252 results about "Alkaline hydrolysis" patented technology

The invention belongs to the technical field of environmental protection, and provides a preparation method of an imine-modified functionalized mesoporous magnetic silicon dioxide nano material. The method comprises the following steps: synthesizing Fe3O4 magnetic nanoparticles in a Fe < 2 + > / Fe < 3 + > alkaline hydrolysis system through a coprecipitation method; then coating the magnetic nanoparticles with an amorphous silicon dioxide layer by taking TEOS (tetraethoxysilane) as a silicon source by adopting a sol-gel method, so as to prepare magnetic silicon coated nanoparticles; the prepared nano-particles are subjected to secondary silicon coating guided by a cetyl trimethyl ammonium bromide (CTAB) mesoporous template agent, and mesoporous magnetic silicon nano-particles are formed after calcination; and finally, carrying out surface amination modification on the mesoporous magnetic silicon nano-particles by utilizing an amino silane coupling agent, and then carrying out condensation reaction on the mesoporous magnetic silicon nano-particles and various aldehyde derivatives to construct imine bonds, so as to obtain the imine-modified functionalized mesoporous magnetic silicon dioxide nano-material. The imine-modified functionalized mesoporous magnetic silicon dioxide nano-material formed by the invention has the characteristics of efficient adsorption, rapid magnetic recovery and excellent environmental stability, and can effectively remove polystyrene micro-plastics and organic pollutants in a water body.

The invention discloses a preparation method of low-carbon-content high-purity quartz sand, which comprises the following steps: carrying out alkaline hydrolysis and drying on organosilane to obtain alkaline xerogel, putting the alkaline xerogel into a quartz tube of a rotary tube furnace, starting the furnace body, adjusting the rotation rate, heating to a specific low temperature, and introducing nitrogen to replace air; introducing oxygen, controlling the pressure, carrying out oxidation reaction, relieving the pressure to normal pressure after the reaction, pumping and discharging the product, and repeating the oxidation and pumping steps for many times until the tail gas carbon dioxide reaches the standard; raising the temperature, introducing chlorine-containing gas for purification, finally raising the temperature to a sintering temperature, and sintering in an air atmosphere to obtain the low-carbon-content high-purity quartz sand. According to the preparation method, the energy consumption and the equipment cost of the carbon removal procedure are greatly reduced, the specific surface area and the densification performance of the subsequent high-purity quartz sand product can be guaranteed, and a technical path which is low in energy consumption, high in efficiency and capable of giving consideration to the product performance is provided for industrial preparation of the high-purity quartz sand through a sol-gel method.

The invention discloses a preparation method of a lignite resin drilling fluid filtrate reducer, and relates to the technical field of petroleum and natural gas drilling engineering. The method comprises the following steps: carrying out superfine grinding on lignite, carrying out alkaline hydrolysis pretreatment on waste nylon PA66, alkalizing lignite powder, carrying out sulfonation reaction on the alkalized lignite powder and phosphorous acid to introduce phosphonic acid groups, carrying out cross-linking with tetrabutyl titanate to form a three-dimensional network structure, and adding a nano-montmorillonite suspension to realize physical enhancement. A reaction product is subjected to freeze-drying, a porous structure is reserved, and then the product and polyethylene glycol 400 are mixed and granulated. By utilizing humic acid functional group grafting, inorganic-organic composite cross-linking and waste raw material recycling technologies, the product still keeps excellent filtration loss control capability at the high temperature of 200 DEG C and in a saturated salt solution, the high-temperature and high-pressure filtration loss is less than or equal to 6.50 mL, the viscosity retention rate is greater than or equal to 92.8%, the lubricating coefficient reduction rate is greater than or equal to 48.5%, and the product has the advantages of temperature resistance, salt resistance, environmental protection and low cost, and is suitable for industrial production. And the method is suitable for deep oil-gas drilling engineering.

