397 results about "Anhydrous sodium acetate" patented technology

The invention discloses a magnetic carbon nanotube composite material and a preparation method and an application thereof. The preparation method comprises the following steps: adding FeCl3.6H2O to an ethylene glycol solution; then adding anhydrous sodium acetate and polyethylene glycol; adding a carboxylated multiwalled carbon nanotube; performing ultrasonic dispersion; adding hexamethylenediamine or ethanediamine; heating to 200-300 DEG C for reaction for 8-24h; and washing and performing vacuum drying to prepare the amino-modified magnetic Fe3O4-carbon nanotube composite material. The amino-modified magnetic Fe3O4-carbon nanotube composite material prepared by the invention is of nanoscale and superparamagnetism, can be stably dispersed in solutions, and can be quickly separated and enriched through a simple action of a magnetic field. As an adsorbent, the material is large in superficial area and has various active groups on the surface. The material can adsorb pigments from complex substrates through pi-pi electron interaction and hydrophobic effect of the carbon nanotube and can adsorb compounds such as organic acids and phenols through weak anion exchange effect of amino groups on the surfaces of magnetic nanoparticles.

The invention relates to a method for preparing graphene / Fe3O4 composite powder by an alcohol thermal method, which comprises the following steps of: (1) weighing oxidated graphite and ferric salt at room temperature, dispersing into a glycol solution, adding polyethylene glycol after dissolving completely, then adding anhydrous sodium acetate, stirring and forming reaction liquid; (2) putting into a reaction kettle, heating to the temperature of 180 to 220 DEG C and reacting for 8 to 16h; and (3) cooling to the room temperature, collecting a product by using a magnet, washing the product by deionized water and drying so as to obtain the graphene / Fe3O4 composite powder. In the invention, the preparation method is simple and is easy for industrialized production; and Fe3O4 in the prepared graphene / Fe3O4 composite powder has pure crystalline phase, little possibility of agglomeration, favorable compounding with graphene and good dispersibility at the surface of the graphene and in the layer of the graphene, and the composite powder has small resistivity and high magnetization intensity.

The embodiment of the invention discloses a preparation method of a nano iron oxide-multilayered graphene composite material. The preparation method comprises the following steps: measuring DMF (Dimethyl Formamide) and distilled water at the volume ratio of 8 to 2, and mixing to obtain a mixed solvent; adding expanded graphite and carrying out ultrasonic vibration for 2 to 7 hours to obtain multilayered graphene; adding ferrous chloride tetrahydrate and anhydrous sodium acetate into a mixed solution and stirring for 3 to 6 minutes; pouring the solution into a hydrothermal reaction kettle; keeping the heat at 100 DEG C to 130 DEG C for 1 to 5 hours and cooling to a room temperature; taking out a reactant, and centrifuging and washing the reactant with alcohol and water for 3 times respectively to obtain the dried nano iron oxide-multilayered graphene composite material. By adopting a method for complexing metal ions through organic molecules, iron nano oxide particles are prepared on the surface of the multilayered graphene without an oxygen functional group; the technical process is simple and is suitable for industrial production.

The invention discloses a method for preparing a hollow spherical ferroferric oxide nano material, which comprises the following steps: dissolving ferric chloride hexahydrate in glycol or diethylene glycol and stirring the solution uniformly, wherein the dosage of the glycol or diethylene glycol is 1 to 4 milliliters of glycol or diethylene glycol per millimol of ferric chloride hexahydrate; dissolving anhydrous sodium acetate or sodium succinate or a mixture of anhydrous sodium acetate and sodium succinate in any ratio in solution prepared by the step 1 and stirring the mixed solution with ultrasonic waves to obtain uniform yellow brown sticky solution, wherein the mass ratio of the anhydrous sodium acetate or sodium succinate to the ferric chloride hexahydrate is 1:1 to 4:1; and transferring solution obtained by the step 2 to a liner of a water hydrothermal kettle, closing the kettle for reaction at 180 to 220 DEG C for 6 to 16 hours, naturally cooling the resulting product to room temperature, taking a sample out of the kettle and washing the sample with water and ethanol sequentially to obtain the hollow spherical ferroferric oxide nano material.

