98results about How to "Increase acidity" patented technology

The invention discloses low-drunkenness type Baijiu distiller's yeast and a preparation method and application thereof. The prepared distiller's yeast can be used for producing baijiu, the physical and chemical indexes of the baijiu are good, fusel oil is reduced by 30%-57%, the metabolism speed of yeast is controlled by controlling the saccharification speed, and the generation of the fusel oil is reduced; meanwhile, lactic acid bacteria and bacillus subtilis of the distiller's yeast and bacteria cultured in a high-temperature stage can effectively inhibit the path of fusel oil metabolized by yeast, generation of fusel oil is further reduced, total ester and total acid are slightly increased basically, the content of total dibasic acid is increased by 10 times, and the content of dibasic acid diethyl ester is increased by 2 times. After the wine liquid is aged, drunkenness detection is carried out, and the comprehensive drunkenness Q is 0.6815-0.8325 and is far lower than a variety of commercially available white spirits (the comprehensive drunkenness is greater than or equal to 1).

The invention relates to the technical field of preparation of acid soil conditioners, in particular to a multifunctional acid soil conditioner and a preparation and application method thereof.The multifunctional acid soil conditioner is prepared from potassium feldspar, alkaline residues and a synergist according to the mass ratio of 1: (1.3-1.7): (1-2); the preparation method of the multifunctional acidic soil conditioner comprises the following steps: S1 ', pretreatment; S2', preparation of the soil conditioner. According to the application method, the soil conditioner is applied to the field. The novel high-activity multifunctional conditioner capable of improving acid and fertility is prepared by optimizing the material ratio and alkali heat activation conditions, the conditioner can effectively balance the content of alkaline substances and active nutrients such as potassium, calcium and magnesium, the content of effective state K, Ca and Mg of soil is remarkably increased while the soil acidity is improved, and synchronous improvement of the pH and fertility of the acid soil is achieved.

The invention discloses a preparation method of low-freezing-point dipropylene glycol, which comprises the following steps: carrying out condensation reaction on propylene oxide and propylene glycol by using a solid acid catalyst, and carrying out post-treatment to obtain the low-freezing-point dipropylene glycol. The sulfonic acid is loaded on the high-porosity inorganic nanoparticles, and the surface of the inorganic nanoparticles is modified with the crown ether in the form of a long cantilever, so that the preparation process of the dipropylene glycol is simplified, the dipropylene glycol with a low freezing point is obtained, the purity and the yield of the dipropylene glycol are improved, and the method is suitable for industrial production. And the solid acid catalyst still has good catalytic activity after being recycled for many times.

The invention belongs to the technical field of environmental functional materials, and discloses a sludge-based catalytic material as well as a preparation method and application thereof. The preparation method of the sludge-based catalytic material comprises the following steps: drying sludge to obtain sludge particles; mixing the sludge particles, EDTA (Ethylene Diamine Tetraacetic Acid), citric acid and water, and reacting to obtain modified sludge particles; mixing the modified sludge with a phosphomolybdic acid solution, and performing pyrolysis to obtain the sludge-based catalytic material. According to the invention, the EDTA and the citric acid are adopted to modify the sludge, metals in the sludge are distributed on the surface of the material in the subsequent pyrolysis process, and the citric acid also has a pore-forming effect to increase the specific surface area of the material and improve the adsorption capacity to pollutants; the sludge is modified by adopting phosphomolybdic acid, and abundant oxygen-containing functional groups are introduced to the surface of sludge carbon, so that the adsorption capacity and the catalytic degradation capacity of the sludge-based catalytic material are improved, and the sludge-based catalytic material has good catalytic performance.

