53 results about "Trimethylamine" patented technology

The invention discloses microcapsule powder for covering the oil smell of euphausia superba oil and a preparation method of the microcapsule powder, and belongs to the field of euphausia superba oil processing. The microcapsule powder is composed of 50-75% of OSA starch, 10-30% of euphausia superba oil, 3-20% of sodium alginate, 1-10% of succinic acid and 0.5-5% of calcium hydrophosphate, during preparation, the OSA starch is gelatinized and then sheared and homogenized with the euphausia superba oil to obtain a miniemulsion, the succinic acid, the sodium alginate and the calcium hydrophosphate are prepared into a mixed solution, the mixed solution is mixed with the miniemulsion in proportion, and spray drying is performed to obtain a finished product. An OSA starch-sodium alginate double-wall material system is adopted, a compact cross-linked layer is formed through pH response, peculiar smell substances such as trimethylamine can be completely masked, the astaxanthin retention rate is up to 95.14%, the embedding rate reaches 89.48%, krill oil oxidation is effectively inhibited, krill oil is converted into powder, the stability and the sensory property are improved, application of krill oil in the food field is widened, the technology is simple, and the method is suitable for industrial production. The method is suitable for industrial production.

Provided is a cosmetic containing ascorbic acid and / or a salt thereof, which has excellent stability and reduced irritation to the skin. The cosmetic according to the present invention contains ascorbic acid and / or a salt thereof, ultrapure water, and an antioxidant, and the salt of ascorbic acid is at least one selected from the group consisting of a trimethylamine salt, a triethylamine salt, a monoethanolamine salt, a triethanolamine salt, a pyridinium salt, an arginine salt, an ammonium salt, a sodium salt, a potassium salt, a calcium salt, a magnesium salt, and an aluminum salt of ascorbic acid. The antioxidant is glutathione or sodium pyrosulfite, the pH of the cosmetic material is adjusted to 5.0-7.0, and the dissolved oxygen content of the cosmetic material is 0-5 mg / L.

This invention discloses a cationic etherifying agent and its preparation method, belonging to the field of cationic etherifying agent production technology. The preparation method includes: continuously feeding trimethylamine and hydrochloric acid into a raw material pretreatment unit, pre-cooling to -10~20℃; entering a first tubular reactor, reacting at -10℃~20℃ and 0.15MPa for 10~60 minutes to generate trimethylammonium chloride; trimethylammonium chloride and epichlorohydrin entering a static mixer, simultaneously adding a catalyst and an organic amine; entering a second tubular reactor, reacting at 10~50℃ and 0.2MPa for 1~3 hours; during the reaction, monitoring the chloride ion concentration and epichlorohydrin residue in real time, dynamically adjusting the reaction parameters; filtering the reaction product through a nanofiltration membrane to obtain a high-purity cationic etherifying agent. This invention employs a continuous tubular reaction process combined with automatic control and nanofiltration membrane separation, resulting in a short production cycle, low energy consumption, few by-products, and a high-purity, odorless product, showing good industrial application prospects.

The invention discloses a cross-linked polystyrene anion exchange membrane as well as a preparation method and application thereof. The preparation method of the cross-linked polystyrene anion exchange membrane comprises the following steps: firstly, taking styrene and p-chloromethyl styrene as monomers, and obtaining a copolymer through bulk polymerization under the action of an initiator; the preparation method comprises the following steps: firstly, preparing a copolymer from polystyrene, then preparing a membrane casting solution from the copolymer and 1, 4-diazabicyclo [2.2. 2] octane, casting to form a membrane, then immersing the obtained membrane into a trimethylamine aqueous solution for complete quaternization, and finally treating in a KOH aqueous solution to obtain the cross-linked polystyrene anion exchange membrane. The invention provides an application of the cross-linked polystyrene anion exchange membrane in alkaline electrolyzed water. The anion exchange membrane is simple in synthesis process, reagents are cheap and easy to obtain, the contradiction between the OH <-> conductivity and the size stability of a traditional anion exchange membrane can be greatly balanced, and meanwhile the anion exchange membrane has high alkaline stability and shows excellent electrolytic performance in alkaline electrolyzed water.