The invention belongs to the technical field of inorganic composite materials and in particular relates to a preparation method of a magnetic bentonite in order to solve the problems of poor uniformity and low magnetism of the magnetic bentonite prepared by a conventional coprecipitation method. The preparation method comprises the following steps of preparing a functionalized zirconium-pillared bentonite material (Zr-B); then dissolving the functionalized zirconium-pillared bentonite material into ethylene glycol; adding anhydrous sodium acetate and polyethylene glycol into the mixture and uniformly stirring; transferring the mixture into a hydro-thermal synthesis kettle; and heating the hydro-thermal synthesis kettle for 8 hours at certain temperature to obtain a functionalized bentonite with magnetism. The magnetic bentonite prepared by the invention has the advantages of simple synthesis, high selectivity and strong enrichment capacity and can be used for removing MC-LR (microcystic toxins) in a polluted water body.

The invention provides a preparation method of magnetic fluorescent composite nanospheres. The preparation method comprises the steps of (1) preparing CdSe quantum dots by taking Na2SO3, selenium powder, cadmium acetate, N-acetylcysteine and deionized water as raw materials; (2) with FeCl3.6H2O sodium acetate anhydrous and ethylene glycol as raw materials, reacting in an autoclave to obtain Fe3O4 nanoparticles; (3) preparing a Fe3O4@SiO2 product by taking the Fe3O4 nanoparticles, tetraethoxysilane, absolute ethyl alcohol, deionized water and ammonium hydroxide as raw materials; and (4) conducting amino modification on the surface of the Fe3O4@SiO2 by utilizing a silane coupling agent KH-550, then loading CdSe onto the surface of the SiO2 through reaction, so as to obtain the final product magnetic fluorescent composite nanospheres. The preparation method has the characteristics that the prepared CdSe quantum dots have excellent water solubility and excellent fluorescent property and are about 3-4nm in diameter; the Fe3O4 nanoparticles are even in particle size and have good dispersity; the Fe3O4@SiO2 nanoparticles have an obvious core-shell structure, shell layers are evenly coated and are consistent in thickness; the magnetic fluorescent composite nanospheres has strong magnetism and excellent fluorescence property and can be used for site-specific drug transportation in a biological body and the fluorescence imaging of the biological body.

The invention relates to a simple preparation method of a cobalt nickel sulfide nanosheet serving as a supercapacitor electrode material by adoption of a simple two-step solvothermal technique. The simple preparation method of the cobalt nickel sulfide nanosheet serving as the supercapacitor electrode material includes: adopting transition metal salt cobalt nitrate, nickel nitrate and anhydrous sodium acetate as reaction raw materials, and respectively adopting polyethylene glycol, ethylene glycol and ethyl alcohol as solvents and taking TAA (thioacetamide) as a sulfur source to prepare the cobalt nickel sulfide nanosheet according to a two-step solvothermal method. The cobalt nickel sulfide nanosheet prepared according to the method has advantages of high repeatability, simplicity in synthesis process, easiness in control and high yield. The laminar structure is beneficial to surface quick action of electrolyte ions and electrodes, efficient charging and discharging are benefited, and a high specific capacity can be provided.

The invention belongs to the technical field of pesticide residue detection, and relates to a method of detecting pesticide residues in a healthcare product. A detection process includes sample preparation, GC-MS detection and LC-MS / MS verification. The method includes subjecting the healthcare product and acetonitrile to ultrasonic wave processing or homogenizing, centrifuging by adopting anhydrous magnesium sulfate, anhydrous sodium acetate and an adsorbent to extract a detection sample, subjecting the detection sample to vacuum concentration until the sample is dry, adding acetone, dissolving with a vortex machine and an ultrasonic cleaner, filtering with an organic phase filtration membrane to obtain a solution for GC-MS detection, and when the GC-MS detection result shows that the detection sample contains the pesticide residues, filtering with the organic phase filtration membrane to obtain a solution for LC-MS / MS verification to verify whether the detection sample contains the pesticide residues. The method rapidly and accurately detects the pesticide residues in the healthcare product through adopting the GC-MS and the LC-MS / MS, reduces consumption of organic solvents, and is good in reproducibility, simple in detection process, scientific and reasonable in principles, convenient in operation, safe, reliable, low in detection cost, accurate in result and environmental friendly.