The invention belongs to the technical field of carbon dioxide capture, and particularly relates to a supported catalyst, a preparation method and application thereof, and an organic amine solution regeneration method. The supported catalyst provided by the invention comprises gamma-Al2O3 and Zr and M metals loaded on the surface and in pore channels of the gamma-Al2O3, and the M metals comprise Fe, Ni, Cu or Ce. According to the supported catalyst provided by the invention, gamma-Al2O3 is taken as a carrier, so that the supported catalyst is endowed with a mesoporous structure, and more effective contact is provided for catalytic active sites and reactants; zr and M metals are used as active components to form the bimetallic supported solid acid catalyst; the synergistic effect of double metals endows the supported catalyst with stronger acidity and higher content of Bronsted and Lewis acid sites. The supported catalyst is used for catalyzing and desorbing the CO2-rich organic amine solution, so that the CO2-rich organic amine solution can be desorbed at a relatively low temperature, and the regeneration cost is reduced.

The invention discloses a fermented tea drink capable of protecting gastric mucosa and a preparation method thereof, and the preparation method comprises the following steps: S1, adding tea leaves into distilled water, heating to boiling, preserving heat, and cooling to room temperature to obtain tea soup; s2, uniformly mixing radix puerariae, poria cocos and lily bulbs, then performing freeze crushing, then adding the crushed materials into deionized water, then adding cellulase and pectinase, performing enzymolysis, and after enzymolysis is completed, performing enzyme deactivation, extraction, filtration and concentration so as to obtain a plant extracting solution; s3, adding a carbon source, a plant extract, pomegranate juice and polyglycerol fatty acid ester into the tea soup, uniformly stirring and mixing, and sterilizing to obtain a fermentation substrate; and S4, inoculating the mixed bacteria into a fermentation substrate, then performing fermentation, and after fermentation is completed, performing filtration and sterilization to obtain the fermented tea drink. The fermented tea drink has good stability, flavor and taste, also has the efficacy of assisting in protecting gastric mucosa, promotes intestinal health, and has a good application prospect.

The invention belongs to the technical field of biological medicines, and particularly relates to a gadolinium-based sulfonamide complex with a radiotherapy sensitization effect as well as preparation and application of the gadolinium-based sulfonamide complex. The preparation method comprises the following steps: dispersing sulfonamides and PVP in a mixed solution of ethanol and ethylene glycol, and stirring at room temperature to obtain a reaction solution A; dropwise adding Gd (NO3) 3.6 H2O into the reaction solution A, and continuously stirring to obtain a reaction solution B; and carrying out solvothermal reaction on the reaction solution B to obtain the gadolinium-based sulfonamide complex. The gadolinium-based sulfonamide complex prepared by the invention can increase the radiotherapy sensitivity by adjusting the tumor acidic microenvironment. Experiments prove that the gadolinium-based sulfonamide complex can effectively enhance the radiotherapy treatment effect, promote tumor cell apoptosis and slow down the tumor growth speed when being used in cooperation with radiotherapy.

The present invention relates to the technical field of capacitors, and in particular to an electrolyte for aluminum electrolytic capacitors, an aluminum electrolytic capacitor and a preparation method thereof. The aluminum electrolytic capacitor is composed of an anode aluminum foil, an electrolytic paper, a cathode aluminum foil and an electrolyte; wherein the electrolyte comprises the following raw materials in parts by weight: 60 to 90 parts of a solvent, 1 to 5 parts of a modified polycarboxylic acid, 5 to 20 parts of an organic carboxylic acid ammonium salt, 1 to 4 parts of an inhibitor, 2 to 15 parts of a flash voltage enhancer and 1 to 3 parts of a hydrogen absorber. The present invention also provides a preparation method thereof. Compared with the prior art, the aluminum electrolytic capacitor prepared by the present invention has a higher electrostatic capacitance and good corrosion resistance, and also exhibits excellent low temperature performance.

This invention relates to the field of broad bean paste technology and discloses a low-salt broad bean paste production process based on the synergistic fermentation of compound microorganisms. The process includes: uniformly mixing broad bean koji with drained chili embryos to obtain a solid mixture; spraying an A-phase initiation conditioning solution onto the solid mixture and inoculating it with *Lactobacillus plantarum*, mixing until moistened to obtain a primary fermentation mash; controlling the primary fermentation mash to undergo constant-temperature fermentation until the pH value drops to a preset acidic range to obtain an acidified mature mash; injecting a B-phase hypertonic regulating solution into the acidified mature mash and inoculating it with *Tetracoccus halophilus* and *Zygosacchariformis*, mixing uniformly to obtain a phase-inversion fermentation mash; cooling the phase-inversion fermentation mash and conducting anaerobic fermentation under air-isolated conditions to obtain the low-salt broad bean paste product. This invention solves the problems of insufficient umami and softening in low-salt fermentation by segmented salt control driving synergistic succession of microorganisms, combined with chemical regulation to protect enzyme activity and enhance texture, significantly improving the flavor and taste of the product.

