39 results about "Sodium Acetate Trihydrate" patented technology

The invention discloses a preparation method of an antibacterial moisture-permeable polyamide fiber and the antibacterial moisture-permeable polyamide fiber, and relates to the technical field of polyamide fibers. When the antibacterial moisture-permeable polyamide fiber is prepared, pretreated carbon nanotubes, ferric trichloride, sodium acetate trihydrate and diallyl disulfide are subjected to a microwave-assisted heating reaction, and carbon nanotube loaded nano iron sulfide is prepared; the preparation method comprises the following steps: modifying carbon nano tube loaded nano iron sulfide by using 3-aminopropyltriethoxysilane to prepare a modified carbon nano tube; mixing the modified carbon nanotubes and a nylon raw material, and performing melt spinning to obtain modified polyamide fibers; the modified polyamide fibers are modified with diethyl (3-aminopropyl) phosphate, 3-pyridylaldehyde and ethyl isocyano acetate, and flame-retardant modified polyamide fibers are prepared; and modifying the flame-retardant modified polyamide fiber with propane sultone to obtain the antibacterial moisture-permeable polyamide fiber. The prepared antibacterial moisture-permeable polyamide fiber has the advantages of being antibacterial, moisture-absorbing, antistatic, flame-retardant and high in tensile strength.

The invention belongs to the technical field of phase change heat storage materials, and particularly relates to a phase change composite heat storage and energy storage material and a preparation method thereof. The phase-change composite heat and energy storage material comprises the following raw material components: sodium acetate trihydrate, disodium hydrogen phosphate dodecahydrate, porous silicon dioxide, nano Al2O3, expanded graphite, borax, polyacrylamide and the balance of water. The preparation method of the material comprises the following steps: S1, heating sodium acetate trihydrate to a molten state, and dipping into porous silicon dioxide; s2, adding borax, nano Al2O3, disodium hydrogen phosphate dodecahydrate, polyacrylamide and water, and stirring for dissolving; s3, adding expanded graphite, and grinding; and S4, cooling to obtain the product. The invention aims to solve the key problems of high supercooling degree, phase separation, insufficient phase change latent heat, poor comprehensive performance and the like of the existing phase change heat storage material, and a new material meeting the requirements of building heating, industrial waste heat recovery, solar heat storage and other fields on efficient heat storage and heat management is prepared.

The present application relates to a kind of meloxicam benzene sulfonic acid tablets and its preparation method and application, the meloxicam benzene sulfonic acid tablets include stabilizer, the stabilizer is selected from one or more of anhydrous citric acid, polyethylene glycol, sorbitol, crosslinked povidone, sodium acetate trihydrate, anhydrous sodium acetate, nicotinic acid, nicotinamide, polyacrylic acid resin, ascorbic acid palmitate.The stability of meloxicam benzene sulfonic acid tablets prepared according to the prescription of the present application is significantly improved, while the preparation process is simple, and has good application prospect.

The application relates to a preparation method of an azilsartan solid dispersion and a medicinal composition thereof, and belongs to the technical field of pharmaceutical preparations. A unit dose of the azilsartan solid dispersion comprises azilsartan 20 mg, povidone K30 50-105 mg, sodium acetate trihydrate 4.9-5.7 mg, microcrystalline cellulose 210-270 mg, mannitol 65.6-83.2 mg, and sodium croscarmellose 8-24 mg which is added internally, and the preparation method is wet granulation; a unit dose of the azilsartan medicinal composition comprises the solid dispersion 429.5 mg, sodium croscarmellose 16 mg which is added externally, magnesium stearate 4.5 mg, and film coating premix 18 mg. The preparation process of the azilsartan solid dispersion is simple, almost all pharmaceutical factories have the hardware conditions, and no first and second class organic solvents are used, so that the safety and bioavailability of the azilsartan preparation are effectively improved; the stability of the azilsartan solid dispersion is good, and the dissolution rate and related substances do not obviously decrease after long-time storage.