The invention relates to a method for preparing magnetic nanometer composite material of a nickel-zinc ferrite (Ni1-xZnxFe2O4) wrapping carbon nano tube, which comprises the following steps: (1) weighing the carbon nano tube to put into a three-necked flask, adding strong oxidizing property acid, and performing ultrasonic dispersion; and (2) dispersing the carbon nano tube after the acidizing process inside glycol solution at a room temperature, weighing malysite, zinc salt and nickel salt to dissolve inside the solution, adding polyethyleneglycol after the mixture dissolves completely and sodium acetate anhydrous to be stirred mechanically, putting the mixture after complete dissolution inside a high pressure reaction kettle, cooling the kettle to the room temperature, washing and collecting products, and drying the products. The method has simple preparation technique, low requirement on the production equipment, and easy industrial production. The prepared magnetic nanometer composite material has pure crystalling phase, good dispersibility, poor agglomeration, high intensity of magnetization and high magnetic induction sensitivity.

The invention discloses a CoNiFe-LDH / multilayer graphene high-performance composite energy storage material and a preparation method thereof. the preparation method comprises the steps of: measuring DMF and distilled water with a volume ratio of 8:2, and mixing the DMF and the distilled water to serve as a mixed solvent; adding expanded graphite into the mixed solvent, carrying out ultrasonic processing on the solution for 2 to 4 hours to obtain a multi-layer graphene mixed solution; adding cobalt acetate tetrahydrate, ferrous chloride tetrahydrate, nickel chloride hexahydrate and anhydrous sodium acetate into the mixed solution, stirring the solution for 5 to 10 minutes, pouring the solution into a hydrothermal reaction kettle, maintaining the temperature of the solution at 120 DEG C for1 hour, and then cooling the solution to room temperature; taking out a reactant and centrifugally washing the reactant with alcohol and water for three times, and drying the reactant in a 60 DEG C oven for 24 hours to obtain a dry CoNiFe-LDH / multilayer graphene composite material. According to the CoNiFe-LDH / multilayer graphene high-performance composite energy storage material and the preparation method thereof, a method of complexing metal by means of organic molecules is adopted for preparing laminar multi-element metal hydroxide ont eh surface of multilayer graphene which does not containoxygen functional groups, and the process is simple and suitable for production.

The invention relates to an alcohol-thermal method for preparing a carbon nano tube (MWCNTs) / manganese-zinc ferrite (Mn1-xZnxFe2O4) magnetic nano-material. The method is mainly characterized in that the carbon nano tube, soluble malysite, zinc salt and manganese salt are taken as initial raw materials, and acid with strong oxidizing property is firstly used for acidizing the surface of the MWCNTs,; the acidized MWCNTs is dispersed into glycol solution, and then the malysite, the zinc salt, the manganese salt, anhydrous sodium acetate and dispersant polyethylene glycol are added in; and the lcohol-thermal method is adopted for preparing the (MWCNTs) / Mn1-xZnxFe2O4 magnetic nano composite material. The prepared (MWCNTs) / Mn1-xZnxFe2O4 magnetic nano composite material has pure crystalling phase, good dispersivity, high magnetization, strong magnetic induction sensitivity and simple preparing technique, and is not easy to agglomerate, thus being simple in the requirements for the production equipment and easy for commercial process.

The invention relates to a method for preparing cobalt-doped zinc oxide (CoxZn1-xO) multifunctional magnetic nano powder by an alcohol heating process, which comprises the following steps of: (1) dissolving soluble cobalt salts and zinc salts in glycol at room temperature, mechanically stirring, adding anhydrous sodium acetate and polyethylene glycol, and carrying out ultrasonic dispersion to obtain a reaction solution; (2) carrying out alcohol heating reaction on the reaction solution at 180-220 DEG C for 10-14 hours, and naturally cooling to room temperature; (3) and centrifuging the product, washing and drying to obtain the CoxZn1-xO multifunctional magnetic powder. The method has the advantages of simpleness and low cost and is suitable for industrial production; and the prepared CoxZn1-xO nano powder has the advantages of pure crystalline phase, uniform size and good dispersibility, can not easily conglobate, has excellent room temperature ferromagnetism and photocatalysis, and shows obvious magnetic field response under the action of an external magnetic field.