The present invention relates to the field of catalyst technology, and in particular to a method for synthesizing 2,5-dimethyl-2,4-hexadiene from isobutyraldehyde catalyzed by phosphoric acid-modified Zn / HZSM-5, with isobutylene (IB) / isobutyraldehyde (IBA) as reactants, and a Prince condensation reaction is carried out under the conditions of a phosphoric acid-modified Zn-loaded HZSM-5 molecular sieve catalyst to obtain the obtained product. The invention has the advantages that the process is simple, the energy consumption is low, the safety is high, the cost is low, the pollution is small, and large-scale production is possible; the prepared product 2,5-dimethyl-2,4-hexadiene content can reach 60%, which meets the requirements of industrial products; the reaction specificity is strong, there are no other by-products except water, the catalyst is easy to separate, can be reused, and is environmentally friendly and energy-saving.

The invention belongs to the field of sour bamboo shoots, and discloses a preparation method of high-acid low-salt dendrocalamus latiflorus, which comprises the following steps: step 1, cutting dendrocalamus latiflorus into strips, blanching, sterilizing, adding into a high-salt soaking solution, inoculating with a first compound bacteria solution, and carrying out anaerobic fermentation for 3-6 days; step 2, emptying the liquid in the step 1, supplementing a low-salt soaking solution, inoculating a second compound bacteria solution, and carrying out anaerobic fermentation for 3-10 days; the high-salt soaking solution contains 5-10 wt% of sodium chloride; the low-salt soaking solution contains 1-2wt% of sodium chloride. According to the method, a secondary fermentation technology is adopted, different commercial strains are used for fermentation under high-salt and low-salt conditions, debitterizing is carried out under the high-salt condition, flavor enhancement is carried out under the low-salt condition, and the sour bamboo shoots which are free of bitter taste and odor, high in acidity and good in flavor are obtained. Meanwhile, the invention further provides the sour bamboo shoots obtained based on the method.

The present invention relates to the technical field of catalyst preparation, and specifically to a preparation method and application of an ultra-low temperature denitration catalyst. The preparation method of the ultra-low temperature denitration catalyst comprises the following steps: (1) adding a molybdenum salt and a complexing agent to pure water, heating and stirring, dissolving the molybdenum salt completely, obtaining a molybdenum complex solution, and then roasting to obtain modified molybdenum oxide; (2) adding a vanadium salt and a complexing agent to pure water, heating and stirring, dissolving the vanadium salt completely, cooling, and obtaining a vanadium complex solution; (3) adding titanium dioxide and modified molybdenum oxide to the vanadium complex solution, stirring evenly, drying, and roasting to obtain an ultra-low temperature denitration catalyst. The present invention improves the denitration performance of the denitration catalyst at ultra-low temperatures, while reducing SO 2 / SO 3 Conversion rate.

This invention discloses a USY molecular sieve, its preparation, and its application. The USY molecular sieve has the following properties: mesoporous pore volume accounts for 30%–60% of the total pore volume; the total acid content is 400–480 μmol / g at 200℃ and 120–150 μmol / g at 350℃. When the molecular sieve of this invention is used as a hydrocracking catalyst, both the catalyst activity and selectivity are significantly improved.

