477 results about "Green production" patented technology

The invention relates to the technical field of semiconductor chips, in particular to a semiconductor chip flushing device and a cleaning method thereof.The semiconductor chip flushing device comprises a cleaning table, a cleaning frame is arranged on the inner wall of the middle of the cleaning table, the cleaning table comprises a cleaning water recycling box, and the rear side of the cleaning water recycling box is fixedly connected with a U-shaped vertical plate; according to the wafer cleaning device, the cleaning table and the cleaning frame are arranged, rapid cleaning of wafers is achieved, one wafer is flushed while the other wafer is pre-flushed through circulating water, the cleaning efficiency is effectively improved, the cleanliness of the surfaces of the wafers is ensured, in addition, the cleaning efficiency is improved, and the cleaning efficiency is improved. According to the device, through the design of the transmission mechanism, the orientation of the wafer is rapidly switched, the overall working efficiency is further improved, meanwhile, through the recycling design of cleaning water, water resources are saved, the production cost is reduced, and the concept of green production is met.

The invention belongs to the technical field of peanut oil preparation methods, and particularly relates to a high-quality peanut oil squeezing and peanut protein production process. According to the method, through accurate regulation and control of technological parameters and innovation of key technologies, efficient and synchronous extraction of the grease and the protein is achieved, and the high-quality characteristics of the grease and the protein are maintained. The process disclosed by the invention not only breaks through the technical limitation of mutual restriction of the quality of the two in the traditional extraction, but also remarkably improves the full-component utilization efficiency of the peanut resources, and promotes the upgrading of the peanut industry to the full-component high-valued and green direction.

The invention provides an industrial manufacturing industry-oriented carbon asset full life cycle management method and system, and the method comprises the steps: carrying out the cross-link feature fusion processing through obtaining an original carbon activity data set of an industrial manufacturing whole process, and generating carbon footprint feature data; and calling a pre-trained deep learning model to perform carbon asset state evolution analysis on the carbon footprint feature data, predicting a carbon asset evolution path, generating a carbon asset optimization strategy set based on a prediction result, including equipment energy efficiency regulation and control and a production plan recombination strategy, and pushing the carbon asset optimization strategy set to an industrial manufacturing execution system. And triggering an automatic control instruction reconstruction operation to realize automation and intelligence of carbon asset management, thereby comprehensively and accurately mastering a carbon asset state and an evolution rule, formulating a scientific and effective optimization strategy, reducing carbon emission, improving energy utilization efficiency, and improving green production capacity of an enterprise.

The invention relates to the technical field of tunnel engineering prefabricated part production, in particular to a large-diameter duct piece independent kiln assembly line conveying prefabricating method and system. S2, a reinforcement cage and an embedded part are installed; s3, concrete is precisely poured and vibrated; s4, pre-curing and surface treatment; s5, carrying out roller way type flow conveying; s6, hydration heat-driven dynamic maintenance is carried out; and S7, demolding and finished product detection. And S8, mold circulation. According to the large-diameter duct piece prefabricating production line, through technical innovation in multiple aspects of mold, conveying, maintenance, control and the like, the core technical problem in existing large-diameter duct piece prefabricating production is solved, high-precision, high-efficiency, low-energy-consumption and green production of large-diameter duct pieces is achieved, and the large-diameter duct piece prefabricating production line has remarkable technical advantages and wide application prospects and is suitable for large-diameter duct piece prefabricating production. The method can be widely applied to infrastructure construction projects such as shield tunnels, open caisson projects and underground comprehensive pipe galleries.

