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Method for preparing aromatic hydrocarbon by carrying out catalytic hydrodeoxygenation on lignin
InactiveCN104744204AWide variety of sourcesRaw materials are renewableHydrocarbon from oxygen organic compoundsEthylene productionIridiumPtru catalyst
The invention relates to a method for preparing aromatic hydrocarbon by carrying out catalytic hydrodeoxygenation on lignin. A catalyst used in the method provided by the invention comprises two active components, namely an acid site being one or combination of more than one of transition metal elements niobium, tantalum, zirconium, molybdenum, tungsten and rhenium and a hydrogenation or hydrogen transfer active site being one or more than one of ruthenium, platinum, palladium, iridium, iron, cobalt, nickel and copper. According to the method provided by the invention, a phenol group, a guaiacol group, a syringa phenolic group compound, natural lignin and industrial lignin are taken as raw materials, water is taken as a solvent, high selectivity catalytic hydrodeoxygenation is carried out at the temperature of 180-350 DEG C and hydrogen pressure of 0.1-5MPa or with methyl alcohol, isopropyl alcohol and formic acid as hydrogen sources, so that C6-C9 aromatic hydrocarbon is obtained, the highest mass yield of aromatic hydrocarbon is 10%, and content of aromatic hydrocarbon in product oil can be up to more than 75%. The method provided by the invention has the advantages that reproducible natural biomass can be used as a raw material, and the raw material is cheap and available; the water is taken as the solvent, so that a reaction process is environment-friendly; and content of aromatic hydrocarbon in the product is high, and reaction conditions are mild.
Owner:EAST CHINA UNIV OF SCI & TECH
Technique for preparing phosphatidyl serine rich in highly-unsaturated fatty acid
The invention relates to a technique for preparing diacylglyceryl-phosphorylserine rich in unsaturated acid, which is characterized in that a reactor is preheated to 30 to 60 DEG C, squid lecithin and L-serine at the mass ratio of 1:1-15 is added, phosphatidase D2-15U / g is also added as reaction substrate, gas R134a is pumped to lead the pressure of the reactor to reach 4-6MPa, the pressure is reduced after agitating reaction for 2 to 8 hours, R134a is recycled after the reaction mixture comes into a separation pot which is communicated with the reactor under the temperature of 30 to 60 DEG C, reaction mixture is collected from the a sample receiving port of the separation pot, at last, the reaction mixture is washed by using acetone and centrifuged for 5 to 10 min to separate the solid phase for further purification. The diacylglyceryl-phosphorylserine prepared by the invention rich in high unsaturated fatty acid as the medium in catalytic reaction of phosphatidase D has the advantages of simple technique, low equipment input, short reaction time, high content of unsaturated fatty acid and high yield and the neglecting of organic solvent. Furthermore, R134a can be completely recycled after reaction, which is beneficial to the separation of products and repeated use of enzyme.
Owner:OCEAN UNIV OF CHINA
Low-temperature aqueous-phase catalyst for lignin phenol derivative hydrodeoxygenation and preparation method thereof
InactiveCN104624225AHigh selectivityGood choiceMolecular sieve catalystsHydrocarbon from oxygen organic compoundsAlkanePhenol derivative
The invention relates to a low-temperature aqueous-phase catalyst for lignin phenol derivative hydrodeoxygenation and a preparation method thereof. The catalyst comprises a zeolite molecular sieve HBeta serving as a carrier and a load Ru, wherein the molar ratio of silicon to aluminum is 10-50, and the loading amount of Ru is 0.1 to 2%. The preparation method comprises the following steps: mixing measured aqueous solution of RuCl3 with a zeolite suspension, evaporating water and drying, and then reducing the obtained solid with hydrogen / argon mixed gas. A cyclic hydrocarbon (the conversion rate is greater than 98% and the selectivity is greater than 95%) is prepared at high selectivity under the relatively mild (100-150 DEG C and 1-4MPa) condition, so that the defects that the reaction conditions are harsh and the energy efficiency is low in the refining process of biomass pyrolysis oil can be overcome. The bifunctional catalyst provided by the invention has the advantages of simplicity and easiness in operation in the preparation process, stable physical and chemical properties, and direct application. At low temperatures, the catalyst shows excellent hydrodeoxygenation activity and extremely high selectivity of saturated hydrocarbons, has a simple and environment-friendly reaction process, and can be widely used in the refining of bio-gasoline.
