102results about How to "Convenient sale" patented technology

An article of footwear including an upper formed of a flexible upper material and a sole formed of a flexible sole material, wherein the sole is rolled, folded, or collapsed onto itself to reduce the volume of the article of footwear. The article of footwear in a collapsed state can then be packaged in a container. This container can be dispensed by a vending machine in a convenient urban area.

The invention relates to a self-organized model constructing method of a cloud resource sharing peer-to-peer network, a distributed peer-to-peer network for short. The topology structure of the distributed peer-to-peer network is constructed through adoption of a space division concept. Physically closed cloud noses are self-organized. A reachable routing table is extended. The cloud peer-to-peer network which takes data as a core and is equipped with performances such as low delay and extensibility is realized. According to the method, in a large scale cloud resource distributed sharing environment, cloud node information is managed in real time, rapid resource positioning is carried out to the computing resource demand of each user, and an inquiring result is returned. Compared with the prior art, the method has the advantages that the method has clear average cloud resource inquiring delay advantage, the computing capabilities of the nodes are utilized fully, the actual performance of the cloud computing application is satisfied, and the method has wide application prospects in cloud resource sharing aspects.

The invention relates to a dry biological demulsifier powder and an alcaligenes sp. that are used for demulsification in oil exploiting industries. The alcaligenes sp. in oil-polluted oilfield soil is selected, a whole liquid culture medium of the alcaligenes sp. is centrifugalized at the speed of 10000rpm, and a wet mycelium is obtained, baked at the temperature of 105 DEG C for 24 hours and grinded, thus obtaining the dry biological demulsifier powder. From the field tests in oilfield spots, the dry biological demulsifier powder can achieve the dehydration rate of 66.7 to 96.5 percent in 120 to 150 minutes when the addition amount is 100 to 200 milligrams per liter, thus overmatching chemical demulsifiers that are used on the spot. The dry biological demulsifier powder is produced by parching the strain culture medium with demulsification effect, thus solving the inconvenience of the biological demulsifiers with a whole liquid culture medium in the aspects of sale, transportation, storage and the like, and lowering the possibilities that the metamorphic whole liquid culture medium causes the reduction of demulsification effect and other components in the whole liquid culture medium affect oil products and subsequent water processing effect.

The invention discloses an ion-conductive polymer electrolyte membrane, a preparation method thereof and electrochromic glass, belonging to the field of building materials. According to the preparation method, a membrane can be independently formed from a polymer electrolyte membrane by virtue of casting formation and can be compounded with an electrochromic layer formed on a first conductive glass substrate and an ion storage layer formed on a second conductive glass substrate, so as to assemble the electrochromic glass.

The invention provides a multifunctional nutrient soil formula and a preparation method thereof. The multifunctional nutrient soil is prepared from sandy loam soil, wormcast, sika deer dung, urea, calcium superphosphate, attapulgite, sodium hydrogen carbonate, high-quality peat, perlite powder, decomposed straw, edible fungus sticks, plant ash, controlled-release fertilizer, distillers' grains, rice hull, aloe and deionized water. The multifunctional nutrient soil prepared by combining sandy soil and natural plant and animal organic fertilizer concentrate is high in moisture and fertilizer retention abilities, can effectively improve the gas permeability of soil, and is high in stress resistance and disease prevention performance, thus being suitable for guaranteeing the vigorous growth of flowers and trees throughout the year; after the multifunctional nutrient soil is used, fertilizer does not need to be additionally applied in the growth process; furthermore, the granular nutrient soil is convenient to carry and sell, thus meeting the market requirements.

The embodiment of the invention discloses a realizing method of photo taking-and-sell business, a client side and a server side. The realizing method includes the steps that a camera on a terminal is called for taking the picture of a commodity to be sold and sends the picture to the server side; a returning package issued by the server side based on the picture is received and comprises the identity information for determining the purchase page chained address of the commodity to be sold; the purchase access of the commodity to be sold is obtained according to the returning package and comprises a two-dimension code of the page purchase page chained address; the purchase access is issued. By means of the technical scheme, a most convenient commodity-selling method can be provided for insightful fashion lovers. A commodity is sold while photographed through the photography function on the terminal. The transaction cost of commodities is reduced. The transaction speed is improved. User experience is improved.

