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33results about How to "Realize scale-up production" patented technology
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Preparation method of modified fly ash adsorbent used in phosphorous-containing waste water treatment
InactiveCN102728311AGood effectSimple and safe operationOther chemical processesWater/sewage treatment by sorptionEutrophicationWastewater
The invention discloses a preparation method of a modified fly ash adsorbent used in phosphorous-containing waste water treatment. According to the invention, fly ash is subjected to an alkali modification process and an acid modification process; the modified fly ash is mixed with an absorbing auxiliary agent, such that the modified fly ash adsorbent is obtained. When the modified fly ash adsorbent provided by the invention is used for treating phosphorous-containing waste water with a concentration of 25mg / L, the effect is substantial, and a national first-grade discharging standard can be achieved. Compared with prior arts, the treatment method provided by the invention is advantaged in resource reasonable utilization, consumption reduction, time saving, effort saving, and substantial effect. Therefore, a novel concept is provided for fly ash comprehensive utilization and water body eutrophication controlling.
Owner:HUBEI FORBON TECH +1
Activation and regeneration method of deactivated catalyst in process of synthesizing dimethyl oxalate by CO
ActiveCN106861775AEfficient removalDredge internal channelsCatalyst regeneration/reactivationPreparation by carbon monoxide or formate reactionNitrogen gasHigh pressure
The invention discloses an activation and regeneration method of a deactivated catalyst in a process of synthesizing dimethyl oxalate by CO. The activation and regeneration method mainly comprises the following steps: washing the deactivated catalyst with alkali at high temperature and under high pressure and removing organic matters attached on the surface of the catalyst; immersing with a pore-expanding agent solution and roasting at 400 DEG C to 700 DEG C to remove deposited carbon attached on the surface of the catalyst and dredge a blocked pore channel of the catalyst; purging with mixed gas of nitrogen gas and hydrogen chloride to disperse an active Pd material which grow large by agglomeration again; immersing with alkali liquid and fixing the Pd material, which is dispersed again, on a carrier; finally, reducing with the catalyst through two steps including a wet process and a dry process, so as to reduce palladium oxide into palladium. The deactivated catalyst is subjected to activation treatment by the method and the agglomerated and sintered active Pd material is effectively dispersed; the activity of the catalyst can be recovered to be about 96 percent of original activity. The method provided by the invention is simple in process, easy to operate and low in cost, and circulating utilization of a noble metal catalyst is realized.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
Multilayer graphene and preparation method thereof
ActiveCN110205603AQuality improvementRealize scale-up productionChemical vapor deposition coatingGas phaseMetallurgy
The invention provides multilayer graphene and a preparation method thereof. The preparation method comprises the following steps: a copper foil is provided; the copper foil is bonded on a substrate;the copper foil on the substrate is bonded after annealing; and graphene is grown on the surface of the copper foil after annealing through chemical vapor deposition to obtain the multilayer graphene,wherein a gap is formed between the copper foil and the substrate, and is smaller than 10 microns. Through pretreatment of the copper foil, when the chemical vapor deposition is performed on the copper foil, different airflow layers can be formed on the upper and lower surfaces of the copper foil, so that the continuous catalysis of carbon sources is realized, and the high-quality multilayer graphene is finally obtained. In addition, the method is not limited by the size, can realize the amplification production of the multilayer graphene, and achieves excellent industrialization prospect.
Owner:BEIJING GRAPHENE INST +1
Device and method for preparing amorphous carbon and nitrogen thin films on surface of silicon
ActiveCN106011745AEvenly distributedThe relative content is controllableVacuum evaporation coatingSputtering coatingNitrogen gasVacuum chamber
The invention discloses a device and method for preparing amorphous carbon and nitrogen thin films on the surface of silicon. The device is a pulse cathode electric arc device assisted by an ion source. The preparation device includes the following steps that a silicon substrate which is chemically cleaned in advance is dried and placed on a rotating sample table; vacuumization is performed, argon gas is led into a vacuum chamber, and the surface of the silicon substrate is physically cleaned through an ion sputtering source; and high-purity graphite serves as a cathode target material of a pulse electric arc, the pulse discharging frequency is adjusted, nitrogen gas is led at the same time, the ion source is opened, and the atomization and ionization nitrogen-doped amorphous carbon and nitrogen thin films are prepared. By means of the device and method, the content of carbon / nitrogen atoms and carbon-nitrogen bonds / carbon-carbon bonds in the amorphous carbon and nitrogen thin films is adjustable, and the carbon and nitrogen bonding types and the graphite-like nitrogen / pyridine-like nitrogen structures are controllable.
