87results about How to "Reaction conditions are easy to achieve" patented technology

The invention relates to a catalyst for decomposing hydrogen sulfide by photocatalysis and a preparation method of hydrogen and liquid sulfur by employing same. The catalyst comprises a carrier, active component and assistant and has the characteristics that the carrier is one or more selected from vanadate, niobate and tantalate, the active component is one or more selected from alkali metal hydroxide, alkaline earth metal hydroxide, alkali metal nonmetal oxysalt, alkali metal nonoxysalt, alkaline earth metal nonmetal oxysalt and alkaline earth metal nonoxysalt and the assistant is lanthanide oxide or VIII group oxide. The catalyst of the invention can be used for preparing hydrogen and liquid sulfur so that the produced sulfur is easy to be separated from the catalyst, the catalyst can be recycled and the sulfur contained in hydrogen sulfide can be fully recycled, thus realizing the comprehensive utilization of hydrogen sulfide.

The invention discloses super-hydrophobic wood. The surface of the super-hydrophobic wood is covered with a composite film layer which is formed by settling silane coupling agents which are wrapped by nano particles after hydrolysis and polycondensation. Chemical bonding is generated between the composite film layer and the wood through the hydroxyl action, and the composite film layer contains uniform micron-size grooves and nano-size protrusions and is assembled with low-surface-energy materials. The water drop contact angle of the super-hydrophobic wood reaches 150-156 degrees, and the rolling angle is smaller than 4 degrees. The nano particles are one or more kinds of nano SiO2, nano TiO2, nano Al2O3, nano ZnO and nano Fe3O4. According to a preparation method, alkali treatment is carried out on the wood firstly, and then reaction liquid containing hydrophobic materials deposits on the surface of the wood subjected to alkali treatment through a gas-phase deposition reaction, so that the super-hydrophobic wood is obtained. The super-hydrophobic wood is high in hydrolytic resistance. The steps of the preparation method are simple, the reaction conditions are easy to realize, and the preparation period is short.

The invention discloses a method for asymmetrically synthesizing a derivative of (S)-2-clorine-1-phenyl ethanol. In the method, the bakery yeast is used for biologically catalyzing a derivative of 2-clorine-1-acetophenone shown in a formula (II) to asymmetrically synthesize the derivative of (S)-2-clorine-1-phenyl ethanol shown in a formula (I), wherein R1 and R2 are any two of H, F, Cl, Br, CH3 or C2H5. In the method, the bakery yeast is used as a catalyst to biologically asymmetrically catalyze the derivative of (S)-2-clorine-1-phenyl ethanol with single optical rotation property, the yield of the target product of the derivative of (S)-2-clorine-1-phenyl ethanol is over 74 percent, the enantioselectivity e.e is over 97 percent, thereby the method greatly simplifies the following split separation step; moreover, the method also has the advantages of simple step, high reaction stereoselectivity, mild reaction conditions, low cost and suitability for mass production.

The invention discloses a preparation method of a boron-nitrogen dual-ingredient self-doping three-dimensional drape graphene electrode material. The method comprises the following operation steps: (1) an amino boron hydride compound and catalyst metal salt are mixed, and are dissolved in a solvent; heating and stirring are performed until dry powder is obtained; (2) heat treatment is performed in inert gas; then, the powder is cooled to room temperature; (3) an acid solution is added; heating, stirring and filtering are performed; filter residue is cleaned to a neutral state; drying is performed to obtain boron-nitrogen dual-ingredient self-doping three-dimensional drape graphene. The preparation method has the advantages that the steps are fewer; reaction equipment is simple; the reaction conditions are easily realized; the graphene doping amount and type can be easily controlled; the cost is low; the large-scale preparation is easy; the prepared boron-nitrogen dual-ingredient self-doping three-dimensional drape graphene has high activity and good stability, and shows good electrochemical performance in lithium ion battery negative electrodes and fuel oxygen reduction catalysts; huge economic benefits and values are realized.