The invention relates to a strain of Lactobacillus coryniformis ZS-07 and an application of the Lactobacillus coryniformis ZS-07 in preparation of rare ginsenoside through fermentation, and belongs to the field of microbial fermentation, the Lactobacillus coryniformis ZS-07 is preserved in China Center for Type Culture Collection on January 4, 2026, and the preservation number of the Lactobacillus coryniformis ZS-07 is CCTCC NO: M 2026009. According to the invention, ginsenoside Rb1 is used as a raw material, and the rare ginsenosides 20 (S)-Rg3, 20 (R)-Rg3, Rk1 and Rg5 are prepared by fermentation and conversion of Lactobacillus coryniformis ZS-07. The preparation method comprises the following steps: preparing the rare ginsenosides 20 (S)-Rg3, 20 (R)-Rg3, 20 (R)-Rg3, Rk1 and Rg5; the ginsenoside Rb1 can be converted into 20 (S)-Rg3, 20 (R)-Rg3, Rk1 and Rg5 after fermentation, and different from conventional methods depending on alkaline hydrolysis, high temperature and high pressure or steam treatment, the process shows the advantages of excellent mild characteristic, environmental friendliness and low cost, and the content of converted products can be effectively increased. The invention constructs a new strategy for directional synthesis of rare ginsenosides 20 (S)-Rg3, 20 (R)-Rg3, Rk1 and Rg5, thereby widening the application prospect and industrialization potential of the rare ginsenosides 20 (S)-Rg3, 20 (R)-Rg3, Rk1 and Rg5.

The invention belongs to the technical field of chemical preparation of nano-porous materials, and relates to core-shell type porous silicon dioxide microspheres, a preparation method thereof and application of the core-shell type porous silicon dioxide microspheres in structural color. The preparation method comprises the following steps: (1) mixing absolute ethyl alcohol, ammonia water and deionized water to obtain alkaline hydrolysate; (2) mixing tetraethyl orthosilicate with organosilane to obtain a silane mixed solution; (3) simultaneously and respectively dropwise adding the alkaline hydrolysate and the silane mixed liquid into the silicon dioxide microsphere dispersion liquid under stirring, and reacting to obtain an intermediate; and (4) calcining the obtained intermediate at 550-650 DEG C to obtain the core-shell type porous silicon dioxide microspheres. The preparation method of the core-shell type porous silicon dioxide microspheres is simple, easy to operate and mild in condition. The raw materials are simple, easy to obtain, non-toxic and harmless, a surfactant and a template agent are not needed, and the cost is greatly reduced.

The invention relates to the field of biological product preparation, in particular to a preparation method of high-activity oyster-derived small molecule peptide. The method comprises the following steps: selecting fresh meat of pacific oysters or ostrea rivularis as a raw material, degreasing, adding water, crushing, filtering, sequentially carrying out compound protease and neutral protease hydrolysis, implanting a sensor and a probe in hydrolysis, monitoring in real time, and dynamically adjusting reaction conditions; adding a targeting microcapsule wrapping an ascorbic acid glutathione composite protective agent, and releasing the protective agent when a target peptide signal is detected; separating and concentrating through a gradient membrane, and purifying the target peptide by using a molecular imprinting chromatographic column; carrying out alkaline hydrolysis on enzymatic hydrolysis residues to prepare chitosan for cyclic utilization, carrying out enzymatic hydrolysis on residual residues to generate collagen peptide, treating and recycling wastewater, and recovering protease. According to the method, the technical effects that the high-activity and high-purity target peptide is prepared, the resource utilization rate is increased, the production cost is reduced, the target peptide has good oxidation resistance and biological activity, the intestinal enzyme degradation rate is reduced after glycosylation modification, and the blood half-life period is prolonged are achieved.