The invention discloses a water-soluble fluorescent conjugated polyelectrolyte as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out Suzuki coupling reaction or Sonogashira coupling reaction polymerization on the synthesized 3, 6-diborate carbazole or 3, 6-diethynyl carbazole monomer, and then carrying out quaternization reaction to obtain the conjugated polyelectrolyte. The 3, 6-substituted carbazole is introduced into a polymer main chain to form a non-rigid structure, so that the solubility of the polymer in a solvent is improved, and the blue fluorescence quantum yield is increased; meanwhile, the trimethylamine quaternary ammonium salt side group not only enhances the water solubility, but also is used as a molecular recognition site to be combined with negative charges of heparin through electrostatic interaction; a fluorescent sensing system is formed after the conjugated polyelectrolyte is dissolved in a buffer solution, and the fluorescence intensity of the fluorescent sensing system is remarkably quenched and responded along with increase of the heparin concentration. The heparin quantification range can be flexibly adjusted by adjusting the concentration of the conjugated polyelectrolyte; the method is suitable for detection of common heparin and low-molecular-weight heparin and analysis of heparin in complex samples.

The invention discloses a preparation method of electronic-grade tris (hydroxymethyl) aminomethane, which comprises the following steps: tris (hydroxymethyl) aminomethane is prepared into an aqueous solution, the aqueous solution passes through a chromatographic column, the filler of the chromatographic column is chelate resin or cation exchange resin, and the chelate resin or cation exchange resin is subjected to transformation pretreatment by using ammonia water before being filled; the obtained tris (hydroxymethyl) aminomethane solution is subjected to circulating filtration through a three-stage membrane module filtration system; adding a chelating agent to carry out chelating concentration treatment, and then concentrating to remove part of water; carrying out gradient cooling crystallization on the sample; and sequentially centrifuging and drying the cooled and crystallized trihydroxymethyl aminomethane solution to obtain the electronic-grade trihydroxymethyl aminomethane. The metal ion content of the finally obtained trihydroxymethyl aminomethane is 10 ppb or below, after further treatment, the metal ion content can be controlled to 1 ppb or below, operation is easy, and industrial production is facilitated.

A method for treating wastewater containing methanol, in which methanol is subjected to anaerobic treatment, is characterized in that organic nitrogen having 2-4 carbon atoms (excluding amino acids) is added. The organic nitrogen is at least one of tetramethylammonium hydroxide, trimethylamine and dimethylamine.

The application provides a kind of lure bait and its preparation method, the lure bait is prepared from the following components by weight parts: wheat flour 5-15 parts, pig blood 1-5 parts, powder 1-2 parts, sugar 10-20 parts, trimethylamine oxide 0.5-2 parts, fishy powder 0.5-1 part, and water in appropriate amount; the powder is konjac flour and / or pea powder.The specific preparation method is as follows: first, bake the wheat flour to full ripeness, add pig blood and stir to obtain mixture I; then, add water to the konjac flour and stir to a viscous state, add mixture I and heat to stir to obtain mixture II; after adding sugar to mixture II until the sugar is completely dissolved, add trimethylamine oxide and fishy powder and stir to obtain mixture III; finally, place mixture III into a mold, heat and shape to obtain the lure bait.The lure bait prepared by the application has the advantages of easy-to-obtain raw materials, simple preparation method, deep red color, fishy smell, shiny surface, slow dissolution in water, and can attract fish well and hook fish.

Salmon meat is prone to spoilage during transportation and storage due to its rich protein and fatty acid content. During the spoilage process, the released volatile organic compounds (VOCs) can vary greatly, mainly including trimethylamine (TMA), dimethylamine (DMA), formaldehyde (HCHO), and ammonia (NH3). In this study, an array of quartz crystal microbalance (QCM) gas sensors was established, which was modified with graphene oxide (GO), Mxenes (Ti3C2T X ), hydroxylated multi-walled carbon nanotubes (MWCNTs), and graphdiyne oxide (GO P ), respectively, to detect TMA, DMA, HCHO, and NH3 in salmon meat, respectively. The results showed that the four kinds of sensor materials modified QCM sensors had good sensitivity, selectivity and repeatability for the corresponding target gas. Finally, the freshness of salmon meat was detected using the sensor array. The sensor response data was visualized by principal component analysis (PCA), and the first two principal components (PCs) explained 98.8% of the total contribution variance. A further discriminant model was established using quadratic support vector machine (QSVM), and the classification result was 100%. To further describe, the detection results were compared with the total volatile base nitrogen (TVB-N) content to judge the freshness of salmon meat.