This invention discloses a strain of *Pediococcus pentosaceus* RL-10 and its application in bio-acidification rice soaking and bacterial cellulose production, belonging to the field of microbial technology. The preservation number of *Pediococcus pentosaceus* RL-10 is CCTCC NO: M 20252428. This invention is the first to use *Pediococcus pentosaceus* as a strain for bio-acidification rice soaking. Using rice soaking water as a production substrate, *Acetobacter Hansenulatus* and strain RL-10 are co-cultured in situ to produce bacterial cellulose loaded with antimicrobial peptides. Under certain process conditions, acidification of rice soaking by strain RL-10 can rapidly increase acidity and shorten soaking time. The bacterial cellulose production process of this invention is simple and low-cost; verification shows that the bacterial cellulose prepared by the method of this invention has high yield and good antibacterial activity, meeting the requirements of large-scale industrial production.

A trichloroisocyanuric acid mother liquor chlorine recovery system comprises a mother liquor tank and a hydrochloric acid tank, the mother liquor tank is communicated with the bottom of a dechlorination tank through a pump body and a pipeline, the hydrochloric acid tank is communicated with the top of a dechlorination tower through a pump body and a pipeline, and the bottom of the dechlorination tower is communicated with the top of the dechlorination tank. The dechlorination tank is also communicated with the top of the dechlorination tower through a pump body and a pipeline, and the top of the dechlorination tower is also communicated with chlorine recovery equipment. By optimizing the structure, the trichloroisocyanuric acid mother liquor chlorine gas recycling system is formed, the acidity of the mother liquor is increased, the air volume of the blow-off tower is reduced, the air content in the blown chlorine gas is reduced, the recycled chlorine gas is used for producing a sodium monochloroisocyanate intermediate, and the recycling is ensured.

The present invention relates to a bacterial agent for degrading isoproturon and a preparation method thereof. The bacterial agent uses wheat biochar as a carrier and carries Sphingomonas spp. Sphingobium sp . Made from IPU-1 bacteria; Sphingomonas spp. in the bacterial agent Sphingobium sp. The wet bacterial content of IPU‑1 is 20 g / L and the biochar content is 20 mg / mL; the bacterial agent is in the form of black powder with a rough surface, many pores, good adsorption effect and good permeability. Sphingobium sp. ) IPU‑1 bacteria has a good degradation effect on isoproturon. Free bacteria are easily lost in the environment and have poor environmental adaptability. Therefore, the adsorption and fixation of wheat straw biochar into a bacterial agent is actually applied to the field of isoproturon bioremediation technology, which has great bioremediation significance and economic benefits.

The application discloses a preparation method of oat plant-based fermented milk rich in polyphenols based on a combined enzymolysis-fermentation technology. The preparation method comprises the following steps: after oat is soaked and cleaned, the oat is dried to obtain pretreated oat; the pretreated oat is baked and crushed, and then ball milled to obtain oat ultrafine powder; then, water is added to the oat ultrafine powder to obtain oat milk, the oat milk is stirred and subjected to high-speed shearing, the oat milk is completely dissolved and then gelatinized, and then enzyme is added to perform enzymolysis to obtain an enzymolysis solution; after the enzyme is inactivated, the enzymolysis solution is mixed and homogenized to obtain a homogenized solution, the homogenized solution is sterilized and cooled to obtain a uniform and stable system; finally, a strain is inoculated into the uniform and stable system to perform fermentation and post-ripening to obtain oat plant-based fermented milk. According to the preparation method, a nitrogen source does not need to be additionally added, the polyphenol content of the system and the acidity of the product can be effectively improved, and the fermentation time is shortened.

The invention provides a clear and strong flavor type white spirit and a brewing method thereof. The brewing method of the clear and strong flavor type white spirit comprises the following steps: adding grain flour into long-fermentation-period strong flavor type fermented grains for moistening grains, adding steamed rice husks, and distilling to obtain strong flavor type distillers' grains and strong flavor type raw wine I; distilling the Sichuan fen-flavor fermented grains to obtain fen-flavor distillers' grains and fen-flavor raw wine II; the strong-flavor vinasse is subjected to acid brewing, out-of-steamer, water metering, airing and cooling, and wine brewing koji is added for heap fermentation; cooling the fen-flavor distillers' grains and adding wine brewing yeast; mixing the strong-flavor distillers' grains subjected to stacking fermentation with the fen-flavor distillers' grains added with the wine brewing yeast, and fermenting in a cellar; and distilling the fermented mixed distillers' grains to obtain the wine, thereby obtaining the clear and strong flavor type raw wine III. The Sichuan-style fen-flavor vinasse can partially replace rice husks, the brewing cost is reduced, the alcohol cleanliness of a wine body is increased, the problem that fusel oil is high when the Sichuan-style fen-flavor vinasse is independently produced is solved, and the problem that long-fermentation strong-flavor vinasse is difficult to produce wine is also solved.