The invention discloses a vinylene carbonate production waste treatment method, which comprises: dispersing triethylamine hydrochloride waste residue in water, filtering, adding excess alkali into the filtrate to carry out an alkaline hydrolysis reaction, and standing for layering to obtain an oil phase and a water phase, the oil phase containing triethylamine; adding calcium peroxide into the water phase, mixing and stirring to obtain a pretreatment solution; performing electrochemical catalytic oxidation treatment on the pretreatment solution, wherein a graphite felt electrode modified by a specific iron-based activated carbon catalyst is used as a cathode in the electrochemical catalytic oxidation treatment; the method is simple to operate, easy to implement, high in continuity, low in cost, free of high-temperature and high-pressure processes and excellent in treatment effect.

The invention discloses a mixed rare earth concentrate treatment method. The treatment method comprises the following steps that mixed rare earth concentrate reacts with first hydrochloric acid, and chemical separation ore and chemical separation liquid are obtained; roasting the chemical ore to obtain roasted ore; carrying out primary alkaline hydrolysis reaction on the roasted ore and a first alkaline solution to obtain a primary alkaline hydrolysis product; washing the primary alkaline hydrolysis solid product with water to obtain an alkali cake I and alkali washing liquid I; sodium fluoride in the washing alkali liquid I is separated out, and sodium fluoride and residual alkali I are obtained; carrying out a secondary alkaline hydrolysis reaction on raw materials comprising a phosphorus-containing material and a second alkaline solution to obtain a secondary alkaline hydrolysis product; washing the secondary alkaline hydrolysis solid product with water to obtain an alkali cake II and an alkali washing solution II; and separating out trisodium phosphate in the alkali washing liquid II to obtain trisodium phosphate and residual alkali II. According to the method, the fluorine element and the phosphorus element in the mixed rare earth concentrate can be recycled respectively, and the purity of the obtained sodium fluoride and trisodium phosphate is high.

The invention discloses pediococcus acidilactici QM70-3 and application thereof in preparation of rare ginsenoside through fermentation conversion, and belongs to the field of probiotic fermentation, the pediococcus acidilactici QM70-3 is preserved in China Center for Type Culture Collection on February 25, 2025, and the preservation number is CCTCC NO: M 2025298. According to the invention, ginsenoside Re is used as a raw material, and the rare ginsenosides Rg2, Rg6, F4 and Rh1 are prepared by fermentation and conversion of pediococcus acidilactici QM70-3 capable of producing beta-glucosidase at high yield. After fermentation, the ginsenoside monomer Re can be completely converted into Rg2, Rg6, F4 and Rh1, and the technology does not need to depend on processes such as alkaline hydrolysis, high temperature and high pressure, steam treatment and the like, and has the characteristics of mild conditions, environmental friendliness, outstanding economical efficiency and the like. The invention provides a new way for the preparation of rare ginsenosides Rg2, Rg6, F4 and Rh1, and has a better application prospect.

The invention belongs to the technical field of fine chemical engineering, and particularly relates to a method for preparing L-aminopropanol by splitting DL-aminopropanol. The resolution method comprises the following steps: (1) preparing immobilized CALB lipase; (2) preparing a bimetallic catalyst; (3) performing transesterification with vinyl acetate under the action of a bimetallic catalyst and the immobilized CALB lipase; and (4) carrying out alkaline hydrolysis reaction with sodium hydroxide, and then carrying out post-treatment to obtain the L-aminopropanol. According to the method for preparing the L-aminopropanol by splitting the DL-aminopropanol, all the steps have a synergistic effect, and it is ensured that the prepared L-aminopropanol has the high yield and purity.

The process for producing and using polymeric Hydrocells for production of atmospheric water using a superabsorbent polymer derived from alkaline hydrolysis of the polyacrylonitrile (PAN). The Hydrocell adsorbs up to 80% of its weight in atmospheric water under ambient conditions and releases this water when heated to less than 100° C. using renewable energy sources, such as solar energy. This low-temperature operation allows for repeated adsorption and desorption cycles lasting years without degradation. Multiple Hydrocells can be arranged into Hydrobatteries with a surface area greater than 2 m2, capable of adsorbing several kg of water per day. The Hydrocells offer a sustainable and safe solution for producing potable water free of toxic chemicals and pathogenic microorganisms in regions with limited water resources. By drawing water from the vast atmospheric reservoir containing over 13,000 km3, this can help prevent deaths caused by the consumption of contaminated water.

