relieved, the agricultural and sideline products are protected against high-temperature damage, the supporting plate is pulled to slide in the supporting frame, the bearing area of the supporting plate can be adjusted, and follow-up bearing and loading of large agricultural and sideline products are facilitated; and the supporting plate and the supporting frame can be limited and fixed through a clamping rod and a limiting block, the effect of adjusting the use height of the supporting plate is achieved, and subsequent loading at different heights is facilitated.

The invention relates to the technical field of product process traceability, in particular to an agricultural and sideline product processing traceability method based on production whole process monitoring. The method comprises the following steps: acquiring environmental data, duration time and link shelf life of each batch of products in different link processes; analyzing loss caused by environmental influence in the links to obtain environmental loss evaluation indexes; determining a risk gain coefficient according to the change of the link shelf life; the accumulated loss rate of the product in the whole process is determined; determining a sensitive batch according to the accumulated loss rate of the product; determining the sensitive index of any link according to the distribution of the sensitive batches under any link and the cumulative loss rate change of the sensitive batches in any link and the previous link; and according to the cumulative loss rate and the sensitive index of the whole process of the deteriorated product, determining the positioning priority, and carrying out positioning monitoring on the production link according to the positioning priority. According to the invention, the quality problem of agricultural and sideline product processing can be quickly and accurately positioned and traced.

The present invention relates to the technical field of screening and conveying equipment, specifically an agricultural and sideline products grading and selection machine; mainly through the combined use of the screening and conveying auxiliary mechanism and the conveying auxiliary component, it provides an excellent auxiliary work for the screening of agricultural products, cotton seeds. By setting the material storage bin in the screening and conveying auxiliary mechanism above the conveying bench, the material falls from the discharge port at the bottom of the material storage bin onto the conveyor belt, and then the material is conveyed to the screening mesh cylinder device for selection work. In this process, on the one hand, the material to be screened and processed is stored in the material storage bin, which can realize the continuous conveying of the material, thereby improving the continuity of the material screening work and having a positive effect on improving the screening work efficiency; a conveying auxiliary component is arranged at the position between the conveyor belt and the screening mesh cylinder device to provide a guiding and conveying work for the conveyed material; the present invention can better meet the actual use requirements.

The invention relates to a beef tallow treatment method and beef tallow and byproducts obtained through the beef tallow treatment method, and belongs to the technical field of grease processing. The beef tallow processing method comprises the following steps that beef tallow is heated to break crystals, then cooling and crystal growing are conducted, soft fat and first solid fat are separated after crystal growing, and the temperature of cooling and crystal growing is 37 DEG C or below, preferably 35-37 DEG C; the temperature for heating and crystal breaking is 65 DEG C or above; the crystal growing time is more than 2 hours, preferably 2-5 hours. According to the method, grease components which are easy to foam in the beef tallow can be gathered in the solid fat, so that the soft fat which is not easy to foam is obtained. Then the obtained solid fat is treated by using absolute ethyl alcohol with a specific proportion under a certain temperature condition, so that foaming can be effectively reduced, and the use amount of the ethyl alcohol can be remarkably reduced.

Delivery mechanisms and distribution mechanisms are varied, adjusted, or modified based on a desired fuel application. Dimensions, flow rates, pressures, viscosities, temperatures, friction parameters, and combinations thereof may be varied, adjusted or modified. The fuel application may include a scrubber application. The scrubber application uses a delivery mechanism to deliver a wet or dry scrubbing agent at a low pressure to a distribution mechanism. The distribution mechanism distributes the scrubbing agent within the scrubbing chamber. The delivery mechanism is adjustable based on properties of a feedstock utilized to deliver the scrubbing agent, properties of a propellant, or properties of the scrubbing application. The distribution mechanism is adjustable based on desired distribution characteristics including shape, size, or velocity of drops, mists, or particles distributed. Location, processes, and by-products associated with output of the scrubbing application may be based on a stage of the scrubbing application.