The invention relates to the technical field of textile machinery and facilities and discloses a textile placement box with a drying function. The textile placement box comprises a base, a box body and a transmission shaft, wherein the top of the base is fixedly connected with the bottom of the box body, one side of the bottom of the inner wall of the box body is fixedly connected with a motor through a connecting block, an output shaft of the motor penetrates through the box body and extends to the outside of the box body, and the outer surface of the end, extending to the outside of the box body, of the output shaft of the motor is sleeved by a first belt wheel. The textile placement box provided by the invention has the advantages that the condition that the dried and processed textile becomes wet due to long term storage is avoided, so that the long term storage of the textile is realized, the material characteristics, attractiveness and cleaning degree of the textile are ensured, so as to better facilitate the sale of the textile, and meanwhile, the dehumidification on the textile by production personnel is facilitated and the production efficiency of the production personnel is improved.

The invention discloses an agricultural automation pineapple picking machine. The agricultural automation pineapple picking machine comprises a driving device, a picking device and a delivering counting device; the driving device is a power part of the machine; a double-shaft motor drives a driving wheel to rotate; a cutter disc in the centre of a frame is a main picking device; adjusting mechanisms are arranged on the two sides of a cutter disc frame; the delivering counting device is arranged below a fruit outlet position of the cutter disc; out-flow fruit enters a fruit storage box througha conveyor belt; a shearing device is arranged right below the cutter disc for shearing pineapple rods at the same height; a baffle plate is arranged between the cutter disc and the shearing device, so that a blocking phenomenon when the shearing pineapple rods enter equipment is avoided. An operating table is arranged at the top of the frame; an electric box is arranged on one side, close to an operator, of the frame. According to the equipment, the labour intensity can be lightened; the picking quality and the production efficiency are improved; the research and development of the equipmenthas very important significance in the field of pineapple picking.

The invention discloses a frozen egg drop processing method and an egg drop cooking device. The method comprises the step of preparing egg drop fluid, wherein the egg drop fluid comprises the raw materials: 3%-8% of vegetable oil, 85%-95% of egg pulp, 1%-5% of pre-gelatinized starch, 0.01%-0.5% of xanthan gum, 0.01%-0.3% of beta-carotene, 0.01%-0.3% of sodium tripolyphosphate, 0.01%-0.3% of sodiumpyrophosphate, 0.01%-0.3% of sodium hexametahposphate, 1%-10% of drinking water, 0.01%-0.05% of beta-carotin, 1%-5% of potato starch and the balance of filtering water. The method comprises the processing steps: oily-phase solution blending, aqueous-phase solution blending, egg drop fluid emulsifying, filtering magnetic separation, egg drop cooking, packaging, quick freezing, metal detecting andboxing and warehousing. The egg drop cooking device can be used for stirring egg drop and perform automatic charging. The method and the device have the beneficial effects that hand charging is not required, and uniform charging can be carried out, so that the working efficiency is increased; and working personnel can be prevented from scalding, so that potential safety hazards are reduced.

The invention discloses an automatic taping and gluing device, a carrier tape and a taping method. The automatic taping and gluing device comprises a feeding mechanism, a tape sealing mechanism, a glue spraying mechanism and a winding mechanism, wherein the feeding mechanism is used for conveying workpieces and placing the workpieces in grooves of the carrier tape, the tape sealing mechanism is arranged at the lower station of the feeding mechanism and used for packaging the carrier tape with the grooves containing the workpieces, the glue spraying mechanism is arranged at the lower station of the tape sealing mechanism and used for being aligned with through holes of the carrier tape and spraying glue to the workpieces in the grooves, and the winding mechanism is arranged at the lower station of the glue spraying mechanism and used for winding the carrier tape obtained after glue spraying. The workpieces have viscosity at the normal temperature, so that the workpieces can be fixed at specified positions, the situation that position deviation occurs due to vibration of chip mounting equipment and affects subsequent workpiece processing is avoided, meanwhile, it is unnecessary to additionally use a glue dispensing process, the chip glue dispensing process of a circuit board is simplified, and the working efficiency is improved.