The application discloses a long-acting deodorization type biodegradable polymer fiber and a preparation method thereof. The method takes biodegradable material as a matrix, and composites a pore-forming agent and a multifunctional deodorant as functional components. Uniform spinning liquid is prepared through in-kettle constant-temperature stirring dissolution, filtration and defoaming. The spinning liquid is formed into a product fiber through double-component synergistic coagulation bath wet spinning, gradient heat drawing, high-temperature setting, oily functional coating finishing and segmented drying. The preparation process of the application is mild, and can avoid high-temperature inactivation of the functional components. The fiber fineness is adjustable, the breaking strength is high, the deodorization rate of hydrogen sulfide, methyl mercaptan and trimethylamine, three kinds of odor gases, is greater than or equal to 96%, the ammonia gas adsorption rate is greater than or equal to 92%, the fiber is resistant to washing and rubbing, and the biodegradation rate is greater than or equal to 65%. The fiber can be widely applied to high-end garments, home textiles, medical health, air purification and other fields, and the process has strong controllability and is easy to be industrialized and mass-produced.

This invention relates to the field of water pollution control and treatment technology, and in particular to an aeration treatment device for wastewater in a trimethylamine purification process. The device includes a gas collection hood, a guide tube, an air distribution plate, and aeration pipes. The lower part of the gas collection hood has a slot connecting to its interior. The guide tube has a vertical axis, is open at both ends, and there are multiple guide tubes spaced apart along the length of the gas collection hood. This invention incorporates an air distribution plate and aeration pipes. By causing the air distribution plate to drive the multiple aeration pipes, which are circumferentially spaced, to reciprocate within a preset angle range, a non-steady, reciprocating sweeping flow field can be generated. This more effectively disrupts the flow pattern, preventing pollutants in the wastewater from accumulating in a specific direction. Furthermore, at the moment of oscillation and reversal, the water flow direction and the bubble ejection direction change abruptly, generating a stronger instantaneous shear force, similar to a "back-and-forth brushing" action, resulting in a more significant removal effect on impurities on the membrane fiber surface.

The invention discloses an SIS soap-free emulsion as well as a preparation method and application thereof, and belongs to the field of preparation of high polymer material latex films. The SIS soap-free emulsion is prepared from an SIS ionomer and water; the SIS ionomer is provided with a lateral carboxylate group or a lateral carboxylic ammonium salt group; the lateral carboxylate group is selected from at least one of sodium carboxylate, potassium carboxylate, lithium carboxylate, calcium carboxylate and magnesium carboxylate; the lateral carboxylic acid ammonium salt group is selected from at least one of triethanolamine maleate, triethylamine maleate, trimethylamine maleate, triethylamine maleate and isopropyl amine maleate. No emulsifier needs to be added in the whole preparation process, the complex cleaning process of emulsifier residues is avoided, and generation of emulsifier wastewater is effectively reduced. Compared with natural rubber gloves and nitrile rubber gloves, the prepared SIS latex gloves are more comfortable to wear, wider in application and higher in adaptability.

The invention relates to the technical field of foul smell treatment in livestock and poultry breeding, in particular to a compound livestock and poultry manure deodorant as well as a preparation method and application thereof. The deodorant comprises a compound microorganism culture solution, a plant compound extracting solution and a chemical absorbent, the compound microorganism culture solution comprises a culture solution of sulfur oxidizing bacteria, a culture solution of dimethyl sulfide degrading bacteria, a culture solution of trimethylamine degrading bacteria and a culture solution of ammonia oxidizing bacteria; the plant composite extracting solution comprises a plant extracting solution and a surfactant; the raw materials of the plant extracting solution are selected from one or more of honeysuckle, raspberry and clove; the chemical absorbent comprises zinc diricinoleate. The composite livestock and poultry manure deodorant provided by the invention is simple in process and relatively low in cost, has the characteristics of fast deodorization effect and lasting effect, and is suitable for popularization and application in production practice.