The utility model discloses a trailer type drainage unit which comprises a trailer chassis, a rectangular box body is fixedly installed on the trailer chassis, a generator set and a storage battery are installed in the box body, supporting legs capable of being adjusted in a lifting mode are arranged at the four corners of the outer side of the trailer chassis, and storage chambers are arranged on the front side and the rear side of the bottom of the box body respectively. The storage chamber is provided with an opening in the side face of the trailer chassis, the upper portion of the opening is provided with a side door capable of being opened and closed in an overturning mode through a hinge, a heat accumulator is installed in the middle of the bottom side of the box body, the heat accumulator is of a closed tank structure and filled with sodium acetate trihydrate, and a plurality of evenly-arranged fin plates are welded to the outer portion of the heat accumulator. The heat accumulator accumulates heat through heat dissipation of the engine, and a through hole communicated with a cavity where the heat accumulator is located is formed in the side face of the storage chamber. The drainage unit is convenient to transport and deploy, can be quickly moved to a place needing drainage in a short time, and is suitable for different operation places and scenes.

The invention relates to the technical field of aluminum electrolysis metallurgy, in particular to an aluminum electrolysis carbon anode anti-oxidation coating and a preparation method thereof. The coating is prepared from the following raw materials in percentage by mass: 45-60% of aluminum oxide powder; 15 to 25% of water glass; 8-12% of potassium feldspar powder; 0.5 to 2% of sodium fluoride; 7-11% of sodium acetate trihydrate; 8-12% of ionized water; the preparation method comprises the following steps: S1, preparing the catalytic compact component; s2, mixing the coating; s3, coating and drying; and S4, carrying out high-temperature calcination. The product provided by the invention has good oxidation resistance, adhesive force and compactness, and the preparation method provided by the invention has the advantages of simple process and low cost.

The application provides a preparation method of high-yield sodium acetate trihydrate, and belongs to the technical field of fine chemical product synthesis. The preparation method comprises the following steps: (1) reacting glacial acetic acid, a sodium-containing alkaline solution and water to obtain an initial sodium acetate solution; (2) reacting the initial sodium acetate solution obtained in the step (1) with a solvent solvent, and performing solid-liquid separation to obtain a solid and a liquid; the solvent solvent is selected from at least one of acetone, ethylene glycol, isopropyl alcohol and ethanol; the mass ratio of the solvent solvent to the initial sodium acetate solution is 0.5-2:1; and (3) washing and drying the solid obtained in the step (2) with a solvent solvent to obtain sodium acetate trihydrate. The sodium acetate trihydrate product with high yield is obtained by adopting a mild reaction temperature and performing the reaction under the action of the solvent with specific types and proportions.

The application relates to a preparation method of a phase change material which can store energy for a long time and release heat in intermittent crystallization, and relates to a preparation method of the phase change material. The application solves the problem that the existing phase change material can only release all stored energy once, and cannot release part of the stored energy in intermittent multiple times. The method is as follows: a melted sodium acetate trihydrate, a polymer monomer, a crosslinking agent and a stabilizer are heated and mixed to obtain a reaction system, an initiator is added into the reaction system, and heat preservation is carried out. The application is used for the preparation of the phase change material which can store energy for a long time and release heat in intermittent crystallization.

The invention discloses a total arsenic online monitoring reagent formula and a preparation method, the total arsenic online monitoring reagent formula comprises a reagent A, a reagent B, a reagent C, a reagent D and a total arsenic standard solution, the reagent A is composed of sulfuric acid, potassium persulfate and pure water, the reagent B is composed of sodium acetate trihydrate, glacial acetic acid, an emulsifier OP-10, silver carbonate, absolute ethyl alcohol and pure water, the reagent C is composed of sulfuric acid, tartaric acid and pure water, and the reagent D is composed of sodium acetate trihydrate, glacial acetic acid, an emulsifier OP-10, silver carbonate, absolute ethyl alcohol and pure water. The reagent D is composed of potassium hydroxide, potassium borohydride and pure water, and the total arsenic standard solution is mother liquor with the concentration of 1000 mg / L. Through the synergistic effect of silver carbonate in the reagent B and the emulsifier OP-10, interference substances such as sulfides and heavy metal ions can be effectively shielded, the relative standard deviation of a monitoring result is smaller than or equal to 5%, and the accuracy of monitoring data is improved.

