1529 results about "Ethanol" patented technology

The invention discloses a synthetic method of a water soluble ultraviolet light absorber BP-9. The method mainly comprises the following process steps: (1) carrying out methylation on the main raw materials of 2, 2', 4, 4'-tetrahydroxyl benzophenone, a transition metal salt catalyst and a mixed solvent which is prepared from dichloroethane and anhydrous ethanol in equal parts by weight to obtain 2, 2'-dihydroxyl-4, 4'-dimethoxyl benzophenone; (2) carrying out sulfonation reaction on the main raw materials of methylate, sulfamic acid and C1-C3 halohydrocarbon to obtain 2, 2'-dihydroxyl-4, 4'-dimethoxyl benzophenone-5, 5'-disulfonic acid; and (3) carrying out neutral reaction on the main raw materials of sulfonated product, inorganic base and ethanol water to finally obtain the BP-9 product. The synthetic method disclosed by the invention is few in reaction step, low in cost, high in product purity and stable in quality, and raw materials are easily available.

The invention belongs to the field of photocatalytic materials, and particularly relates to a high-entropy sulfide and a preparation method and application thereof. The high-entropy sulfide is granular, the molecular general formula is (MnaFebCocCudZe) xS, x is equal to 1, and the atomic ratio of Mn to Fe to Co to Cu to Zn is a: b: c: d: e of (1-2): (1-2): (1-2): (1-2): (1-2): (1-2): (1-2). The preparation method comprises the following steps: S1, dissolving metal salt in a mixed solvent of isopropanol and glycerol according to the atomic ratio of metal elements, and carrying out solvothermal reaction to obtain a precursor; and S2, dispersing the precursor in ethanol, adding thioacetamide as a sulfur source, and carrying out solvothermal reaction to obtain the high-entropy sulfide. The high-entropy sulfide disclosed by the invention is used as a photocatalytic material and shows excellent photocatalytic performance.

The invention discloses a large-aperture aluminum oxide loaded copper-based catalyst as well as preparation and application thereof. The large-aperture alumina-loaded copper-based catalyst comprises a large-aperture alumina carrier, and copper oxide and lanthanum oxide loaded on the surface of the large-aperture alumina carrier, the large-aperture alumina-loaded copper-based catalyst is granular, the specific surface area is 250-500 m < 2 > / g, the pore volume is 1.0-2.0 cm < 3 > / g, the average aperture is 16-30 nm, and the pore diameter of the large-aperture alumina-loaded copper-based catalyst is 20-30 nm. The large-aperture alumina supported copper-based catalyst comprises the following components in percentage by mass: 79%-98.9% of a large-aperture alumina carrier, 0.1%-6% of copper oxide and 1%-15% of lanthanum oxide. The large-aperture aluminum oxide loaded copper-based catalyst disclosed by the invention shows relatively high catalytic activity and higher alcohol selectivity in a reaction for preparing higher alcohol from ethanol, and particularly has relatively high C6-C10 fatty alcohol selectivity.

The invention belongs to the technical field of conductive adhesives, and particularly relates to a salt-fog-resistant waterborne conductive adhesive and a preparation method thereof.The salt-fog-resistant waterborne conductive adhesive is mainly prepared from, by weight, 5-10 parts of salt-fog-resistant waterborne polyurethane; 5 to 10 parts of water-based tackifying resin; 30 to 50 parts of conductive silver powder; 10 to 20 parts of ethanol; 2-10 parts of an anti-hydrolysis agent; and 10-30 parts of deionized water. According to the salt-fog-resistant aqueous conductive adhesive, polyurethane resin with polytetrahydrofuran alcohol and polycaprolactone polyol as main structures is used as matrix resin, a system is endowed with excellent water resistance and salt-fog resistance, the salt-fog-resistant aqueous conductive adhesive shows outstanding hydrolysis-resistant stability after being cured, and the salt-fog-resistant aqueous conductive adhesive and the conductive silver powder have a synergistic effect, so that the anti-settling performance is effectively improved.

