20 results about "Sodium Acetate Trihydrate" patented technology

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 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 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 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.

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 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 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.

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 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.

This invention proposes a spherical sodium acetate trihydrate composite phase change material and its microfluidic preparation method. The method includes: mixing and melting sodium acetate trihydrate with a nucleating agent, a thickener, and a thermally conductive filler to form a homogeneous composite liquid; adding the composite liquid dropwise to a silicone oil medium of a specific viscosity using a microfluidic device, utilizing interfacial tension to shape the droplets into spherical shapes and complete controlled phase change solidification; finally, washing and drying to obtain the spherical product. A specific order is used: adding the nucleating agent first, then the thermally conductive filler, and finally the thickener. This invention, through the synergy of microfluidic technology and composite formulation, successfully prepares a composite phase change material with good sphericity and uniform particle size, effectively solving the problems of severe undercooling, easy phase separation, and the inability to controllably prepare spherical particles using traditional methods. The product exhibits low undercooling, high phase change enthalpy, and excellent cycling stability.

This invention discloses a sodium acetate trihydrate / silicon carbide composite phase change material, which is directly synthesized from silicon carbide and anhydrous sodium acetate. During the synthesis process, the silicon carbide particles encapsulate the sodium acetate trihydrate crystals, forming a tight interfacial bond with the sodium acetate trihydrate matrix without interfacial delamination. Simultaneously, the SiC particles act as heterogeneous nucleation sites, effectively promoting the crystallization process of sodium acetate trihydrate, reducing its supercooling to below that of existing technologies, significantly improving the phase change temperature stability of the material, and solving the problem of energy storage and release lag. This invention also discloses a method for synthesizing the sodium acetate trihydrate / silicon carbide composite phase change material, including raw material pretreatment, mixing reaction, crystallization, and post-treatment steps. The direct synthesis method simplifies the process, reduces costs, and improves production efficiency.

The invention relates to the technical field of temperature control equipment, and aims to provide an intelligent temperature control device combining phase change energy storage and wind-solar complementation. The intelligent temperature control device comprises a phase change energy storage module, a wind-solar complementation module, an intelligent control module and a heat exchange system. The phase change energy storage module adopts sodium acetate trihydrate as an energy storage working medium, the phase change temperature range is 0-100 DEG C, and the energy storage density is 220-270 J / g; the wind-solar complementary module comprises a photovoltaic array and a vertical axis wind generating set, and dual-energy cooperative power supply is achieved through an MPPT controller. The intelligent control module is integrated with a PLC (Programmable Logic Controller) general control system and a nanoscale sensor array, and the temperature control precision reaches + / -0.5 DEG C; the heat exchange system is of a liquid-gas double-circulation structure and is provided with a large flat-plate solar heat collector and a liquid damping stirring heating device. Through the design of multi-energy collaborative energy supply, intelligent dynamic regulation and control and efficient heat exchange, the efficient, accurate and stable temperature control effect is achieved, the comprehensive energy efficiency ratio reaches 5.1, the operation cost is reduced by 62%, the annual carbon emission reduction is 188.2 kg, and the system is suitable for the strict requirements of scientific research, electronic manufacturing and other scenes.

This invention provides a sodium acetate trihydrate-based composite phase change material for battery thermal management, its preparation method, and its applications. The composite phase change material specifically comprises: potassium chloride, urea, polyethylene glycol, tetrasodium pyrophosphate decahydrate, expanded graphite, and sodium acetate trihydrate. This invention achieves phase change temperature suitable for lithium battery thermal management through the synergistic regulation of phase change temperature by urea and potassium chloride; reduces supercooling by tetrasodium pyrophosphate decahydrate; inhibits phase separation by polyethylene glycol; and improves thermal conductivity and shape stability by utilizing expanded graphite. The material achieves a thermal conductivity of 1.42 W / (m•K), significantly reduces supercooling, and maintains good stability after 50 melt-solidification cycles. This material can be used for passive thermal management of 46950 cylindrical lithium-ion batteries, effectively reducing battery temperature rise under 1C-3C discharge conditions. Therefore, the composite phase change material of this invention has the characteristics of low supercooling, resolution of severe phase separation, low phase change temperature, and good thermal conductivity.

This invention discloses a method for separating and purifying sodium chloride and sodium acetate from metolachlor wastewater. The method includes: first distilling the metolachlor wastewater and filtering it at 65-80°C to obtain sodium chloride; adding an additive to the filtrate, the additive having a solubility at least higher than that of sodium acetate and not decomposing below 100°C; second distilling and filtering at 65-80°C, the filter cake being a mixed salt; crystallizing and filtering the resulting first mother liquor at room temperature to obtain sodium acetate trihydrate and a second mother liquor; adding methanol to the mixed salt for reflux washing and filtering at 40-50°C to obtain sodium chloride filter cake; distilling the third mother liquor to recover methanol; filtering at room temperature to separate sodium acetate; and returning the fourth mother liquor to the methanol reflux washing section for reuse. The method of this invention has good separation and purification effects, high purity and yield, and is easy to apply in engineering.