The present application relates to a kind of high efficiency energy-saving preparation process of phloroglucinol.The preparation process uses phenol as raw material, generates 2,6-dichlorophenol and dichlorophenol isomer through chlorination reaction, then is alkaline hydrolysis and acidification into product phloroglucinol, after the intermediate dichlorophenol is generated in the chlorination reaction of raw material phenol, it is not concentrated and separated, directly add base to carry out alkaline hydrolysis reaction, realize chlorination-alkaline hydrolysis two-step reaction continuous production.The present application uses alkaline hydrolysis reaction to also convert the original dichlorophenol isomer impurity in situ into product phloroglucinol, realizes waste to treasure, improves yield about 8-10%;In the preparation process, 2,6-dichlorophenol intermediate is not separated, it is directly used in the next step alkaline hydrolysis reaction, the operation unit such as the solvent, crystallization, centrifugation, drying, packaging etc. for its concentration replacement is saved, at the same time, the pungent odor generated in the large production process of 2,6-dichlorophenol is fundamentally avoided, and the environmental pollution problem in the production process of phloroglucinol is avoided.

The utility model discloses a device for preparing an organic water-soluble fertilizer from kitchen waste pressure filtrate. The device comprises an oil-water separator, an alkaline hydrolysis tank, an acidolysis tank, a mixing and regulating tank and a centrifugal machine, the oil-water separator is used for carrying out grease separation on the injected kitchen waste pressure filtrate and respectively introducing the filtrate into the alkaline hydrolysis tank and the acidolysis tank; alkali liquor is added into the alkaline hydrolysis tank and is used for treating residual grease, protein and colloidal protein in the filtrate; acid liquor is added into the acidolysis tank and is used for treating starch and cellulose in the filtrate; the mixing and regulating tank is used for mixing the alkaline hydrolysis filtrate and the acidolysis filtrate separated in the alkaline hydrolysis tank and the acidolysis tank and regulating the pH value; the centrifugal machine is used for centrifuging the mixed solution and carrying out solid-liquid separation to obtain the supernatant organic water-soluble fertilizer. According to the kitchen waste pressure filtrate treatment device formed by the structural combination, the purpose of preparing organic water-soluble fertilizer by using kitchen waste as raw materials can be achieved, and the resource utilization rate and the economic value of kitchen waste pressure filtrate are effectively improved.

The utility model relates to excess activated sludge peroxy alkaline hydrolysis treatment equipment for sewage treatment, which belongs to the technical field of sewage treatment and comprises a sewage pool and an activated sludge sewage treatment system. A sewage lifting pump communicated with the sewage tank and the activated sludge sewage treatment system through pipelines is arranged between the sewage tank and the activated sludge sewage treatment system, and a sewage regulating tank is arranged between the sewage lifting pump and the sewage tank; a plurality of peroxy alkaline hydrolysis tanks which are communicated through parallel pipelines are arranged between the activated sludge sewage treatment system and the sewage adjusting tank, and alkaline hydrolysis sludge pumps are arranged between the peroxy alkaline hydrolysis tanks and the sewage adjusting tank. The device has the characteristics of simplicity and convenience in operation control, flexibility in operation, energy conservation, environment friendliness and simple structure, and is convenient for continuous production. The low-cost, harmless and reduction treatment on the sludge is realized.