The invention discloses a method for preparing a peanut shell activated carbon-based magnetic Cr(VI) adsorbent. The method specifically comprises the following steps: washing peanut shells, drying and grinding to obtain the needed particle size; then, calcining the peanut shell powder under liquid N2 protection, thereby obtaining an activated carbon precursor; dipping in KOH in a static state, drying, calcining in an N2 atmosphere, washing the calcined product, performing vacuum drying, thereby obtaining activated carbon; dispersing the activated carbon in ethylene glycol, adding ferric chloride hexahydrate and anhydrous sodium acetate, mixing and stirring, performing hydro-thermal treatment, washing the product, and performing vacuum drying, thereby obtaining the peanut shell activated carbon-based magnetic Cr(VI) adsorbent. The method disclosed by the invention has the advantages that the magnetic activated carbon which is easily separated after Cr(VI) adsorption is prepared by taking cheap and readily available peanut shells as raw materials, the magnetic activated carbon has the advantages of high specific surface area, good adsorptive property, excellent recycling performance and the like, the defect that magnetic particles easily drop is overcome, and the removal rate of over 90.6% also can be reached after recycling for four times.

The invention relates to 3D direct writing zirconium oxide ceramic ink, which comprises zirconium oxide particles, a solvent, a binder, a dispersant and a salt, wherein the particle size of the zirconium oxide particles is 0.1-2 [mu]m, the solid content of the zirconium oxide particles in the ink is 40-58 vol%, the dispersant is one or a variety of materials selected from polyacrylic acid, polyvinyl acid, ammonium polyacrylate, polyvinyl acid salt, polyacrylate, polycarboxylate and polyacetyl imine, the dispersant accounts for 0.1-2% of the mass of the zirconium oxide particle dry powder, andthe salt is one or a variety of materials selected from ammonium chloride, zinc acetate, sodium chloride, magnesium chloride, potassium chloride, barium chloride, ammonium bicarbonate, anhydrous calcium chloride, potassium carbonate, sodium bicarbonate, sodium carbonate, anhydrous sodium carbonate, anhydrous sodium acetate, anhydrous calcium chloride, copper sulfate, basic copper carbonate, ammonium sulfate, ammonium bicarbonate, potassium aluminum sulfate and sodium citrate, and accounts for 0.001-0.1% of the mass of the ink. According to the present invention, the 3D direct writing zirconiumoxide ceramic ink can be printed at the room temperature, has high solid content while can flow out of the fine spraying nozzle and cannot cause the clogging, can be quickly cured into the fine wirewith a certain strength, and has good rheological property.

The invention relates to a method for preparing ganciclovir. The method comprises the following steps of: a, adding paraformaldehyde into 1,3-dichloro-2-propanol [2], reacting under the action of a catalyst to obtain hemiformal [3], and reacting with an acetic anhydride to obtain 1,3-dichloro-2-acetoxylmethoxylpropane [4]; b, making 1,3-dichloro-2-acetoxylmethoxylpropane [4] react with absolute postassium acetate or anhydrous sodium acetate in an organic solvent medium in the presence of a tetraalkyl ammonium bromide catalyst with 1-20 carbon atoms and an acetic anhydride serving as a dehydrating agent to obtain 1,3-diacetoxy-2-acetoxymethoxyl propane [5]; c, performing a condensation reaction on 1,3-diacetoxy-2-acetoxymethoxyl propane [5] and 2,9-diacetyl guanine [6] in an organic solvent medium in the presence of a catalyst and an acetic anhydride serving as a dehydrating agent to obtain triacetyl ganciclovir [7]; and d, hydrolyzing the triacetyl ganciclovir [7] to obtain ganciclovir [1]. The method has the advantages of easy and controllable preparation process, high utilization ratios of raw materials, low cost and high yield of a prepared ganciclovir product.

The invention relates to a method for preparing cobalt-nickel ferrite / graphene magnetic nanocomposite powder by alcohol thermal method, comprising: (1) dispersing graphite oxide and metal salt into ethylene glycol solution respectively at room temperature, and waiting After dissolving, add polyethylene glycol and anhydrous sodium acetate to the metal salt solution, stir and mix the graphite oxide solution and the metal salt solution to form a reaction solution; (2) Pour the above reaction solution into the reaction kettle and heat up to 180-220 °C, react for 8-16 hours; after the reaction, cool to room temperature, collect the product with a magnet, wash with deionized water and absolute ethanol, and dry to obtain the product. The invention has simple process, low requirements on production equipment, and is easy for industrialized production; the prepared cobalt-nickel ferrite / graphene magnetic nanocomposite powder is well compounded with graphene, and has good dispersibility on the surface and layer of graphene, and the composite powder The volume resistivity is small, the magnetization intensity is high, and it has a good application prospect.

