253results about How to "Lower reaction conditions" patented technology

The invention discloses an egg- shell metallic catalyst and the method for preparation and the application. The catalyst is an egg- shell supported metallic catalyst with a carrier of hollow silica dioxide, which is a hollow material of certain wall and bore diameter, and comprises a noble metal of 0.1%- 5.0% and / or a transient metal of 5.0%- 40.0%, a non- noble metallic catalyst promoter of 0- 0.5% and a hollow silica dioxide carrier of 60.0%- 99.0%, with the weight ratio of catalyst as a datum level. The egg- shell metallic catalyst can prepare with immersion method or in- situ supporting method. The catalyst has good metal dispersibility, and the metal particle diameter is minor, dispersing on the external surface, inner surface and in the pore passage. And the egg- shell metallic catalyst can catalyze CO and CO2 to prepare lower carbon number hydrocarbons and alcohol, and it also can catalyze olefin and alkyne selectively.

The invention discloses a POSS (polyhedral oligomeric silsesquioxane) contained polyacrylate-polysiloxane block copolymer and a preparation method thereof. The preparation method includes subjecting hydrogen-terminated polysiloxane and vinylcarbinol to reaction to obtain hydroxy-terminated polysiloxane; subjecting the hydroxy-terminated polysiloxane and carboxyl thiocarbonic acid ester to reaction to obtain polysiloxane macromolecular RAFT (reversible addition-fragmentation chain transfer polymerization) reagent; polymerizing the polysiloxane macromolecular RAFT reagent, acrylate monomer and POSS monomer with initiator to prepare the POSS contained polyacrylate-polysiloxane block copolymer. The method has the advantages of simple operation and mild reaction conditions, reaction products have better surface performance and bonding performance with substrates, and further, the reaction products can be used in low-surface-energy lyophobic coating materials and used for preparing ice and snow preventive and antifouling coatings.

The invention discloses a system and method to produce furfural with agricultural wastes, which is characterized by the following: choosing two-step method; comprising hydrolysis system and dehydration distilling system; setting the hydrolysis system as N grade hydrolysis autoclave with end-to-end; proceeding continuous hydrolysis for the agricultural wastes; generating pentose solution; setting the dehydration distilling system as dehydration distilling unit and dehydration reclaiming unit; dewatering and distilling for the pentose solution with the dehydration distilling unit; getting furfural steam; setting the dehydration reclaiming unit as at least one grade dewatering reactor; further-dewatering; generating furfural steam; sending into dehydration distilling tower; distilling continuously; sending the waste water from the dehydration reclaiming unit back to dehydration system; realizing zero discharge for waste water. This invention possesses high productivity, low energy consumption and warm reacting condition, which can be used as raw material to produce alcohol.

The invention discloses an anti-corrosion super-hydrophobic heat reflecting paint and a preparation method thereof. The anti-corrosion super-hydrophobic heat reflecting paint is prepared from the following raw materials: modified nano TiO2, modified nano SiO2, micron TiO2 and / or SiO2, fluorocarbon resin, a solvent, a curing agent, a defoaming agent, a wetting dispersant and a flatting agent. After experiments, the heat reflecting rate of the obtained product reaches 90 percent or more, the water contact angle reaches 145 degrees or more, and the product can meet the requirements on a coating under outdoor severe environments.

The invention provides a method for preparing benzaldehyde by catalyzing and oxidizing styrene. The method comprises the following steps that: raw materials of the styrene, oxidant, solvent and catalyzer are respectively added into a reaction vessel; the reaction vessel is heated to a temperature of between 40 and 120 DEG C and the raw materials react at a constant temperature for 1 to 15 hours; after the reaction is finished, the raw materials are cooled and separated to produce a benzaldehyde finished product, wherein, the catalyzer is an SBA-15 molecular sieve containing one or a plurality of hetero atoms; and the molar ratio between a silicon atom and a hetero atom in the catalyzer is between 5 and 200; the oxidant is a peroxide aqueous solution and a peroxyacetic acid aqueous solution; and the solvent is a monohydric alcohol, ketone and nitrile class. As the method provided by the invention adopts the SBA-15 molecular sieve containing one or the plurality of the hetero atoms as the catalyzer, the method can acquire higher styrene conversion rate and benzaldehyde selectivity; and the catalyzer has simple preparation, low cost and high stability and can be repeatedly used for a plurality of times.

The invention relates to a preparation method for silicon dioxide aerogel. The method includes the following steps: (1) under the acidic condition that pH is equal to 3 to 5, stirring silicon tetrachloride and water for reaction, then adding ammonia water to regulate pH to 8 to 10, adding water and ethanol, and after hydrolytic polycondensation reaction, forming alcogel; (2) carrying out extraction, and removing water / alcohol mixture contained in the alcogel; taking gel solution, adding anhydrous methanol or ethanol, and replacing the water / alcohol mixture in gel pores with the anhydrous methanol or ethanol; (3) adding trimethyl chlorosilane and alkane to alkylate Si-OH on the surface of the gel skeleton, and after drying under the normal pressure, the SiO2 aerogel is produced. The invention has the following advantages that: (1) since the silicon tetrachloride as byproduct produced in a large amount by the organosilicon industry is used as raw material, the material cost in the process of production is greatly reduced; (2) compared with the conventional supercritical drying, the adopted normal-temperature drying can greatly reduce conditions needed by reaction; and (3) the invention cannot destroy the nanopore structure of the SiO2 aerogel, and can stably increase the reaction speed at the same time.