The invention relates to a compound as well as a preparation method and application thereof. The preparation method comprises the following steps: taking a compound 1 as an initial raw material, and sequentially carrying out condensation with thiourea, alkaline hydrolysis and oxidative coupling with pentafluoropentanethiol to obtain the compound 1, the raw materials are easy to obtain, the reaction conditions are mild, the post-treatment process is effectively simplified through an optimized pulping purification technology, the purity of the final product is up to 98.5% or above, and the method is suitable for industrial production. And a key material basis is provided for quality research of fulvestrant bulk drugs.

The application discloses a method for preparing polyaniline with nanotube structure by using an alkaline hydrolysis product of perylene imide as a template agent, and comprises the following steps: preparing perylene imide, preparing the alkaline hydrolysis product of perylene imide, and preparing polyaniline. The perylene imide is a product synthesized by using perylene-3,4,9,10-tetracarboxylic dianhydride and 2,4-diamino-6-phenyl-1,3,5-triazine as raw materials. After the perylene imide is subjected to alkaline hydrolysis treatment, on one hand, the hydrophilicity of the perylene imide can be increased, so that the perylene imide can be fully infiltrated by an aniline solution, and the oxidation polymerization process of the aniline on the perylene imide is promoted; on the other hand, the surface of the polyimide after the alkaline treatment carries a large number of -OH nucleation sites regularly distributed along the molecular axis, so that the polyaniline grown on the polyimide presents a regular micro-nano structure.

The invention provides a method for preparing micromolecular glucosamine peptide by utilizing leftover materials of aquatic products. The method comprises the following three steps: firstly, treating raw materials through alkaline hydrolysis, and removing impurities; secondly, chitinase, deacetylase and collagenase are added at a certain temperature for enzymolysis, and the raw materials are converted into micromolecular collagen peptide; and finally, carrying out activated carbon adsorption, ultrafiltration membrane filtration and heating evaporation concentration to obtain a high-purity glucosamine peptide solution. The method is efficient, environment-friendly and low in cost, waste generated in the aquatic product processing process can be fully utilized and converted into micromolecular amino glycopeptides with commercial value, cyclic utilization of resources is promoted, and the method has high sustainable development significance and wide industrial application prospects.

The utility model discloses an automatic feeding device for residue treatment. The automatic feeding device comprises a rack, a feeding and conveying device and an alkaline hydrolysis kettle device, the feeding and conveying device comprises a feeding hopper and at least one auger conveying device, the feeding hopper is provided with a feeding channel, at least one first outlet is formed in the bottom of the feeding hopper, and the feeding channel is communicated with the first outlet; an anti-blocking device suitable for preventing residue blocking is arranged in the feeding channel; the auger conveying device comprises an auger rack, a rotating motor and a conveying screw rod, a conveying channel is formed in the auger rack, the first outlet is communicated with the conveying channel, the rotating motor is installed on the auger rack, the movable end of the rotating motor is connected with the conveying screw rod, and the movable end of the rotating motor is connected with the conveying screw rod. The conveying screw rod is rotationally arranged in the conveying channel, and a second outlet is further formed in the auger rack; the feeding device can well convey residues into the alkaline hydrolysis kettle, can effectively prevent raw materials from being blocked, and improves the feeding efficiency.

The invention provides nano asparagus microcrystalline cellulose as well as a preparation method and application thereof, and belongs to the technical field of food processing. The method comprises the following steps: drying old asparagus stems or asparagus straws by a microwave heat pump, rehydrating, and then carrying out steam explosion treatment to obtain crude fibers; carrying out alkaline hydrolysis, acidolysis and decoloration treatment on the crude fibers to obtain hydrolysate, mixing the hydrolysate with cellulase, and carrying out magnetic induction electric field assisted extraction to obtain an extracting solution; performing acidolysis treatment on the extracting solution, filtering to obtain a solid hydrolysate, washing the solid hydrolysate, and drying to obtain the nano asparagus microcrystalline cellulose. The nano asparagus microcrystalline cellulose prepared by extracting dietary fibers from asparagus byproducts (asparagus straws or old stems) is high in yield and purity and good in quality, and the stability of the milk tea can be remarkably improved by adding the prepared microcrystalline cellulose into the milk tea.

