44results about How to "The reaction raw materials are simple" patented technology

The invention relates to a preparation method of nanometer strontium titanate with lactic acid aid. The invention takes strontium salt and butyl titanate as materials, lactic acid as solvent and inhibitor, and takes a small amount of water to promote hydrolyzing. The procedures of the invention are as follows: Firstly, strontium titanate is dissolved in the lactic acid, and then is added with the solvent of the butyl titanate slowly with violent stirring, and is kept still, thus homogeneous and transparent gel is obtained. The gel is calcineed at a high temperature, thus nanometer strontium titanate power is obtained. The composition components of the invention are less, can be got easily and are environment friendly without pollution. The lactic acid acts as the solvent of the strontium salt and as the inhibitor of the butyl titanate, and can well control the sol-gel process; therefore, the productive rate of the nanometer strontium titanate power prepared by the method is increased. The invention needs only 80 ml of gel for to make 0.1 mol of SrTiO3r. The proposal has a wide application and is suitable for the preparations of nanometer barium titanate and nanometer barium strontium titanate, etc.

The invention relates to an ultra-pure silver powder preparation method capable of controlling the particle size. The preparation method comprises the steps of (1) preparing a silver nitrate solution, wherein the concentration of silver nitrate in the solution is 1.2 to 1.5 mol / L; (2) adding aqueous ammonia into the silver nitrate solution prepared in the step (1), and adjusting the pH to be 8 to 9; (3) dripping a hydrazine hydrate aqueous solution with the concentration of 40% to 80% into the silver nitrate solution in the step (2) at the speed of 0.1 to 1 mL / min, so as to obtain silver powder slurry; and (4) filtering the silver powder slurry obtained in the step (3), washing the filtered silver powder slurry with deionized water for three times, and drying wet silver powder obtained after filtration under nitrogen protection to obtain silver powder. According to the preparation method, during the preparation process of ultra-pure silver powder, any protective agent and dispersing agent are not added in the reaction system, and organic matter residues are avoided; and when hydrazine hydrate is used for reducing silver nitrate, the reaction speed of silver nitrate reduction through hydrazine hydrate is accurately controlled through accurately controlling the flow of the hydrazine hydrate aqueous solution, so that the particle size of the ultra-pure silver powder is accurately controlled.

The invention relates to a method for preparing a slump loss-resistant type polycarboxylic acid water reducer by silanizing a terminal group of amino polyether. The method provided by the invention takes an amino polyether type compound, a silane coupling agent, an unsaturated carboxylic acid type monomer and the like as main reaction raw materials and a polycarboxylic acid water reducer is prepared through firstly hydrolyzing, substituting, then carrying out condensation, and finally copolymerizing; the method comprises the following steps: firstly hydrolyzing by a halogenated silane coupling agent; then taking the silane coupling agent and the amino polyether type compound to be subjected to substitution reaction; carrying out the condensation on a substituted product and a vinyl silane coupling agent hydrolyzed product; taking a condensed product and unsaturated polyoxyethylene ether, a molecular weight regulator and the unsaturated carboxylic acid type monomer to be subjected to free-radical copolymerization reaction under the action of an initiator to prepare the polycarboxylic acid water reducer with a plurality of branched silane modified polyether side chains. The method provided by the invention has the advantages of simple and easy-to-control process, low cost, energy saving and high efficiency, environmental protection and no pollution; dual modification of the side chains of a main chain of a polycarboxylic acid molecule is successfully realized and more excellent water reduction and slump loss resistance performance, which is better than that of a common polycarboxylic acid water reducer, is represented.

The invention discloses a preparation method of a 5-maleimide chromone compound. The preparation method comprises the steps that in a DCE solvent, [Ru(p-cymene)Cl2]2 and AgNTf2 are used as catalysts,silver acetate serves as an additive, a maleimide compound and a chromone compound are taken as substrates, and the 5-maleimide chromone compound is synthesized. According to the preparation method ofthe 5-maleimide chromone compound, the reaction raw materials are low in cost and easy to obtain, the preparation method is simple, ruthenium is used as a catalyst, the reaction cost is low, the reaction time is short, the yield is high, operation is easy, and the preparation method is suitable for synthesis of different types of 5-maleimide chromone compounds. The preparation method can be usedfor synthesizing a series of 5-maleimide chromone compounds, and synthesized products can serve as intermediate compound, and can also be used for further constructing complex active compounds; and meanwhile, the compounds have great medicine activity potential.

The invention relates to the field of chemical engineering, especially to a synthetic method of glyoxylic ester. According to the synthetic method, glyoxalic acid and alcohol undergo an esterification reaction under catalysis of a catalyst in the presence of a water-carrying agent so as to obtain glyoxylic ester. The catalyst is acid, and the water-carrying agent is hydrocarbon. By the synthetic method, yield of a route product is high, content of a gas phase is high, and side reaction is few. There is no need to use heavy metal or other oxidizing agent. The reaction process is safer, and environmental pollution is avoided. Reaction materials are simple and easily available and are common technological raw materials. By the synthetic scheme, synthesis of glyoxylic ester can be industrialized. The synthetic method has cost advantage. Cost of glyoxylic ester is greatly reduced. The synthetic method provides conditions for slathering glyoxylic ester at the industrial level. In addition, quality of the product is better than quality of a commercially available reagent, and gas phase content of the product is far higher than gas phase content 92% of a commercially available reagent.