The invention relates to a method for preparing bisphenol-A epoxy resin partially substituted with lignin in a normal-pressure low-temperature water-bath condition through autocatalysis of lignin from papermaking black liquor.. The method comprises the following steps: removing impurities of the papermaking black liquor through acid out; filtering to obtain a lignin alkaline solution; mixing bisphenol-A, epichlorohydrin and the lignin alkaline solution, and sufficiently reacting in a heating and stirring condition by utilizing the autocatalytic effect of the lignin alkaline solution; filtering the product, and distilling the filtrate under reduced pressure to obtain epoxy resin brown viscous liquid finally. The method has the advantages that discharge of papermaking black liquor is reduced, waste utilization is realized, the nontoxic and harmless lignin is utilized as the raw material, and safety of the epoxy resin is improved; reaction conditions are mild, other catalysts or modifying agents are not added, the operation process, is simple, the effects of energy saving and cost reduction are achieved, and economical and social value are created; therefore the method has very important practical significance.

The invention relates to a method for catalytic wet oxidation of industrial sludge. The method includes the steps of (1), uniformly mixing industrial sludge raw materials with a catalyst, delivering the mixture into a reaction kettle, and feeding oxygen into the reaction kettle so as to subject the industrial sludge to wet oxidation; (2), delivering the industrial sludge subjected to wet oxidation into a cooler to cool, and delivering the cooled industrial sludge into a three-phase separator so as to obtain solid sludge at the bottom of the three-phase separator; (3), subjecting the solid sludge to dehydration treatment. Compared with the prior art, the method for catalytic wet oxidation of the industrial sludge has the advantages that the industrial sludge is reduced remarkably, refractory organics are removed to kill harmful pathogenic bacteria, treated sludge organic content is low to facilitate subsequent treatment, a liquid phase obtained after solid waste separation returns to an industrial wastewater treatment system to supplement a carbon source, and wet oxidation conditions can be lowered remarkably by the catalyst, so that energy consumption is reduced.

The invention relates to a method of enzyme catalyzing olefin expoxidation. In the aqueous solution, the bromine peroxidase is applied for biological catalyst and hydrogen peroxide or oxygen is taken as oxygen source to oxidate the olefin into expoxidation. Take the cyclohexen as example. The hydrogen peroxide is applied as the source. They react under the 20 DEG C. to 70 DEG C. for two to ten hours. The yield of epoxy cyclohexane to the hydrogen peroxide is more than 50 per cent and the selectivity of the epoxy cyclohexane is more than 85 per cent. After the reaction, the water phase is separated from the organic phase automatically, and the enzymes left in the water phase can be recycled. Boasting easy technical process, recycled enzymes and easy yield separation, the method is an environment-friendly green chemical process.

The invention relates to a preparation method of nano-graphite carbon powder. The method comprises the steps of: (1) preparing expansible graphite by a chemical oxidation intercalation process; (2) preparing expanded graphite by a microwave process; (3) pressing the expanded graphite into a expanded graphite sheet, putting it into a microporous filter membrane sieving assembly, conducting pressing and sealing, then placing the assembly at the anode and cathode of an electrolytic bath, taking a chlorate solution as an electrolyte solution, carrying out ultrasonic electrolysis at a temperature below 60DEG C, controlling the electrolytic current at 5-18A / cm<2>, the voltage at 6-20V, the ultrasonic oscillation power at 200-600W, and the frequency at 20-40kHz, inverting the anode and the cathode at an interval of 8-15min, completing electrolysis when the concentration of sol in the electrolytic bath is 2-5%, thus obtaining nano-graphite carbon sol; and (4) adding ammonium sulphate into the nano-graphite carbon sol till the mass concentration of ammonium sulfate reaches 5-8%, stirring them uniformly, then performing freeze drying, thus obtaining the nano-graphite carbon powder. The method has the advantages of mild reaction condition and high speed, thus being suitable for industrialized mass production.

The invention discloses a method for absorbing and separating carbon dioxide, which comprises absorption and desorption of the carbon dioxide at certain temperature and specifically comprises the following steps: mixing alcamines compounds and ethylene glycol compounds to form solution so as to obtain an absorbent; making the absorbent contact the gas to be absorbed in gas-liquid mass transfer equipment to obtain a liquid product; and desorbing and separating the liquid product to obtain the carbon dioxide so as to realize the regeneration of the carbon dioxide. The absorbent adopted by the method can efficiently absorb the carbon dioxide, has little corrosion to the equipment, and can realize the regeneration of the carbon dioxide and the cyclic utilization of the absorbent.