The invention provides a crystallization method for concerting cefotaxime acid to sodium salt; the method comprises the steps: water, acetone and anhydrous sodium acetate are added into a three-necked bottle; cefotaxime acid is added into the three-necked bottle after the temperature is lowered; then, the mixture in the three-necked bottle is stirred to cause the mixture to dissolve; next, added with active carbon, stirred, filtered and washed with acetone; the filter liquor is combined, added with acetone by dripping and added with crystal seeds, crystallized, stirred, added with acetone by dripping again, cooled, crystallized, filtered, soaked and washed with acetone for twice and dried in vacuum to obtain cefotaxime sodium crystal. The crystallization method has the advantages of simple menstruum, simplicity and feasibility, low cost, good crystal forms, good mobility, easy sub-package, high clarity and good color grade, thus being suitable for large-scale promotion and application and having obvious economic benefits.

The invention relates to an additive for acidic texturing liquid of polycrystalline silicon wafers and an application thereof. The additive comprises the following components: pentaerythritol, anhydrous sodium acetate, polyethylene glycol and deionized water. An acidic texturing method using the additive comprises the following steps: 1) dissolving pentaerythritol, anhydrous sodium acetate and polyethylene glycol in deionized water to prepare the additive; 2) dissolving hydrofluoric acid and nitric acid in deionized water to prepare a mixed acid solution, and then, adding the additive into the mixed acid solution to obtain acidic texturing liquid; 3) soaking a mortar cut polycrystalline silicon wafer or a diamond wire cut polycrystalline silicon wafer in the acidic texturing liquid for texturing. By adopting the additive provided by the invention, after the texturing operation, the reflectivity of the diamond wire cut polycrystalline silicon wafer is about 6% less than the reflectivity of the diamond wire cut polycrystalline silicon wafer in a conventional texturing process, and the reflectivity of the mortar cut polycrystalline silicon wafer is about 3-5% less than the reflectivity of the mortar cut polycrystalline silicon wafer in the conventional texturing process.

The invention relates to a chemical synthetic method, and concretely relates to a synthetic method of a perfume o-tert-butylcyclohexyl acetate. The synthetic method comprises the following steps: reacting a raw material phenol with isobutene under the catalysis of anhydrous aluminum trichloride to obtain o-tert-butyl phenol, carrying out catalytic hydrogenation of o-tert-butyl phenol under the catalysis of Raney nickel to obtain o-tert-butyl cyclohexanol, and carrying out an esterification reaction of o-tert-butyl cyclohexanol and acetic anhydride under the catalysis of anhydrous sodium acetate to obtain o-tert-butylcyclohexyl acetate. The method has the advantages of mild reaction conditions, safe and convenient operation, high reaction yield, fine and strong fragrance of the obtained product, raw material source enlargement and raw material cost saving because of the adoption of industrially cheap phenol and isobutene as initial raw materials, total synthetic reaction yield improvement, suitableness for the industrial adoption, and good economic benefit.

The invention relates to an ionic liquid functionalized magnetic nanoparticle and a preparation method and application thereof. FeCl3.6H2O and anhydrous sodium acetate are dissolved in glycol, and react under 200 DEG C, so that Fe3O4 magnetic nanoparticles are obtained; the Fe3O4 magnetic nanoparticles are weighed and mixed with H2O and ethanol, pH is regulated to 9 to 10, tetraethoxysilane is added for reaction, and after vacuum drying, Fe3O4 / SiO2 is obtained; the Fe3O4 / SiO2 is dispersed and suspended in toluene, and after 3-chloropropyltrimethylsilane and triethylamine are added for reaction, chloropropyl magnetic nanoparticles are obtained by way of vacuum drying; the chloropropyl magnetic nanoparticles are added into toluene, N-alkylimidazole derivative is added for reaction, and after vacuum drying, the ionic liquid functionalized magnetic nanoparticles are obtained. When being used for separating target standard protein, the ionic liquid functionalized magnetic nanoparticle has the characteristics of good selectivity and high adsorbing capacity, and cannot contaminate target separated product.