The invention discloses a lithium precipitation rapid quantitative detection method and system, a storage medium and a program product, and relates to the field of equipment specially suitable for material research and analys.The method comprises the steps that after ethyl alcohol of a preset volume is dropwise added to the surface of a to-be-detected pole piece, real-time concentration data of hydrogen is collected; determining a time-varying curve of the hydrogen concentration; determining the reaction activity of metal lithium on the surface of the to-be-detected pole piece based on the curve; compensating and correcting the real-time concentration data of the hydrogen according to the reaction activity; and converting the corrected hydrogen concentration data into a lithium quality detection result. The hydrogen generation container is the closed reaction bottle, the needle connected with the hydrogen sensor is inserted into the reaction bottle, the hydrogen concentration can be rapidly detected, the hydrogen concentration in different reaction bottles can be rapidly detected by inserting different reaction bottles, and the detection process is in a closed environment. The method is used for improving the precision of quantitative detection of precipitated lithium, so that the frequency of electrode replacement and calibration is reduced, and the continuity and reliability of detection data in the production process are improved.

The invention relates to the field of medical materials and medical instruments, and discloses a dry bioprosthetic valve and a preparation method thereof.The preparation method comprises the following steps that S1, pericardium and a cross-linking agent solution are mixed for a cross-linking reaction; s2, carrying out first dehydration treatment on the crosslinked pericardium by adopting a first dehydration solution with gradually increased concentration gradient under an ultrasonic condition; and S3, carrying out second dehydration treatment on the pericardium subjected to the first dehydration treatment by adopting a second dehydration solvent, so as to obtain the dried bioprosthetic valve. According to the preparation method provided by the invention, ethanol, isopropanol and water in a specific proportion are adopted to prepare a dehydration solution with gradient concentration, and two-step dehydration drying is carried out in combination with the physical effect of an ultrasonic technology and glycerol, so that rapid rehydration of the bioprosthetic valve is realized, and the original shape and mechanical property of the bioprosthetic valve can be better recovered after rehydration; and the immediate hemodynamic stability of the valve is improved.

The invention discloses an iron-doped manganous-manganic oxide material and a preparation method and application thereof.According to the iron-doped manganous-manganic oxide material and the preparation method and application thereof, manganese sulfate serves as a manganese source, DTPA ferric ammonium salt serves as a complexing agent and a doping agent, ammonia water serves as alkali liquor, ethyl alcohol serves as a dispersing agent, and the preparation process is optimized in a targeted mode; the iron-doped manganous-manganic oxide material with uniform particle size distribution is prepared, the doping uniformity of the iron element in large-size micron-sized manganous-manganic oxide particles is improved while the sulfur content in the material is reduced, and the product is good in particle size uniformity and high in tap density. In addition, the process provided by the invention also has the characteristics of simple flow, easiness in operation, low input cost, high economic benefit and large-scale popularization and application.

The invention discloses hansenula polymorpha with low ethanol yield and high aroma yield and application of hansenula polymorpha, and belongs to the technical field of microorganisms. According to the invention, a strain of high-aroma-yield saccharomycetes, which is hanseniaspora uvarium, is separated from fruits, and the preservation number of the saccharomycetes is CCTCC (China Center for Type Culture Collection) NO: M 20242562. The quality of the low-alcohol yellow peach beverage fermented by the high-aroma-yield strain provided by the invention is improved, and the alcoholic strength after fermentation is well reduced and is only 0.4% vol. Through flavor substance detection before and after fermentation, flavor substances generated by the strain are rich in variety, for example, 90.73 mu g / kg of phenethyl alcohol is newly generated. Sensory evaluation shows that the low-alcohol yellow peach beverage fermented by the strain is outstanding in flower fragrance and fruit fragrance, the richness and the balance degree are improved, it is proved that the overall flavor characteristics of the low-alcohol beverage can be remarkably improved, and more pleasant sensory experience is brought to consumers.

The invention relates to the technical field of pharmaceutical preparations, and provides a minoxidil film coating agent as well as a preparation method and application thereof. The minoxidil film coating agent provided by the invention comprises 40-60% of propylene glycol, 3-7% of polyvinyl alcohol, 20-30% of ethanol, 1-7% of minoxidil and the balance of water. According to the invention, propylene glycol is taken as a solvent, a plasticizer and a transdermal absorption enhancer, polyvinyl alcohol is taken as a film-forming material, and ethanol is taken as a volatile agent, after administration, ethanol is volatilized to promote film formation of polyvinyl alcohol, and propylene glycol enhances the plasticity of the formed film, so that the effect of reducing liquid medicine loss is achieved, the local medicine concentration is increased, and the bioavailability is improved. The minoxidil liniment disclosed by the invention has excellent skin permeability, can effectively convey a medicine to a required part, and can ensure that the medicine is released at a fixed position of the skin and is accurately administered in a medicine release process, so that the stimulation of liquid medicine flow to other parts is reduced, and a good treatment effect is achieved.