Owner:BEIJING WUKE GUOHUA TECH CO LTD
Synthetic method of 2-chloro-4-phenyl quinazoline
InactiveCN107082765ASimple post-processingRealize scale-up productionOrganic chemistryOrganic synthesisBenzoyl chloride
The invention relates to a synthetic method of 2-chloro-4-phenyl quinazoline and belongs to the technical field of organic synthetic chemistry. The synthetic method comprises the following steps of: by taking o-benzoylbenzoic acid as a raw material, performing an acylating chlorination reaction to generate o-benzoyl benzoyl chloride; performing an amidation reaction to generate o-benzoyl benzamide; performing a Hofmann degradation reaction to generate 2-amino benzophenone; and performing an annulations reaction to generate 4-phenyl quinazoline-2(1H)-one and chlorinating the 4-phenyl quinazoline-2(1H)-one by phosphorus oxychloride to finally generate 2-chloro-4-phenyl quinazoline, wherein the total yield is 20.8%. Compared with other methods, the reagents used by the route are low in price and easily available, and the post-treatment is simple. In the reaction process, the reaction conditions and synthetic processes thereof are explored, so that a simple and feasible synthetic route is provided for synthesizing 2-chloro-4-phenyl quinazoline, thereby realizing amplified production.
Owner:CHANGZHOU UNIV
Graphene coated lead composite material and preparation method thereof as well as lead-acid battery
ActiveCN103956484AImprove mechanical propertiesGood capacitance advantageLead-acid accumulatorsCell electrodesCapacitanceCharge discharge
The invention discloses a graphene coated lead composite material and a preparation method thereof as well as a lead-acid battery. The graphene coated lead composite material comprises lead particles and a graphene layer covering the lead particles; the graphene layer is further doped with carbonate and stannous sulfate, and the mass ratio of carbonate to stannous sulfate to graphene in the graphene layer is (1-4):(0.01-0.06):1. The preparation method of the graphene coated lead composite material comprises the steps of preparing a precursor mixture of the graphene coated lead composite material and performing solvothermal reaction treatment on the mixture. The anode and the cathode of the lead-acid battery contain the graphene coated lead composite material. The graphene coated lead composite material is high in structural stability, electrical conductivity and capacitive performance; the preparation method of the graphene coated lead composite material is capable of guaranteeing even size distribution, and also is high in operability and environmentally friendly, and consequently, enlarged production can be realized. The lead-acid battery is excellent in specific capacity, charge-discharge performance and charge-discharge cycle performance, and long in service life.
Owner:HENGYANG RITAR POWER CO LTD
Thermoelectricity material and preparation method thereof
ActiveCN103050618ALow costSimple preparation techniqueThermoelectric device manufacture/treatmentThermoelectric device junction materialsSolid phasesHigh conductivity
The invention relates to a thermoelectricity material and a preparation method thereof, belonging to the field of inorganic materials. The thermoelectricity material is synthesized by an inorganic high-temperature solid-phase one-step synthesis method. A CsxRE2Cu6-xTe6 compound synthesized by the method belongs to a hexagonal crystal series, a space group is P63 / m. According to the primary thermoelectricity performance test of CsxRE2Cu6-xTe6 (RE=La, Ce, Pr), the compound of the series has relative high conductivity, a medium Seebeck coefficient and relative low thermal conductivity, and the ZT value is 0.26 (La, 614K), 0.17 (Ce, 660K) and 0.23 (La, 660K). The compound of the series probably has potential application value of thermoelectricity.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
Amphipathic alginate with response to light and pH and stable pickering emulsion thereof
The invention discloses amphipathic alginate with response to light and a pH and stable pickering emulsion thereof. The emulsion is prepared from an oil phase and a water phase, stabilizers of the emulsion are nano-silica, the host molecules alginate (Alg-beta-CD) and guest molecules Azo-PEG, a volume ratio of the oil phase to the water phase is 1 to (0.1 to 10), the concentration of the silica dispersed in the water phase is 2wt%, the concentration of the (Alg-beta-CD) dispersed in the water phase is 1 g / L, and the concentration of the Azo-PEG dispersed in the water phase is 2 g / L. The pickering emulsion is high in stability, and has pH responsiveness and light responsiveness, by adjusting the pH or illumination, controllable release of an internal phase medicine can be achieved, and meanwhile, a preparation method is simple in operation process, and has large preparation throughput so that scale-up production of the emulsion can be achieved more easily, and the emulsion has wide application in the fields of make-up, biology, pesticide drug delivery and the like, and very good application and popularization values.
