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Preparation method of novel hyperbranched triazine char forming agent
The invention discloses a preparation method of a novel hyperbranched triazine char forming agent, which comprises the following steps: adding a dissolved diamine solution at 0-10 DEG C, gradually and dropwisely adding a dispersed cyanuric chloride solution, and reacting for 1-4 hours; heating to 30-70 DEG C, adding an acid-binding agent, and reacting for 3-8 hours; heating to 90-150 DEG C, and reacting for 6-10 hours; and stopping stirring, carrying out vacuum filtration, washing with water, and drying to obtain the triazine hyperbranched char forming agent. Compared with the prior art, the invention has the advantages of continuous reaction process, short reaction time, cheap raw materials, low solvent consumption, no addition of any blocking agent in the reaction process, simplified synthesis technique, high heat stability and high char forming ratio.
Owner:合肥安聚达新材料科技有限公司
Hyperbranched polyphosphazene flame retardant charring agent and preparing method thereof
An efficient hyperbranched polyphosphazene flame retardant charring agent is prepared by reacting hexachlorocyclotriphosphazene with a binary compound containing two active groups. The charring agent has characteristics of good foaming charring performance, excellent flame retardant effects and good processing performance, and can be widely used in plastics, rubber, coating, adhesives, and other polymer materials. A preparing method adopts a one-pot method, and has characteristics of continuous reaction process, short reaction time and high production efficiency. By controlling the mole ratio of the hexachlorocyclotriphosphazene to the binary compound, no end-capping agent is added in the reaction process. When compared with the addition of end-capping agents in synthesis processes in triazine type charring agent patents, the synthetic process of the charring agent is simplified.
Owner:苏州安鸿泰新材料有限公司
Method for preparing functional fluorine-bearing monomer by vertical-tube type catalytic reaction
ActiveCN101712639AHigh purityFast addition reactionGroup 5/15 element organic compoundsSulfonic acid preparationLiquid productVertical tube
The invention discloses a preparation method of a functional fluorine-containing monomer. The method comprises the following steps of: uniformly mixing a perfluoro-linear chain or branched chain acyl fluoride compound, trifluoroethylene sulfuric ester and anhydrous hydrogen fluoride liquid in the mole ratio of 1:1:(1-20); passing from bottom to top through a vertical-tube type reactor which is filled with a catalyst; finishing addition reaction in a short time under the action of the high specific surface area catalyst inside the reactor; and setting apart a reaction liquid product from the upper part of the vertical-tube type reactor to form a product with a general formula in formula (I). In the invention, the functional fluorine-containing monomer can be prepared continuously and efficiently with easily operated reaction equipment, conveniently controlled reaction temperature and no use of any organic solvent, and a high-purity monomer can be obtained through simple rectification. The catalyst filling in the tubular reactor is one or a mixture of active carbon, macro-porousmolecular sieve and porous aluminum oxide. The reaction can be carried out continuously inside the reactor and satisfies industrialization requirements. CF2=CF-O-Rf(I).
Owner:SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
Solar boiler
InactiveCN101126553ATo achieve the purpose of energy savingLow costSolar heating energySolar heat devicesThermal energyFailure rate
The present invention provides a solar boiler and a circulated thermal pipe, and relates to a solar collecting, conversion, heat transfer and heat exchanging device. The solar radiation is reflected and congregated to a heat absorption pipe arranged on a axial line of a reflector of single-curved surface by the reflector of single-curved surface, converted into heat energy after the absorption of sunshine by a coating layer, and the heat energy is delivered to a heat exchanger by a circulated thermal pipe, and the continuous working ranging from dozens of DEG C to 1,700 DEG C is achieved by the adoption of the working fluid of mutual solution. The circulated thermal pipe has automatic adjustment of the flow rate, rapid heat transferring of large power, large falling, long distance and small temperature differences, working of high temperature and low pressure, using of cold regions minus 40 DEG C and safe using. The present invention has lower failure rate by adopting a device intermittently and unified driving the reflector to track the solar device, stable and adjustable heating parameters by phase change thermal storage of paralleled connected small containers, multifunction and combined using of high, middle and low temperature, wide ranges of application, and can be used for the industrial heating of hydrogen production, power generation, refrigeration, freshwater production, pure water production, gas supplying, heat supplying, chemical and oil, etc.