The invention discloses an automatic tube penetrating packaging machine. A needle suction mechanism for sucking an acupuncture needle on a needle feeding groove into a plastic tube on a tube feeding groove is arranged on a working table, a needle handle of the acupuncture needle sucked into the plastic tube is exposed out of the plastic tube, a piece pushing mechanism synchronously inserting the needle handle and a plastic piece into the plastic tube and a vibration disc mechanism conveying the plastic piece to the piece pushing mechanism are arranged on a packaging machine body, through the needle suction mechanism, the acupuncture needle is sucked into the plastic tube, and pushing force for pushing the acupuncture needle into the plastic tube does not need to be exerted to the acupuncture needle, so that bending or scrapping generated in the process of pushing the acupuncture needle into the plastic tube is avoided, appearing of a large number of non-performing products in the packaging process is avoided, and the yield of packaging is improved.

In one example, our mobile application and system provide users with a way to sell / buy books to and from those around them. Users would first create an account linked to their .edu email address. Using a third party payment program, the user then links their payment information. This allows for the transfer of money safely with the security of this third party company. When a student or any other user wants to sell their book, they log into their account and can then enter their course number, book title, description of condition, and selling price. This can be automated by simply taking a picture of the ISBN or bar code, and it automatically populates the fields, allowing the student to change the price and condition. Other variations are also shown in the specification.

The invention discloses a seedling raising by cutting method of taxodium 'Zhongshansha' in green house containers. The seedling raising by cutting method comprises the steps of preparing seedbeds, performing cutting and performing management after cutting. The invention also discloses substrates for seedling raising by cutting of taxodium 'Zhongshansha' in green house containers. The substrates consist of the following components of 76-84% of turf, 7-9% of perlite, 5-7% of carbonized rice chaff, 3-5% of vermiculite and 1-3% of controlled-release fertilizers. A high bed cultivation mode is combined with adjustment of components of the substrates, control of temperature and humidity during the seedling raising period is guaranteed, and the substrates consisting of the turf, the perlite, thecarbonized rice chaff, the vermiculite and the controlled-release fertilizers are combined for use, so that the survival rate can be greatly increased, cutting seedlings of the same year can be sold in the same year to generate economic benefits and can be completely sold before plum rain season the next year, production of next batch of cutting seedlings of the taxodium 'Zhongshansha' in glass green houses is not influenced, transformation and upgrading of a conventional seedling raising manner of forestry seedlings to high-quality development are realized, and a high-efficient development mode of being short, stable and fast, of the forest seedling industry can be realized.

The invention discloses an automatic collection and packaging device for mulberry fruit, which relates to the technical field of fruit collection equipment. The invention includes a collecting vehicle, a vibrating motor, a steering controller, a telescopic rod, and a first semicircular net pocket and a second semicircular net pocket that cooperate with each other , a fruit recovery pipe for recovering fruits, a protective net for preventing leaves from falling into the device, the first semicircular net pocket and the second semicircular net pocket are respectively connected to the steering controller through a telescopic rod, and the steering controller is connected to the vibration The motor is fixed, the vibrating motor is installed on the side wall of the collection vehicle, one end of the fruit recovery pipe communicates with the center of the first semicircular net bag, the other end of the fruit recovery pipe communicates with the inside of the collection vehicle, and the protective net is installed on the The top of the first semicircle net bag and the second semicircle net bag. The invention has the advantages of separating leaves and fruits and improving the purity of fruit collection.

The invention provides a food processing device and a control method thereof. The food processing device comprises a main ingredient conveying device, a main ingredient extruding device, a main ingredient moulding device and a control device, wherein the outlet of the main ingredient conveying device and the inlet of the main ingredient extruding device are sealed and fixedly connected, the outlet of the main ingredient extruding device and the inlet of the main ingredient moulding device are sealed and fixedly connected, the main ingredient moulding device is a pipeline with one end closed, and the side wall of the first pipeline and the outlet of the main ingredient extruding device are sealed and fixedly connected. On the basis, the invention also provides a food processing device with a stuffing extruding and moulding function, and a stuffed convenient product with a wrapper can be produced. The food processing device provided by the invention has the advantages that batch production of the convenient food in fixed shape and length is realized, the sanitation problem caused by manual production is completely eradicated, and the produced product is standardized in shape and quantity and is convenient for packaging and sale.