Owner:HAINAN UNIVERSITY
Preparation and application method for composite phosphorus removing agent for treating high-concentration phosphorus-containing waste water
ActiveCN102583622ASimple and safe operationSimple ingredientsWater/sewage treatment by sorptionHigh concentrationSilicon dioxide
The invention relates to a composite phosphorus removing agent for treating high-concentration phosphorus-containing waste water and a preparation and application method. The composite phosphorus removing agent is obtained by using zeolite, sodium silicate, calcium oxide and water as raw materials through hydrothermal synthesis; the composite phosphorus removing agent contains 2.0 to 3.0 percent of aluminum, 18 to 20 percent of calcium and 25 to 28 percent of silicon dioxide; and 4.0g / L of composite phosphorus removing agent is added into 20 to 100mg / L of phosphorus-containing waste water, the waste water is stirred for one hour, and the phosphorus content of the effluent reaches national first-grade discharge standard. The composite phosphorus removing agent is suitable for treating the high-concentration phosphorus-containing waste water, and is not required to be regulated by using alkali after the composite phosphorus removing agent is added; the method is simple; and the precipitated crystal can be recycled for over 12 times.
Owner:HUBEI FORBON TECH
Method for preparing emulsion by gas-driven emulsification
InactiveCN110681309APlay a shearing roleStrong shear forceTransportation and packagingMixingActive agentOil phase
The invention discloses a method for preparing an emulsion by gas-driven emulsification. The method is as follows: (1) adding an oil phase and a surfactant into water, performing heating, and performing uniform mixing; (2) cooling the solution system in the step (1), then sending the solution system and a gas to a gas-driven emulsification element, and performing emulsification to obtain a primarily-emulsified emulsion; and (3) continuously introducing the primarily-emulsified emulsion in the step (2) to the gas-driven emulsification element, and circulating the emulsification operation to obtain the emulsion. An emulsification apparatus and the emulsification operation involved by the method are simple, the emulsification efficiency is high, and scale enlargement is easy. The prepared emulsion has small and controllable droplet particle sizes, and uniform dispersion, and has wide application prospects.
Owner:ZHEJIANG UNIV OF TECH
A kind of thermoelectric material and preparation method thereof
ActiveCN103050618BLow costSimple preparation techniqueThermoelectric device manufacture/treatmentThermoelectric device junction materialsSynthesis methodsInorganic materials
The invention relates to a thermoelectricity material and a preparation method thereof, belonging to the field of inorganic materials. The thermoelectricity material is synthesized by an inorganic high-temperature solid-phase one-step synthesis method. A CsxRE2Cu6-xTe6 compound synthesized by the method belongs to a hexagonal crystal series, a space group is P63 / m. According to the primary thermoelectricity performance test of CsxRE2Cu6-xTe6 (RE=La, Ce, Pr), the compound of the series has relative high conductivity, a medium Seebeck coefficient and relative low thermal conductivity, and the ZT value is 0.26 (La, 614K), 0.17 (Ce, 660K) and 0.23 (La, 660K). The compound of the series probably has potential application value of thermoelectricity.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
A kind of method for preparing m-xylylene diisocyanate
The invention relates to a method used for preparing m-xylylene diisocyanate. The method comprises following steps: m-xylylene diamino ethyl formate is dissolved in an organic solvent, under protective gas purging, thermal decomposition reaction is carried out so as to obtain the m-xylylene diisocyanate. The preparation technology is simple and convenient, is friendly to the environment, is low incost, and is capable of realizing amplification production; the adopted reaction solvent can be recycled; and the product yield is high.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI
Core-shell quantum dot and preparation method thereof, quantum dot film and light emitting diode
ActiveCN111662715AImprove efficiencyImprove stabilityMaterial nanotechnologySolid-state devicesQuantum dotCarboxylic acid
The invention discloses a preparation method of core-shell quantum dots. According to the invention, a first zinc carboxylate precursor with a carbon chain length of 2-6 and a second zinc carboxylateprecursor with a carbon chain length of 10-22 are adopted as composite cation precursors in an InP nuclear quantum dot coating process to obtain core-shell quantum dots with less defect inside and controllable wavelength; and a quantum dot film and a light emitting diode which are prepared from the core-shell quantum dots are relatively high in stability in a room-temperature environment and a high-temperature and high-humidity acceleration test, and can be used for manufacturing a light emitting element with long service life.