The invention provides a cellulose degrading strain for degrading traditional Chinese medicine residues, a microbial agent and a method for degrading the traditional Chinese medicine residues, and relates to the technical field of microorganisms. The invention provides a cellulose degrading strain for degrading traditional Chinese medicine residues, which comprises Cellulomonas X-5 with the preservation number of CGMCC (China General Microbiological Culture Collection Center) No.34614, and Cellulomonas X-5 with the preservation number of CGMCC No.34614; the preservation number of the cellulomicrobacterium X-7 is CGMCC (China General Microbiological Culture Collection Center) No.34615 According to the research and verification of the application, both the cellulomonas X-5 and the cellulomicrobacterium X-7 have good fiber degradation activity, especially for multi-medicinal material mixed traditional Chinese medicine residues, the decomposition rate of the traditional Chinese medicine residues can be remarkably improved, and meanwhile, the contents of quick-acting phosphorus and alkali-hydrolyzable nitrogen in the degraded traditional Chinese medicine residues can also be improved. Therefore, the cellulose degrading strain obtained in the invention not only is helpful for realizing resource utilization of agricultural wastes, but also can effectively improve the soil fertility and reduce the risk of environmental pollution.

The invention relates to the technical field of organic synthesis, in particular to a refining method of a crude product of dextroborneol, which comprises the following steps: sequentially carrying out a rearrangement reaction, an esterification reaction, a salt forming reaction, an alkaline hydrolysis reaction and post-treatment refining on the crude product of dextroborneol in the presence of a solvent and a catalyst on the basis of a reaction product to obtain a refined product of dextroborneol, in the refined dextroborneol product, the content of dextroborneol is greater than or equal to 98.0%, the content of L-borneol is less than or equal to 1.0%, the content of isoborneol is less than or equal to 0.15%, the content of natural camphor is less than or equal to 0.15%, and the content of other impurities is less than or equal to 0.10%. The method has the advantages that the isoborneol structure can be selectively destroyed under mild conditions, impurities are effectively removed through the esterification-salification-alkaline hydrolysis three-step reaction, and the purity and yield of dextroborneol are remarkably improved.

A method for producing superabsorbent polymers from polyacrylonitrile (PAN) virgin or recycled from acrylic fibre manufacturing waste and discarded fabrics subjecting the PAN to alkaline hydrolysis with pressurized water vapour of up to 5 kgf / cm2 and a PAN:OH− molar ratio of 1:0.5 to 0.95, to obtain a cross-linked poly(acrylic acid-co-acrylamide) salt without using mechanical agitation, graphitizing agents with starch or cross-linking agents, and without precipitating the superabsorbent polymer obtained from the reaction medium with solvents or through pH adjustment with acids, the polymer obtained with recycled PAN leaves the autoclave already having a moisture content of 20% to 35% and a swelling capacity of >150 g H2O / g.

This application relates to the field of pesticide intermediate synthesis technology, specifically disclosing a method for synthesizing 2-methylsulfonyl-4-trifluoromethylbenzoic acid. The method for synthesizing 2-methylsulfonyl-4-trifluoromethylbenzoic acid includes the following steps: 1) subjecting 2-nitro-4-trifluoromethylbenzonitrile to a methylsulfonation reaction to obtain 2-methylthio-4-trifluoromethylbenzonitrile; 2) subjecting the 2-methylthio-4-trifluoromethylbenzonitrile obtained in step 1) to an oxidation reaction under the action of a catalyst to obtain 2-methylsulfonyl-4-trifluoromethylbenzonitrile; 3) subjecting the 2-methylsulfonyl-4-trifluoromethylbenzonitrile obtained in step 2) to an alkaline hydrolysis reaction, followed by an acidification reaction to obtain 2-methylsulfonyl-4-trifluoromethylbenzoic acid. The synthesis method of this application has the advantages of high reaction efficiency, few process steps, and high yield.