The invention discloses a rice drying and impurity removal device convenient for bagging. The device comprises equipment support frames arranged in an array, short transverse support frames and long transverse support frames distributed in a mirrored mode are arranged between the equipment support frames, supporting legs are arranged at the lower ends of the equipment support frames, long equipment racks and short equipment racks distributed in a mirrored mode are arranged at the upper ends of the equipment support frames, bagging frames are arranged on one sides of the equipment support frames, rotating funnels are arranged in the bagging frames, first rice outlets are formed in the lower ends of the rotating funnels, a trash removal box is arranged below the long equipment racks and theshort equipment racks, a rice hopper is arranged above the long equipment racks and the short equipment racks, a first screening plate and a second screening plate are installed in the trash removal box, a first conveyor belt is installed on one side of the rice hopper, a second conveyor belt is arranged below the trash removal box, an air dryer is arranged above the second conveyor belt, and a winnowing box is also arranged on one side of the trash removal box. According to the device, loading, screening and drying of rice are convenient for operators to carry out, bagging of the rice after treatment is convenient, equipment is convenient to clean, the labor intensity of the operators is reduced, and the rice is convenient to sell and store after treatment.

The invention discloses a plastic cloth edge sealing, winding and storing device. The device comprises a hollow lower rack and an upper rack arranged above the lower rack and is characterized in that a rectangular opening is formed in the top of the lower rack, a transmission machine is horizontally arranged in the opening, and is higher than the top of the lower rack, the two sides of the transmission machine are each inwards provided with a ring of groove, bending components are arranged on the two sides of the lower rack, the upper rack is provided with an extrusion component and an edge sealing component, a winding component is arranged on a supporting frame, is used for winding plastic cloth obtained after edge sealing and winds the plastic cloth obtained after edge sealing roll by roll, and packaging storage and selling are facilitated; a collection box is arranged in the supporting frame and used for temporary storage of the wound plastic cloth, one-by-one manual conveying is omitted, unified carrying is achieved after a certain number of workpieces are stored, and the efficiency is greatly improved; and the device has the beneficial effects of being high in use efficiency, capable of achieving batched machining and the like.

The invention relates to a semi-automatic machine for removing lotus plumules from fresh lotus seeds. The semi-automatic machine comprises a machine frame and semi-automatic machine assemblies for removing lotus plumules from fresh lotus seeds; each semi-automatic machine assembly comprises a fixed plate and an inclined block; a movable rod sleeve is arranged in each inclined block; a positioninggroove is formed in each movable rod sleeve; a propping head with a hollow structure is arranged in each positioning groove; after a lotus seed is close to a positioning groove, an operator presses the lotus seed gently until the propping head penetrates through the surface of the lotus seed in a propping manner; an inflatable component is connected to each propping head; high-pressure gas is inflated into the lotus seeds through the inflatable components, so that the plumules of the lotus seeds are forced to be extruded toward the small head ends of the lotus seeds; and a proximity switch isarranged on each inclined block. The semi-automatic machine disclosed by the invention has the advantages that the high-pressure gas is inflated into the lotus seeds through the inflatable components,so that the plumules of the lotus seeds are forced to be extruded toward the small head ends of the lotus seeds, automatic operation of removing the plumules of the lotus seeds is realized, the disadvantage that the conventional manual operation of lotus plumule removal from the lotus seeds wastes time and energy is effectively overcome, the efficiency of lotus plumule removal is improved, the intactness rate of fresh lotus seeds is high, the appearance of the lotus seeds after lotus plumule removal is excellent, the selling of the lotus seeds is facilitated and damage to the lotus seeds is reduced.

The invention discloses a mechanical ventilating system for storing high-moisture rapeseeds and a ventilating method of the mechanical ventilating system. By arranging appropriate U-shaped ventilating networks inside a barn, arranging vertical ventilating pipes on branch air ducts of the U-shaped ventilating networks, forming every two U-shaped ventilating networks into a storage unit, arranging an air dehumidifier between the storage units, limiting the storage amount to air path ratio of each storage unit and reasonably setting the ventilation conditions and the relation between moisture of grain in grain stacks and the temperature of the grain, the aims of reducing the moisture, lowering the temperature of the high-moisture rapeseeds and adjusting the quality of the high-moisture rapeseeds are achieved. By means of the mechanical ventilating system and the ventilating method, the high-moisture rapeseeds can be safely stored within 2 months to 4 months, the cost of enterprises for storing the rapeseeds is reduced to be within 15 yuan per ton, the storage capacity of the enterprises is greatly improved, loss is avoided for farmers, and good economic benefits and social benefits are obtained.