The invention relates to the technical field of polymer composite materials, and discloses an excimer skin-touch coating and a preparation method thereof.The coating is prepared from polyurethane dispersoid, organic silicon modified acrylic resin, a skin-touch additive, inorganic pigment filler, a solvent and a functional additive, the preparation method comprises the following steps: compounding base materials of polyurethane and organic silicon modified acrylic resin to form an interpenetrating network skeleton, then introducing a skin feeling auxiliary agent and a pigment filler step by step to realize gradient dispersion, and finally finishing system optimization through the synergistic effect of rheological regulation and functional auxiliary agents. Through a molecular structure interpenetrating network, intelligent process control and environmental protection technology integration, the core problems of easy touch attenuation, strong environmental sensitivity, auxiliary agent migration, pollution emission and the like of a traditional skin-touch coating are solved. The technology of gradient copolymerization anchoring, humidity dynamic compensation, closed-loop process control and the like is creatively fused, and multiple breakthroughs of long-acting skin feeling, high environmental adaptability and green production of the coating are achieved while excellent mechanical performance is kept.

The invention belongs to the technical field of environment-friendly intelligent manufacturing of sanitary disinfection products, and discloses a disinfectant concentration self-adaptive control and environment-friendly production optimization system and a disinfectant concentration self-adaptive control and environment-friendly production optimization method. Four invention points of a disinfectant concentration dynamic proportioning algorithm, a disinfection effect real-time verification model, a green production parameter optimization mechanism and a full-flow energy efficiency collaborative management and control framework are provided, and two innovative algorithms of concentration proportioning correction calculation and green production energy efficiency optimization are included. By constructing a concentration control-effect verification-energy efficiency optimization full-process collaborative closed loop, the disinfectant concentration control precision is remarkably improved, the disinfection effect verification timeliness is greatly enhanced, the energy consumption and environmental protection property in the production process are remarkably improved, and the method is suitable for production scenes of products such as liquid disinfectants, aerial fog disinfectants and disinfection gel and has wide application prospects. And the precision and greenization level of sanitary disinfection production is comprehensively improved.

The invention relates to an industrial process soft measurement method, in particular to an industrial process soft measurement method based on a hierarchical space-time enhanced quality related network. Performing normalization processing on the original data; a multi-head hierarchical time enhancement module (MHTE) is designed, local time characteristics are extracted through cross convolution, global time characteristic extraction is guided, and local and global characteristics are fused; a stacked encoder framework is constructed; introducing a mixing quality regularization mechanism combining a maximum information coefficient (MIC) and a Jaccard similarity coefficient (JSC); and optimizing the model through layer-by-layer pre-training and regression fine tuning. And the trained soft measurement model is utilized to carry out online quality prediction, and real-time monitoring and production strategy adjustment are carried out, so that the product quality and the production efficiency are improved, and green production is promoted. Simulation experiments prove that the method can efficiently extract dynamic spatio-temporal characteristics, and has high prediction precision and stability.

The invention discloses a metal plate connecting or forming device and method based on aluminum foil electric explosion impact force, and relates to the technical field of high-speed forming and connecting of the metal plate machining technology, and the device comprises an upper pressing block, a lower insulating block, a base plate, an objective table and an impact force transmission block; an objective table is slidably arranged on the base plate; the lower insulation block is arranged on the base plate, a working cavity is formed in the lower insulation block, the impact force transmission block is placed in the working cavity, and an aluminum foil is placed at the top of the lower insulation block and connected with a pulse current discharge system; a supporting cantilever is installed on one side of the base plate, and the upper pressing block is arranged on the supporting cantilever. According to the aluminum foil electric explosion impact device, an original aluminum foil electric explosion impact device is improved, a machined metal plate can be better in forming quality or connecting quality, the surface of the plate can be kept clean, environmental pollution is reduced, and green production is achieved.