The invention provides a hole transport layer precursor solution, a hole transport layer, a preparation method and application of the hole transport layer, and a perovskite cell, and belongs to the technical field of hole transport layers. The hole transport layer precursor solution comprises a self-assembled single molecule and an organic solvent; the organic solvent comprises a solvent A, a solvent B and a solvent C; the solvent A comprises more than one of a phosphate ester solvent and an alcohol ether solvent; the solvent A contains four hydrogen bond receptors; the boiling point of the solvent A is 215-290 DEG C; the solvent B comprises more than one of ethanol, isopropanol, normal propyl alcohol, butanol, ethylene glycol and N, N-dimethylformamide; the solvent C comprises more than one of ethyl acetate and normal hexane. A ternary hydrogen bond network is formed through the solvent A, the solvent B and the solvent C, the agglomeration degree of SAM molecules is remarkably reduced, and the device performance is improved.

The invention relates to the technical field of biomass liquid fuels, in particular to a biomass liquid fuel and a preparation method thereof, and the biomass liquid fuel comprises the following components by weight: 40-60 parts of biomass-based methanol; 10 to 20 parts of biomass-based ethanol; 5 to 15 parts of biomass-based n-butyl alcohol; 5 to 10 parts of dimethyl ether; 10 to 20 parts of biodiesel; 1-5 parts of a lignin derivative; 0.1 to 0.5 part of an antioxidant; 0.1 to 0.5 part of a stabilizing agent; 0.5-2 parts of a purification dispersant; 1-3 parts of bio-based glycerol n-butyl ether; according to the invention, a plurality of alcohols (methanol, ethanol and n-butyl alcohol) are synergistically used, so that a series with the carbon chain length gradually increasing from C1 to C4 is formed. According to the design, the volatility and the energy density of the fuel are balanced, the oxygen content of the fuel is increased through hydroxyl (-OH) in alcohol molecules, and more complete combustion is promoted.

This invention discloses a method for preparing an air-based hydrophilic-oleophobic coating, comprising the following steps: a) adding a silane coupling agent to ethanol to obtain solution A; b) first adding perfluorooctanoic acid and sodium hydroxide to ethanol to obtain a sodium perfluorooctanoate ethanol solution, then adding at least two types of hydrophilic nanoparticles of the same particle size to the sodium perfluorooctanoate ethanol solution to obtain solution B; c) adding a fluorinated surfactant and at least two types of hydrophilic nanoparticles of the same particle size to ethanol to obtain solution C; d) first mixing solution B and solution C uniformly to obtain solution D, then slowly adding solution A dropwise to solution D to obtain suspension E; e) spraying suspension E onto the surface of a substrate and drying at 55-65°C for 1-3 hours to obtain an air-based hydrophilic-oleophobic coating. The preparation method of this invention is simple, and the resulting coating exhibits excellent hydrophilicity and oleophobicity, acid and alkali resistance, salt resistance, and oil stain resistance.

The invention discloses high-purity oxamide with concentrated particle size and spherical morphology, a preparation method of the high-purity oxamide and application of the high-purity oxamide in preparation of a slow-release fertilizer, and belongs to the technical field of oxamide synthesis and application. The method comprises the following steps: mixing an ammonia-alcohol solution and an alcohol ester solution, conveying the mixed solution into a series tubular reactor for reaction, and then conveying the mixed solution into a parallel tubular reactor for reaction after pressure stabilization and flow equalization to obtain a reaction solution containing oxamide; performing flash evaporation on the reaction liquid to obtain flash evaporation liquid and flash evaporation gas, and performing solid-liquid separation on the flash evaporation liquid to obtain solid oxamide and filtrate; and drying the solid oxamide to obtain the oxamide. The method realizes high conversion rate and high purity, and the product has ultrafine particle size distribution. The purity of the prepared oxamide is greater than or equal to 99%, the D50 particle size is concentrated to 50 + / -15 microns, the spherical morphology is uniform, the release is stable, and the oxamide has a very good effect in preparation of long-acting slow-release fertilizers and combustion inhibitors and research on the nitrogen utilization rate.