The invention discloses a display cabinet for displaying electronic products. The display cabinet comprises a cabinet body, wherein the cabinet body comprises a left cabinet part and a right cabinet part; the right side face of the left cabinet part is connected to the left side face of the right cabinet part by virtue of a rotating shaft; a left edge frame is arranged on the left side face of the left cabinet part; a clamping groove is formed in the left edge frame; a left fixed rod is arranged in the left cabinet part; left connecting bases are arranged at both the top and the bottom of the left fixed rod; left rotary discs, which are uniformly distributed, are arranged on the left fixed rod; placing boxes are arranged on the upper surfaces of the left rotary discs; placing cavities are kept in the placing boxes, and left supporting rods are arranged in the placing cavities; and baffle plates are arranged at the top of the left supporting plates in an inclined mode. According to the electronic product display cabinet, a plurality of products can be placed, so that a space utilization rate is improved, and a space can be saved; the left cabinet part and the right cabinet part can be clamped together, so that the volume of the cabinet body can be diminished to facilitate storage and moving; the cabinet body can be prevented from getting invaded by dust, so that the interior of the cabinet body is kept clean; and the display cabinet is high in space utilization rate and is convenient to use.

The invention discloses an organic planting method for psammosilene tunicoides. The planting method comprises the following steps: 1, selecting land; 2, preparing the land; 3, selecting seeds and treating the seeds; 4, performing sowing; 5, performing thinning and performing transplanting; and 6, performing field management. According to the invention, creatively, flower buds which grow in summers are pruned to promote root growth, the seeds which are ripe in autumns are batched according to harvesting time, the seeds are separately planted through selection, and therefore problems that the psammosilene tunicoides seeds have a bad sowing seedling emergence rate and the fertilization is difficult to uniformly control because the psammosilene tunicoides seeds have inconsistent maturity periods are effectively solved; and flower branches are pruned in the summers, thus no seeds are generated, autumn seeds are cultivated and timing harvest is performed, thus a situation in the prior art that cleaning is difficult because the seeds which are too late to harvest are fallen in field and become weeds is avoided. Through cool and heat alternate seed soaking, the seeds are promoted to germinate, and seed coats are loose and soft, and through slow stirring, the seed coats are broken or break away under conditions that the seeds are not damaged, and the seedling emergence rate of the seeds is greatly improved.

The invention relates to the field of chemical engineering and particularly discloses a device for synthesizing nitromethane and separating products. The device comprises a horizontal reactor, a product separation device and a product purification device which are sequentially connected from front to back, wherein a cavity of the horizontal reactor is divided into a plurality of mutually communicated reaction units by virtue of a plurality of flow baffles, a reactor stirring mechanism penetrating through each reaction unit is arranged in the cavity of the horizontal reactor along the axis direction of the horizontal reactor, and the front end of the reactor stirring mechanism stretches out of the side wall of the head end of the horizontal reactor and is connected with a reactor driving mechanism. According to the device, the problem that nitromethane only can be produced in an intermittent manner in a current domestic nitrite substitution method is solved; and by virtue of continuous reaction and rectification operation, the large-scale industrial production can be well realized, the production cost is lowered, the production efficiency is improved, and a lot of problems including environmental pollution and the like are solved.

The invention provides a preparation method of 3,4-dichloro-5-cyan-isothiazole. The 3,4-dichloro-5-cyan-isothiazole is an important midbody of a series of isothiazole pesticides and medicines. The invention also discloses a green preparation method, comprising the following steps of: suspending sodium cyanide in dimethylformamide, dropping carbon disulfide at 20-30 DEG C, reacting for 3h at 60 DEG C, introducing chlorine in a reaction mixture, reacting for 3h at 60 DEG C, decompressing and recycling dimethylformamide, adding ethyl acetate in residue for backflow and dissolution, cooling and then filtering to remove undissolved substances, recycling ethyl acetate, cooling, crystallizing, filtering to obtain a first product, adding water to the mother liquor and distilling to obtain a second product, wherein the water for filtering the product can be circularly used. The invention avoids waste water emission in the whole production process. The yield ranges from 50-60%, the melting point ranges from 80 to 84 DEG C and the purity is 98% above.

The invention provides a beverage box. A matched drinking straw is fixed on one side of a box body by a sticker. As the drinking straw is arranged on the box body directly, the beverage box solves the problems of inconvenience and insanitation due to the fact that as being separated from the existing beverage box, the drinking straw needs to be supplied additionally while the beverage box is purchased, stored and transported, and thus the beverage box is convenient for customers to drink beverage and retailers to sell the beverage and is more beneficial to the management on sanitation.