Owner:陈红专
Method for preparing nano pseudo boehmite and microchannel reactor
InactiveCN101450812AThe reaction process is controllableGood mixing effect of raw materialsAlkali-metal aluminates/aluminium-oxide/aluminium-hydroxide preparationHigh fluxNanomaterials
The invention relates to an inorganic nanometer material and a micro-channel reactor, in particular to a method for preparing nanometer pseudoboemite and a micro-channel reactor. Two paths of liquid-phase reaction liquids are conveyed into the micro-channel reactor through an advection pump and finish a precipitation reaction in the micro-channel reactor, and then a high-purity nanometer material is obtained through a series of post treatments. The method adopts a single-channel micro-reactor and a multi-channel micro-reactor. The method has the advantages of controllable process, good mixing effect of raw materials, quick reaction, high-flux operation, continuous reaction process, large operation elasticity, high time space yield, high product purity, controllable particle size dimension, and narrow particle size distribution.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Preparation method of CdZnSeS quantum dots
ActiveCN102676174AEasy to operateThe reaction process is continuousLuminescent compositionsQuantum dotSelenium
The invention relates to a preparation method of CdZnSeS quantum dots. The preparation method comprises the following steps: (1) evenly mixing zinc sources, selenium sources and organic solvent, leading in shielding gas, and heating to 220-290 DEG C; or evenly mixing inorganic zinc compounds, the zinc sources, fatty acid and the organic solvent, leading in the shielding gas, and heating to 220-290 DEG C; (2) slowly adding cadmium sources dropwise, monitoring wavelengths of fluorescence emission peaks of intermediate products in real time, and stopping adding the cadmium sources dropwise when the wavelengths of the fluorescence emission peaks of target products are achieved; (3) slowly adding stoichiometric sulfur sources or mixed liquid of the sulfur sources and the zinc sources dropwise; and (4) reacting for 0.5-24h at 220-290 DEG C to obtain the CdZnSeS quantum dots with different emission wavelengths. The preparation method of the CdZnSeS quantum dots is simple to operate, the reaction process is continuous and stable, a rapid injection method is not required, the requirements for production equipment are lowered, and the reaction temperature is low. Fluorescence emission spectrums of the products can be controlled by adjusting addition amount of the cadmium sources according to real-time monitoring results.
Owner:GUANGDONG POLY OPTOELECTRONICS
7beta-hydroxysterol dehydrogenase mutant and application of 7beta-hydroxysterol dehydrogenase mutant in ursodeoxycholic acid synthesis
ActiveCN107099516AEasy to separate and extractOvercoming the problem of inactivation processingOxidoreductasesGenetic engineeringChenodeoxycholic acidSubstrate concentration
The invention discloses a 7beta-hydroxysterol dehydrogenase mutant with increased activity and stability which is obtained through molecular evolution, recombinant expression plasmid containing the 7beta-hydroxysterol dehydrogenase mutant gene and a recombinant expression transformant and a preparation method of a recombinant mutant enzyme preparation, and the invention also provides an application of the recombinant mutant enzyme preparation in ursodeoxycholic acid synthesis. The 7beta-hydroxysterol dehydrogenase has excellent activity and heat stability, can efficiently catalyze asymmetric reduction of 7-carbonyl lithocholic acid to prepare the ursodeoxycholic acid; the 7beta-hydroxysterol dehydrogenase is subjected to immobilization and then is subjected to couple by an enzyme method with the immobilized 7beta-hydroxysterol dehydrogenase, epimerization of a substrate chenodeoxycholic acid with low cost can be directly catalyzed, ursodeoxycholic acid can be prepared through continuous conversion, and the operation is simple. Compared with the prior art reported currently, ursodeoxycholic acid prepared by hydroxysterol dehydrogenase through catalysis has the advantages of high substrate concentration, short reaction time, complete reaction, and high product purity, and has strong industrial application prospect.