Owner:NANJING TECH CORP LTD
Adsorbent for treating dye wastewater in different concentrations and preparation method and application
InactiveCN103285816ASimple and safe operationSimple ingredientsOther chemical processesWaste water treatment from textile industrySorbentPhysical chemistry
The invention discloses an adsorbent for treating dye wastewater in different concentrations and a preparation method and an application. The adsorbent is prepared from the raw materials of cupric nitrate, trimesic acid and graphene oxide by a certain proportion. The preparation method comprises the following steps: a) weighing the raw materials of cupric nitrate, trimesic acid and graphene oxide, and pouring the raw materials to a reaction kettle after ultrasonic oscillation, wherein the reaction temperature is 110-130 DEG C, the reaction pressure is 130-160kpa; b) using temperature programming, wherein the heating rate is 4-6 DEG C / min and the reaction time is 8-10 hours, cooling to 20-30 DEG C, and filtering to obtain a blue-green solid substance; and c) washing: washing the blue-green solid substance, drying at 160-190 DEG C for 2-4 hours to obtain the blue-green adsorbent. The adsorbent is strong in adsorption performance, can be balanced within a short time, and is suitable for quick treatment of dye wastewater. The adsorbent can be recycled for many times after analysis by an analytical agent. The adsorption rate after 10 times of recycles is 90-94%. The method is simple, and the product obtained is high in purity, good in dispersibility and good in using effect.
Owner:HUBEI UNIV
Continuous synthesis method of ethoxymethylene malononitrile
ActiveCN111072518AAvoid decompositionRealize scale-up productionCarboxylic acid nitrile preparationOrganic compound preparationAcetic anhydrideReaction temperature
The invention provides a continuous synthesis method of ethoxymethylene malononitrile. The method comprises the following steps: continuously introducing malononitrile, triethyl orthoformate and acetic anhydride into continuous reaction equipment for substitution reaction to obtain ethoxymethylene malononitrile, and continuously discharging the generated ethoxymethylene malononitrile in the substitution reaction process, wherein the molar ratio of malononitrile to triethyl orthoformate to acetic anhydride is 1: (0.9-6.0): (2.0-6.0). The continuous reaction equipment is adopted, and the quantity of materials participating in the reaction in unit time is greatly reduced so that a high-temperature dangerous area is reduced and the safety risk is greatly reduced. The raw materials can be instantly heated to the reaction temperature through the continuous reactor, raw material decomposition caused by the long-time heating process is avoided, and the yield is remarkably increased. In addition, secondary toxic solvents such as methylbenzene are not needed in the reaction process.
Owner:ASYMCHEM LAB TIANJIN
Preparation method of niraparib intermediate (S)-3-(4-bromophenyl) piperidine
PendingCN111808016ALow costAvoid Chiral SwitchingOrganic chemistryBiochemical engineeringCombinatorial chemistry
The invention discloses a preparation method of a niraparib intermediate that is (S)-3-(4-bromophenyl) piperidine, which comprises the following steps: by using chiral 1-phenylethylamine as a raw material, carrying out alkylation, condensation, cyclization and reduction, and finally removing an amino protection group to obtain the (S)-3-(4-bromophenyl) piperidine. The preparation method of the (S)-3-(4-bromophenyl) piperidine has the advantages of short route, few steps, simple and convenient process operation, avoidance of use of dangerous reagents, highly toxic reagents and irritant malodorous reagents, reduction of potential safety hazards to operators, reduction of the operation safety level of production, environmental protection, and facilitation of industrialization.