The invention discloses a clamping and cutting mechanism for remote picking of orchard. The clamping and cutting mechanism comprises a mounting ring, a power mechanism and two moving mechanisms, wherein the mounting ring is fixed to the middle of the power mechanism, the two moving mechanisms are distributed at two ends of the power mechanism correspondingly, and a first moving plate and a secondmoving plate are arranged on the inner sides of the two moving mechanisms correspondingly; the two moving mechanisms can respectively drive the first moving plate and the second moving plate to move towards a central position of the mounting ring; a cut-off groove is formed in the inner side of the first moving plate, a cut-off tool is arranged on the inner side of the second moving plate, a flange is arranged on the mounting ring, a first guide rod is arranged on the flange and obliquely distributed relative to the moving direction of the second moving plate, and a guide sleeve is arranged atthe end, close to the flange, of the second moving plate. Manual operation can be replaced, so that the labor intensity is reduced; the fruit stems can be cut off through one-time operation, operation is easy, the risk that the integrity of fruits is damaged is eliminated, and selling is facilitated.

An optical disk storage box includes a storage body, a cover and a connecting arrangement that movably connects the storage body with the cover. The storage body includes a bottom board, a storage wall unit perpendicularly provided on the bottom board and defining a storage cavity. The storage wall unit includes a first storage wall, a second storage wall, a third storage wall and a fourth storage wall. The storage body further includes two blocking flakes inwardly and transversely extended from two ends of an upper edge of the third storage wall respectively, and at least a fastening member upwardly extended from the bottom board and having a predetermined distance from the first storage wall inside the storage cavity. The fastening member includes a longitudinal arm upwardly extended from the bottom board, and a transverse arm inwardly and transversely extended from an upper end of the longitudinal arm.

The invention discloses a system for distributing digital property right to a digital media. The system comprises an electronic digital signature server connected to a network, wherein the electronicdigital signature server at least comprises a memory and a processor, and further comprises a programmable instruction which is stored in the memory and operates on the processor; the instruction is configured to distribute the digital property right to the digital media, and the distribution includes configuration of the following contents of a container label, an author identifier, an owner identifier, a version identifier, a social contract identifier, an excitation model identifier and a hash function on the digital media, wherein the hash function is executed from items selected from a group formed by the container label, the author identifier, the owner identifier, the version identifier, the social contract identifier, the excitation model identifier and the hash function in order to create a unique hash identifier for each digital media.

The invention discloses an item transaction method. The method comprise the step that a transaction system platform used for displaying information, a user terminal, and several storage cabinet bodiesplaced at corresponding locations are set. The transaction system is provided with a background server used for processing related audit information. The storage cabinet bodies are provided with several access cells with locks. Compared with the prior art, the item transaction method provided by the invention has the advantages that the storage cabinets are arranged; the storage cabinets are provided with storage cells; online connection of the transaction system platform, the background server and the user terminal controls opening and closing of the storage cells of storage cabinets; a seller stores an item for sale in a cabinet body, so that the seller can autonomously pick up the item from the cabinet body; buyers and sellers carry out on-line transaction; the item is safely taken through the storage cabinet offline; the business mode provided by the invention combines traditional offline and current online, which can protect the rights and interests of both buyers and sellers, and can provide 24-hour non-stop service for each buyer to visually see the purchased item; and the seller can quickly and easily sell what he or she does not need.

The invention provides a preparation method of 3,4-dichloro-5-cyan-isothiazole. The 3,4-dichloro-5-cyan-isothiazole is an important midbody of a series of isothiazole pesticides and medicines. The invention also discloses a green preparation method, comprising the following steps of: suspending sodium cyanide in dimethylformamide, dropping carbon disulfide at 20-30 DEG C, reacting for 3h at 60 DEG C, introducing chlorine in a reaction mixture, reacting for 3h at 60 DEG C, decompressing and recycling dimethylformamide, adding ethyl acetate in residue for backflow and dissolution, cooling and then filtering to remove undissolved substances, recycling ethyl acetate, cooling, crystallizing, filtering to obtain a first product, adding water to the mother liquor and distilling to obtain a second product, wherein the water for filtering the product can be circularly used. The invention avoids waste water emission in the whole production process. The yield ranges from 50-60%, the melting point ranges from 80 to 84 DEG C and the purity is 98% above.