The application discloses a preparation method and application of a surface grafted biomimetic zwitterionic anti-fouling polyamide membrane and belongs to the membrane technical field. The preparation steps of the anti-fouling polyamide membrane comprise the following steps: modifying the polyamide membrane by using a silane coupling agent containing an unsaturated double bond, dropping a solution containing a hydrophobic initiator on the surface of the modified polyamide membrane, dropping an oxidized trimethylamine monomer solution after the solvent on the surface of the polyamide membrane is volatilized, and preparing the anti-fouling polyamide membrane through ultraviolet irradiation. The super-wetting assisted grafting technology is adopted, that is, a super-wetting stable initiator layer is formed on the membrane surface, the interface reaction between the zwitterionic monomer and the membrane surface is promoted, and then a controllable grafting is formed between the zwitterionic monomer and the membrane surface. The anti-protein performance of the novel zwitterionic anti-fouling polyamide membrane in the application is far better than that of a traditional zwitterionic anti-fouling polyamide membrane, and the grafting density is adjustable, so that the water production flux of the nanofiltration membrane can be ensured while the anti-fouling is guaranteed, and the shortcomings of the flux reduction and the insufficient anti-fouling performance caused by the traditional grafting method and the traditional zwitterionic anti-fouling polyamide membrane are overcome.

The invention provides a photosensitizer based on a film-embedded conjugated oligomeric electrolyte as well as a preparation method and application of the photosensitizer. A preparation method of the photosensitizer comprises the following steps: stirring and reacting a compound Br-DC6 and a compound A in THF under a dark condition, removing THF after the reaction is completed, stirring and reacting the obtained product and the compound A in methanol under a dark condition, and removing methanol after the reaction is completed, thereby obtaining the photosensitizer based on the film-embedded conjugated oligomeric electrolyte. The photosensitizer based on the film-embedded conjugated oligomeric electrolyte is obtained; wherein the compound A is trimethylamine or 1, 2-dimethylimidazole; the structural formula of the compound Br-DC6 is shown in the specification. The photosensitizer can efficiently generate ROS and singlet oxygen under illumination, the antibacterial effect is excellent, and the problems that an existing MICOEs photosensitizer is low in ROS yield, poor in film embedding efficiency under physiological conditions and the like can be solved.

The invention relates to the technical field of atmospheric pollution control in environmental chemical industry, and discloses a spherical copper-cerium bimetallic catalyst as well as a preparation method and application thereof. The preparation method of the spherical copper-cerium bimetallic catalyst comprises the following steps: dissolving cerium nitrate hexahydrate with water to obtain a cerium nitrate solution, adding a mixed solution composed of ethylene glycol and glacial acetic acid into the cerium nitrate solution, uniformly mixing, carrying out a hydrothermal reaction, collecting a precipitate after the reaction is finished, and centrifuging, washing, drying and calcining the precipitate to obtain spherical cerium oxide; the preparation method comprises the following steps: adding spherical cerium oxide into a copper nitrate solution, uniformly stirring, carrying out ultrasonic treatment, drying and calcining to obtain a spherical copper-cerium bimetallic catalyst, and catalytically removing trimethylamine by the spherical copper-cerium bimetallic catalyst at low temperature in a nitrogen atmosphere containing trimethylamine and oxygen. And the spherical copper-cerium bimetallic catalyst does not have an obvious inactivation phenomenon when the degradation reaction of the spherical copper-cerium bimetallic catalyst on trimethylamine is performed for 88 hours, and the spherical copper-cerium bimetallic catalyst has excellent nitrogen and carbon dioxide selectivity.

This invention provides a novel method for producing high-purity trimeciate trichloride, which can be obtained with volumetric efficiency and in good yield. [Solution] A method for producing trimeciate trichloride, comprising the steps of (I) reacting trimesic acid with the following compound (B) in the presence of at least one catalyst, iron(III) chloride, zinc oxide, and zinc chloride, and (II) separating the reaction product obtained in step (I) by distillation. Compound (B): 1,3-bis(trichloromethyl)benzene or 1,4-bis(trichloromethyl)benzene