The invention discloses a group enhanced type magnetic nanometer water treatment agent and a preparation method and application thereof. The preparation method is characterized by comprising the following steps: accurately weighting hexahydrate ferric chloride and anhydrous sodium acetate as reaction raw materials; firstly, dissolving the raw materials into ethylene glycol; then, adding polyethylene glycol to disperse; adding solution into a high-pressure reaction reactor container to react; carrying out magnetic adsorption to obtain Fe3O4 magnetic nanoparticles; taking ethyl orthosilicate as a silicon source to enable silicon dioxide to cover the surface of the Fe3O4 magnetic nanoparticles; taking silane coupling agent as an amino source to graft an -NH2 group to the surface of the silane coupling agent to obtain Fe3O4@SiO2-NH2 magnetic nanoparticles; finally, under a constant temperature, stirring to modify the amino and sulfydryl group of cysteine on the surfaces of the Fe3O4@SiO2-NH2 magnetic nanoparticles to obtain group-enhanced magnetic nanometer water treatment agent Fe3O4-SiO2-NH2-L-Cys. The preparation method has the advantages of simpleness in preparation process operation and easiness in realizing reaction conditions. In addition, the group enhanced type magnetic nanoparticles prepared with the preparation method has the advantages of narrow particle size distribution, good stability, good adsorption function for various heavy metal ions and high adsorption efficiency.

The invention relates to a method for preparing a multiwall carbon nano-tube (MWCNTs) / cobalt zinc ferrite (Co1-xZnxFe2O4) magnetic nanocomposite material, which comprises the following steps of: (1) mixing a strong oxidizing acid and MWCNTs in a mass ratio of 1:200-1:400 and reflowing the solution in an oil bath after ultrasonic dispersion; and (2) dispersing the acidized MWCNTs into solution of ethylene glycol at room temperature, weighing a ferric salt, a zinc salt and a cobalt salt, dissolving the salts into the solution, adding polyethylene glycol and anhydrous sodium acetate after the added salts are fully dissolved, mechanically stirring the mixture, putting the mixture into a high-pressure reaction kettle for reaction after polyethylene glycol and anhydrous sodium acetate are fully dissolved, cooling the mixture to room temperature, and washing, collecting and drying a product. The magnetic nanocomposite material prepared by the method has the advantages of pure crystalline phase, high dispersibility, difficult agglomeration, high magnetization intensity and high magnetic induction sensitivity; and the method has the advantages of simple preparation process, relatively lower requirements on production equipment and easy industrial production.

The present invention relates to a preparation method of X-ray contrast agent ioversol. The method adopts 5-chloroacetamino-N,N'-bis(2,3- dihydroxypropyl)-2,4,6-triodo-1,3-phthalamine and chloroethanol to make them implement alkylation reaction in the presence of inorganic alkali to obtain reaction liquor, said reaction liquor has no need of separation, and the anhydrous sodium acetate can be directly added to make reaction.

The invention provides an asymmetric thermal-excitation delayed fluorescence diphenyl ether aromatic phosphine oxide material and a synthetic method and application thereof and aims at solving the technical problem that the thermal-excitation delayed fluorescence diphenyl ether aromatic phosphine oxide material is large in polarity, is easily quenched and is strong in intermolecular effect. The asymmetric thermal-excitation delayed fluorescence diphenyl ether aromatic phosphine oxide material is formed by introducing 2, 3 or 4 diphenylphosphine oxygen groups to 2, 2', 4 and 4' positions of diphenyl ether. The synthetic method comprises the steps of mixing bromo-diphenyl phosphine oxide phenylate, diphenylphosphine, anhydrous sodium acetate, palladium acetate and DMF, pouring a mixture into icy water to perform extraction, obtaining an organic layer for oxidation and performing extraction, drying and purification. The asymmetric thermal-excitation delayed fluorescence diphenyl ether aromatic phosphine oxide material can effectively inhibit mutual intermolecular effect and accordingly inhibit quenching effect. The asymmetric thermal-excitation delayed fluorescence diphenyl ether aromatic phosphine oxide material serves as a light-emitting layer and used for preparing electro-phosphorescence devices.

The method for synthesizing L-butyl lactate with high yield and high optical purity uses concentrated sulfuric acid as catalyst, the added quantity of the concentrated sulfuric acid is 1.5% of lacticacid mass, the mole ratio of the n-butyl alcohol and lactic acid can be 0.5-4, reaction temp. is 50-150 deg.c, after the reaction is completed the solid anhydrous sodium acetate, solid anhydrous sodium carbonate, solid anhydrous sodium hydroxide or solid anhydrous sodium hydroxide can be directly added to neutralize sulfuric acid, then the above-mentioned material is filtered and separated so as to obtain the invented product. Its yield rate is up to above 90% and its optical purity is up to above 99.5%.