Owner:EAST CHINA UNIV OF SCI & TECH +1
Technique of alkaline process for producing sodium methoxide/sodium ethylate
InactiveCN1626488AQuick responseContinuous responsePreparation of metal alcoholatesSodium methoxideMolecular sieve
A process for preparing sodium methoxde (or ethoxide) by alkali method includes reaction between excess methanol (or ethanol) and sodium hydroxide to obtain product, dewatering the vapour of methanol (or ethanol) by parallel two molecular sieves for alternative adsorption and desorption, and rectifying the solution of methanol (or ethanol) for reuse. Its advantage is no pollution.
Owner:于志波
One-step synthesis process of producing biodegradable high-hydroscopicity resin directly with corn powder
The present invention belongs to chemical synthesis process of polymer and relates to the production of synthetic resin. By combining artificial polymerization and polymer grafting into one step, the present invention produces high-hydroscopicity resin with corn powder in one step. Turf is added into the material to improve performance and exothermic reaction for heat crosslinking is adopted for easy temperature control. The technological process is simple and produces no side product and waste, and the product has hydroscopicity of 800-1000 times and is biodegradable. The product may be used as water saving material in solving crop water deficiency problem.
Owner:NORTHEAST NORMAL UNIVERSITY
Ternary composite photocatalytic nanometer reactor as well as preparation method and application thereof
InactiveCN106582495AImprove stabilityImprove photocatalytic activityPhysical/chemical process catalystsWater/sewage treatment by irradiationFe3o4 nanoparticlesChemistry
Owner:JIANGSU UNIV
Method and apparatus for preparing solid natural gas
InactiveCN1621502AReduce energy consumptionLow equipment investmentGaseous fuelsSolid fuelsForming gasHigh pressure water
The present invention is solid natural gas preparing process and apparatus with easy implementation, low cost and high efficiency. The technological scheme includes spraying high pressure natural gas via nozzles into low temperature and high pressure water flow in the bottom of the reactor to form fine bubbles and react with water; setting cold trap pipe inside the reactor to remove the creating heat of hydrate and create pressure, temperature and heat transferring conditions for creating hydrate inside the cold trap pipe; forming gas cap in the top of the tower with the un-reacted gas to maintain sufficient pressure; forming flowing slurry with the hydrate and excessive water and making the slurry enter the flash evaporator for gas-liquid separation; filtering the automatically concentrated slurry in a filtering machine to obtain 'dry' hydrate product; and circulating with low temperature water for continuous and efficient reaction.
Owner:SOUTHWEST PETROLEUM UNIV
Method for preparing aniline from nitrobenzene
InactiveCN101434547AReduce consumptionAvoid generatingOrganic compound preparationAmino compound preparationNickel catalystContinuous use
The invention discloses a method for preparing aniline by using nitrobenzene, which comprises the steps as follows: nitrobenzene, ethanol and a supported catalyst are respectively added into a kettle firstly, wherein, the mass of the ethanol added is 10 percent to 30 percent of that of the nitrobenzene added and the mass of the supported nickel catalyst is 3 percent to 6 percent of that of the nitrobenzene added; hydrogenation reaction is carried out at the temperature of 60 DEG C to 90 DEG C for 3 hours to 8 hours and the pressure for the hydrogenation reaction is 1.5 MPa to 3.0 MPa; solid-liquid separation is carried out after the completion of the reaction; product separation is carried out to a supernatant solution separated; and a solid catalyst separated is input into the reaction system for continuous use again.