Owner:成都正善达生物医药科技有限公司
A method for preparing two-dimensional metal-organic framework materials and its application
ActiveCN107383386BMild reaction conditionsRapid responsePreparation by isomerisationOrganic-compounds/hydrides/coordination-complexes catalystsPhysical chemistryMetal-organic framework
Owner:NANJING TECH UNIV
Preparation method suitable for industrial scale-up production of mannitol eutectic auxiliary material
InactiveCN113788849AHigh yieldHigh purityGroup 2/12 organic compounds without C-metal linkagesCalcium organic compoundsPhysical chemistryMannitol
The invention discloses a preparation method suitable for industrial scale-up production of a mannitol eutectic auxiliary material, and belongs to the technical field of medicines. The preparation method comprises the following steps of: mixing mannitol with calcium chloride, adding a proper amount of solvent, and stirring to obtain an eutectic crystal. The mannitol eutectic auxiliary material is prepared by using a suspension crystallization method, and the preparation method is high in yield, low in solvent consumption, low in energy consumption and pure in product, and has feasibility of scale-up production .
Owner:CHINA PHARM UNIV
Graphene-coated lead composite material and preparation method thereof, lead-acid battery
ActiveCN103956484BImprove mechanical propertiesGood capacitance advantageLead-acid accumulatorsCell electrodesEnvironmental resistanceCharge discharge
The invention discloses a graphene coated lead composite material and a preparation method thereof as well as a lead-acid battery. The graphene coated lead composite material comprises lead particles and a graphene layer covering the lead particles; the graphene layer is further doped with carbonate and stannous sulfate, and the mass ratio of carbonate to stannous sulfate to graphene in the graphene layer is (1-4):(0.01-0.06):1. The preparation method of the graphene coated lead composite material comprises the steps of preparing a precursor mixture of the graphene coated lead composite material and performing solvothermal reaction treatment on the mixture. The anode and the cathode of the lead-acid battery contain the graphene coated lead composite material. The graphene coated lead composite material is high in structural stability, electrical conductivity and capacitive performance; the preparation method of the graphene coated lead composite material is capable of guaranteeing even size distribution, and also is high in operability and environmentally friendly, and consequently, enlarged production can be realized. The lead-acid battery is excellent in specific capacity, charge-discharge performance and charge-discharge cycle performance, and long in service life.
Owner:HENGYANG RITAR POWER CO LTD
A kind of device and method for preparing amorphous carbon and nitrogen film on silicon surface
ActiveCN106011745BEvenly distributedThe relative content is controllableVacuum evaporation coatingSputtering coatingCarbon–carbon bondNitrogen gas
The invention discloses a device and method for preparing amorphous carbon and nitrogen thin films on the surface of silicon. The device is a pulse cathode electric arc device assisted by an ion source. The preparation device includes the following steps that a silicon substrate which is chemically cleaned in advance is dried and placed on a rotating sample table; vacuumization is performed, argon gas is led into a vacuum chamber, and the surface of the silicon substrate is physically cleaned through an ion sputtering source; and high-purity graphite serves as a cathode target material of a pulse electric arc, the pulse discharging frequency is adjusted, nitrogen gas is led at the same time, the ion source is opened, and the atomization and ionization nitrogen-doped amorphous carbon and nitrogen thin films are prepared. By means of the device and method, the content of carbon / nitrogen atoms and carbon-nitrogen bonds / carbon-carbon bonds in the amorphous carbon and nitrogen thin films is adjustable, and the carbon and nitrogen bonding types and the graphite-like nitrogen / pyridine-like nitrogen structures are controllable.
Owner:BEIJING WUKE GUOHUA TECH CO LTD
Adsorbent for treating dye wastewater in different concentrations and preparation method and application
InactiveCN103285816BSimple and safe operationSimple ingredientsOther chemical processesWaste water treatment from textile industrySorbentPhysical chemistry
The invention discloses an adsorbent for treating dye wastewater in different concentrations and a preparation method and an application. The adsorbent is prepared from the raw materials of cupric nitrate, trimesic acid and graphene oxide by a certain proportion. The preparation method comprises the following steps: a) weighing the raw materials of cupric nitrate, trimesic acid and graphene oxide, and pouring the raw materials to a reaction kettle after ultrasonic oscillation, wherein the reaction temperature is 110-130 DEG C, the reaction pressure is 130-160kPa; b) using temperature programming, wherein the heating rate is 4-6 DEG C / min and the reaction time is 8-10 hours, cooling to 20-30 DEG C, and filtering to obtain a blue-green solid substance; and c) washing: washing the blue-green solid substance, drying at 160-190 DEG C for 2-4 hours to obtain the blue-green adsorbent. The adsorbent is strong in adsorption performance, can be balanced within a short time, and is suitable for quick treatment of dye wastewater. The adsorbent can be recycled for many times after analysis by an analytical agent. The adsorption rate after 10 times of recycles is 90-94%. The method is simple, and the product obtained is high in purity, good in dispersibility and good in using effect.