The invention relates to a fluorescent poly arylene ether nitrile multipolymer and a preparation method thereof, which belong to the technical field of high polymer materials. The preparation method comprises the following steps: using 2, 6- dichlorobenzonitrile, phenolphthalein and phenolphthalein as raw materials and N-pyrrolidone as solvents for carrying out dehydration reaction for 2 to 5 hours at 140 to 160 DEG C under the effect of catalysts and dehydration agents, raising the temperature to 180 to 200 DEG C for reaction after the dehydration agents are evaporated out, stopping the reaction when a pole climbing phenomenon occurs, crushing precipitates obtained through primary precipitation of reagents via precipitating agents, acidifying the precipitates by dilute hydrochloric acid, washing the precipitates by boiling water, filtering and drying the precipitates to obtain crude products, dissolving the crude products by dimethylformamide, filtering the solution, and obtaining the fluorescent poly arylene ether nitrile multipolymers after filtering and drying the precipitates after the secondary precipitation of filter liquid via the precipitating agents. The invention has the advantages that raw materials can be easily obtained, the reaction condition can be easily realized, the production process is easy to control, no secondary reaction and no byproduct are generated in the polymerization process, and the prepared fluorescent poly arylene ether nitrile multipolymer has good fluorescence performance, thermal stability, mechanical property and self fire resistance and belongs to a novel high-heat-resistance fluorescent polymer.

The present invention provides 4-AA preparing process with (2S,3S)-2-benzoylaminomethyl-3- hydroxy butanoic ester, which is prepared with 2- benzoylaminomethyl-3-carbonyl butanoic ester, as material. The 4-AA preparing process has low cost, high yield, reaction condition suitable for industrial production and other advantages.

The invention belongs to the field of building material, and especially relates to a binder, and a preparation method thereof. The binder is mainly prepared from a magnesium chloride solution, magnesium oxide, a modifying agent, and wood chip at a mass ratio of 1:0.8-1.2:1-2.5:1.5-4.5. The modifying agent is mainly prepared from an acid solution, polyethylene glycol, formaldehyde, and o-dihydroxybenzene. The binder is high in strength, adhesive properties, anti-permeability, and crack resistance, and no efflorescence is caused.

The invention provides a preparation method for 2,9-dibutyl sebacate. The preparation method comprises the following steps: dissolving butyldimethyl malonate in a solvent, then adding chopped sodium particles in batches, continuing stirring and carrying out a reaction under a heating condition after completion of addition, and then adding a dibromination reagent drop by drop so as to obtain 2,9-dibutyltetramethyl tetracaprate; adding strong aqueous alkali into 2,9-dibutyltetramethyl tetracaprate and carrying out a reflux reaction in a solvent so as to obtain 2,9-dibutyl tetracapric acid; and adding a high boiling solvent into 2,9-dibutyl tetracapric acid and carrying out a reflux reaction in a solvent for a certain period of time so as to obtain 2,9-dibutyl sebacate. The preparation method provided by the invention has the advantages of low cost, simple operation, easy realization of reaction conditions, high reaction yield, good product color and convenience in industrialization production.

The invention discloses a method for synthesizing (R)-beta-hydroxytetradecanoate, which comprises the following steps of: (1) in the presence of an improved chiral catalyst (R)-BINAP-RuBr2, dissolving a compound of formula (III) in a solvent and performing catalytic hydrogenation; and (2) after the reaction ends, replacing nitrogen with hydrogen, and performing hydrogenation under a pressure of 0.1-0.2kg/cm<2>; and performing reduced-pressure concentration on the reaction solution, and recrystallizing to obtain white solid crystals which are (R)-beta-hydroxymethyltetradecanoate. According to the method, the improved chiral catalyst (R)-BINAP-RuBr2 is innovatively used for catalytic synthesis of (R)-beta-hydroxytetradecanoate compounds; and by use of the catalyst, the compound shown as the formula (III) can be converted into a high-stereoselectivity (greater than 98.5%ee) compound shown as the formula (I) under a relatively low pressure (0.01-6kg/cm<2>), and the use of high-pressure hydrogenation equipment and acid-resistant equipment is avoided. The method disclosed by the invention has the advantages of low cost, high yield, easy implementation of reaction conditions, adaptability to large-scale industrial production of compounds shown as the formula (I), and the like.

The invention relates to a method for preparing a polypropylene composite. The method is characterized in that the polypropylene composite is prepared from polypropylene, a compatibilizer, glass fibers, a nucleating agent and an anti-oxidant according to a two-step process. The method comprises the following steps: the nucleating agent is utilized to induce crystal transfer of polypropylene; the glass fibers are compounded with polypropylene subjected to crystal transfer for further enhancement. Therefore, the problem that according to a traditional method in which polypropylene is directly mixed with a nucleating agent and fibers, the polypropylene crystallization behavior regulation and control functions of the nucleating agent cannot be effectively played due to introduction of the glass fibers serving as external impurities is solved. According to the method provided by the invention, regulation and control of the nucleating agent and enhancement of the glass fibers are effectively combined together to improve the combination property of the polypropylene composite, so that the polypropylene composite prepared by the method is not only excellent in comprehensive mechanical property but also high in thermal stability. Meanwhile, the raw materials (the glass fibers) are low in price and easily accessible, and a twin-screw extrusion process is simple and low in cost, so that large-scale production and application can be conveniently realized.