The invention relates to low-temperature lead-free formic acid solder paste and a preparation method and application thereof, and belongs to the technical field of welding materials. The low-temperature lead-free formic acid solder paste is prepared from the following raw materials in percentage by mass: 85-90% of alloy welding powder and 10-15% of scaling powder, the soldering flux comprises the following raw materials in parts by weight: 10-15 parts of an activating agent, 1-5 parts of a rheological agent, 20-30 parts of an organic solvent, 20-30 parts of a paste forming agent, 3-5 parts of a surfactant and 0.1-0.5 part of a corrosion inhibitor, the activating agent is a composition of hydrogenated dimer acid, glycollic acid and ethylenediaminetetraacetic acid, and the organic solvent is a composition of tetrahydrofurfuryl alcohol and cyclohexanol. The paste forming agent is polyethylene glycol. The solder paste is suitable for a low-temperature welding process at the temperature of 120-150 DEG C, welding energy consumption can be reduced, the residual rate after welding is low, follow-up cleaning is not needed, the production environment can be improved, and the production cost can be reduced.

The invention discloses a nuclear magnetic signal separation method for water in a miscible solution in a porous medium, and relates to the technical field of fluid flow research, and the method comprises the following steps: S1, selecting a porous medium core sample to be detected, and obtaining the gas logging porosity and permeability of the core; s2, injecting ethanol into the saturated water rock core to simulate a displacement process, and obtaining relaxation time distribution of the rock core; s3, injecting ethanol into the dried rock core, and obtaining relaxation time distribution of the rock core; s4, heavy water is injected into the saturated water rock core, and relaxation time distribution of the rock core is obtained; s5, obtaining relaxation time distribution of water in a mixed solution of ethanol and water; s6, acquiring an ethanol injection PV critical value of a differential spectrum method; s7, obtaining an ethanol injection PV critical value of a time domain analysis method; and S8, selecting a differential spectrum method or a time-domain analysis method to separate a nuclear magnetic signal of water in a mixed solution of ethanol and water in the porous medium. The problem that the content and distribution change of water in the porous medium in the miscible-phase displacement process are difficult to accurately measure by an existing conventional displacement experiment method is solved.

The invention belongs to the technical field of shield construction, and particularly relates to a nano-based shield muck improving foaming agent as well as a preparation method and application thereof. Specifically, in the field of shield tunneling foaming agents, nano silicon dioxide is innovatively adopted as a powerful foam stabilizer, the powerful foam stabilizer, hydroxypropyl methyl cellulose, polyvinyl alcohol and coconut oil diethanolamide jointly form a powerful foam stabilizing system, and dodecyl dimethyl amine oxide and sodium alpha-olefin sulfonate serve as auxiliary foaming components to expand environmental adaptability. And the muck improved foam with small volume, strong deformability and good stability is formed. Foam prepared by the foaming agent provided by the invention has the advantages of moderate foaming ratio, long half-life period, fine foam, small volume and the like, that is, the foaming agent can continuously and effectively play a role in improving the muck, and can effectively meet the requirements on the performance of the muck in the whole shield construction process, so that the foaming agent has good practical application value.

The invention belongs to the technical field of health-care food, and particularly relates to a composition and oral drops with the effects of dispelling the effects of alcohol, protecting the liver and relieving hangover as well as a preparation method and application of the composition and the oral drops. The invention provides a composition taking silybin eutectic crystal, curcumin eutectic crystal, ampelopsis grossedentata extract, pyrroloquinoline quinone disodium salt, reduced glutathione, alpha-ketoglutaric acid, vitamin, hericium erinaceus extract, frankincense extract, licorice extract and the like as main active ingredients, and the composition is subjected to scientific formula screening and functional verification, and has the advantages that the composition has the obvious curative effect, and the curative effect is obvious; the traditional Chinese medicine composition can effectively improve the metabolism of ethanol, protect liver and gastric mucosa, and is helpful for relieving hangover-related symptoms such as fatigue, thirst, sleepiness, headache, dry mouth, stomachache, nausea, hypomnesis, inattention and the like.