The invention discloses a method for preparing high-modulus sodium silicate and co-producing white carbon black from rice hull ash. The method comprises the following steps: crushing the rice hull ash, and acidizing to obtain purified rice hull ash powder; reacting the purified rice hull ash powder with 5wt%-15wt% of caustic soda generated by bipolar membrane electrolysis to prepare a sodium silicate solution; carrying out neutralization reaction on the sodium silicate solution and 1-15 wt% of sulfuric acid solution under the assistance of ultrasonic waves, and filtering to obtain silicon dioxide silica gel and filtrate; washing and drying the silicon dioxide silica gel to obtain a white carbon black product; and carrying out electrolytic treatment on the filtrate through a bipolar membrane electrodialysis system, and respectively recycling the recovered alkali liquor and acid liquor. According to the method, resource utilization of the rice hull ash and cyclic regeneration of the reaction medium are realized, and a green production process is formed.

The invention discloses a high-yield gastrodia elata planting method based on Tilia brachypoda fungus material optimization and seed ramie stress resistance activation. According to the high-yield gastrodia elata planting method based on Tilia brachypoda fungus material optimization and seed ramie stress resistance activation, yield increase and quality improvement are achieved through fungus material composite strengthening treatment and a composite strain synergistic inoculation technology. The method comprises the following steps: (1) fermenting a tilia brachypoda substrate by lactobacillus plantarum and soaking in a nano-composite nutrient solution to form a high-activity bacterial material; (2) nitrogen-fixing bacteria, disease-resistant actinomycetes and armillaria mellea are mixed and inoculated according to the proportion of 3: 1: 1, nitrogen supply is improved, and the occurrence rate of black rot is reduced; 3) activating a GASA stress-resistant gene of the seed hemp through a pulsed electric field (5 kV / cm, 10 microseconds), and enabling the germination rate to reach 88.5% in combination with a calcium signal channel strengthening technology; according to the method, the yield per mu of gastrodia elata is increased by 30%-40%, the gastrodin content is increased by 30% or above, the chemical pesticide dosage is reduced by 55%, the strain passage purity is stable, the method is suitable for large-scale planting in multiple climate areas, and an innovative solution is provided for green production of traditional Chinese medicinal materials.

The invention discloses an SAM hydrolase mutant and application thereof, the specific activation effect of halogen anions (F <->, Cl <->, Br <-> and I <->) on SAM hydrolase (containing MJ1651 wild type and mutant) is found for the first time, and the active sequence of the SAM hydrolase is F <-> > I <-> > Br <-> = Cl <->. According to the method, 400 mM of halide salt is added into a reaction system, so that the catalytic efficiency is improved in a breakthrough manner; the yield of wild type enzyme adenosine is improved by 20-300% (optimally, an F-system); the yield of the mutant R89C is soaring up by nearly 6 times under the action of KF; the activity of the immobilized enzyme is still more than 90% after the immobilized enzyme is repeatedly used for 5 times. The method is easy and convenient to operate, green production is achieved with water as the solvent (three wastes are reduced by 90%), the comprehensive cost is reduced by 41%-80 / kg, and an efficient solution is provided for industrial biological manufacturing of antiviral drug intermediates and the like.

The invention relates to a method for preparing (S)-chiral amine through asymmetric catalysis of imine reductase, and belongs to the technical field of biological pharmacy. Comprising the following steps that imine reductase catalyzes imine to be subjected to a reductive hydrogenation reaction under the conditions of coenzyme and a coenzyme regeneration system, and the (S)-chiral amine compound is generated. According to the method, imine reductase is utilized to catalyze imine asymmetric reduction to prepare the innovative drug (S)-chiral amine compound, and compared with a traditional chemical synthesis method, the method has the advantages of being high in reaction efficiency, good in stereoselectivity, mild in reaction condition, environmentally friendly and the like, and is a method meeting the green production requirement.