The utility model provides a packing device for agricultural and sideline product production, which relates to the technical field of agricultural and sideline product packing and comprises a conveying table, a support is arranged on one side of the conveying table, and an electric push rod is fixedly mounted at the bottom of the support; the fixing assembly is arranged at the bottom of the electric push rod and comprises a connecting rod, a clamping jaw, a fixing rod, a connecting seat, an extrusion rod, a moving rod and a gear; the cleaning assembly is arranged at the bottom of the electric push rod and comprises a nozzle, an air exhaust hole and an air pipe. According to the packaging device for agricultural and sideline product production, through the arrangement of the fixing assembly, a bottle opening is clamped, the positions of the bottle opening and a nozzle are fixed, dislocation of the bottle opening and the nozzle is prevented, through the arrangement of the cleaning assembly, an air extracting pump extracts air from a liquid outlet hole in the nozzle through an air pipe, so that liquid on the inner wall of the liquid outlet hole is pumped into an air extracting hole, and therefore the liquid outlet hole is cleaned. Liquid is prevented from flowing out from the nozzle bottom.

The present application belongs to the technical field of waste oil recycling, and particularly relates to a method for recycling and processing by-products of edible vegetable oil processing, comprising the following steps: S1, mixing raw materials with deionized water and potassium permanganate, wherein the raw materials comprise soapstock, oil foot and deodorized distillate; S2, performing gradient separation treatment on the mixed liquid obtained in step S1, wherein the gradient separation treatment comprises centrifugal separation, mixed solvent extraction and ultrasonic-assisted separation; and S3, recycling oil and fat products and solid products obtained in step S2. The present application realizes the collaborative treatment of multiple types of by-products, the comprehensive recovery rate of oil and fat reaches more than 85%, the energy consumption is reduced by 35%, the use of strong acid and strong base is avoided, it is green and environmentally friendly, the operation is simple, and it is suitable for industrial application.

The application discloses a modularized screw conveyor for adjustable feed processing, and belongs to the technical field of agricultural and sideline product processing and conveying mechanical equipment, comprising a plurality of cylinder bodies, the plurality of cylinder bodies are expandable connected through supporting rings, and the cylinder bodies located at the sides are each provided with an end cover, one side of the end cover is connected with a rotary driving part, and at least two cylinder bodies are connected with pipelines. In the application, through the built-in limiting mechanism, a single limiting rod is pushed by the central telescopic driving part, the axial thrust is converted into radial movement through wedge surface cooperation, a plurality of clamping blocks are driven to be synchronously clamped into the clamping grooves of the screw conveying part, the quick assembly and disassembly and firm locking of the screw conveying part are realized, the first spring is matched to absorb the rotary torsion, and the wedge of the fixed block and the groove of the expanded shaft end is matched, so that the accuracy of torque transmission under long-distance expansion and the high stability of overall operation are ensured, and the strength requirement of continuous conveying of large quantities of agricultural and sideline products is met.

The utility model discloses a settling aid feeding and dissolving device for reducing the turbidity of primary brine, which comprises a feeding bin, a suction device, a discharge device, a pre-dissolving device, a dissolving overflow device and a storage device, the feeding bin is connected with the suction device through a discharge pipe, a filter cloth bag is arranged in the suction device, the upper part of the filter cloth bag is connected with an air suction pipe and an air blowing pipe, and the air blowing pipe is connected with the pre-dissolving device. The feeding device is arranged on the lower portion of the material suction device, the discharging auger is arranged at the bottom of the feeding device, the pre-dissolving device is arranged at a discharging port of the discharging auger, the pre-dissolving device is connected with the dissolving and overflowing device, and the dissolving and overflowing device is connected with the storage device. Compared with the prior art, the feeding and dissolving device disclosed by the utility model has the advantages that a settling agent is continuously added, the dissolving effect of the settling agent is improved, the settling speed of solid particles in a subsequent reactor can be accelerated, magnesium ions in a crude brine solution are effectively removed, the turbidity of primary brine is reduced, and the whiteness of secondary mud of precipitates is improved; and a foundation is laid for subsequent preparation of high-quality byproducts.