The invention belongs to the technical field of material chemistry, and discloses a cobalt-doped ferric oxide material and a preparation method and application thereof.The preparation method comprises the following steps that 1, ferric chloride hexahydrate and cobalt nitrate hexahydrate are dissolved in deionized water, absolute ethyl alcohol and sodium acetate trihydrate are added, and stirring is conducted under the room temperature condition till solute is completely dissolved; 2, the precursor solution prepared in the step 1 is placed in an air atmosphere for magnetic stirring, then solvothermal synthesis is carried out, centrifugation, cleaning and drying are carried out after the reaction is finished, and the cobalt-doped ferric oxide material is obtained and comprises a framework formed by ferric oxide nano cubic crystals and a cobalt element, the cobalt element enters the framework to replace part of the iron element to form chemical bonds with the oxygen element, and the degradation rate of bisphenol A within 20 minutes is as high as 100%.

The present application relates to a kind of MVR processing system and method of high-salt wastewater containing sodium acetate and sodium chloride, belong to high-salt wastewater treatment technical field, including the following preparation steps: S1, MVR evaporation stage: high-salt wastewater is added to MVR evaporator and is evaporated, and evaporation liquid is obtained;S2, first crystallization leaching stage: evaporation liquid is cooled and crystallized, and first mother liquor and first crystal are obtained, and the first crystal that is separated out is filtered and leached, and sodium chloride is obtained, and the first leaching liquid after filtration and leaching is transported to MVR evaporator;S3, second crystallization leaching stage: first mother liquor is diluted with water and cooled and crystallized, and second crystal and second mother liquor are obtained, and the second crystal that is separated out is filtered and leached, and sodium acetate trihydrate is obtained, and second mother liquor and the second leaching liquid after filtration and leaching are transported to MVR evaporator.The present application realizes the continuous separate separation of two salt divisions of sodium acetate and sodium chloride, reduces the discharge of waste mother liquor, and meets the concept of energy saving and carbon reduction in the industry.

The application discloses a method for efficiently synthesizing methotrexate, and relates to the technical field of methotrexate preparation. The method comprises the following steps: preparing three intermediates, and then preparing methotrexate by using the three intermediates. In the process of preparing the intermediates, a step of improving the purity of tribromoacetone is added, so that the content of the tribromoacetone is increased from 89-90% to more than 98%, thereby reducing the separation difficulty of the product, reducing the generation of impurities, and improving the yield; in the step of preparing the methotrexate, a new catalyst is used, sodium acetate trihydrate and potassium dihydrogen phosphate are used as a composite catalyst, and the yield of the methotrexate is improved.

A phase change material (PCM) comprises hydrated sodium acetate and a polymeric additive comprising carboxylated, sulphated and / or sulfonated lignin; carboxylated, sulphated and / or sulphonated cellulose; carboxylated, sulphated and / or sulfonated humin; sulphated and / or sulfonated humic acid; and / or humic acid. The PCM may further comprise a nucleating agent e.g. disodium phosphate. The sodium acetate trihydrate-based phase change material (PCM) has improved thermal stability over repeated cycles.

Measuring tool (1), in particular measuring tool (1) for measuring the interior of a footwear, comprising: - a shaped body (10) and - at least one handle (20), wherein the molded body (10) can have at least two states (A, B), wherein in a first state (A) the molded body (10) is plastically deformable and in a second state (B) the molded body (10) is essentially plastically indeformable, wherein the shaped body (10) can be transformed from the first state (A) to the second state (B) by a crystallization process, wherein the shaped body (10) has a shell (15) and a mass of the shaped body (10) located in the shell (15), wherein the shaped body (10) can be transformed from the first state (A) to the second state (B) by a chemical or physical process, wherein the mass in state (A) of the molded body comprises a supersaturated aqueous sodium acetate trihydrate solution.

The application discloses a preparation method of a composite phase change material for solving the supercooling problem of sodium acetate trihydrate, and relates to the technical field of phase change material production, and comprises the following steps: S1, 30 g of natural crystalline bischofite is weighed, dried at 120 DEG C for 12 h, and then dissolved in 90 g of anhydrous ethanol to form a magnesium chloride solution; S2, the magnesium chloride solution is filtered by using a vacuum filtration bottle, and insoluble substances are separated; the ethanol component in the obtained solution after filtration is evaporated by using a rotary evaporator, and a precipitate, magnesium chloride hexahydrate MgCl2.6H2O, is obtained; S3, the magnesium chloride hexahydrate MgCl2.6H2O is combined with sodium acetate trihydrate SAT at an optimized mass ratio of 3:17; and S4, after complete melting and uniformity, 1% sodium polyacrylate PAAS is added as a thickening agent, and the mixture is packaged in expanded graphite EG. The method can realize effective utilization of the by-product bischofite of a salt lake, and simultaneously solve the supercooling problem of SAT.