The invention discloses a method for recovering ethyl pyrimidinol from pirimiphos-methyl synthesis wastewater. The method comprises the following steps: sequentially carrying out primary extraction, alkaline hydrolysis, secondary extraction, decoloration, pH value adjustment to 6-7, reflux and cooling crystallization on the wastewater. According to the method disclosed by the invention, other organic matters in the wastewater can be effectively removed, the product quality is improved, the ethyl pyrimidinol with high purity and high yield can be obtained, the recovery rate is greater than 99%, the purity exceeds 99%, the water content is very low, the obtained ethyl pyrimidinol can be used as a raw material to be directly used for synthesizing a pirimiphos-methyl active compound, the utilization rate of the ethyl pyrimidinol is effectively improved, and the method is suitable for industrial production. The method has the advantages of simple process, convenience in operation, low recovery cost, mild reaction conditions, high recovery efficiency, high purity of recovered products, environment friendliness and the like, effectively solves the problem of stink of the ethyl pyrimidinol recovered by the original method, and obviously reduces the three-waste treatment cost by outsourcing or incineration treatment, and meanwhile, the method has the advantages of simple process, convenience in operation, low recovery cost, mild reaction conditions, high recovery efficiency, high purity of the recovered products, environment friendliness and the like.

The invention belongs to the technical field of mother liquor recovery, and particularly relates to a high-salinity wastewater mother liquor recycling device and process method. The process method comprises the following steps: S1, adding mother liquor into an alkaline hydrolysis kettle, then adding liquid potassium hydroxide, and carrying out alkaline hydrolysis reaction; the non-condensable gas enters an ammonia recovery tower, and dimethylamine and ammonia are recovered; s2, detecting the content of dimethylformamide and dimethylamine hydrochloride in the alkaline hydrolyzed material, and executing the step S3 after the content of dimethylformamide and dimethylamine hydrochloride is smaller than the set content; otherwise, continuously adding the liquid potassium hydroxide until the content is less than the set content; s3, after alkaline hydrolysis is completed, evaporating to remove ammonia / amine; and S4, feeding the ammonia / amine water saturated by adsorption to a dimethylamine rectifying tower recovery device, and separating to obtain liquid dimethylamine and ammonia water. According to the device, an alkaline hydrolysis kettle is connected with a condenser I, the condenser I is connected with an ammonia recovery tower, and the ammonia recovery tower is connected with a dimethylamine rectifying tower recovery device. According to the method, mother liquor recycling is realized, and the mother liquor recycling cost is reduced.

The invention discloses a method for treating polychlorinated nitrobenzene-containing wastewater by adopting calcium hydroxide alkaline hydrolysis. The method comprises the following steps: firstly, adding calcium hydroxide into wastewater containing polychlorinated nitrobenzene, carrying out hydrolysis reaction under stirring and temperature control conditions, carrying out nucleophilic substitution on activated chlorine substitution sites and nitro substitution sites in polychlorinated nitrobenzene molecules by utilizing hydroxyl ions to generate phenolic substances such as trinitrodichlorophenol and the like, and separating the phenolic substances to obtain the polychlorinated nitrobenzene-containing wastewater. Performing ultrasonic treatment on the first treatment liquid until the solution turns yellow and the chromaticity is not increased any more to obtain a first treatment liquid, and performing ultrasonic treatment, washing and filtering on the first treatment liquid to remove precipitated solids to obtain the treatment liquid. According to the method disclosed by the invention, the primary attenuation of the polychlorinated nitrobenzene-containing wastewater is realized, and the treatability of the wastewater is improved.