The utility model discloses a coke oven production byproduct recovery device, including the furnace column, the top fixed mounting of furnace column has the gas collecting pipe, the inside fixed mounting of gas collecting pipe has the second spraying mechanism, the bottom fixed mounting of gas collecting pipe has the first aperture pipeline, the top fixed mounting of gas collecting pipe has the II type pipe, the one end fixed mounting of II type pipe away from gas collecting pipe has the air suction pipe. The utility model discloses through first spraying mechanism, second spraying mechanism and third spraying mechanism reasonable control and regulate the circulation ammonia water spray amount of doped tar, reach the setting temperature 78 90 DEG C of reducing raw coal gas export system even control at lower temperature, increase the recovery of tar, naphthalene, acidic gas etc. byproduct in raw coal gas, reduce the load of tar, naphthalene, acidic gas etc. in raw coal gas recovery in the operation process of recovery system primary cooler, prolong the maintenance time and service life of primary cooler etc. recovery equipment, save the cost, have the remarkable environmental protection, economic benefit.

The application discloses a process for purifying and separating n-hexane waste gas in grain oil production and belongs to the technical field of waste gas treatment of agricultural and sideline products. Mixed adsorbents are introduced into a solvent absorption tower, n-hexane waste gas is adsorbed by the solvent absorption tower to obtain mixed absorption liquid, and the mixed absorption liquid is treated by a desorption tower to realize separation of n-hexane and the mixed adsorbents. The whole process does not involve catalytic reaction, mainly relies on physical absorption and desorption process to realize separation and recovery of n-hexane, and does not need to suspend grain oil production, realizes synchronous performance of grain oil production and n-hexane tail gas separation, and can effectively improve grain oil processing efficiency.

The utility model belongs to the technical field of agricultural and sideline products, and particularly relates to portable agricultural and sideline product picking equipment which comprises an electric telescopic long rod, a mounting seat is fixedly connected to the top of the electric telescopic long rod, a scissor body is fixedly connected to the top of the mounting seat, and a mounting ring is fixedly connected to the circumferential surface of the electric telescopic long rod. A net barrel is fixedly connected to the bottom of the mounting ring, an anti-accumulation device for preventing the agricultural and sideline products from being accumulated in the bent net barrel is arranged on the circumferential face of the electric telescopic long rod, the anti-accumulation device comprises a first fixing plate, and the side face of the first fixing plate is fixedly connected to the circumferential face of the electric telescopic long rod. According to the agricultural and sideline product picking device, the problems that the picking efficiency is reduced, fruits are easily pressed or collided and damaged, and the product quality is influenced due to the fact that agricultural and sideline products are accumulated in the bent net cylinder in the device are solved, so that the smooth picking process is ensured, the picking efficiency is improved, and the overall working effect and the picking effect of the device are improved.

The application discloses a vacuum chamber for automatic filling and byproduct recovery in natural gas cracking hydrogen production, and relates to the technical field of hydrogen production equipment. The chamber body is internally provided with a feeding unit and a collecting bin. The top of the collecting bin is provided with a feeding opening. A conveying assembly is used for driving a receiving member to sequentially pass through the collecting bin and the feeding unit. A dust removal assembly comprises a baffle arranged at the feeding opening and a first driving assembly connected with the baffle. When the receiving member moves above the feeding opening, the first driving assembly drives the baffle to move away from the feeding opening, thereby opening the feeding opening, so that the feeding opening on the receiving member is communicated with the feeding opening, and the product in the receiving member falls into the collecting bin, thereby realizing the collection of byproducts. When the receiving member is not located above the feeding opening, the first driving assembly can drive the baffle to close the feeding opening, so that the collecting bin is isolated from the chamber body, thereby ensuring that the natural gas cracking hydrogen production has a high reaction rate.