The invention relates to the technical field of hot compress bags, and particularly discloses a hot compress bag capable of preventing self-activation and a preparation method thereof.Sodium thiosulfate pentahydrate, sodium acetate trihydrate and deionized water jointly form a ternary phase-change material, and compared with a single-component phase-change material, the newly formed ternary phase-change material is low in co-melting point and high in thermal stability; the ternary phase-change material can be kept at a lower temperature without phase change, and the thickening agent is added into the ternary phase-change material and is dispersed in the phase-change material, so that the stability of a phase-change material system is improved, and meanwhile, the intermolecular hydrogen-bond interaction force of the thickening agent hinders crystallization in a cooling process, so that the stability of the phase-change material system is improved. And the system can be kept at a lower temperature without phase change.

The application discloses a sodium acetate and sodium acetate trihydrate production device, which comprises a reaction system, an evaporation system, a crystallization system and a drying system. The reaction system is used for reacting sodium hydroxide solution and acetic acid solution to generate sodium acetate solution. The evaporation system is connected with the reaction system and is used for evaporating and concentrating the sodium acetate solution. The crystallization system is connected with the evaporation system and is used for crystallizing the sodium acetate solution after evaporation and concentration to prepare sodium acetate trihydrate. The drying system is connected with an outlet pipeline of the filter, and is used for drying the solid in the sodium acetate solution after evaporation, concentration and dehydration and the solid of the sodium acetate trihydrate after crystallization and filtration to prepare sodium acetate product and sodium acetate trihydrate product. The sodium acetate and sodium acetate trihydrate production device can simultaneously meet the demand of producing sodium acetate product and sodium acetate trihydrate product, and can timely adjust the production of the sodium acetate product and the sodium acetate trihydrate product according to actual production demand.

The invention discloses a sodium acetate trihydrate-lotus root starch / carbon nanofiber composite phase change material and a preparation method thereof. The preparation method comprises the following steps: step 1, drying carbon nanofibers; step 2, heating and melting sodium acetate trihydrate, adding lotus root starch into the sodium acetate trihydrate in a molten state, and stirring to obtain a sodium acetate trihydrate-lotus root starch system; and step 3, adding the carbon nanofibers dried in the step 1 into the system obtained in the step 2 for impregnation, taking out the phase change material after impregnation, and performing liquid leakage to obtain the sodium acetate trihydrate-lotus root starch / carbon nanofiber composite phase change material. The composite phase change energy storage material disclosed by the invention is high in comprehensive latent heat, high in heat conductivity and good in thermal cycle performance.

The present invention provides a method for preparing high-purity gypsum from phosphogypsum and by-producing sodium acetate trihydrate. The method mainly includes: 1) Dissolving sodium carbonate in water, then adding phosphogypsum, stirring at a constant temperature to carry out a decomposition reaction. After the reaction ends, calcium carbonate residue and sodium sulfate mother liquor are separated; 2) Adding the calcium carbonate residue to acetic acid solution to react to obtain calcium acetate mother liquor and solid residue; 3) Adding the calcium acetate mother liquor to the sodium sulfate mother liquor to react to obtain calcium sulfate dihydrate precipitate and sodium acetate trihydrate mother liquor. After adjusting the pH of the mother liquor, it is concentrated and crystallized to obtain sodium acetate trihydrate product. The present invention uses a chemical method to treat the bulk solid waste phosphogypsum to prepare high-purity gypsum, and at the same time by-produces sodium acetate trihydrate, and develops a low-cost and high-efficiency process for the high-value utilization of phosphogypsum.

The composite coating material of the present invention comprises a three-layer structure. In the middle layer, based on 100 parts by weight of sodium acetate trihydrate, the amount of borax nucleating agent is controlled at 5.1-9.6 parts by weight, which enables the surface temperature of the composite coating material to be controlled at 40±1.5℃, meeting the usage requirements of traditional Chinese medicine ironing.