The invention discloses a lignocellulose biomass-based hard carbon negative electrode material as well as a preparation method and application thereof. The method comprises the following steps: carrying out hydrothermal pretreatment on lignocellulose biomass by using low-corrosivity maleic acid, and regulating and controlling the composition of the lignocellulose biomass, the maleic acid and the lignocellulose to obtain a precursor rich in lignin and cellulose; in the pyrolysis and carbonization process, the thermal stability of the precursor is improved, and the lignin can more effectively inhibit the rapid concentrated pyrolysis of cellulose, so that the rearrangement of pyrolysis products is weakened. The method is beneficial for preventing overgrowth of hard carbon graphite microcrystals during high-temperature carbonization, so that the hard carbon material with large interlayer spacing and abundant small-size closed pores is prepared. The hard carbon material shows high specific capacity and excellent rate capability when being applied to the negative electrode of the sodium-ion battery. Meanwhile, xylose and furfural generated by decomposition of hemicellulose in a liquid phase can be effectively collected, and full-component utilization of biomass is achieved. The requirements of green production are met, and industrial application is easy to realize.

The invention discloses a transparent shrinkage-free functional film and a production process thereof, and belongs to the technical field of high polymer material film production.A chain extender and a molecular regulator synergistically regulate and control a polyvinyl chloride molecular chain cross-linked structure to enhance the strength of the film, and a migration type slipping agent and an environment-friendly dispersing agent are combined for compounding to achieve long-acting surface slipping; meanwhile, a water freezing rapid shaping process is innovatively adopted to replace a polluting powder scattering technology, and a pre-stretching and anti-rolling dynamic stress eliminating technology is integrated, so that the problems that a traditional functional thin film is too high in shrinkage rate, insufficient in transparency, declined in smoothness and production pollution are systematically solved; the synergistic breakthrough of near-zero shrinkage, high transparency, lasting smoothness and green production is achieved for the first time in the field of ultrathin semi-hard films.

The invention discloses an escherichia coli engineering strain with high benzyl acetate yield and application thereof. The escherichia coli strain efficiently expresses a brand new biosynthetic pathway related gene of benzyl acetate; comprising a phenylalanine lyase gene, a cinnamic acid coenzyme A ligase gene, a 3-hydroxyacyl coenzyme A dehydrogenase gene, a 3-oxoacyl coenzyme A ketohydrolase gene, an enoyl coenzyme A hydratase gene, a carboxylic acid reductase gene, a phosphoric acid pantetheinyl transferase gene and an acyltransferase gene. The obtained escherichia coli engineering strain can utilize a sustainable and cheap raw material glucose as a carbon source to realize efficient synthesis of benzyl acetate. The yield of benzyl acetate synthesized by the escherichia coli benzyl acetate engineering bacteria is the highest yield of benzyl acetate synthesized by a microbial fermentation method reported at home and abroad from beginning. The benzyl acetate produced by the engineering strain has the advantages of reliable quality, economic product, green production and the like, and has important economic value and social benefit.

The invention discloses a linalool engineering bacterium and an application of the linalool engineering bacterium in fermentation production of linalool, and the linalool engineering bacterium is escherichia coli and contains a plasmid pJBEI-MVA and a plasmid pET-AgGPPs-MaLIS. The microbial fermentation technology is utilized, the resource limitation is overcome, the production process is controllable, the period is short, and the green production concept is met. The optimized culture medium formula and material supplementing strategy can effectively relieve the toxicity of linalool and improve the metabolism efficiency and stability of the strain. The purification process is simple, high-purity linalool is obtained through reduced pressure distillation, and the high-end application requirements of spices, medicines and the like are met. In addition, energy consumption and process complexity are reduced, production cost is reduced, economic benefits are improved, the method is suitable for industrial production, and an efficient solution is provided for sustainable supply of linalool.

The invention discloses a green production process of magnesium glycinate, which comprises the following steps: adding deionized water into a reaction kettle, heating, adding glycine for dissolving, adding magnesium hydroxide or magnesium oxide after dissolving, reacting at 80-95 DEG C, keeping the temperature for 30-60 minutes, filtering out unreacted magnesium hydroxide or magnesium oxide after the reaction is finished, adding the magnesium hydroxide or magnesium oxide into the reaction kettle again, and cooling to room temperature to obtain the magnesium glycinate. Cooling, crystallizing and centrifugally separating the filtered mother liquor to obtain a wet product and separated mother liquor, completely circulating the separated mother liquor, re-putting the separated mother liquor into the reaction kettle, and drying, screening and packaging the magnesium glycinate wet product to obtain a finished product. The magnesium glycinate prepared by the production process is high in purity, does not need additional organic solvents, is energy-saving and environment-friendly, and realizes continuous industrial green production.