The invention relates to a preparation method of graphene magnetic aerogel with high adsorption performance. The preparation method comprises the following steps: preparing Fe3O4 magnetic nanoparticles from anhydrous sodium acetate, polyvinylpyrrolidone, ferric chloride hexahydrate and ethylene glycol; pre-oxidizing crystalline flake graphite by using a pre-oxidation method, and then preparing a graphene oxide solution by using an improved Hummers method; compounding Fe3O4 and graphene through a solvothermal method, and preparing a graphene magnetic hydrogel through reduction; and finally, preparing a graphene magnetic aerogel material through a freeze drying method. Adsorption experiments show that the prepared graphene magnetic aerogel has the advantages of high adsorption capacity, highsurface area and the like, and is greatly improved in adsorption performance on pollutants such as dyes, organic solvents, heavy metal particles and the like, so the graphene magnetic aerogel has good application prospects in the fields of sewage treatment and the like.

The invention discloses a carbon nanometer fiber / ferrite composite absorbing material and a preparation method thereof, and relates to the absorbing material preparation technology; the method comprises the following steps: weighting ferric salt to be resolved in glycol; adding one or more from a group formed by zinc salt, nickel salt, magnesium salt, copper salt, and cobalt salt; adding bacteria cellulose for ultrasonic dispersion; adding waterless sodium acetate and dispersant; carrying out mechanical stirring and ultrasonic dispersion; adding mixture ina reaction vessel after powders are completely solved; natural cooling to room temperature after reaction is done; using deionized water to wash; drying; using high temperature carbonization to process dried composite so as to obtain the composite absorbing material with ferrite uniformly arranged in a carbon nanometer fiber three dimensional network; the preparation process is green and environmental protection, simple and easy, convenient in operation, low in cost, and the obtained composite absorbing material is strong in electromagnetic wave absorption, wide in absorption frequency band width, excellent in mechanical property and thermally-stabilised performance, and is ultrathin and super light.

The invention discloses an inorganic-organic compound environment-friendly snow-melting agent. The inorganic-organic compound environment friendly snow-melting agent comprises the following components in parts by weight: 10-20 parts of anhydrous magnesium chloride or / and anhydrous calcium chloride, 10-20 parts of anhydrous sodium acetate or / and anhydrous potassium acetate and 0.1-5.0 parts of zinc sulphate. After the snow-melting agent disclosed by the invention is dissolved in water or snow, a freezing point of the snow-melting agent is below 0 DEG C, the freezing point of the anhydrous magnesium chloride after being dissolved in the water is minus 33 DEG C, and magnesium in underground water is increased, so as to be beneficial to human body; the freezing point of the anhydrous calcium chloride after being dissolved in the water is about minus 20 DEG C, and calcium in the underground water is increased, so that influence to human body is less; and the freezing point of acetic acid is about minus 30 DEG C; and a solidifying point of saline water is lower than that of the water, so that an ice cake is hardly formed after salt is dissolved in snow water. According to the inorganic-organic compound environment friendly snow-melting agent, the zinc sulphate forms a protective film on carbon steel, so that chloride ions can not corrode a metal bridge or a concrete pavement.

The invention discloses a multicolor fluorescence material based on a rare-earth metal organic frame, a preparation method of the multicolor fluorescence material and application of anti-counterfeiting ink. The multicolor fluorescence material is prepared by uniformly mixing rare earth, a nitrate solution, 1,3,5-benzene tricarbonic acid, anhydrous sodium acetate, absolute ethyl alcohol, N,N-dimethylformamide and deionized water to obtain a mixture, placing the mixture in an oven to react at the temperature of 75 DEG C to obtain a reaction product, taking out the reaction product and centrifuging, washing with deionized water and absolute ethyl alcohol, drying, and grinding, wherein the rate earth is yttrium, terbium and europium. The material is synthesized by simple conditions, is high inillumination brightness, and can realize light color adjustment from green to red, a preset anti-counterfeiting pattern with a specific color or mixed color is printed by an ink-jet printer, the printed pattern is hidden in the sun, and the problem that the hiding performance is low in anti-counterfeiting printing is solved. In the anti-counterfeiting verification, the pattern is stimulated by a254 nm ultraviolet lamp, the preset specific color or the mixed color is displayed, and a better anti-counterfeiting effect is achieved.