This invention relates to single-use products made from composite materials, processes for making single-use products, and premixes that can be used in such processes. The inventors have developed composite materials comprising a combination of a non-wood lignocellulosic material and a biodegradable and / or compostable polyester, preferably a polyhydroxyalkanoate. Such composites can be processed into molded articles such as cups, plates, straws, and cutlery, possessing functionality suitable for replacing conventional SUPs produced from petrochemical-based plastics. The lignocellulosic material can originate from by-products of agro-food production. The production of these composite materials and their processing into molded (single-use) articles is straightforward, can be carried out using conventional machinery, and consumes relatively small amounts of energy, chemicals, and / or water.

Embodiments of the disclosure provide systems and methods for monitoring of manufacturing processes and tracking of production byproducts. Monitoring of manufacturing processes and tracking of production by-products can comprise reading a Bill of Materials (BOM) for a product. A component cost value for a by-product can be assigned for each component of the plurality of components in the BOM for the product. A process cost value for the by-product can be calculated for each manufacturing process of a plurality of manufacturing processes to produce the product using the plurality of components. The component cost value for the by-product for each component and the process cost value for the by-product for each manufacturing process can be accumulated into a total by-product cost value for the product. The total by-product cost value for the product can be provided.

The invention discloses a combined pretreatment method and application of red mud. Comprising the following steps: calcining red mud at high temperature, cooling and sieving to obtain calcined red mud; mixing the calcined red mud with water, heating and stirring; heating and stirring are kept, and CO2 gas is introduced in an intermittent ventilation mode; after ventilation is finished, the obtained slurry is subjected to vacuum filtration separation, and red mud filtrate and red mud filter residues are obtained; and freeze-drying the red mud filtrate to obtain red mud-based alkali activator powder. Other chemical reagents are not introduced in the whole treatment process, alkali of the red mud and an industrial byproduct CO2 are utilized, waste is used for treating waste, and the environmental benefit is remarkable.

A process for preparing paper pulp, comprising the following steps: - mixing (E10) a mass percentage of a fibrous by-product (10) with a complementary mass percentage of cellulose pulp (20), wherein the fibrous by-product (10) comprises at least one of the following: coffee husks obtained from roasting coffee beans, the coffee husks having a mass percentage of water-soluble compounds greater than 15% and a mass water content less than 20%, and textile dust having a length of less than 5 mm; and - refining (E20) the mixture to obtain the paper pulp. Figure for the abstract: Fig. 1

The present invention belongs to the technical field of zearalenone extraction and relates to a method for extracting zearalenone from corn steep liquor to prepare a crude standard. The method comprises centrifuging corn steep liquor containing ZEN to obtain a supernatant; treating the supernatant using a PA66 membrane to obtain a PA66 membrane enriched with ZEN; eluting the PA66 membrane enriched with ZEN to obtain an eluate; and purifying the eluate by rotary evaporation to obtain a crude ZEN standard. The PA66 membrane is used to enrich and extract ZEN from ZEN-contaminated corn byproducts, achieving an enrichment and extraction efficiency exceeding 90%, providing a reliable and effective method for the high-value utilization of corn byproducts. The PA66 membrane is used to efficiently and selectively adsorb and enrich ZEN to initially prepare a crude ZEN standard, providing a new approach to the preparation of ZEN standard products.

The utility model belongs to the technical field of coal dressing, and particularly relates to coal dressing equipment with a dust collecting function, which comprises a base, and the top of the base is fixedly connected with a support rod; coal preparation equipment is fixedly connected to the end part of the supporting rod; motors are fixedly connected to the end parts of the coal preparation equipment and are symmetrically arranged; the output end of the motor is fixedly connected with a rotating rod, and the other end of the rotating rod is rotationally connected to the inner side wall of the coal dressing equipment. The end part of the rotating rod is fixedly connected with a crushing roller; then the cyclone dust collector is started, so that the cyclone dust collector generates suction force through the dust collecting pipe to suck the generated dust into the dust collecting pipe, and then the cyclone dust collector separates coarse particle dust in the airflow by utilizing centrifugal force, so that the treatment efficiency is improved; as primary pretreatment, the load of subsequent equipment is reduced, and collected coarse particles can be directly returned to a production process or used as low-value byproducts.