The invention discloses a pollution source dynamic acquisition and monitoring method and system, relates to the technical field of pollution source dynamic acquisition and monitoring, and solves the problem that a scheme capable of sensing the pollution situation and autonomously optimizing the monitoring frequency is difficult to set in pharmaceutical production. And a dynamic threshold is difficult to set according to the dynamic influence of the environmental variable on the pollution diffusion rule. According to the method, the predicted pollution concentration of the current time period is obtained through the pre-evaluation model; determining the data acquisition frequency of the current time period according to the pollution concentration of the previous time period and the predicted pollution concentration of the current time period; acquiring the pollution concentration of each pollution source in the current time period based on the data acquisition frequency of the current time period; determining an alarm instruction of each pollution source based on the pollution concentration in the current time period, and giving an alarm based on the alarm instruction; according to the invention, environmental risk control can be changed from passive response to active prevention, and technical support is provided for green production and sustainable development of the pharmaceutical industry.

The invention relates to the field of PQQ production, in particular to an engineering bacterium for producing pyrroloquinoline quinone and a preparation method of the engineering bacterium. According to the invention, different broad-host shuttle vectors are used, PQQ is expressed in denitrifying hyphomicrobe to synthesize related gene clusters, denitrifying hyphomicrobe engineering bacteria with high yield of PQQ are successfully constructed, and the engineering bacteria have the characteristics of rapid growth, high fermentation yield and the like, and lay a foundation for realizing green production of PQQ.

The invention discloses a bergamot alkene synthase mutant and application thereof, and belongs to the technical field of enzyme engineering and bioengineering. According to the method, bergamotene synthase SanSyn which is obtained from plant clausena lansium and can catalyze FPP to generate alpha-trans-bergamotene is taken as an object, semi-rational design and site-specific mutagenesis are carried out on the bergamotene synthase SanSyn, a series of obtained SanSyn mutants are remarkably improved in the aspect of FPP substrate conversion efficiency, and the optimal bergamotene synthase mutant SanSynI273C-L514I has the advantages that the optimal bergamotene synthase mutant SanSynI273C-L514I can be used for catalyzing the FPP to generate alpha-trans-bergamotene; the unit cell productivity of the alpha-trans-bergamotene generated by catalyzing FPP is 6.9 times of that of a wild type, and the yield is 6.8 times of that of the wild type and reaches 43.58 mg / L. According to the bergamot alkene synthase mutant, the performance of alpha-trans-bergamot alkene synthesized by microorganisms is enhanced, and an effective technical route is provided for green production of industrial high-purity bergamot alkene.

The invention discloses curtain cloth and a production process thereof, and aims to solve the problems that the conventional curtain cloth is inflammable and the conventional flame-retardant treatment method has defects. The curtain cloth comprises base cloth and a flame-retardant layer which coats and permeates the base cloth, and the flame-retardant layer contains raw materials such as a composite resin matrix and flame-retardant filler. The composite resin matrix is composed of a waterborne epoxy emulsion and UV-cured epoxy acrylate, and the flame-retardant filler contains phosphorus-nitrogen hybridized sodium alginate and nano-grafted lignin microspheres. The production process comprises the steps of base cloth activation, flame-retardant coating preparation, electrostatic-high-pressure double spraying, gradient curing and after-finishing strengthening. Through unique raw material compounding, the limit oxygen index of the curtain cloth is increased, combustion is delayed, and smoke is reduced; the washing resistance is improved by the amphiphilic film-forming agent; the production process ensures the performance of the base cloth, reduces energy consumption and VOC emission, and meets multiple requirements of modern buildings on safety, durability, comfort and green production of the curtain cloth.