The invention provides a device and a method for preparing oxygen-containing liquid fuel by catalytically converting biological oil. The device comprises a biomass rapid thermal cracking oil preparing system (I), a biological oil oil-water phase separation system (II), an oil phase biological oil chemical chain hydrogen production system (III) and a hydrogen output water supply phase biological oil catalytic hydrogenation system (IV), wherein the biomass rapid thermal cracking oil preparing system is used for preparing the biological oil; the biological oil oil-water phase separation system is used for receiving the biological oil and separating the biological oil into oil-phase biological oil and water-phase biological oil to be respectively output to the oil phase biological oil chemical chain hydrogen production system (III) and the hydrogen output water supply phase biological oil catalytic hydrogenation system (IV). The method comprises the following steps of: carrying out heat cracking on a biomass to prepare oil; carrying out water phase and oil phase separation on the obtained biological oil; carrying out chemical chain method on the oil-phase biological oil to produce hydrogen; and providing a'hydrogen source' to the water-phase biological oil to carry out two-step catalytic hydrogenation in a slurry bed; and directly separating and extracting a hydrogenated product to obtain the oxygen-containing liquid fuel. The device and method disclosed by the invention can be used for realizing full-component'graded conversion' of the biological oil.

The invention discloses a CO2 mineralization method capable of co-producing potassium-enriched solution by a high temperature method, which mainly comprises the following steps of: adequately and evenly mixing smashed potash feldspar-enriched ore power and calcium chloride, and carrying out conversion reaction under the condition that the temperature is not lower than 600 DEG C; putting material which is adequately converted into a reactor, adding water, charging CO2, and carrying out mineralization reaction under the condition that the CO2 partial pressure is 0.3-15MPa, and the temperature is 50-350 DEG C; and charging material liquid which is adequately mineralized into separation equipment to separate the solid from the liquid, wherein the liquid phase is the potassium ion-enriched potassium-enriched solution, and the solid phase is the calcium carbonate-containing mineralized product. The CO2 is mineralized by the technical method disclosed by the invention, and the conversion rate of the potash feldspar component in the ore reaches 96%, so that compared with the highest conversion rate 13% of the existing CO2 mineralization method capable of co-producing the potassium-enriched solution, the conversion rate of the CO2 mineralization method is improved by over 6.3 times.

The invention discloses an improved preparation method for high-purity regorafenib (a compound I), particularly a preparation method for a compound 3 (a regorafenib intermediate) with the structure shown in the description, wherein the compound 3 is further used for industrial preparation of regorafenib with extremely excellent purity. By adopting a phase transfer catalyst, the method is simple and convenient to operate and environmental-friendly, can effectively inhibit generation of impurities, is low in requirement on equipment and is suitable for industrial production of high-purity regorafenib on a large scale.

The invention provides a preparation method of medical biodegradable polymer material polylactate geycollic acid (PLGA). A mass polymerization method is adopted for manufacturing the polylactate geycollic acid (PLGA), the production technology is simple, conditions needed by the reaction are low, the reaction speed is high, and the reaction time is short; a catalytic system adopting an organic metal compound as a main catalyst and adopting a substance containing reactive hydrogen as an initiator is adopted as an efficient catalytic system, the reaction time is shorter compared with a single catalyst, the weight-average molecular weight of the product is adjustable, the lowest molecular weight distribution index can reach 1.40, the catalytic activity is high, and the PLGA is non-toxic basically; the reaction product is precipitated three times, unreacted monomers and low-molecular-weight by-products can be removed, the molecular weight distribution index is lowered, and the product purity is improved.

The invention discloses a preparation technique of the lithium-ion battery anode material lithium iron phosphate, which belongs to the preparation method of the battery anode material. The lithium iron phosphate is prepared by taking iron powder Fe, lithium hydroxide LiOH or lithium carbonate LI2CO3 and phosphoric acid (H3PO4) as raw materials according to the following processing steps of preparation of acid phosphate ferrous, preparation of iron lithium phosphate, and sintering. The preparation technique has the advantages of simple production process, easy operation, safety and reliability, pure product, stable quality, low costs, and no pollution to the environment.

The invention relates to an amphiphilic fluorinated acrylate penta-block copolymer and a preparation method thereof. The technical characteristics are that a name is amphiphilic fluorinated acrylate penta-block copolymer, namely poly-fluorinated acrylate-b-polymethacrylate-b-polyethylene glycol-b-polymethacrylate-b-poly-fluorinated acrylate. A synthetic method uses a bromine-terminated polyethylene glycol as a macro-molecule initiator and uses a one-pan way to gradually charge, that is performs an atom transfer radical polymerization reaction of the macro-molecule initiator with methacrylate, and after the reaction ends, directly adds the fluorinated acrylate to obtain the amphiphilic fluorinated acrylate penta-block copolymer through the atom transfer radical polymerization reaction. The copolymer and the preparation method have advantages of mild reaction condition, simple operation, reduced steps, high product yield, reduced cost, clear product structure and narrow molecular weight distribution, can save time and raw materials, and has potential application in fields of LCD, aerospace coating, photoconductive material, nano-carbon material, pharmaceutical carriers, etc.