The utility model discloses a chenopodium quinoa willd cleaning device, which relates to the field of cleaning equipment and comprises a base, the top of the base is fixedly connected with a fence, the upper ends of the inner sides of the left wall and the right wall of the fence are symmetrically provided with a first sliding chute and a second sliding chute, and a sliding plate is connected in the first sliding chute and the second sliding chute in a sliding manner; the bottom of the sliding plate is fixedly connected with a plurality of soft bristles, and the bottoms of the bristles are exactly attached to the top of the base. A third sliding groove and a fourth sliding groove are bilaterally symmetrically formed in the lower ends of the inner sides of the left wall and the right wall of the fence, a sliding rod is slidably connected into the third sliding groove, a fixing rod is fixedly connected into the fourth sliding groove in a front-back penetrating mode, one end of a hollow plate is fixedly connected to the tail end of the sliding rod, the other end of the hollow plate slidably sleeves the outer side of the fixing rod, and the hollow plate is clamped with a clamping plate; the chenopodium quinoa willd cleaning machine solves the problems that when a common family or a food shop cleans chenopodium quinoa willd, the cleaning efficiency is low, and the economic efficiency of chenopodium quinoa willd by-products is low.

The application discloses a waste lubricating oil refining production base oil byproduct extraction oil dechlorination device in the technical field of waste lubricating oil treatment, which comprises a first mixing chamber, a second mixing chamber is connected to the discharge port of the first mixing chamber, a settling tank is connected to the discharge port of the second mixing chamber, a flash tower is connected to the settling tank, and a feeding hopper is arranged on the first mixing chamber; pressing pieces and heating plates are arranged on the upper and lower sides of the inner cavity of the first mixing chamber, the pressing piece comprises a mounting seat, a frame and a cutting piece, an opening is formed in the bottom of the cutting piece, and the bottom of the mounting seat is provided with a filling piece; a telescopic mechanism is arranged on the first mixing chamber, the metal sodium is heated by the heating plate in the application, so that the metal sodium is melted and conveniently mixed with the subsequent base oil, the metal sodium is prevented from adhering to the cutting equipment, the loss of the metal sodium is avoided, the extraction oil is fully dechlorinated, and a separate cleaning device does not need to be arranged, so that the production cost is reduced.

The utility model relates to the technical field of agricultural and sideline products processing equipment, and disclose a kind of agricultural and sideline products processing integrated dehydration drying equipment, including support frame, two dehydration drying barrels are fixedly connected between the support frame, the rear sidewall surface of dehydration drying barrel is fixedly connected with driving motor, the front side of dehydration drying barrel is open, the front side of dehydration drying barrel is rotatably connected with barrel door, the bottom surface of dehydration drying barrel is fixedly communicated with drain pipe, the inside of dehydration drying barrel is provided with rotating mechanism, and the rotating mechanism includes the support frame fixedly connected on the inside wall surface of dehydration drying barrel, and rotating shaft is rotatably connected between two supports. In the utility model, dehydration and drying two processing steps are integrated by the setting of rotating mechanism, shorten the processing time, improve production efficiency, avoid local overheating, so as to ensure the drying uniformity and quality stability of agricultural and sideline products.

This invention relates to a method for producing biodiesel from beef tallow obtained from slaughter by-products. Specifically, it concerns how to pretreat the beef tallow using pressure distillation and filtration, then mix it with alcohols and a basic catalyst under optimized conditions for esterification, followed by a systematic post-processing procedure to produce high-quality biodiesel. According to the manufacturing method of this invention, the pretreatment conditions, reaction conditions, and post-processing are all optimized, thereby enabling the economical production of high-quality biodiesel with high yield.

A transport box (1) for transporting, in particular, foodstuffs, food raw materials and meat by-products is proposed, which has a wirelessly locatable chip (2). Furthermore, a system (100) for locating a transport box (1), a location network (200), a method for determining the position of a transport box (1) and a method for operating a location network (200) are proposed.