Owner:甘肃中科药源生物工程股份有限公司
Method for reducing oilseed acid value
The invention provides a method for reducing the acid value of oil materials, which comprises: reacting the oil materials of which the acid value is to be reduced and C1-C6 monobasic alcohol in a reactor, and collecting oil materials of which the acid value is reduced, wherein the temperature in the reactor is between 100 and 330 DEG C, and the pressure in the reactor is between 0.1 and less than 5 MPa. The method not only can effectively reduce the acid value of the oil materials but also can make the reaction continuously performed, does not generate waste acid, basically does not generate wastewater, and is favorable for environmental protection and subsequent processing.
Owner:CHINA PETROLEUM & CHEM CORP +1
Method for preparing 1-naphthylamine from 1-nitronaphthalene
InactiveCN101434550AReduce consumptionAvoid generatingOrganic compound preparationAmino compound preparationContinuous useHydrogenation reaction
The invention discloses a method for preparing 1-naphthylamine by using 1-nitro-naphthalene. The method is that the 1-nitrobenzene is added into a kettle firstly and then ethanol and a supported catalyst are added; the kettle is closed and air in the kettle is displaced by using hydrogen; then normal pressure is maintained in the kettle and heating and mixing are carried out; the hydrogen is introduced into the kettle after temperature in the kettle reaches 60 DEG C so as to lead the pressure in the kettle to be maintained at 1.0 MPa to 3.0 MPa and then hydrogenation reaction is started; a conversion ratio can reach 95 percent to 99 percent after the hydrogenation for about 3 hours to 8 hours and then a reacted mixture and the catalyst are separated out; the catalyst separated is returned to the kettle for continuous use to supplement the lost catalyst; reaction product separation is carried out to the reacted mixture which is a clear solution so as to obtain the 1-naphthylamine.
Owner:甘肃中科药源生物工程股份有限公司
A kind of production method of vanillin
InactiveCN102276434ANo emissionsNo pollution in the processChemical recyclingCarbonyl compound separation/purificationDistillationHazardous substance
The invention proposes a production method of vanillin. Production of vanillin from wood phenol, after condensation of raw materials, acidification of condensation liquid, extraction of wood phenol, oxidation of condensation liquid, decarboxylation of oxidation liquid, extraction of vanillin, distillation of vanillin, crystallization of vanillin, catalyst regeneration and vanillin The product drying and packaging process is completed. The invention uses wood phenol as raw material to produce vanillin, which has the advantages of continuous reaction process, recycling of auxiliary materials, no discharge of harmful substances, no pollution to the environment, high yield of vanillin product and less impurities . It is suitable for application in the production of vanillin fragrance.
Owner:LIAONING SHIXING PHARMA & CHEM
Biological feedback type delivery physical analgesia device
ActiveCN102940934BAccurate responseContinuous responseElectrotherapyDiagnostic recording/measuringWorkstationElectrical stimulations
Owner:GUANGZHOU SUNRAY MEDICAL APP
Macromolecule triazine charring agent and preparation method thereof
ActiveCN102702522AHigh char formation rateThe synthesis process is continuousOrganic-compounds/hydrides/coordination-complexes catalystsOrganic solventHydrogen
The invention relates to a macromolecule trazine charring agent and a preparation method thereof. According to the invention, a group with the catalytic action is introduced into a triazine macromolecule polymer with the main chains containing the fatty group structures, and is integrated with the charring agent, so as to generate the catalytic action nearby; or, the group with the catalytic action can also be fixed on molecular chains of the polymer, so as to prevent migration and uneven dispersion and greatly improve catalytic efficiency. The specific preparation method is as follows: firstly, a binary substance and an acid-binding agent are mixed, and then are stirred for 0.5 to 1 hour, so as to obtain a compound with bifunctional reactive hydrogen; the compound is added into a cyanuric chloride aprotic organic solvent to react for 4 to 8 hours, and then is added into an aprotic organic solvent containing sulfonic acid group activated monomers to react for 8 to 12 hours by adding the catalytic agent and the acid-binding agent; and finally, the product is obtained through filtering, washing and drying. The method provided by the invention has continuous reaction process, short reaction time and high reaction efficiency.