The utility model belongs to the technical field of detection, particularly relates to an ethanol derivative detection device, and aims to solve the problems that a test tube is oscillated by shaking a wrist to accelerate mixing of solutions, the next step cannot be prepared in the process, and the wrist of a tester is damaged by long-time shaking, and the ethanol derivative detection device comprises a base, the alcohol lamp is arranged at the top of the base, the reagent bottle is arranged at the top of the base, the supporting frame is fixedly connected to the top of the base, and the test tube rack is fixedly connected to the top of the base. Meanwhile, an oscillating assembly capable of automatically swinging left and right in a reciprocating manner is arranged, so that wrist injury of a tester caused by long-time swinging is avoided, reagent solution mixing is accelerated, two hands are liberated, the tester can prepare for the next operation step, and the testing speed is increased.

The invention provides a preparation method and application of a silicon dioxide anti-blocking agent for a thin film, and relates to the technical field of anti-blocking agents. The preparation method of the silicon dioxide anti-blocking agent comprises the following steps: uniformly mixing and stirring tetraethoxysilane, ethanol, water and ammonia water, adding polyethylene glycol, stirring, carrying out water bath reaction, centrifuging, washing and calcining to obtain porous silicon dioxide microspheres; the preparation method comprises the following steps: dispersing porous silicon dioxide in absolute ethyl alcohol, adding a silane coupling agent, reacting, centrifuging, washing and drying to obtain silanized porous silicon dioxide microspheres; dispersing the silanized porous silicon dioxide microspheres in deionized water, adding a surfactant lauryl sodium sulfate and a methyl methacrylate and butyl acrylate monomer mixture, adding an initiator azodiisobutyronitrile for reaction, and centrifuging, washing and drying after the reaction is completed; and finally, carrying out heat treatment on the obtained product. The binding force between existing silicon dioxide anti-blocking agent particles and a film substrate is improved, and long-term effectiveness is maintained.

The invention provides a platycodon grandiflorum extract for preventing or / and treating non-alcoholic fatty liver disease, which is prepared by the following steps: extracting a platycodon grandiflorum medicinal material with absolute ethyl alcohol to obtain a platycodon grandiflorum extract PG-1; and extracting platycodon grandiflorum dregs with water to obtain the platycodon grandiflorum extract PG-2. The invention also provides a preparation method and application of the platycodon grandiflorum extract. The platycodon grandiflorum extract disclosed by the invention has an obvious effect of treating the non-alcoholic fatty liver disease, and compared with an atorvastatin calcium tablet, the medicinal effect of the platycodon grandiflorum extract is equivalent to that of the atorvastatin calcium tablet in two groups of extracts PG-1 and PG-2-1; according to the present invention, the pharmacological effects of the extracts PG-2 and PG-2-2 groups are significantly superior to the pharmacological effects of atorvastatin calcium tablets, and particularly, the separated and purified extracts PG-2-2-1, PG-2-2-2 and PG-2-2-3 can provide significant effects under the milligram-level use amount, and provide the pharmacological effects better than the pharmacological effects of the single platycodin D so as to provide the synergistic effect. In the preparation process of the PG-2-2-3, only ethanol with different concentrations needs to be used for separation and purification, so that the production cost is greatly reduced, and meanwhile, the pollution of chemical reagents is reduced.

The invention discloses a high-temperature-resistant and wear-resistant modified TPU film and a preparation method thereof.The preparation method comprises the steps that S1, a long-chain silane coupling agent, ethyl alcohol and an aqueous solution are mixed, and a first mixed suspension is formed; mixing a short-chain silane coupling agent with ethanol and an aqueous solution to form a second mixed suspension; step S2, uniformly dispersing inorganic nanoparticles in an ethanol-water mixed solution by utilizing emulsifying equipment; mixing the solutions obtained in the steps S1 and S2, reacting in a container, filtering and washing the obtained product, and drying to obtain modified inorganic nanoparticles; mixing the dried TPU particles with the modified inorganic nano powder, and granulating; and uniformly mixing the modified TPU particles, the raw material particles and an antioxidant according to a set amount, putting the mixture into casting equipment for processing, and applying pressure to the extruded viscous TPU material, so that the extruded viscous TPU material is directionally and uniformly stretched and cooled, thereby obtaining the modified TPU film. According to the preparation method, the dispersity and interface bonding strength of the inorganic nanoparticles in the TPU film can be remarkably improved.