The invention discloses an agro-ecology intelligent monitoring regulation and control method and system based on machine learning, and relates to the technical field of intelligent monitoring, and the method comprises the following steps: training an attribution model, executing a first operation according to a first calculation result, dividing a farmland area, obtaining a problem reason, compensating the attribution model, and carrying out second regulation and control. Through a result and reason feedback mechanism, the problem that a traditional model cannot be self-corrected is solved, long-term regulation and control reliability is remarkably improved, attribution results are bound with farmland grids, precise operation such as variable fertilization and fixed-point irrigation is supported, resource waste is avoided, investment of chemical fertilizers, pesticides and passivators is reduced while the pollution risk is reduced, and the economic benefit is improved. And cost saving, efficiency increasing and green production are achieved synchronously.

The invention discloses a jet printing visual food freshness label and a manufacturing method and application thereof. The manufacturing method of the visual food freshness label comprises the following steps: firstly, preparing the metal nanocluster; the obtained metal nanocluster dispersion system is compounded with polyvinylpyrrolidone, and the ink is formed through ultrasonic dispersion and heat treatment; mixing a solvent with polyvinylpyrrolidone to obtain a regulating agent; the ink and the regulating agent are injected into independent ink boxes of an ink-jet printer respectively, patterns are deposited on a low-fluorescence background substrate through preset printing parameters, and the patterns are sealed and stored after being dried. Compared with other intelligent indication labels, the fluorescent intelligent label prepared by the invention has the remarkable advantages of low cost, high stability, uniform luminescence and capability of realizing large-scale and rapid preparation; and in the preparation process of the label, the use amount of the metal nanocluster solution can be greatly reduced, so that a more environment-friendly and green production mode is realized.

The utility model discloses antibacterial and radiation-proof composite polyester dyed cloth, and aims to provide the antibacterial and radiation-proof composite polyester dyed cloth which has the advantages of improving the overall antibacterial performance, improving the product quality and the use comfort and prolonging the service life. The fabric comprises a base cloth layer, the base cloth layer is formed by interweaving warp and weft, the outer side face of the base cloth layer is connected with a first antibacterial layer, the side face of the first antibacterial layer is connected with an anti-radiation layer, the inner side face of the base cloth layer is connected with a second antibacterial layer, the anti-radiation layer and the second antibacterial layer are both connected with a waterproof breathable film layer, and the side face of the waterproof breathable film layer is connected with a wear-resistant layer. The utility model has the beneficial effects that the composite polyester dyed cloth has antibacterial, sun-proof, anti-aging and tear-resistant properties; the use comfort is realized; leakage and corrosion are prevented; the wear-resistant degree is improved, and the surface attractiveness of the fabric is protected; the service life is prolonged; the method has renewable green production benefits; the skin-friendly performance is realized.

The utility model relates to the field of chemical equipment structures, in particular to a device for recycling carbon dioxide in acrylate tail gas, which comprises an alkali spray tower, a recycled alkali liquor storage tank, a circulating pump A, a circulating pump B and a circulating condenser, according to the utility model, the liquid alkali in the recovered alkali liquor storage tank passes through the circulating pump A and the circulating condenser and then circularly enters the alkali spray tower to form circulating liquid alkali spray liquid, and the acrylate tail gas enters the alkali spray tower from the bottom and is absorbed by the circulating liquid alkali spray liquid in the alkali spray tower; when the content of sodium carbonate in the liquid caustic soda spraying liquid reaches the recycling requirement, the liquid is transferred to a workshop to be continuously recycled for a washing process, so that washing raw materials are saved, the pressure of subsequent tail gas treatment is also reduced, and the concepts of low carbon emission and green production are achieved.