The application discloses a cationic modified rosin anion rosin size with charge reversal stability and a preparation method and application thereof, and belongs to the technical field of anion rosin size. The rosin size is composed of the following raw materials in parts by mass: rosin 100-200 parts; epichlorohydrin 30-90 parts; trimethylamine 3-7 parts; tetrabutylammonium bromide 0.5-1 part; anion starch emulsifier 5-8 parts, sodium dioctyl sulfosuccinate 5-8 parts; defoaming agent 0.5-2 parts; and water 100-240 parts; wherein the anion starch emulsifier is prepared by reacting cassava starch and sodium chloroacetate under alkaline conditions. The modified rosin liquid and the anion emulsifier are emulsified by using a high-temperature normal-pressure phase inversion method to prepare the cationic modified rosin anion rosin size based on the charge reversal stability, and the cationic modified rosin anion rosin size has the characteristics of no chloropropanol, no organic chlorine and good stability, and can realize acid to neutral sizing.

The invention relates to application of a coating premix in tamsulosin hydrochloride sustained-release tablets and the tamsulosin hydrochloride sustained-release tablets. The coating premix is prepared from the following components in parts by weight: 40 to 60 parts of eudragit RS100, 20 to 30 parts of eudragit RL100, 10 to 15 parts of plasticizer, 15 to 20 parts of coloring agent, 15 to 20 parts of anti-sticking agent and 500 to 600 parts of solvent; the eudragit RS100 comprises ethyl acrylate, methyl methacrylate and methacrylic acid chlorinated trimethylamino ethyl ester, and the eudragit RL100 comprises ethyl acrylate, methyl methacrylate and methacrylic acid chlorinated trimethylamino ethyl ester; through application of the coating premix in the tamsulosin hydrochloride sustained-release tablet, the problems that the existing tamsulosin hydrochloride sustained-release tablet cannot be dissolved in the intestinal tract and the bioavailability of the medicine cannot be ensured are solved.

The invention discloses efficient vaporization equipment for TMA recovery, and relates to the technical field of TMA recovery. Comprising a main body assembly and a top cover assembly, the main body assembly comprises a main cylinder, the top cover assembly comprises a top cover body, a carrier assembly used for absorbing waste water and heating the waste water is arranged on the top cover body, and a shaking assembly used for driving the carrier assembly to vibrate and a storage assembly used for recycling impurities are arranged in the main cylinder. According to the invention, trimethylamine is vaporized into a gas state preferentially in a manner of heating waste water, so that the trimethylamine is recovered, the heating carrier further heats the water absorption carrier, residual impurities in the water absorption carrier are crystallized, and the rotating shaft continuously drives the water absorption carrier and the heating carrier to rotate, so that the water absorption carrier and the heating carrier are continuously heated. The water absorption carrier and the heating carrier are in contact with the shaking assembly, so that the whole carrier frame shakes up and down, crystallized impurities are shaken off, the content of the impurities in sewage at the bottom of the main cylinder is reduced, and the recovery efficiency of trimethylamine is improved.

This invention relates to a bio-induced penetrating crystallizing waterproof coating for marine environments and its preparation method. The waterproof coating is made from the following raw materials in parts by weight: 40-50 parts silane impregnating agent; 10-15 parts glycerol; 2-6 parts artificial inducing agent; 5-8 parts bio-calcium powder inducing agent; 3-5 parts pigment inducing agent; and 2-4 parts crystallizing precipitant. The artificial inducing agent is composed of norepinephrine and trimethylamine in a 1:1 mass ratio. The bio-induced penetrating crystallizing waterproof coating provided by this invention is an environmentally friendly coating with high-efficiency anti-corrosion and self-healing functions. Furthermore, it can utilize the aggregation effect of marine shellfish to further increase the corrosion resistance of the underlying concrete.

This invention provides a highly efficient amino acid peptide prepared from hydrolyzed fish protein and its preparation method, belonging to the field of food protein and food protein processing technology. This application addresses the issues of fishy odor, color, and peptide aggregation at the molecular level through the synergistic effect of amine-capturing nano-ligand microspheres, tannic acid-chitosan complexes, and sodium alginate / chitosan oligosaccharide composite powder. The amine-capturing nano-ligand microspheres utilize the cross-linking of chitosan and sodium tripolyphosphate to form a porous structure, and enhance stability and selective adsorption capacity through genipin, efficiently removing fishy odor molecules such as trimethylamine oxide. The tannic acid-chitosan complex selectively removes heme and oxidative pigment molecules through coordination complexation and electrostatic interactions, significantly improving the color of the hydrolysate. The sodium alginate and chitosan oligosaccharide composite system inhibits peptide aggregation and improves transparency through electrostatic repulsion, hydrogen bonding, and supramolecular networks, producing a fishy, ​​colorless, transparent, and stable highly efficient amino acid peptide product.