The invention provides a device capable of automatically detecting and adjusting the acidity of a glutinous rice wine body, which comprises a dissolving box, a first conveyor is mounted on the left side of the dissolving box, a first stirrer is mounted in the dissolving box, a salt box is connected to one side of the first conveyor, a second conveyor is mounted on the right side of the top of the dissolving box, and a second stirrer is mounted in the second conveyor. One side of the second conveyor is connected with a water tank, one side of the dissolving tank is connected with a third conveyor, one side of the third conveyor is connected with an ammonia tank, and the right side of the surface of the dissolving tank is connected with a fourth conveyor. According to the method for automatically detecting and adjusting the acidity of the glutinous rice wine body, the device realizes accurate and automatic adjustment of the acidity of the wine liquid, wine liquid acidity data can be obtained in real time through an online acidity detection system, and the online preparation yield of sodium bicarbonate is accurately set according to the data; and acidity adjustment errors caused by sampling lag and inaccurate metering in a traditional manual adjustment mode are avoided.

This invention belongs to the field of electrode material technology, specifically relating to an anode foil, its preparation method, and an aluminum electrolytic capacitor. The preparation method of the anode foil includes performing a secondary porosimetry etching on the aluminum foil after primary porosimetry etching. The secondary porosimetry etching includes multiple stages of porosimetry etching, with a mid-treatment process between each adjacent stage. This preparation method involves multiple stages of porosimetry etching, and the mid-treatment process between each adjacent stage effectively increases the pore size of the etched foil, making it suitable for preparing ultra-high voltage anode foils with low loss and high specific capacitance.

This invention discloses a synthesis process for methylal, belonging to the field of methylal technology, comprising the following steps: In a reactor, formaldehyde and methanol are reacted at a molar ratio of 1:1.5-4.5 under the action of an organic-inorganic composite solid acid catalyst at 50-75°C for 40-240 min, with the reflux ratio controlled at 1-4:1, and the fraction collected at 40-46°C from the top of the column to obtain industrial-grade methylal product; the organic-inorganic composite solid acid catalyst is phosphotungstic acid supported on multi-component mesoporous microspheres grafted with sulfonic acid-based acrylamide. The methylal synthesis process provided by this invention uses an organic-inorganic composite solid acid catalyst to synthesize industrial-grade methylal. This organic-inorganic composite solid acid catalyst is easy to separate from the product, has low corrosiveness to equipment, high catalytic effect, wear resistance, and good recyclability, making it a novel, efficient, green, and environmentally friendly production method.

The invention discloses a nickel-loaded hierarchical porous SAPO-34 catalyst and a preparation method and application thereof.The method comprises the steps that an aluminum source is added into a water solution of a phosphorus source, stirring is conducted, then a template agent and a silicon source are added, stirring and uniform mixing are conducted, and a precursor solution is prepared; carrying out hydrothermal reaction treatment on the precursor solution, and calcining a product to prepare an original SAPO-34 carrier; the preparation method comprises the following steps: putting an original SAPO-34 carrier into an organic acid solution, stirring, and drying and calcining to obtain an acid-treated SAPO-34 carrier; and adding the SAPO-34 carrier subjected to acid treatment into a Ni (NO3) 2 solution, fully stirring and uniformly mixing, drying, and carrying out heat treatment to obtain the nickel-loaded hierarchical porous SAPO-34 catalyst. The method is simple in process and reasonable in design, the catalyst has an excellent hierarchical porous structure and appropriate surface acidity, the reaction activity and selectivity of the catalyst are effectively improved, and the reaction energy efficiency is effectively improved.