This invention discloses a phenylnaphthic acid derivative and its application in phosphorescent information encryption. The preparation method involves using 3,5-bis(ethoxycarbonyl)phenylboronic acid and methyl 6-bromo-2-naphthylcarboxylate as raw materials, and then performing a Suzuki coupling reaction under tetra(triphenylphosphine)palladium(O) catalysis to obtain the intermediate ethyl 2-(3,5-bis(ethoxycarbonyl)phenyl)-6-naphthylcarboxylate. This intermediate is then subjected to alkaline hydrolysis and acidification to obtain the target product, 2-(3,5-dicarboxyphenyl)-6-naphthylcarboxylic acid. This phosphorescent material has a simple preparation method, lower cost compared to noble metal phosphorescence systems, a simple guest synthesis method with high yield, and exhibits significant and stable phosphorescence effects. Furthermore, precise emission color control of high-performance doped thin films is achieved through the triplet-to-singlet Förster fluorescence resonance energy transfer (TS-FRET) mechanism, establishing a multicolor long-lifetime emission system. In addition, the material has multi-color adjustable properties and excellent long afterglow emission performance, showing great application potential in cutting-edge application fields such as multi-dimensional information encryption and high-end anti-counterfeiting.

The utility model discloses a device for treating DMAC (dimethylacetamide) wastewater, which comprises an alkaline hydrolysis reaction kettle, a feed port of the alkaline hydrolysis reaction kettle is respectively connected with an alkali storage tank and a wastewater storage tank, a discharge port of the alkaline hydrolysis reaction kettle is connected with a precipitation kettle, and a discharge port of the precipitation kettle is connected with a centrifugal machine. The DMAC wastewater treatment device is simple in structure, small in occupied area, low in energy consumption and low in equipment investment, DMAC wastewater is firstly subjected to alkaline hydrolysis treatment in the device and then subjected to precipitation treatment, the obtained wastewater treatment process is short, operation is easy, the treatment effect is good, the industrialization implementation difficulty is low, and the application value is high.

The utility model discloses a cross-linking agent TAIC (triallyl isocyanurate) production wastewater treatment device, which relates to the technical field of industrial wastewater treatment and comprises a high-temperature alkaline hydrolysis unit, an evaporation unit, an SBR (sequencing batch reactor) biochemical unit, an A / O (anaerobic / oxic) biochemical unit and a deep oxidation unit. The utility model also discloses a method for treating the cross-linking agent TAIC production wastewater by using the device, the production wastewater enters the high-temperature alkaline hydrolysis unit after the pH value of the production wastewater is adjusted, a reaction is carried out under a strong alkaline condition, the high-temperature alkaline hydrolysis effluent is adjusted to be weak acid and then is introduced into the evaporator, and the evaporation condensate is treated by adopting an SBR-A / O biochemical treatment process, so that the production wastewater is obtained. The biochemical effluent is deeply oxidized, so that the discharged water meets the nano-tube discharge standard.

The invention discloses a method for synthesizing high-content clethodim and an intermediate thereof, and particularly relates to the field of pesticide synthesis, and the method comprises the following steps: S1, taking a toluene solution of a rearrangement compound A, sequentially adding a certain amount of an alcohol proton solvent and a solid inorganic base, then adding a certain amount of sodium alkoxide, carrying out a heat preservation reaction until the reaction is complete, cooling and filtering to obtain a reaction solution; washing the filter cake with a certain amount of toluene to obtain a compound B; in the alkaline hydrolysis process of the rearrangement compound, the introduction of water is avoided through an alcohol protic solvent system, the solvent can be recycled, the generation of wastewater in the hydrolysis and decarboxylation process of the rearrangement compound is avoided, the purification process of the product is realized in a synchronous crystallization mode in the alkaline hydrolysis process, the purity of the obtained intermediate is up to 99% or above, and the product purity is up to 99% or above. According to the method, the subsequent purification process of propionyl triketone and clethodim is not needed, the yield loss caused by the processes of high-temperature distillation, acid-base extraction and the like is avoided, and the whole technological process is simple, conforms to the green and environment-friendly concept and is suitable for industrial production.