The utility model provides a temperature control ion exchange device which comprises a tank body filled with ion exchange resin, and the periphery of the tank body is coated with a temperature control composite layer; the temperature control composite layer comprises a plurality of phase change patches which are uniformly distributed around the periphery of the tank body and a protective shell which encircles all the phase change patches; the phase-change patches are filled with photo-thermal phase-change materials, a light scattering plate is clamped between the adjacent phase-change patches, and the light scattering plate is connected with an external light taking device through a light guide medium. A temperature control composite layer is coated on the periphery of an ion exchange tank, so that ion exchange resin in the tank is cooled by means of automatic heat absorption of a phase change material in a high-temperature cooling stage and is heated by means of automatic latent heat release of the phase change material in a low-temperature heat preservation stage by means of the characteristics of the phase change material, and the temperature rise is assisted by photo-thermal phase change; and the temperature control regulation of the ion exchange device is realized. The utility model further provides a methanol production system based on the temperature control ion exchange device, and the concentration of trimethylamine in a methanol product is effectively controlled.

The invention belongs to the technical field of feed additives, and particularly relates to a natural marine product enzymolysis type aquatic feed phagostimulant and a preparation process thereof.The natural marine product enzymolysis type aquatic feed phagostimulant is prepared from enzymatic hydrolysate, fish oil, lactic acid, ethyl lactate, isovaleric acid, pyridine, a trimethylamine aqueous solution, sodium glutamate and a carrier rice bran and hull. Then adding the following components according to the following proportion: 8.5% of fish oil, 0.3% of lactic acid, 0.25% of ethyl lactate, 0.1% of isovaleric acid, 0.05% of pyridine, 1% of a trimethylamine aqueous solution, 2% of sodium glutamate and the balance of carrier rice bran and hull, so that the water content is lower than 18%; the fishy smell of the fish meal of the feed can be obviously stimulated, the dosage of the fish meal is reduced, and the problem that a common phagostimulant is poor in spreading effect in a water body is successfully solved; high-temperature granulation and puffing processing can be tolerated; the feed additive is rich in various amino acids, has a strong and lasting food calling effect on aquatic animals, and can remarkably improve the food consumption, promote growth and reduce the feed coefficient.

The application relates to a kind of amidoxime porous organic polymer and its preparation method and application, and relates to heavy metal adsorption technical field, solve the problem that the specific adsorption selectivity of heavy metal adsorption material in prior art to heavy metal is insufficient, adsorption capacity is small, it is difficult to realize the efficient enrichment and rapid removal of heavy metal ions, and the problem that the development of specific adsorption group in prior art is in technical blank.The present application is by adding sodium nitrite aqueous solution to diphenylamine solution to carry out diazotization reaction, then adding ethyl acetate solution containing 4-hydroxyphenyl acetonitrile and triethylamine to carry out diazo coupling interfacial polymerization reaction, to obtain cyanogen-rich porous organic polymer material;The obtained material is immersed in methanol solution containing hydroxylamine hydrochloride and trimethylamine to carry out post-amidoxime modification, to obtain heavy metal adsorption material.The present application effectively improves the adsorption efficiency and specific recognition adsorption capacity of heavy metal adsorption material, and can be applied to the field of water heavy metal pollution treatment.

This invention relates to the field of organic synthesis technology, and discloses a cationic etherifying agent synthesized based on a composite catalyst and its preparation method. The agent is prepared by reacting epichlorohydrin, trimethylamine, hydrogen chloride, and a composite catalyst, which consists of anhydrous zinc chloride, anhydrous citric acid, and polyethylene glycol 400. The preparation method includes: preparing a trimethylamine hydrochloride base solution containing the composite catalyst under slightly acidic conditions; performing a ring-opening etherification reaction by adding epichlorohydrin dropwise in a controlled temperature stepwise manner; digesting by heating and holding at a constant temperature; continuously blowing in inert gas under a slightly acidic negative pressure environment for microbubble devolatilization; and finally, rapidly cooling through an external heat exchange device to complete the crystallization blocking. This invention improves the low-temperature storage and transportation stability and environmental safety of the cationic etherifying agent by shortening the reaction cycle to less than 12 hours; utilizing steric hindrance coupled with rapid cooling to lower the crystallization point to -9°C to -11°C; and reducing residual trimethylamine to 15 to 30 ppm through a dielectric-controlled gas stripping process.