The invention relates to the technical field of flue gas treatment, and provides a high-capacity chlorinated hydrocarbon adsorbent as well as a preparation method and application thereof, the structural formula of the adsorbent is FexCuy-MOFs, and the atomic ratio x: y of Fe / Cu is 1: (4-19). According to the invention, the coupling effect of double metal ions (Fe < 3 + > and Cu < 2 + >) is utilized, so that the acidity of the adsorbent is moderate, and the attraction effect on chloride ions in chlorinated hydrocarbon is enhanced, so that the adsorption capacity on chlorinated hydrocarbon is increased; wherein the adsorption capacity to CH3Cl is 102.36 mmoL / g, the adsorption capacity to CH2Cl2 is 36.43 mmoL / g, the adsorption capacity to CHCl3 is 15.16 mmoL / g, the adsorption capacity to vinyl chloride is 10.68 mmoL / g, the adsorption capacity is greatly improved, and the industrial application value is very high.

The invention relates to the technical field of fault diagnosis data processing, and discloses a hoist operation fault diagnosis system and method based on artificial intelligence, and the system comprises a hoist hydraulic oil characteristic parameter obtaining module, a hoist hydraulic oil characteristic parameter state analysis module, and a hoist fault state diagnosis output module. The characteristic state parameters of hydraulic oil in the fault state of the hoist are compared with the characteristic state parameters of acidity, viscosity and water content of the hydraulic oil through an artificial intelligence recognition algorithm, the operation fault state of the hydraulic hoist is accurately diagnosed, and efficient and accurate online monitoring of the operation state of the hydraulic hoist is achieved. And the fault state diagnosis result of the hoist is pushed to the hoist fault monitoring end on line through the Internet of Things and is fed back and displayed through a display screen, so that the real-time visual feedback of the operation state diagnosis result of the hydraulic hoist is realized, and the real-time and scientific feedback of the operation fault of the hydraulic hoist is improved.

This invention provides a supported noble metal catalyst, its preparation method, and its application, belonging to the field of industrial flue gas catalytic purification technology. The supported noble metal catalyst provided by this invention includes a cordierite support and a platinum catalyst bonded to the surface and pores of the cordierite support by a binder. The platinum catalyst includes a support and an active component and an active agent supported on the surface of the support. The active component is elemental Pt and Pt oxides; the active agent is one or more of tungsten oxide, molybdenum oxide, and vanadium oxide. The supported noble metal catalyst provided by this invention exhibits excellent sulfur and water resistance, is not easily deactivated, and has high catalytic efficiency.

The invention discloses a silicon-aluminum material and a preparation method thereof. After being roasted at 500-700 DEG C, the silicon-aluminum material has the following properties: the content of silicon dioxide is 20-75wt%, and the pore volume is 0.70-1.5 mL / g; and the specific surface area is 280-400 m < 2 > / g. The preparation method of the silicon-aluminum material comprises the following steps: (1) uniformly mixing a silicon-containing compound A, an auxiliary agent A, an aluminum-containing compound and water to obtain a material flow A; (2) carrying out heat treatment on the material flow A in the presence of organic amine to obtain a material flow B; (3) uniformly mixing a silicon-containing compound B, an acidic aluminum-containing compound, an alkaline aluminum-containing compound and water, and treating to obtain a material flow C; (4) mixing the material flow C with an auxiliary agent B to obtain a material flow D; and (5) mixing the material flow B and the material flow D, carrying out hydrothermal treatment, and then washing, drying and roasting to obtain the silicon-aluminum material. The provided silicon-aluminum material shows certain molecular sieve characteristics, has the characteristics of high B acid content and stepped pore channel distribution, and is especially suitable for being used as a carrier of a hydrogenation catalyst.