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
Sieve plate-free fluidized bed as well as preparation method of boron trichloride
ActiveCN103506056AReduce energy consumptionSolve the problem of easy clogging of sieve plate holesBoron halidesChemical/physical processesBorideAlkaline earth metal
Disclosed are a fluidized bed without a sieve plate and a method for preparing boron trichloride using same. The method comprises: filling the bed body (1) of a fluidized bed without a sieve plate with a powder raw material, i.e. an alkaline earth metal boride, via a raw material supplying device (4); opening a carrier gas source (2), feeding the carrier gas into the bed body (1) of the fluidized bed without a sieve plate, so that the powder raw material i.e. the alkaline earth metal boride is in a fluidized state in the bed body (1) of the fluidized bed without a sieve plate; opening a heating device (5) to heat the bed body (1), feeding a reaction gas i.e. anhydrous hydrogen chloride when the temperature reaches the specified temperature; and after the reaction reaches the specified time, opening and starting a separating device (7), so as to obtain the necessary boron trichloride.
Owner:昆明先导新材料科技有限责任公司
Method for preparing chlorine trifluoride
PendingCN112723313AFully contactedIncrease contact timeInter-halogen compoundsChemical industryPtru catalyst
The invention belongs to the technical field of inorganic fluorine chemical industry, and particularly relates to a method for preparing chlorine trifluoride, which comprises the following steps: respectively preheating fluorine gas and chlorine gas, sufficiently mixing, and reacting at normal pressure to obtain chlorine trifluoride mixed gas; condensing the chlorine trifluoride mixed gas to obtain a chlorine trifluoride crude product; and rectifying, purifying and condensing the chlorine trifluoride crude product to obtain a chlorine trifluoride product. According to the method, chlorine trifluoride can be prepared in one step under the conditions of no catalyst and normal pressure, the process operation is simple, the reaction time is short, the temperature and pressure are easy to control, the reaction process is safe, and industrial production can be realized.
Owner:SICHUAN HONGHUA IND
Method for preparing X substituted aniline from X substituted nitrobenzene
InactiveCN101481314AReduce consumptionAvoid generatingOrganic compound preparationAmino compound preparationHydrogenation reactionOrtho position
The invention discloses a method for preparing X substituted aniline by catalytic hydrogenation of X substituted nitrobenzene; wherein the X can be any one of -F, -Cl, -Br, -OCH3, -OH or-R, R is saturated hydrocarbyl with one or more carbons and the position of X in the nitrobenzene is ortho position, or meta position, or para position of nitryl. The method comprises the following steps: adding X substituted nitrobenzene in a reaction kettle; and then adding ethanol and a supported catalyst; sealing the reaction kettle; completely replacing air in the reaction kettle with hydrogen; maintaining normal pressure in the reaction kettle and heating and stirring the mixture; introducing the hydrogen into the kettle after the temperature reaches 60 DEG C; maintaining the pressure in the kettle between 1.0 and 3.0 MPa; starting hydrogenation reaction and maintaining the temperature in the kettle between 60 and 90 DEG C during the hydrogenation process; and separating reaction mixture and the catalyst when the conversion rate reaches 95-99 percent after hydrogenation for 3 to 8 hours.
Owner:甘肃中科药源生物工程股份有限公司
Resin catalyst applied to preparation of phenol through decomposition of cumene hydroperoxide (CHP) and preparation method for resin catalyst
ActiveCN102698801AImprove oxidation resistanceExtended service lifeOrganic chemistryOrganic compound preparationOxidation resistantIon-exchange resin
The invention discloses a resin catalyst applied to preparation of phenol through decomposition of cumene hydroperoxide (CHP) and a preparation method for the resin catalyst. The preparation method comprises the following steps of: by a macroporous styrene ion exchange resin aggregation production process, adding a (methyl) crylic acid halothane-based ester monomer and the phenol, aggregating, sulfonating, and thus obtaining the resin catalyst. The prepared catalyst is high in oxidation resistance and mechanical strength, has long service life, can be widely applied in production, and has an extremely good application prospect in the field of preparation of the phenol through a CHP decomposition reaction.