The invention discloses an efficient wetting and agglomeration composite dust suppression material and a preparation method and application thereof.The preparation method includes the following steps that 1, water, artemisia seed gum and ethyl alcohol are added into a container and stirred to be uniform, then a NaOH solution is dropwise added, alkalization is conducted for 30 min to 1 h, and a mixed solution I is obtained; (2) adding sodium chloroacetate and epoxypropane into the mixed solution I, heating to react until the reaction is complete, cooling the mixed solution to room temperature, and dropwise adding hydrochloric acid while stirring to neutralize until the pH is neutral, so as to obtain a mixed solution II; and (3) adding polyacrylamide into the mixed solution II, heating to react until the reaction is complete, and adding a surfactant to obtain a dust suppressant solution. The dust suppressant has efficient wetting and coagulation effects, the anti-interference capability of a consolidation layer is improved, water evaporation is effectively slowed down, and the action time of the dust suppressant is prolonged.

The invention relates to a method for determining the content of total ginkgolic acid in a ginkgo biloba extract, which comprises the following steps: dissolving an extract sample in 50% ethanol, and extracting with chloroform. Adding a proper amount of ethanol into the water layer, and extracting with chloroform; and combining all extraction liquids, concentrating to be dry, dissolving residues by using methanol, and detecting by using a liquid chromatograph. By investigating a linear range test, a precision test, a stability test, a repeatability test and a standard recovery test of the method, the method can remarkably improve the purity and the detection sensitivity of a target object, reduce the matrix effect and solve the problem of impurity co-extraction of a traditional single solvent, so that the content detection result of ginkgolic acid is more accurate, and the method is suitable for industrial production. The method plays an important role in guaranteeing the safety of the ginkgo biloba extract product.

The invention relates to the technical field of catalysts, and discloses a foam structure catalyst and a preparation method and application thereof. The foam structure catalyst comprises a foam structure, metal M2, metal oxide M2Ox, heteropolyacid salt of the metal M2, optional tungsten oxide WOz1 and optional molybdenum oxide MoOz2, the metal M2, the metal oxide M2Ox and the heteropolyacid salt of the metal M2 grow on the foam structure, z1 is equal to 2-3, and z2 is equal to 2-3; wherein the heteropolyacid salt is selected from one or more of tungstate and molybdate, M2 is selected from one or more of Cu, Ni, Fe, Zn and Co, and x is equal to 0.5 to 1.5; the foam structure contains metals M1 and M1Oy, M1 is selected from one or more of foam iron, foam nickel and foam cobalt, and y is equal to 1-1.5. The foam structure catalyst can be used for stable hydrogenolysis of glucose, the glucose conversion rate stably reaches 100% in a continuous fixed bed reactor, and the selectivity of 1, 3-propylene glycol is larger than or equal to 55%, and the selectivity of ethyl alcohol is larger than or equal to 48%.

The present invention relates to an acetalate of an ethylene-vinyl alcohol copolymer, the acetalate comprising 20-80 mol% of ethylene units and 4-76 mol% of vinyl alcohol units based on the total monomer units constituting the acetalate, the acetalate having a degree of acetalation of 3-80 mol%, and satisfies formula (1): 0.71 < = W0.05 h / 2f < = 1.09 (W0.05 h / 2f represents a symmetry coefficient determined by reversed phase partition gradient high performance liquid chromatography based on a water-ethanol eluent in accordance with JIS K 0124: 2011) and formula (2): 1.20 < = Tm / Tg < = 1.35 (Tm and Tg respectively represent a melting peak temperature (K) and an intermediate point glass transition temperature (K) measured in accordance with JIS K7121: 2012), and the oxygen permeation rate at 20 DEG C and 65% RH is 150 cc.20 [mu] m / m2. Day. Atm or less.

The invention belongs to the technical field of forest chemical industry and natural perfume extraction and separation, and particularly discloses a superheated steam distillation separation and recovery method for perfume components in cinnamon oil rectifying still residues. The method comprises the following steps: processing the cinnamon oil rectifying still residues by adopting a steam distillation method taking normal-pressure superheated steam as a desorption medium, carrying out condensation cooling and phase separation on distilled oil-water mixed gas, and collecting oily liquid or crystalline solid containing cinnamon spice components, and carrying out one or more physical isolation methods such as freezing crystallization, vacuum fractionation or rectification, recrystallization and the like to obtain natural cinnamon monomer spices such as o-methoxycinnamaldehyde, o-methoxycinnamic acid, phenethyl alcohol and the like. The method has the advantages of low equipment investment, simple and feasible operation, low production cost, clean and pollution-free process, good operation safety, high industrial application feasibility and the like.