The invention discloses a preparation method of a dye functional magnetic nano material and application in fluorescent sensing and magnetic separation of TNT. The preparation method comprises the following steps of firstly, reacting a ferric oleate complex with oleylamine in oleic acid so as to obtain an oleic acid coated ferroferric oxide nano material; then dispersing the oleic acid coated ferroferric oxide nano material into a diethyl ether solution of 2-ethylamine phosphate to complete ligand exchange so as to obtain a 2-ethylamine phosphate coated ferroferric oxide nano material; and finally reacting with fluorescein isocyanate so as to obtain a target product. The dye functional magnetic nano material can be used for sensing and removing the trace TNT in a polluted water sample, and has the reproducibility.

The invention provides a full-novel synthesizing route for preparing triamcinolone acetonide acetate. According to the full-novel synthetic route, utilized raw materials have lower cost and more easiness in obtaining. The synthetic route comprises the steps of hydroxylating reaction raw materials and protecting, then selectively oxidizing five-membered ring double bonds, removing a protecting group, then protecting oxidized di-hydroxyl, then epoxidizing six-membered ring double bonds, performing open-ring fluorination and esterfying hydroxyl to obtain a triamcinolone acetonide product. A reaction process has easiness in operation, yields of all the steps are higher, obtained products have higher purities, byproduct generation is effectively avoided, production cost is reduced, and industrial production is facilitated.

The invention relates to the technical field of organic synthesis, in particular to an intermediate for synthesizing 2-chloroadenosine, a synthesis process of the intermediate and a synthesis processof the 2-chloroadenosine. The synthesis process of the intermediate for synthesizing the 2-chloroadenosine comprises the following step: carrying out condensation reaction on 2,6-dichloropurine and tetraacetylribose under the catalytic action of 4-dimethylaminopyridine to form 2,3,5-4-triacetyl-2,6-dichloropurine riboside. The synthesis process is simple to operate, low in catalyst dosage, low incost, low in pollution and easy to industrially implement, and the yield and purity of the synthesized 2-chloroadenosine are higher.

The invention relates to a method for preparing dimethyl n-butyl malonate, which comprises the following steps: weighing dimethyl malonate, an alkylation reagent, an inorganic alkali and a solvent, adding the dimethyl malonate and alkylation reagent into a reactor, adding the inorganic alkali and solvent, continuing stirring to react under heating reflux, supplementing chlorinated n-butane, adding a phase-transfer catalyst, continuing the reflux reaction, and collecting the product distilled at 110 DEG C under the pressure of 8 mmHg, thereby obtaining the dimethyl n-butyl malonate. The chlorinated n-butane is added in multiple steps to enhance the conversion rate of the dimethyl malonate; and after the chlorinated n-butane is recovered, fractionation is performed to obtain the product dimethyl n-butyl malonate. The method is economic and environment-friendly, has the advantages of low cost, no generation of disubstituted impurities and accessible reaction conditions, and is simple to operate and convenient for industrial production.

The invention discloses a dewing-frosting preventing self-cleaning coating and a preparation method thereof. The preparation method comprises the steps that (1) a silicon source is added into ethyl alcohol and stirred to be dissolved, hexamethyl disilylamine and deionized water are added, aging is conducted at the indoor temperature after continuous stirring, and silica sol is obtained; (2) nano silicon dioxide is added into the silica sol and is stirred and subjected to ultrasonic oscillation to obtain a solution, then, the solution is added into ethyl alcohol, and after ultrasonic oscillation, a coating raw material solution is obtained; (3) a base material is etched so that the base material can have a microscopic coarse structure, and the etched base material is cleaned and dried; and(4) the dried base material is soaked into the coating raw material solution for still standing, then, the dried base material is taken out and subjected to airing, and a hydrophobic dewing-frosting preventing self-cleaning coating is obtained. The coating is simple in preparation technology, low in manufacturing cost, long in service life, and capable of being applied to dewing and frosting preventing of an air conditioning system, a building glass curtain wall and aircraft wings, and has the wide application prospects in the fields of buildings, energy resources and aviation.