Owner:KAIRUI ENVIRONMENTAL PROTECTION TECH
Method for preparing graphene by using magnetic rotating arc
The invention discloses a method for preparing graphene by using magnetic rotating arc, and belongs to the technical field of carbon nano-material preparation. The method adopts the magnetic rotatingarc as a reaction condition and a hydrocarbon compound as a raw material. The magnetic rotating arc is ignited in argon or a mixed gas atmosphere of argon and other gases, then a certain molar flow ofa hydrocarbon compound is continuously introduced into the arc region, the hydrocarbon compound is reacted under the initiation of the arc to generate graphene, hydrocarbon products, hydrogen and other products, and the solid product obtained after the reaction is collected to obtain the graphene. A result of characterization with a transmission electron microscope shows that the layer number ofthe prepared graphene is 3-10, and the size of graphene sheets is 100-300 nm. The method has the advantages of low energy consumption, large output, realization of high purity, good crystal form and few defects of the prepared graphene, simple device, low cost, no catalyst, continuousness in reaction, easiness in operation, and easiness in realization of industrialized production.
Owner:合肥碳艺科技有限公司
Method and device for continuously measuring mercury in hydrocarbon-containing gas
ActiveCN103487553ADetection line lowReduce mercury concentrationPreparing sample for investigationContinuous measurementMeasurement device
The invention provides a method for measuring mercury in hydrocarbon-containing gas. The method comprises the following specific steps: applying the hydrocarbon-containing gas to be measured to a metal oxygen carrier under a heating environment; converting hydrocarbon substances, which disturb mercury measurement, into carbon dioxide and water through the oxidizing reaction of the hydrocarbon substances and the metal oxygen carrier; removing water vapor in the reacted gas; measuring the mercury through a mercury vapor analyzer. The invention also provides a measurement device for implementing the method. The measurement device is structurally characterized in that a first mass flow meter is in sequential pipeline connection with a first valve, a first reactor, a dehumidification device and the mercury vapor analyzer, wherein the first reactor is used for accommodating the metal oxygen carrier and is arranged in an electric heating furnace; the electric heating furnace is connected with a temperature controller; the dehumidification device is connected with a refrigerator. The hydrocarbon substances can be oxidized into the carbon dioxide and the water through the metal oxygen carrier at high temperature, so that the influence on the mercury vapor analyzer caused by the hydrocarbon substances is eliminated, the hydrocarbon substances can be removed, and meanwhile the influence on the mercury vapor analyzer caused by other interference gas can be eliminated. The measurement device is easy to operate and high in applicability.
Owner:HUAZHONG UNIV OF SCI & TECH
Method for quickly and continually preparing powdery caramel pigment by using spray drying technology
The invention discloses a method for preparing a powdery caramel pigment by using a spray drying technology, belonging to the technical field food processing. In the method, the powdery caramel pigment is prepared by undergoing a Mailard reaction on reducing sugar or an oligosaccharide or polysaccharide which is hydrolyzed into reducing sugar under the acid condition and a compound for providing amino by adopting a spray drying technology. The spray drying reaction conditions are that: (1) the temperature of the hot air inlet of spray drying equipment is 160-270 DEG C; and (2) the reaction time is controlled at 3-60 seconds by controlling the flow of hot air entering the spray drying equipment and the flow of a mixed solution pumped into the spray drying equipment or selecting the lengths of heat-preserving flow channels of a spray drying chamber and a gas-solid separating system. The method has the characteristics of short time and flow needed for preparing a food caramel pigment, continuous reaction process, easiness for controlling the quality, high solid content, contribution to realizing industrial preparation, and the like.