Owner:HUBEI UNIV
A method of using microcontroller modular reaction device to prepare Vicprammonium bromide intermediate
ActiveCN104829676BImprove conversion rateProduction process yield increaseSteroidsReaction temperatureKetone
The invention discloses a method for preparing a vecuronium bromide intermediate by employing a microchannel modularization reaction device. The method comprises the following steps: respectively pumping water and a piperidine solution of 2alpha,3alpha-epoxy-16alpha-bromine-17-ketone-5-alpha-androstane into the microchannel modularization reaction device; controlling the reaction temperature to be 100-150 DEG C and the reaction residence time to be 30-45 minutes in a micro-reactor of the microchannel modularization reaction device; after reacting, distilling reaction liquid at reduced pressure, and removing water and piperidine; dissolving the residual liquid with a dilute hydrochloric acid solution, and adjusting the pH value to be 2-3; adding dichloromethane to wash impurities, skimming, and taking an upper water phase; adjusting the pH value of the water phase to be 9-10 with a NaOH water solution, and extracting with dichloromethane; and drying the extracted organic phase with anhydrous sodium sulfate, and carrying out vacuum concentration, so as to obtain the vecuronium bromide intermediate 2beta,16beta-dipiperidino-3alpha-hydroxy-17-ketone-5alpha-androstane.
Owner:NANJING TECH UNIV
Preparation and application method for composite phosphorus removing agent for treating high-concentration phosphorus-containing waste water
ActiveCN102583622BSimple and safe operationSimple ingredientsWater/sewage treatment by sorptionHigh concentrationSilicon dioxide
The invention relates to a composite phosphorus removing agent for treating high-concentration phosphorus-containing waste water and a preparation and application method. The composite phosphorus removing agent is obtained by using zeolite, sodium silicate, calcium oxide and water as raw materials through hydrothermal synthesis; the composite phosphorus removing agent contains 2.0 to 3.0 percent of aluminum, 18 to 20 percent of calcium and 25 to 28 percent of silicon dioxide; and 4.0g / L of composite phosphorus removing agent is added into 20 to 100mg / L of phosphorus-containing waste water, the waste water is stirred for one hour, and the phosphorus content of the effluent reaches national first-grade discharge standard. The composite phosphorus removing agent is suitable for treating the high-concentration phosphorus-containing waste water, and is not required to be regulated by using alkali after the composite phosphorus removing agent is added; the method is simple; and the precipitated crystal can be recycled for over 12 times.