The invention provides a covalent organic framework proton exchange membrane, a preparation method thereof and a high-temperature proton exchange membrane fuel cell. The preparation method comprises the following steps: dispersing 5-bromomethyl-dimethyl isophthalate and trimethylamine in alcohol to obtain a reaction solution, and performing water bath and rotary evaporation to obtain a first intermediate; dispersing the first intermediate in a hydrazine hydrate / ethanol mixed solution, reacting at 80-100 DEG C for 24-48 hours, and recrystallizing to obtain a second intermediate; dispersing the second intermediate and silver chloride in water, and carrying out inert gas reaction at 80-100 DEG C for 10 hours to obtain a quaternary ammonium type amine monomer; dissolving a quaternary ammonium type amine monomer and glacial acetic acid in water to obtain an amine monomer solution; the preparation method comprises the following steps: dissolving 1, 3, 5-benzenetricarboxaldehyde and 1, 4-dioxane in mesitylene to obtain an aldehyde monomer solution; adding the aldehyde monomer solution above the amine monomer solution to obtain an interfacial polymerization reaction system, reacting at 16-40 DEG C for 7 days, and filtering to obtain a nanosheet dispersion liquid; dropwise adding the dispersion liquid into a suction filtration container, performing vacuum suction filtration to form a membrane, and then adding a phosphoric acid solution to enable phosphoric acid molecules to enter the membrane to obtain the covalent organic framework proton exchange membrane.

The invention relates to cinnamomum camphora leaf essential oil and application thereof in preparation of a cinnamomum camphora leaf essential oil preservative film. The cinnamomum camphora leaf essential oil extracted from cinnamomum camphora leaves has antibacterial activity and antioxidant activity superior to those of cinnamomum camphora leaf essential oil of the same genus, the essential oil and ethyl alcohol are mixed to form a stable cinnamomum camphora leaf essential oil solution, and the stable cinnamomum camphora leaf essential oil solution and beta-cyclodextrin are included to obtain the cinnamomum camphora leaf essential oil microcapsule. Glycerol is added into the gelatinized starch aqueous solution, and then the cinnamomum camphora leaf essential oil microcapsules are added to prepare the cinnamomum camphora leaf essential oil preservative film. The cinnamomum camphora leaf essential oil preservative film prepared by the invention has antibacterial and antioxidant effects.

A tattoo ink particularly useful for light skin. The tattoo ink includes one or more pigment in a carrier solution. The carrier solution includes polyvinyl alcohol, water, ethanol, and a humectant. The humectant may be glycerin or polypropylene glycol or a blend of thereof. The carrier solution may also include witch hazel extract. The polyvinyl alcohol may have a molecular weight range of 30,000 to 85,000 and be at least 98% hydrolyzed.

The invention provides treatment equipment for ethanol and water mixed mother liquor and a sodium nitrate and potassium nitrate purification method, and relates to the technical field of waste liquid treatment, the treatment equipment comprises a flocculation box, a flocculation frame and a driving mechanism; a mounting plate is mounted at the top of the flocculation frame through bolts, the driving mechanism comprises a mounting frame mounted on the upper surface of the mounting plate, and a top plate and a bottom plate are fixedly arranged on the inner wall of the mounting frame. According to the scheme, in the overflowing and liquid discharging process, the water body in the flocculation box can be changed, flocculation groups with small sizes can turn over upwards, and the inclined plate with large initial inclination can block and capture the flocculation groups which turn over upwards, so that the flocculation groups are prevented from overflowing along with water flow through the inclined plate; meanwhile, the linkage plate can be adopted to control the multiple inclined plates to synchronously turn over in a linkage mode to change the inclination, flocculation groups captured on the inclined plates are shaken to be precipitated downwards, and it is guaranteed that overflowing and liquid discharging can be fast, so that waste liquid can be well flocculated, efficient and stable flocculation is guaranteed, and follow-up discharging or recycling is facilitated.