The invention discloses a smell detection and early warning device and method for bacterium breeding in a refrigerator, and relates to the technical field of smart home. The device comprises an air extractor which is communicated with the interior of a refrigerator and is controlled by an electromagnetic valve, a polytetrafluoroethylene moisture-proof filter membrane which is arranged in a collection channel, a sealed sample storage cavity with a thermal insulation layer, a silica gel conveying pipeline, and an odor analysis unit which comprises a sensor array with specific response to trimethylamine, hydrogen sulfide and methyl mercaptan, the signal processing module comprises an amplification circuit, a low-pass circuit and a temperature compensation circuit. The device is embedded and integrated for the household refrigerator, can stably obtain multi-channel smell characteristics under the interference of temperature and humidity, performs risk grading based on a database and outputs panel and external communication early warning, and has the advantages of accurate judgment, strong interference resistance, high automation degree, low power consumption standby and the like.

This invention relates to the field of adsorption and filtration material preparation technology, specifically a multifunctional composite air purification filter material and its preparation method. It includes the following steps: S1, a method for preparing transition metal ion-modified carbon; S2, a filter material composite method. Compared with existing technologies, this invention provides a multifunctional composite air purification filter material and its preparation method. Modified activated carbon can remove sulfur and nitrogen compounds and odorous gases that are difficult to adsorb conventionally through ion network interaction. The use of copper sulfate, zinc sulfate, and 2-aminoimidazole synergistically can effectively complex and adsorb odorous gases with low olfactory thresholds, such as trimethylamine and methanethiol, which are difficult to treat. This modified activated carbon is then embedded between an activated manganese catalytic framework cloth and an electrostatic meltblown cloth, maintaining an extremely low filter material thickness, thus achieving efficient removal of formaldehyde, particulate matter, and odors from a single filter material.

The invention discloses an X-MCM-41 mesoporous molecular sieve microsphere adsorbent as well as a forming method and application thereof, and provides a technology for preparing a 40-60-mesh microsphere adsorbent through atomization purging forming by taking attapulgite and sesbania gum as composite binders in order to solve the forming problem of application of X-MCM-41 molecular sieve powder in products such as sanitary napkins and urinal pads. Comprising the following steps: preparing X-MCM-41 mesoporous molecular sieve powder, namely preparing the X-MCM-41 mesoporous molecular sieve powder, attapulgite, sesbania powder and water into atomized slurry; green microspheres are obtained by controlling atomization parameters; and carrying out programmed heating, constant-humidity drying and roasting under specific conditions to obtain a final product. The core contradiction that mechanical strength (toughness and hardness) and a mesoporous structure (specific surface) are difficult to consider in X-MCM-41 forming is solved. The obtained microsphere adsorbent is high in strength, low in pulverization rate and high in specific surface area retention rate, can be directly applied to personal care products, efficiently adsorbs pungent smell molecules such as ammonia gas, trimethylamine and hydrogen sulfide, and improves the comfort and safety of the products.

The application discloses a preparation method of konjak vinegar, which comprises the following steps: firstly, konjak powder is subjected to enzymolysis and saccharification by using a glucanase; then, alcohol fermentation and acetic acid fermentation are sequentially performed; meanwhile, purified konjak powder is supplemented before the acetic acid fermentation to perform deep fermentation; finally, konjak vinegar is prepared by using a fructose-glucose syrup to adjust the flavor. The process disclosed by the application has higher production efficiency, the prepared product has low trimethylamine acetate content and high safety, and compared with traditional fruit vinegar, the prepared konjak vinegar has slightly thick taste and contains more functional components such as mannose oligosaccharide, has high acceptance and can play a certain disease prevention effect, and has wide application prospect.