Owner:上海爱普食品工业有限公司
Method for synthesizing cyclohexanone dimer by continuous catalytic reaction and distillation
InactiveCN101544553AHigh selectivityAvoid contact opportunitiesPhysical/chemical process catalystsOrganic compound preparationCyclohexanoneReaction field
The invention discloses a method for synthesizing cyclohexanone dimer by continuous catalytic reaction and distillation. The method comprises the following steps that: a catalytic reaction and distillation device shown in a figure is adopted, and cyclohexanone enters the a tower from the middle part of the tower; a cyclohexanone dimer and water azeotropic mixture obtained by the condensation of overhead vapor is subjected to continuous low layer resultant water separation in a water knockout vessel, and the upper layer cyclohexanone flows into the top of the tower; and tower bottom residue is heated by a reboiler, the temperature of the residue is controlled to be 250 to 280 DEG C, and 60 to 90 mass percent cyclohexanone dimer can be obtained from liquid discharged from the bottom of the tower. The method adopts continuous catalytic reaction and distillation technology and removes water in products away from a reaction field in time, thereby promoting a reaction to move toward the direction of the formation of the cyclohexanone dimer; meanwhile, the method separates the products of the reaction from a stripping section at the lower part to further eliminate the opportunity for the products of the reaction to contact a catalyst, thereby improving the selectivity of the cyclohexanone dimer, ensuring continuous reaction, high production efficiency and high selectivity of the cyclohexanone dimer, and facilitating industrial production.
Owner:ZHEJIANG UNIV +1
Fluidized bed without sieve plate and preparation method of boron trichloride
ActiveCN103506056BReduce energy consumptionSolve the problem of easy clogging of sieve plate holesBoron halidesChemical/physical processesBorideAlkaline earth metal
Owner:昆明先导新材料科技有限责任公司
Treatment method of wastewater containing vanadium
ActiveCN110104834AEasy to separateEfficient recyclingWater contaminantsMultistage water/sewage treatmentDesorptionResource recovery
The invention provides a treatment method of waste water containing vanadium. The method comprises the steps that ferrous sulfate is added into the waste water containing the vanadium for a reaction;after the reaction is completed, the pH of the mixed solution is adjusted to be 3-4.5, heating and stirring are conducted for a reaction, after some time, the pH of the mixed solution is adjusted to be 6-6.5, stirring is continued, after the reaction is completed, solid-liquid separation is conducted, and ferric vanadate precipitate and a solution containing chromium are obtained; phosphoramidic acid resin is utilized for adsorbing the solution containing the chromium, after adsorption is completed, the phosphoramidic acid resin is subjected to desorption, and the purified solution containingthe chromium is obtained. By improving the technology and controlling conditions, reduction of hexavalent chromium and preparation of polyferric sulfate are conducted in the same reaction system, efficient separation and resource recovery for the vanadium and chromium in the waste water containing the vanadium are achieved to the greatest extent, the recovery rate of the vanadium element reaches 90% or above, and the recovery rate of the chromium element reaches 93% or above. The whole reaction is continuous, the operation is simple, the technology process is shortened, and the preparation method has a good application prospect.