The invention belongs to the technical field of organic synthesis and aims at providing a method for preparing 2-hydroxyl 3,6-dichlorobenzoic acid. The method comprises the following two steps: by using marketed 2,5-dichlorophenol and trichloromethane as raw materials, inorganic bases such as sodium hydroxide, potassium hydroxide, calcium hydroxide, potassium carbonate and the like as bases and water or alcohol or an alcohol and water mixed solvent as a solvent, carrying out Reimer-Tiemann reaction to obtain 2-hydroxyl 3,6-dichlorobenzaldehyde; by using potassium permanganate as an oxidizing agent, oxidizing the obtained 2-hydroxyl 3,6-dichlorobenzaldehyde to obtain 2-hydroxyl 3,6-dichlorobenzoic acid in the presence of a phase transfer catalyst. The method is few in reaction steps (just two steps), a high pressure reaction kettle is not required for reaction, the reaction condition is easy to achieve, and the method is simple to operate and low in cost.

The invention provides a preparation method of Dasatinib. 2-Bromothiazole-5-formic acid and 2-methyl-4-amino-6-cloro pyridine are adopted as raw materials, a first-time substitution reaction is performed, the raw materials and 4-(2-acetyl oxyl) Ethylpiperazine are subjected to a second-time substitution reaction to prepare 2-[[6-[4-(2-acetyloxy ethyl)-1-piperazinyl]-2-methl-4-pyrimidyl]amino]-5-Febuxostat; then, the product and an acylating chlorination reagent are subjected to an acylating chlorination reaction and subjected to an amidation reaction with 2-cholo-6-methylaniline, and finally ahydrolysis reaction is performed to remove acetyl to prepare dasatinib. The raw materials are cheap and easy to obtain and low in cost; the technological process is simple, operation is safe and easy, technological wastewater generation amount is small, and the method is environmentally friendly; raw materials and intermediate products stability is suitable, the reaction activity and selectivityare high, reaction conditions are easy to obtain, side reactions are few, the manufactured dasatinib contains few impurities, the purity and yield are high, and industrial production of dasatinib is facilitated.

The invention discloses an isocyanate modified urea-formaldehyde resin adhesive, and further provides a preparation method of the isocyanate modified urea-formaldehyde resin adhesive. The isocyanate modified urea-formaldehyde resin adhesive is prepared from the following raw materials in percentage by mass: 5%-30% of isocyanate, 1%-8% of a solvent, 65%-95% of urea-formaldehyde resin and 2%-10% ofa blocking agent. The preparation method comprises the steps that the blocking agent is uniformly mixed with the urea-formaldehyde resin to obtain a urea-formaldehyde resin solution, the isocyanate isuniformly mixed with the solvent to obtain an isocyanate solution, the isocyanate solution is added to the urea-formaldehyde resin solution and mixed uniformly, and the adhesive is obtained. The isocyanate modified urea-formaldehyde resin adhesive has a long storage time and uniform dispersion, and the preparation method is simple in operation.

The invention provides a preparation method of a FeOOH/PVDF (Polyvinylidene Fluoride) fiber scaffold. The preparation method of the FeOOH/PVDF fiber scaffold comprises the following steps of dissolving PVDF powder in a mixed solvent of acetone and N, N-dimethylformamide to prepare a PVDF solution, then carrying out electrostatic spinning to obtain a fiber membrane, and then drying to obtain a PVDF fiber membrane; and transferring a mixed solution of ferric chloride hexahydrate and sodium nitrate and the PVDF fiber membrane into a reaction kettle for hydrothermal reaction, and washing and drying a product to obtain the FeOOH/PVDF fiber scaffold. The FeOOH in the FeOOH/PVDF fiber scaffold obtained by the preparation method is rod-shaped, the length is about 800 to 900 nm, the width is about 100 nm, and the crystal form is beta form; and the FeOOH is loaded on the surface of the PVDF fiber. The FeOOH/PVDF fiber scaffold can be used as a medical material for inducing mesenchymal stem cells to differentiate into nerve cells. According to the FeOOH/PVDF fiber scaffold as well as the preparation method and the application thereof provided by the invention, the FeOOH/PVDF fiber membrane is designed and prepared by utilizing an electrostatic spinning technology and a hydrothermal reaction process, the preparation method is simple, and reaction conditions are easy to realize; and the obtained scaffold is uniform in surface appearance, has good piezoelectricity, and can induce rBMSCs neural differentiation in a wireless stimulation mode.