The invention provides a preparation method of an aluminum oxide coated silicon cathode material. The preparation method comprises the following steps: (A) in an oxygen-containing atmosphere, carrying out heat treatment of 500-1000 DEG C on nanometer silicon powder to obtain preoxidized nanometer silicon; (B) mixing the preoxidized nanometer silicon with aluminum powder and tin powder, and carrying out heat treatment of 400-900 DEG C to obtain an intermediate; and (C) treating the intermediate with acid or an oxidant to obtain the aluminum oxide coated silicon cathode material. In the preparation method, the thickness of an aluminum oxide coating layer can be controlled by adjusting the technological conditions of nanometer silicon preoxidization; the reaction raw materials are simple, flammable and combustible organic reactants and complex vacuum systems do not need to be used in the preparation process, the operation process is simple and practicable, the practicability degree is high, and the cost is low. The silicon substrate cathode material prepared and obtained by the preparation method has more stable surface structure in the lithium deembedding and embedding process, and is high in capacity retention ratio, high in cycling stability and high in performance.

The invention mainly relates to a synthesis method of 2,5-disubstituted-1,2,4 thiadiazole-3 (2H)-thione and derivatives thereof. The 2,5-disubstituted-1,2,4 thiadiazole-3 (2H)-thione and the derivatives thereof are prepared from oxime lipid compounds, phenyl isothiocyanate compounds and elemental sulfur by a one-pot method under the promotion of an alkali in an oxygen atmosphere. The product withstable molecular structure and excellent chemical properties and the additional products thereof are prepared. The method does not need transition metal catalysis, and provides a new path for the synthesis of the 2,5-disubstituted-1,2,4 thiadiazole-3 (2H)-thioketone compounds. The method has the characteristics of simple reaction system, mild reaction conditions, less reaction equipment, simple and convenient experimental operation, medium and partial yield and the like.

The invention relates to a method for preparing FexPO4 by electrolyzing ferrophosphorus, which comprises the following steps: by using ferrophosphorus as the anode and providing an oxygen source by using oxygen in water as the product, electrolyzing to obtain a FexPO4 solution, wherein only ferrophosphorus and water are consumed in the reaction process; adding basic oxides to regulate the pH value of the solution so as to settle out FexPO4; and granulating, filtering and washing to obtain the finished FexPO4 product. In the method, cheap ferrophosphorus is converted into high-value FexPO4 by using the electrolytic reaction process; the source of ferrophosphorus is not limited; the influence of impurity elements on the product can be eliminated; the product can be granulated into controlled shape and particle size; the byproduct H2 can be recycled; the treated filtrate can be used cyclically; the obtained finished FexPO4 product has the advantages of high purity, small particle size, easily controlled shape, and low power consumption; the reaction process has low requirements for equipment and is easy to operate; and the preparation method has the advantages of simple technique, high resource utilization rate, low cost, low investment, good benefit, high cleanness and environmental protection, can be easily industrialized, and is suitable for high-value comprehensive utilization of byproducts in chemical industry and large-scale industrial low-cost clean production of high-end phosphates.

The invention relates to a preparation method of nanometer strontium titanate with lactic acid aid. The invention takes strontium salt and butyl titanate as materials, lactic acid as solvent and inhibitor, and takes a small amount of water to promote hydrolyzing. The procedures of the invention are as follows: Firstly, strontium titanate is dissolved in the lactic acid, and then is added with the solvent of the butyl titanate slowly with violent stirring, and is kept still, thus homogeneous and transparent gel is obtained. The gel is calcineed at a high temperature, thus nanometer strontium titanate power is obtained. The composition components of the invention are less, can be got easily and are environment friendly without pollution. The lactic acid acts as the solvent of the strontium salt and as the inhibitor of the butyl titanate, and can well control the sol-gel process; therefore, the productive rate of the nanometer strontium titanate power prepared by the method is increased. The invention needs only 80 ml of gel for to make 0.1 mol of SrTiO3r. The proposal has a wide application and is suitable for the preparations of nanometer barium titanate and nanometer barium strontium titanate, etc.

The invention discloses a preparation method of 7-amide indole compounds, comprising: using [Ru(p-cymene)Cl in HFIP solvent 2 ] 2 and AgSbF 6 As a catalyst, pivalic acid as an additive, with indole compounds and oxazolone compounds as substrates, 7-amide indole compounds were synthesized at room temperature. The reaction raw material of the invention is cheap and easy to obtain, the preparation method is simple, and ruthenium is used as a catalyst, the reaction cost is low, the yield is high, the operation is simple, and it is suitable for the synthesis of different types of 7-amide indole compounds. The method of the invention can be used to synthesize a series of 7-amidoindole compounds, and the synthesized products can not only be used as intermediate compounds, but also be used to further construct complex active compounds; meanwhile, the compounds have great potential for drug activity.