The invention discloses a modification method of a layered transition metal oxide positive electrode material, which comprises the following steps: (1) preparing nickel acetate tetrahydrate, ferric citrate, manganese acetate tetrahydrate, anhydrous citric acid and sodium acetate trihydrate into a mixed solution, and uniformly stirring in a water bath of 60 DEG C; (2) drying the solution obtained in the step (1) by using a spray dryer to obtain precursor powder, and drying the precursor powder in a 60 DEG C blast oven for one night to obtain powder 1; (3) putting the powder 1 obtained in the step (2) into a tabletting mold, and compacting the powder 1 for 1 minute under different pressures (0MPa, 10MPa, 15MPa and 20MPa) by a tabletting machine to obtain compacted powder 2; and (4) performing heat treatment on the powder 2 in the step (3) to finally obtain materials under different pressures (0MPa, 10MPa, 15MPa and 20MPa). The modification method of the layered transition metal oxide positive electrode material is simple, low in cost and environment-friendly, and meanwhile, the obtained referable modification method is applied to a sodium ion battery positive electrode and can provide excellent cycle stability.

The invention belongs to the technical field of preparation and detection of nano materials, and relates to a cysteine modified ZnFe2O4 nano material for identifying 3-chloropropanol as well as a preparation method and application of the cysteine modified ZnFe2O4 nano material. The method comprises the following steps: firstly, taking ferric chloride and zinc chloride as raw materials, adding sodium acetate trihydrate and polyethylene glycol into an ethylene glycol solvent, heating in a water bath and reacting in an autoclave, and washing and drying to obtain the ZnFe2O4 nanoparticles. And then, mixing the prepared ZnFe2O4 with cysteine according to a ratio, carrying out ultrasonic dispersion and mechanical stirring treatment, centrifuging and drying to obtain the cysteine-coated ZnFe2O4 nano material. The material is high in surface functionalization degree, and can generate specific action with 3-chloropropanol to generate obvious optical or color change, so that rapid, sensitive and visual detection of 3-chloropropanol is realized. The invention has the advantages of simple preparation process, high detection speed, high sensitivity and strong applicability, and is suitable for the fields of food safety, environmental monitoring and the like.

Disclosed herein is a sodium acetate trihydrate-based phase change material (PCM) with improved thermal stability over repeated cycles. More explicitly, disclosed herein is a sodium acetate trihydrate-based phase change material comprising a polymer additive to improve the phase stability of the PCM over repeated melt-freeze cycles by maintaining the bulk PCM in a substantially homogeneous state at all temperatures.

The present application relates to wastewater treatment technical field, particularly to a kind of acetyl methyl amine phosphorus acylation wastewater circulation and resource utilization method, its main content is to first acetyl methyl amine phosphorus acylation wastewater is concentrated to recover the organic matter methanol and dichloromethane in wastewater, the first mother liquor after concentration is cooled crystallization and separation ammonium sulfate, again alkaline solution is reacted with the first mother liquor, ammonia gas produced by heating reaction liquid can be recycled for the neutralization process of acetylation or with water absorption to make ammonia water, after deamination the reaction liquid cooling crystallization obtains sodium acetate trihydrate and second mother liquor, second mother liquor is recycled for the back extraction water of acetyl methyl amine phosphorus after decoloring, this method not only recovers the solvent methanol and dichloromethane in acetyl methyl amine phosphorus acylation wastewater, but also recycles ammonia in the neutralization process of acetylation reaction, and the product quality of sodium acetate trihydrate obtained by crystallization can reach national standard.

This invention relates to the field of battery thermal safety technology, and particularly to a dual-scale encapsulated hydrated salt composite phase change material, its preparation method, battery module, and its application. The invention provides a dual-scale encapsulated hydrated salt composite phase change material, comprising a composite phase change material core and a dense protective layer encapsulated on the outer surface of the composite phase change material core. The raw materials for preparing the composite phase change material core include a eutectic hydrated salt phase change matrix, a thickener, hydrophilic fumed silica, and expanded graphite. The eutectic hydrated salt phase change matrix includes sodium thiosulfate pentahydrate and sodium acetate trihydrate. The dense protective layer is a UV-curable resin layer. The dual-scale encapsulated hydrated salt composite phase change material achieves synergistic optimization of the hydrated salt composite material in terms of low undercooling, high thermal conductivity, leakage resistance, and long-term cycle stability by constructing a dual-scale encapsulation structure of "microscopic adsorption-macroscopic coating."