An agricultural crop sprayer includes a chassis supported by a plurality of ground- engaging elements. A main product tank, a secondary product tank, and a boom are carried by the chassis. A first plurality of nozzles are spaced along the boom and in fluid connection to the main product tank, and a secondary nozzle is adjacent an end of the boom and in fluid connection to the secondary product tank. The secondary nozzle is isolated from the main product tank. A method of applying products to an agricultural field includes spraying a first product from a main product tank through a first plurality of nozzles spaced along a boom onto the agricultural field, and spraying a secondary product from a secondary product tank through a secondary nozzle adjacent an end of the boom.

The utility model discloses an agricultural and sideline product surface preliminary scrubbing device, which comprises a mounting rack and a scrubbing frame, the scrubbing frame is rotatably arranged in the mounting rack, the front side and the rear side of the inner cavity of the mounting rack are rotatably provided with rotating shafts through bearings, and the utility model relates to the technical field of agricultural and sideline product processing. According to the preliminary scrubbing device for the surfaces of the agricultural and sideline products, a lifting plate, an electric telescopic rod and a lifting frame are arranged between a scrubbing frame and a mounting frame, so that the scrubbing frame easily inclines by an angle, and the effect of accelerating returning of the agricultural and sideline products is achieved; the sealing effect of the discharging sealing plate can be synchronously relieved, the effect of convenient material returning is achieved, and then the rotating sleeve is rotationally arranged on the surface of the pressing roller, so that the friction performance between the pressing roller and the top plate can be reduced through the rotating performance of the rotating sleeve.

This invention discloses a system and method for hydrogen production from waste aluminum and resource utilization of byproducts, belonging to the field of solid waste treatment and resource utilization technology. This invention innovatively integrates four technologies—hydrogen production from waste aluminum alkaline solution, calcification for silicon removal, seed decomposition for aluminum extraction, and intelligent alkaline solution recycling—into a continuous system. While producing hydrogen from waste aluminum, it simultaneously recovers aluminum hydroxide and calcium silicate resources, improving resource utilization. A staged impurity removal strategy is adopted to ensure the purity of byproducts while simultaneously achieving the recycling of alkaline solution, thereby reducing process costs and improving environmental benefits. An energy recovery and utilization unit is set up to use the heat released from the tail gas and hydrogen production reaction to heat the internal heating devices, significantly reducing external energy demand. An inert gas recovery device is also equipped in the hydrogen storage unit to reduce external material consumption, thus improving the economics and engineering feasibility of the process.

This application discloses a cleaning device, belonging to the field of cleaning equipment for agricultural and sideline product processing. The cleaning device includes a main frame, a controller connected to the main frame, and a cleaning assembly. The cleaning assembly includes a scraping assembly and a brush assembly connected to the main frame, which is supported and connected to a power assembly that drives the cleaning device; the brush assembly and the power assembly are driven and connected to the controller. This cleaning device can achieve good cleaning results and efficiency.

The invention relates to a method for purifying a byproduct menthone in a menthol production line. Aiming at a byproduct menthone generated in a process of producing menthol through thymol hydrogenation, the method comprises the following steps: rectifying a reaction product at a tower top temperature of 90 DEG C, a tower kettle temperature of 140 DEG C and a vacuum degree of-94.4 kPa, and extracting an enriched mixture of new menthol and menthone as a raw material; heating the raw materials to 50 DEG C for dissolving, cooling to 35-38 DEG C, and stirring for 30-60 minutes; adding 0.5-1g of seed crystal, carrying out programmed temperature control for 3-5h, cooling to 25-27 DEG C, carrying out heat preservation for 1-2h, and carrying out centrifugal separation on the crystal and a mother solution; the mother liquor is put into a rectifying tower, the column height is 140 cm, the inner diameter is 30 mm, a west tower ring filler is 3 mm * 3 mm, the kettle temperature is controlled to be 120-135 DEG C, the vacuum degree is 15-20 mmHg, the reflux ratio is 20: 2-50: 2, and qualified menthone is extracted. Through combination of crystallization enrichment and rectification, menthone in the menthol production by-product is directly purified, the problems of complex process, high cost and by-product waste of a traditional synthesis method are solved, and efficient utilization of resources is realized.