The invention relates to a preparation method of a single crystal high Al component AlxGa1-xN ternary alloy nanorod. The method includes: firstly preparing a silicon substrate with deposited thin layer aluminum powder having a deposition thickness of 0.5-1.0mm, then spreading metal Al powder flatly at one end of a reaction boat, placing the silicon substrate above the powder, dripping Ga liquid tothe other end of the reaction boat, putting a reaction device into a quartz test tube with one opening end, performing sealing and vacuum pumping; when the vacuum degree is less than or equal to 5Pa,introducing argon to fill the whole atmosphere with argon, then adjusting the argon flow rate, conducting heating to 900-1000DEG C, adjusting the argon flow rate to 40-60sccm, at the same time, introducing ammonia with the same flow rate to argon, keeping the state for 1-3h, and conducting furnace cooling, thus obtaining the high Al component single crystal AlxGa1-xN ternary alloy nanorod, wherein the adjustable range x of the Al component is less than or equal to 0.92 and greater than or equal to 0.88. The method has the advantages of simple process, good reproducibility, no phase separation, low production cost, no adding of any catalyst and template, and is easy for industrial popularization and application.

The invention discloses crystallized mesoporous magnesium silicate (3MgO.4SiO2.2H2O) powder and a preparation method thereof. The crystallized mesoporous magnesium silicate (3MgO.4SiO2.2H2O) powder is of a two-dimensional hexagonal mesoporous structure, and a mesopore wall is composed of crystalline-state magnesium silicate. The preparation method of the crystallized mesoporous magnesium silicate powder comprises the following steps: by taking C-filled mesoporous silica SBA-15(C@SBA-15) as an auxiliary template and silicon source, MgCl2.6H2O as a magnesium source, and NH4Cl, NH3.H2O and deionzed water as reaction mediums, carrying out hydrothermal reaction at a certain temperature for a certain period of time, so that mesoporous magnesium silicate is obtained, wherein in a hydrothermal reaction process, SiO2 in C@SBA-15 is taken as reactant to participate in reaction, C in C@SBA-15 can be used for supporting the mesopore wall, magnesium silicate generated by reaction coats the surface of C to form a shell layer, and the magnesium silicate shell layer is taken as the mesopore wall; carrying out high-temperature calcining on the hydrothermal reaction product for removing C to form a mesoporous passage so as to finally obtain the crystallized mesoporous magnesium silicate powder. The prepared mesoporous magnesium silicate powder has high degree of order, large aperture and specific surface area, high crystallinity and good stability.

The invention discloses a high-Al component AlxGa(1-x)N ternary alloy microcrystal sphere and a preparation method thereof and belongs to the technical field of semiconductor alloy material preparation. The microcrystal sphere is an AlxGa(1-x)N ternary alloy crystal of different wurtzite structures of an A1 component, the adjustable range x of the Al component is greater than or equal to 0.77 andless than 1, and the average diameter of the microcrystal sphere is 5.0 [mu]m. The preparation method of the microcrystal sphere comprises the following steps: by taking metal aluminum powder, metal gallium and an ammonia gas as reaction raw materials, vacuuming, introducing argon with the flow of 300-700 sccm, 10-15 minutes later, adjusting the flow of the argon to 40-60sccm, at the same time introducing an ammonia gas of the flow identical to that of the argon, heating to reaction temperature of 950-1000 DEG C within 1-3 hours, and performing vapor deposition method growth, thereby obtainingthe high-Al component AlxGa(1-x)N ternary alloy microcrystal sphere. The method is simple in process, good in repeatability, free of phase separation, low in production cost, free of catalyst or template and easy in industrial popularization and application.

The invention discloses a preparation method of 3-selenocoumarin compounds, comprising: using PIFA as an oxidant in a DCM solvent, using coumarin compounds and selenoether compounds as substrates, and synthesizing at room temperature 3‑Selenocoumarins. The invention has cheap and easy-to-obtain reaction raw materials, simple preparation method, uses PIFA as an oxidant, has low reaction cost, short reaction time, high yield and simple operation, and is suitable for the synthesis of different types of 3-selenocoumarin compounds. The method of the invention can be used to synthesize a series of 3-selenocoumarin compounds, and the synthesized products can not only be used as intermediate compounds, but also be used to further construct complex active compounds; meanwhile, the compounds have great potential for drug activity.

The invention discloses a preparation method of a 4-selenomethoxynaphthalene compound, which comprises the following step: in a DCM solvent, synthesizing the 4-selenomethoxynaphthalene at room temperature by using PIFA as an oxidizing agent and 1-methoxynaphthalene and a diselenide compound as substrates. The reaction raw materials are cheap and easy to obtain, the preparation method is simple, the PIFA serves as the oxidizing agent, the reaction cost is low, the reaction time is short, the yield is high, operation is easy, and the method is suitable for synthesis of different types of 4-selenomethoxynaphthalene compounds. The method disclosed by the invention can be used for synthesizing a series of 4-selenomethoxynaphthalene, and the synthesized product not only can be used as an intermediate compound, but also can be used for further constructing a complex active compound; and meanwhile, the compound has great pharmaceutical activity potential.