Owner:承德燕北冶金材料有限公司
Magnetorheological-effect-based straight screwdriver with positioning and anti-slipping functions
InactiveCN104907982AWith positioning anti-slip functionRapid responseSpannersWrenchesMagnetorheological fluidMechanical engineering
The invention relates to a magnetorheological-effect-based straight screwdriver with the positioning and anti-slipping functions. The magnetorheological-effect-based straight screwdriver with the positioning and anti-slipping functions is used for preventing the phenomenon that a bolt head is damaged due to the fact that relative slippage occurs between a screwdriver head and a bolt occurs when an operator overexert himself / herself to tighten or loosen the bolt through a screwdriver. The magnetorheological-effect-based straight screwdriver with the positioning and anti-slipping functions is composed of a shell, magnetorheological fluid, an isolation ring, an electromagnetic coil, a piston, a sealing ring, a piston rod, a cross bar, connecting rods, clamping rods, a straight screwdriver head, a size compensator, a sliding block, a button and a sliding groove. When the straight screwdriver head is stretched into a bolt head, a user slides the sliding block upwards to make the clamping rods clamp the bolt head tightly and then presses the button to power on the straight screwdriver, relative slippage will not be produced by the screwdriver head, the bolt head and the clamping rods when the screwdriver is rotated, and finally the bolt is tightened or loosened on the condition of guaranteeing that the bolt head is not scratched; the user presses the button again to power off the straight screwdriver and slides the sliding block downwards to make the clamping rods to loosen the bolt head, and then the whole bolt tightening or loosening process is completed.
Owner:南通凤成工具有限公司
A hydrogenation catalyst and a preparation method thereof
ActiveCN109718796ALarge apertureLarge hole volumeMetal/metal-oxides/metal-hydroxide catalystsRefining to eliminate hetero atomsMicroreactorSurface phase
The invention discloses a hydrogenation catalyst and a preparation method thereof. A reaction system adopted for preparation of the hydrogenation catalyst comprises N micro-reactors connected in series, the first micro-reactor is an impinging stream reactor, acidic and alkaline materials enter the first micro-reactor for a neutralization reaction, and products sequentially enter the second micro-reactor to the (N-1)th micro-reactor with the pH value swing, wherein the reaction temperature is 20-30 DEG C lower than that of the first micro-reactor when the pH value swings towards the alkali sidewhile the reaction temperature is 20-30 DEG C higher than that of the first micro-reactor when the pH value swings towards the acid side, and the obtained reaction product enters the Nth micro-reactor to be subjected to an aging reaction and is roasted to obtain the hydrogenation catalyst. The acidic material is an acidic aluminum salt solution and an acidic active metal solution, and the alkaline material is an alkaline aluminate solution and an alkaline active metal solution. The hydrogenation catalyst prepared by the method is relatively large in pore diameter and pore volume, uniform in grain size and high in catalyst surface phase active metal density, eliminates an amplification effect, and is suitable for being applied to hydrodesulfurization and denitrification processes of residual oil.
Owner:CHINA PETROLEUM & CHEM CORP +1
Composite molecular sieve film based on paper-shaped gradient metal microfibers as well as preparation method and application thereof
InactiveCN103447064ASimple methodIncrease surface areaMolecular sieve catalystsWater contaminantsFilm baseCatalytic oxidation
The invention discloses a composite molecular sieve film based on paper-shaped gradient metal microfibers as well as a preparation method and an application thereof. The preparation method of the composite molecular sieve film comprises the steps of dosing a tackiness agent, a metal fibre and water according to the weight ratio at 1 to (1-3) to (100-500), utilizing a wet method paper technology to prepare a front driving body, sintering to prepare a paper-shaped sintering metal microfiber carrier with a three-dimensional network structure, utilizing a NaOH water solution and a H2SO4 water solution to soak, and sintering so as to obtaining the carrier; utilizing cetyl trimethyl ammonium bromide, ethyl orthosilicate and ammonium hydroxide to prepare a seed crystal; enabling a seed crystal solution to dissolve in an ethanol solution so as to obtain a molecular sieve powder impregnation liquid, putting the carrier into the molecular sieve powder impregnation liquid to soak, drying so as to obtain the paper-shaped sintering metal microfiber carrier of a pre-planting plant; washing and calcining a product after secondary growth so as to obtain the paper-shaped gradient metal microfiber composite molecular sieve film. The composite molecular sieve film provided by the invention has the advantages of being continuously compact, adjustable in thickness, applicable tp the wet-type catalytic oxidation of phenolic wastewater, and high in reaction efficiency.
Owner:SOUTH CHINA UNIV OF TECH
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