10 results about "Anhydrous sodium acetate" patented technology

The application relates to the field of anhydrous sodium acetate drying technology, in particular to an anhydrous sodium acetate drying equipment, which comprises a drying machine body, a feeding port and a discharging port are arranged on the drying machine body respectively, a supporting frame is arranged on the outer side of the drying machine body and close to the feeding port, and a pretreatment shell is fixedly installed on the supporting frame; a feeding mechanism is connected to the top of the pretreatment shell, the feeding mechanism is used for containing anhydrous sodium acetate wet material; a batch processing mechanism is arranged in the pretreatment shell, the batch processing mechanism is used for stirring and crushing the wet material entering the inside of the pretreatment shell; a discharge hopper is communicated with the bottom of the pretreatment shell, and an intermittent discharging mechanism is connected to the discharge hopper, controlled batch processing is formed by cooperation of the pretreatment shell and the batch processing mechanism, the traditional bulk continuous feeding is converted into controlled batch processing, the caking phenomenon of the wet material caused by accumulation before entering the drying machine body is effectively avoided, and the consistency of the feeding is ensured.

This invention belongs to the field of catalytic materials technology, and discloses a NiCo nanosphere alloy catalyst material, its preparation method, and its application. The invention involves dissolving nickel nitrate, cobalt nitrate, and anhydrous sodium acetate in ethylene glycol and stirring vigorously until homogeneous. The homogeneous solution is then transferred to a polytetrafluoroethylene (PTFE) reactor and reacted at an ambient temperature of 25–350°C for 1–120 h. The reaction product is washed, centrifuged, and the resulting pale blue precipitate is dried. The dried pale blue precipitate is then reduced in a tube furnace to obtain a NiCo alloy catalyst material with a nanosphere structure. The synthesis process of this NiCo alloy catalyst material is simple and the conditions are mild. When used for the catalytic hydrogenolysis of lignin to high-value aromatic monomers, the obtained catalyst material exhibits high selectivity for aromatic monomers, and its catalytic performance is comparable to commercially available noble metal catalysts, representing a significant breakthrough in replacing noble metals with inexpensive transition metals.

This invention provides a method for removing impurities from an enoxylation reaction solution, comprising the following steps: (1) adding methanol and anhydrous sodium acetate solution to the enoxylation reaction solution, mixing and precipitating to obtain a solid-liquid suspension; (2) adding purified water to the solid-liquid suspension while stirring, then stopping the stirring and allowing it to stand, removing the supernatant, taking the wet solid, washing with methanol, and drying to obtain dried enoxylated heparin. This method reduces the amount of methanol used, optimizes the impurity removal effect of the enoxylated heparin process, reduces material transfer operations between equipment, optimizes the process flow, improves the yield and production efficiency of enoxylated heparin, and is convenient and safe to operate, suitable for large-scale production.

The invention relates to the technical field of kits, in particular to an oral cavity swab nucleic acid protection liquid and an extraction kit.The oral cavity swab nucleic acid protection liquid is composed of, by weight, 3.5-4.5% of anhydrous sodium acetate, 5-10% of polyethylene glycol, 5-10% of ethylenediaminetetraacetic acid and 5-10% of Tris hydrochloric acid, and the specific content is as follows: the anhydrous sodium acetate is 3.5-4.5%; 6%-8% of ethylenediamine tetraacetic acid; 0.8%-1.2% of Tris hydrochloric acid; 0.8%-1.2% of polyethylene glycol; the nucleic acid extraction method based on the paramagnetic particle method extraction kit is simple and convenient to operate, does not contain toxic reagents such as phenol chloroform and the like, can extract a plurality of samples at one time, realizes rapid diagnosis, simplifies experimental operation steps to the greatest extent, and ensures the safety of experimenters; the kit can meet the requirements of simplicity and convenience in operation, high sample flux and good nucleic acid extraction quality.

The invention discloses a nano-island confinement iron mononuclear site catalyst and a synthesis method and application thereof, and relates to the technical field of water pollution control and resource recovery, the catalyst takes spheroidal C-Fe0 as a nano-island confinement carrier, urea is introduced as a nitrogen source through a calcination process, and is coordinated with Fe atoms in C-Fe0 to form a FeN4 mononuclear site, and the nano-island confinement iron mononuclear site catalyst is prepared. And a space synergistic effect is formed with the nano island confinement carrier. The preparation method specifically comprises the following steps: dissolving anhydrous sodium acetate in a green tea extracting solution, adding an iron nitrate nonahydrate solution, magnetically stirring, and centrifuging, washing and freeze-drying after the reaction is completed to obtain an iron precursor; the preparation method comprises the following steps: mixing an iron precursor with urea, and roasting in an inert gas environment to obtain the nano island confinement iron mononuclear site catalyst marked as C-Fe0-coated FeN4. According to the catalyst, the co-activation capability of PAA and 2, 6-DCP on a C-Fe0-coated FeN4 interface can be enhanced, 2, 6-DCP is induced to be subjected to an efficient oxidative polymerization reaction, and synchronous emission reduction and carbon resource recovery of 2, 6-DCP are achieved.