The invention relates to the technical field of food health care, and discloses a spleen tonifying medicine for treating greasy dyspepsia, the formula comprises the following components: 20 g of hawthorn, 10 g of endothelium corneum gigeriae galli, 20 g of lactic acid bacteria, 5 g of medicated leaven, 3 g of malt, 3 g of pericarpium citri reticulatae and 30 g of powdered sugar, the fresh hawthorn is selected and dried in the sun, the endothelium corneum gigeriae galli is peeled, cleaned, dried in the sun and ground into powder for use, the medicated leaven is scorched medicated leaven, and the powdered sugar is added into the dried endothelium corneum gigeriae galli. According to the formula disclosed by the invention, sourness is taken as a main ingredient, liver qi is astringed, the spleen is helped to raise yang, and body fluid is engendered to quench thirst, the hawthorn is used for promoting meat decomposition, the lactic acid bacteria are used for helping digestion, the endothelium corneum gigeriae galli can promote secretion of gastric juice and increase of acidity, and the motor function of the stomach is enhanced; the malt is used for digesting cereal food, and the dried orange peel is used for regulating qi and removing food stagnation, has a mild stimulation effect on digestive tracts, is beneficial to elimination of pneumatosis of the stomach and intestine and can promote gastric secretion, and the medicines are combined to achieve the effects of promoting digestion and removing greasiness.

The invention relates to the technical field of MOFs materials, in particular to a modified metal organic framework material and a preparation method and application thereof. The modified metal organic framework material comprises: a metal center; and at least two organic ligands coordinated to the at least two binding sites of the metal center to form an at least partially crystalline network structure having a plurality of internal pores; wherein the modified metal organic framework material crystal is provided with a wrinkled outer surface, and the contact angle between the modified metal organic framework material and water is 40-120 degrees. The modified metal organic framework material is used for catalytically preparing an N-substituted pyrrole compound (such as a 2, 5-dimethyl-N-substituted pyrrole compound) and has the outstanding characteristics of high reaction efficiency, high product yield and the like.

The application provides a resolution method of clemastine fumarate intermediate, comprising the following steps: 1) reacting racemic N-methyl-2-(2-chloroethyl)pyrrolidine with a chiral resolving agent in a first organic solvent to obtain a diastereomeric salt solution; 2) purifying the material after the reaction in step 1) by cooling and crystallization, and filtering to obtain R-N-methyl-2-(2-chloroethyl)pyrrolidine resolving agent salt; 3) dissolving the R-N-methyl-2-(2-chloroethyl)pyrrolidine resolving agent salt obtained in step 2) in a second organic solvent-water two-phase system, adjusting the pH value to 9-13, then separating the organic phase, and concentrating to obtain R-N-methyl-2-(2-chloroethyl)pyrrolidine; wherein the chiral resolving agent is at least one selected from L-di(3,5-dinitrobenzoyl) tartaric acid and L-di-p-chlorobenzoyl tartaric acid. By using a specific chiral resolving agent, the resolution efficiency of racemic N-methyl-2-(2-chloroethyl)pyrrolidine is significantly improved, and combined with cooling and crystallization and two-phase acid adjustment replacement, the operation is simple, and the cost is controllable.

The invention relates to the technical field of fluorescent materials, and provides a preparation method of europium fluoride for a fluorescent material, and the preparation method comprises the following steps: mixing europium hydroxide and water, adding first ethoxymethyl propane alcohol, and continuously mixing to obtain europium hydroxide slurry; mixing the hydrofluoric acid solution with hydrochloric acid to obtain a mixed acid solution; after the mixed acid solution is heated, europium hydroxide slurry is added for a reaction, and europium fluoride synthetic liquid is obtained; rinsing the europium fluoride synthetic liquid, adjusting the pH value to 5-8, adding second ethoxymethyl propane alcohol to obtain europium fluoride spray liquid, and performing spray drying to obtain europium fluoride powder. Through the technical scheme, the problems that europium fluoride prepared in related technologies is relatively large in particle size and relatively low in purity, cannot be directly applied to a fluorescent material, needs to be subjected to airflow crushing or ball-milling crushing and then is used as the fluorescent material, and relatively many mechanical impurities are introduced in the crushing process, so that the fluorescent material cannot be directly applied to the fluorescent material are solved. The quality of the europium fluoride powder is not stable.