Owner:NANKAI UNIV
Method for preparing adipic acid from glucaric acid
ActiveCN107556186AImprove catalytic performanceReaction process greenOrganic compound preparationCarboxylic acid esters preparationHydrogenAlcohol
The invention discloses a method for preparing adipic acid from glucaric acid. The method comprises the following steps: making glucaric acid react with hydrogen in a water solution or an alcoholic solution to obtain the adipic acid. When the glucaric acid reacts with the hydrogen in the water solution, a system utilizes a hydrodeoxygenation catalyst to perform hydrodeoxygenation reaction; when the glucaric acid reacts with the hydrogen in the alcoholic solution, an esterification catalyst, the hydrodeoxygenation catalyst and a hydrolysis catalyst are sequentially added into the system to respectively perform esterification reaction, the hydrodeoxygenation reaction and hydrolysis reaction. The method disclosed by the invention has the advantages of green and pollution-free reaction processand environmental friendliness; furthermore, production cost is reduced.
Owner:PEKING UNIV
Method of preparing glycol dimethyl ether through continuous etherification in fixed bed
InactiveCN105585459ASuitable for industrial scale productionReduce dependenceEther preparation by compound dehydrationReaction temperatureFixed bed
The invention discloses a method of preparing glycol dimethyl ether through continuous etherification in a fixed bed. In the method, with industrial ethylene glycol and industrial methanol as raw materials and with a solid acid catalyst, the glycol dimethyl ether is continuously prepared through the fixed bed, wherein the molar ratio of the ethylene glycol to the methanol is 0.02-10, the reaction temperature is 100-400 DEG C, the reaction pressure is 0.1-10 MPa and liquid space velocity is 0.3-2 / h. The method reaches more than 90% in conversion of the ethylene glycol and more than 74% in selectivity on the glycol dimethyl ether. The method is simple in processes, is high in product selectivity and is suitable for further large-scale production.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Method for preparing navodon septentrionalis skin anti-oxidative peptide liquid through in vitro simulation of gastrointestinal digestion
ActiveCN104263789AImprove hydrolysis efficiencyTake advantage ofFermentationBiotechnologyEnzyme digestion
The invention relates to a method for preparing navodon septentrionalis skin anti-oxidative peptide liquid through in vitro simulation of gastrointestinal digestion and belongs to the fields of food processing technology and protein utilization technology. The adopted preparation process comprises the following steps: preprocessing raw material navodon septentrionalis skin by shearing, drying, grinding, etc.; through an in vitro gastrointestinal digestion simulation technology, simulating a gastrointestinal digestion system through dual enzyme constructed from pepsase and trypsin; inactivating enzyme through a boiling water bath, regulating pH value and integrating twice centrifugal means to prepare the fish skin anti-oxidative peptide liquid. The preparation method disclosed by the invention, through a dual-enzyme digestion reaction system, greatly improves hydrolysis efficiency of fish skin protein and realizes full utilization of raw material; the process of in vitro simulation of gastrointestinal digestion is implemented in 37 DEG C water bath; an enzymolysis condition is mild and similar to a human body, and a digestion process of a human body can be better reflected.
Owner:JIANGSU UNIV
Method for directional production of singlet oxygen by activating persulfate via carbonylation carbon material
ActiveCN108083416AEfficient orientation generationReaction process greenWater treatment compoundsDiamondEnvironmental resistanceHazardous substance
The invention discloses a method for directional production of singlet oxygen by activating persulfate via a carbonylation carbon material, and relates to the method for directional production of singlet oxygen. For solving the technical problems that a photosensitizer used in a method for producing singlet oxygen is a toxic and harmful substance, is not conducive to subsequent separation and is accompanied by generation of other active oxygen species. The method comprises the steps: adding the carbonylation carbon material into to-be-treated sewage, stirring, then adding an aqueous solution of persulfate to obtain a mixed liquid, continuously stirring the mixed liquid, and thus producing the singlet oxygen for treating sewage. The new method is provided for high-efficiency and directionalproduction of the singlet oxygen, and meanwhile, the method is safe, economical and environmentally friendly, can be applied in the fields of biomedicine and water treatment, and has wide market prospects. The method is applied to the field of water treatment.
Owner:NANCHANG HANGKONG UNIVERSITY
Method for preparing dimethyl succinate
InactiveCN104878048AMeet operational requirementsReaction process greenOrganic compound preparationCarboxylic acid esters preparationChemical industryDisodium Succinate
The invention relates to a method for preparing dimethyl succinate. The method comprises the following steps: (1) preparing disodium succinate fermented liquid; (2) treating the disodium succinate fermented liquid; and (3) preparing dimethyl succinate by using a bipolar-membrane electrodialysis apparatus. The processes such as catalyst cleaning, regeneration, and the removal of a deactivated catalyst, and the like existing in the traditional preparation process are omitted; and the whole reaction process is green and clean, and completely conforms to the operating requirements of the modern chemical industry.