The invention relates to the technical field of building materials, and discloses a low-temperature environment-friendly processing technology of multistage molding powder, which comprises the following steps: mixing fluorine-modified phenolic resin, hydroxylated nitrile rubber and filler to obtain a premix; extruding and pelletizing the premix through a double-screw extruder to obtain master batches; crushing, grinding and grading the master batch, and collecting powder; putting the powder into a fluidized bed, and spraying fumed silica to obtain primary molding powder; and screening molding powder without anti-corrosion level, first-level anti-corrosion, second-level anti-corrosion, third-level anti-corrosion and fourth-level anti-corrosion. The prepared molding powder is comprehensively improved in heat insulation, corrosion resistance, adhesive force and weather resistance, the process adopts low-temperature processing design, the green production concept is met, the molding powder can be widely adapted to different corrosion environments and use requirements, and the molding powder has remarkable practical value and popularization prospects.

The application provides a kind of sodium sulfide nine hydrate and activated olefin / acetylene preparation polyether and its method, belong to sulfur-containing polymer technical field.The structural formula of polyether in the application, R 1 And R 2 Independently be substituted or unsubstituted alkyl, substituted or unsubstituted alkoxy, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl;The number of carbon atoms of the alkyl is 1-10, the number of carbon atoms of alkoxy is 1-10, the number of carbon atoms of aryl is 1-30, the number of carbon atoms of heteroaryl is 3-30;Substituted alkyl and substituted alkoxy independently are one or more;N is an integer of 2-4000.The application is used as sulfur source sodium sulfide nine hydrate, under the condition of no metal catalyst, polyether is synthesized by polymerization reaction;Reaction condition is mild, reaction is efficient, economic and environmental protection, meet the current green production concept and can avoid the use of dangerous reagent.

The invention belongs to the field of organic synthesis, and discloses tetrahydronaphthalene-1-ketone as well as a preparation method and application thereof.The tetrahydronaphthalene-1-ketone is obtained by mixing tetrahydronaphthalene, carbon nitride and persulfate in an organic solvent (acetonitrile or dichloromethane) and reacting under the illumination condition of 395-457 nm. The preparation method disclosed by the invention is relatively high in yield, conforms to a green production concept, is environment-friendly, low in cost, simple to operate and high in selectivity, and is expected to be used for industrial production.

The present application belongs to the technical field of bisphenol F epoxy resin, and particularly relates to a preparation method of bisphenol F epoxy resin. In a protective gas atmosphere, bisphenol F, epichlorohydrin and an inorganic strong alkali aqueous solution are mixed to perform etherification reaction to obtain a reaction liquid containing chlorohydrin ether; under negative pressure, the inorganic strong alkali aqueous solution is added dropwise to the reaction liquid containing chlorohydrin ether to perform ring closure reaction to obtain bisphenol F epoxy resin; the dropwise adding includes sequentially performing first stage dropwise adding, second stage dropwise adding and third stage dropwise adding. By adopting a two-step method, no solvent or additive is needed in the pre-reaction stage, the dropwise adding procedure of liquid alkali in the main reaction stage is controlled, the alkali utilization rate is effectively improved, the raw material consumption is reduced, the side reaction is reduced, the quality of bisphenol F epoxy resin is improved, the product has high epoxy value and low hydrolyzable chlorine, and the safe and green production level is reached.

This invention relates to a method for preparing the fenelone intermediate 2-cyanoethyl(4S)-4-(4-cyano-2-methoxyphenyl)-5-ethoxy-2,8-dimethyl-1,4-dihydro-1,6-naphthidine-3-carboxylic acid ester, and also relates to diastereomeric salts (Va), (Vb), (Vc), and / or (Vd). This method is simple to operate, and the diastereomeric salts can be obtained with very high chemical and enantiomeric purity (tartrate ester content <0.05%) through a single dissociation, avoiding the raw material loss and waste problems caused by multiple dissociations. It also has low production costs and meets the requirements of green production.