The application relates to the technical field of phase change energy storage, and discloses a solar heat recovery circulating system based on a phase change material, which comprises a packaging container and a light collecting cover plate located at the upper end of the packaging container, a crystal box is jointly arranged between a second crystal conveying pipe and a first crystal conveying pipe, and the crystal box and the inside of the packaging container are both filled with composite phase change fillers. The composite phase change fillers are simultaneously filled into the packaging container and the crystal box with a grinding function. In each crystallization heat absorption, the composite phase change fillers in the crystal box are added into the packaging container through a second conveying pump and the first crystal conveying pipe, and the composite phase change fillers are mechanically stirred in the packaging container, so that supercooling can be completely eliminated, and the cycle life and the cycle stability are very good. The composite phase change fillers are prepared from nano aluminum nitride, foamed copper, deionized water and sodium acetate trihydrate, and have the characteristics of high latent heat, high thermal conductivity, no phase separation, no supercooling and good stability.

The invention discloses a sodium acetate trihydrate phase change energy storage material with high stability and low supercooling degree, which is prepared from the following raw materials in percentage by mass: 80 to 95 percent of sodium acetate trihydrate, 1 to 7 percent of stirring agent, 3 to 8 percent of auxiliary energy storage material and 1 to 5 percent of thickening agent, the stirring agent is poly (N-isopropylacrylamide); the auxiliary energy storage material is expanded graphite for adsorbing a phase change auxiliary material. The obtained material is low in supercooling degree, good in stability and high in enthalpy value.

The invention discloses a hydrated salt composite phase change film, a preparation method thereof and application of the hydrated salt composite phase change film in thermal management of electronic devices. A hydrated salt composite phase change material (CPCM) is prepared from sodium acetate trihydrate (SAT) / porous expanded graphite (EG) through a vacuum impregnation method. Then, casting a wet film containing polyvinylidene fluoride (PVDF) and N-N dimethylformamide (DMF) in a certain proportion through a scraper and a roller press; the hydrated salt composite phase change film is obtained by immersing a wet film into a deionized water bath and dissolving the wet film with a solvent, the hydrated salt composite phase change film evacuates heat of an electronic device through hydrated salt phase change heat absorption and expanded graphite heat conduction, and the hydrated salt composite phase change film has temperature response flexibility in the phase change process, interface thermal resistance is reduced, and heat dissipation efficiency is improved.

The utility model relates to the technical field of stainless steel chopsticks, in particular to a constant-temperature stainless steel chopstick, which comprises two stainless steel chopstick heads, and each stainless steel chopstick head is provided with an open end and a closed end. Through the arrangement of the stainless steel chopstick head and the sodium acetate trihydrate, the sodium acetate trihydrate can be packaged in the stainless steel chopstick head through the stainless steel sealing pipe, and when the stainless steel chopstick head is in contact with high-temperature food, the sodium acetate trihydrate absorbs heat and begins to melt, so that the temperature of the stainless steel chopstick head is not too high; when the temperature of the food drops, the sodium acetate trihydrate is gradually solidified and releases heat, so that the temperature of the stainless steel chopstick head can be maintained at about 50 DEG C, the situation that the stainless steel chopstick head is in a high-temperature state for a long time is avoided, and the safety and comfort of a user during eating are further improved.

The invention discloses a phase change energy storage composite material and a preparation method and application thereof, the phase change energy storage composite material comprises the following components by mass percentage: 90%-99% of a main body phase change material, 1%-3% of a nucleating agent, 0.15%-4% of a modifier, 0%-5.5% of a lattice structure conditioning agent and 0%-2% of graphite; wherein the main body phase change material is sodium acetate trihydrate, the nucleating agent is dibasic phosphate dodecahydrate or trihydrate salt, and the modifier is selected from one or more of biological polysaccharide, plant extract gum and sodium polyacrylate. Through the synergistic effect of all the components, the phase change energy storage material has the low supercooling degree and the good crystallization characteristic, and then the practicability of the material is greatly improved. In addition, the melting point of the material can be adjusted through the lattice structure regulator, so that the adjustment of a main body phase change point is realized, and the application range of the material is expanded.