The invention relates to a stable determination kit for a multi-parameter electrolyte analyzer. The stable determination kit comprises a solution A and a solution B, the solution A is prepared from the following components: 80 to 160 mmol / L of sodium chloride, 2 to 10 mmol / L of potassium chloride, 1 to 10 mmol / L of lithium acetate, 0.1 to 5 mmol / L of magnesium acetate, 0.1 to 4 mmol / L of anhydrous calcium chloride, 10 to 100 mmol / L of anhydrous sodium acetate, 50 to 100 mmol / L of buffer solution, 0.1 to 10 g / L of preservative, 0.1 to 10 g / L of stabilizer and 0.1 to 10 g / L of surfactant. The solution B is prepared from the following components: 10 to 100 mmol / L of sodium chloride, 2 to 10 mmol / L of potassium chloride, 1 to 10 mmol / L of lithium acetate, 0.1 to 5 mmol / L of magnesium acetate, 0.1 to 4 mmol / L of anhydrous calcium chloride, 10 to 100 mmol / L of anhydrous sodium acetate, 50 to 150 mmol / L of buffer solution, 0.1 to 10 g / L of preservative, 0.1 to 10 g / L of stabilizer and 0.1 to 10 g / L of surfactant. The content of K < + >, Na < + >, Cl <->, Ca < 2 + >, Li < + >, Mg < 2 + > and pH in a sample can be tested at the same time, the accuracy, repeatability and recovery rate are not affected when the sample is stored for 24 months at the temperature of 2-37 DEG C, and the raw materials are easy to obtain.

The invention belongs to the field of multienzyme cleaning solutions, and particularly discloses a bubble-free multienzyme cleaning solution, a preparation method and application. The bubble-free multi-enzyme cleaning solution is composed of a certain amount of protease, amylase, lipase, triethanolamine, sodium bicarbonate, anhydrous sodium acetate, a composite surfactant, sodium tetraborate, ethylene glycol, glycerin, a chelating agent, calcium chloride, a penetrating agent, Kathon, a dispersing agent, a defoaming agent, an organic acid corrosion inhibitor and the like, and can effectively remove dirt on the surface of an endoscope, kill bacteria and improve the cleaning effect. The biological membrane removing and bacterium killing rate is not lower than 99%, the biological membrane removing rate is not lower than 99%, and the cleaning agent has the advantages of being free of corrosion, low in foam amount, high in wettability, low in cost, safe and good in cleaning effect; and meanwhile, the physical temperature-resistant stability is good, the storage period reaches 24 months, and the performance stability can be kept for at least 15 days after opening for use.

The invention discloses a preparation method of high-quality anhydrous sodium acetate. Comprising the following steps: dropwise adding alkali liquor into acetic acid or an acetic acid solution in a stirring state to obtain a sodium acetate solution, and preparing anhydrous sodium acetate from the sodium acetate solution by using a spray dryer. The sodium acetate solution is directly subjected to spray drying by using the spray dryer, the solution does not need to be concentrated, crystallized and dried, the operation steps are reduced, the process is simple, the yield is high, and the cost is low. The water content of the prepared sodium acetate powder is less than 1.0%, the sodium acetate content is greater than or equal to 99.0%, and the yield is greater than or equal to 98.5%.

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 application discloses a kapok-derived one-dimensional hollow carbon-based magnetic composite wave-absorbing material and a preparation method thereof, and relates to the technical field of wave-absorbing materials. The preparation method comprises the following steps: step one, removing wax on the surface of kapok fibers; step two, adding iron chloride hexahydrate and cobalt chloride hexahydrate into a mixed solvent of a part of ethylene glycol and diethylene glycol, dissolving, adding the kapok fibers pretreated in step one, and uniformly dispersing; then, adding anhydrous sodium acetate into the remaining part of the mixed solvent of ethylene glycol and diethylene glycol; mixing the two parts of the solvent, carrying out hydrothermal reaction, cooling after the hydrothermal reaction, performing suction filtration, cleaning, drying, and obtaining iron-cobalt composite kapok fibers; and step three, calcining the iron-cobalt composite kapok fibers in step two under Ar atmosphere protection. The wave-absorbing material is light and efficient, has excellent wave-absorbing performance, the kapok fiber raw material has a wide source and is cheap, and the preparation process of the wave-absorbing material is simple, pollution-free and easy to realize large-scale production.