Owner:HUBEI FORBON TECH
A kind of activation regeneration method of CO synthesis dimethyl oxalate deactivation catalyst
ActiveCN106861775BEfficient removalDredge internal channelsCatalyst regeneration/reactivationPreparation by carbon monoxide or formate reactionHigh pressureNitrogen gas
The invention discloses an activation and regeneration method of a deactivated catalyst in a process of synthesizing dimethyl oxalate by CO. The activation and regeneration method mainly comprises the following steps: washing the deactivated catalyst with alkali at high temperature and under high pressure and removing organic matters attached on the surface of the catalyst; immersing with a pore-expanding agent solution and roasting at 400 DEG C to 700 DEG C to remove deposited carbon attached on the surface of the catalyst and dredge a blocked pore channel of the catalyst; purging with mixed gas of nitrogen gas and hydrogen chloride to disperse an active Pd material which grow large by agglomeration again; immersing with alkali liquid and fixing the Pd material, which is dispersed again, on a carrier; finally, reducing with the catalyst through two steps including a wet process and a dry process, so as to reduce palladium oxide into palladium. The deactivated catalyst is subjected to activation treatment by the method and the agglomerated and sintered active Pd material is effectively dispersed; the activity of the catalyst can be recovered to be about 96 percent of original activity. The method provided by the invention is simple in process, easy to operate and low in cost, and circulating utilization of a noble metal catalyst is realized.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
Multilayer graphene and its preparation method
ActiveCN110205603BQuality improvementRealize scale-up productionChemical vapor deposition coatingChemical treatmentCopper foil
The invention provides multi-layer graphene and a preparation method thereof, comprising the following steps: providing a copper foil; laminating the copper foil on a substrate; annealing the copper foil bonded to the substrate; performing a chemical reaction on the surface of the annealed copper foil Graphene is grown by vapor deposition, multi-layer graphene; wherein, there is an interval between the copper foil and the substrate, and the interval is less than 10 μm. This method pre-treats the copper foil so that different gas flow layers can be constructed on the upper and lower surfaces of the copper foil during chemical vapor deposition, so as to achieve continuous catalysis of the carbon source and finally obtain high-quality multilayer graphene. . In addition, the method of the present invention is not limited by size, and can realize the scale-up production of multi-layer graphene, and has good industrialization prospects.
Owner:BEIJING GRAPHENE INST +1
A kind of synthetic method of 1h-3-pyrrolidone compound
ActiveCN111423354BSimple production processGentle production processOrganic chemistryOrganic-compounds/hydrides/coordination-complexes catalystsDiketoneOrganic solvent
The present invention provides a kind of synthetic method of 1H-3-pyrrolidone compound, take aliphatic primary amine and β-diketone compound as raw material, in organic solvent, mix evenly with iron complex catalyst and copper salt cocatalyst, in React at 40-110°C for 8-12 hours. After the reaction, separate and purify to obtain 1H-3-pyrrolidone compounds. The product synthesized by the method has a purity of over 99% (as determined by HPLC) after purification, and a yield of up to 85%. The production process is simple, the production process is mild and the emission is low, so the process design can be directly carried out on the basis of laboratory work, and the scale-up production can be realized.
Owner:大连普莱瑞迪化学有限公司
adn/al/m x o y Nano-based composite energetic material and preparation method
ActiveCN104447148BEvenly dispersedRealize NanoizationExplosivesPressure gas generationSupercritical dryingAl powder
The invention relates to an ADN / A1 / MxOy-based nano composite energetic material and a preparation method thereof, the method comprises the following steps: dissolving metal (M) salt in a solvent to prepare a solution with a certain mole concentration, weighing an oxidizing agent ammonium dinitramide (ADN) and adding in the above solution, stirring until the solution is in a transparent, respectively adding a fuel nano aluminium powder and a proton trapping agent, stirring for 10-20 minutes, standing and aging for several days, and performing supercritical drying by carbon dioxide, and obtaining the ADN / A1 / MxOy-based nano composite energetic aerogel. The preparation method has the advantages of strong operationality, controllable proportion of oxidizing agent to fuel and simple required equipment, the obtained product has the advantage of good safety performance, is suitable for amplification production, and provides thinking for development of the future energetic material, the ADN / A1 / MxOy-based nano composite energetic material can completely or partially replace the current dangerous and complex energetic material possibly, and is an important direction for development of the nano energetic materials such as solid propellant, and explosives and powders.
Owner:HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
Synthesis method of 1H-3-pyrrolidone compound
ActiveCN111423354ASimple production processGentle production processOrganic chemistryOrganic-compounds/hydrides/coordination-complexes catalystsDiketonePtru catalyst
The invention provides a synthetic method of a 1H-3-pyrrolidone compound. The method comprises the following steps: taking aliphatic primary amine and a beta-diketone compound as raw materials, uniformly mixing the raw materials with an iron complex catalyst and a copper salt cocatalyst in an organic solvent, reacting at 40-110 DEG C for 8-12 hours, and separating and purifying after the reactionis finished, thereby obtaining the 1H-3-pyrrolidone compound. After purification, the purity of the product synthesized by the method can reach 99% or above (determined by HPLC), and the yield can reach 85%. And the production process is simple, the production process is mild, and the discharge amount is low, so that the process design can be directly carried out on the basis of laboratory work, and large-scale production is realized.
Owner:大连普莱瑞迪化学有限公司
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