Owner:镇江博睿兴邦生物科技有限公司
Method for preparing fiber with thermal insulation function based on microfluidic technology
ActiveCN110016725AWith heat preservation functionAccurate quality controlMonocomponent protein artificial filamentFilament/thread formingFiberDevice form
The invention discloses a method for preparing fiber with a thermal insulation function based on the microfluidic technology. According to the method, a glass tube is used for preparing a microfluidiccontrol device, the device is composed of a cylindrical inner tube body and a square outer tube body, a phase change material is injected through the inner tube body, and a cross-linkable fiber solution is injected through the outer tube body. The phase change material in the microfluidic control device forms dispersed droplets under the shearing action of an external phase fiber solution, then the fiber solution is crosslinked and dried to obtain functional fiber with nodes, and the nodes are filled with the phase change material. When the temperature rises, the phase change material absorbsheat, when the temperature is reduced, the phase change material releases heat, and the thermal insulation function is achieved. The diameter of the fiber and the number and size of the nodes can beadjusted by changing the flow rates of the internal and external phases, the technology is simple in preparation process, and the prepared fiber can be used for heat preservation and energy storage and for cooling and heat dissipation and has broad application prospects.
Owner:绍兴钠钇光电有限公司
Catalyst and preparation method and application of catalyst
ActiveCN104226317AHigh activityGood choicePreparation by oxidation reactionsOrganic compound preparationGlutaric acidMetal alloy
The invention relates to an alloy catalyst and a preparation method and application of catalyst. The alloy catalyst is shown as the formula I, namely TM(100-x)-REX. The alloy catalyst can be used for carrying out catalytic oxidation on cyclohexane to directly generate adipic acid, glutaric acid, succinic acid and KA oil in the presence of oxidizing agents such as air, oxygen gas or oxygen-enriched air, and the main product is adipic acid; the appropriate reaction conditions are as follows: the temperature is 130-150 DEG C and the pressure is 1.0-3.0MPa. The alloy catalyst has the characteristics of good activity, long service life, easiness in separation and the like; the metal alloy catalyst is characterized by being used for carrying out catalytic oxidation on cyclohexane to generate adipic acid, glutaric acid and succinic acid in the presence of air by one step, the reaction process is green and has an energy-saving effect, and the greenhouse gas emission can be reduced.
Owner:CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
Catalyst for preparing pentanediol from biomass, and preparation method and application thereof
InactiveCN108620122ASimple processMild conditionsMolecular sieve catalystsOrganic compound preparationMolecular sieveBiomass
The invention relates to a supported platinum-cobalt catalyst and a preparation method thereof, and a method for producing pentanediol from biomass and biomass derivatives by using the supported catalyst. In the supported platinum-cobalt catalyst, different contents of platinum and cobalt are loaded on a carrier, and a weight ratio of platinum to cobalt is in a range of 1: 20 and 10: 1; and the carrier may be at least one selected from the group consisting of an acidic molecular sieve, activated carbon, ZrO2, Nb2O5 and Al2O3. The preparation method for catalyst is simple in process. The methodfor preparing pentanediol from biomass and the derivatives thereof by using the catalyst can realize high-selectivity preparation of 1,2-pentanediol or 1,5-pentanediol. Compared with traditional routes, the method provided by the invention has the obvious advantages of renewability of raw materials green, reaction process and the like, and has good application prospects.
Owner:HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
Diffusion and dialysis membrane for alkali recovery as well as preparation method and application of same
ActiveCN102908915AImprove stabilityWon't fall offSemi-permeable membranesDialysis membranesOrganic solvent
The invention discloses an organic-inorganic hybrid cation exchange membrane for alkali recovery in manners of diffusion and dialysis as well as a preparation method and an application of the membrane. The diffusion and dialysis membrane consists of an organic phase and an inorganic phase, wherein the organic phase is polyvinyl alcohol (PVA); the inorganic phase is a mixture of silanol and alkoxy silane; and the cation exchange membrane has a moisture content of 38-105 percent, an ion exchange capacity of 0.30-2.10 mmol / g, an alkali dialysis coefficient of 0.010-0.025 m / h and a separation factor of 11.3-33.5. The organic-inorganic hybrid cation exchange membrane as well as the preparation method and the application of the membrane has the beneficial effects that the silanol containing an ion exchange group is directly introduced, the ion exchange capacity is obtained, therefore, the reaction process is simple and controllable; as the whole reaction process is carried out in a water phase, and no organic solvent is required, the reaction process is green and environmentally-friendly; and the obtained hybrid cation exchange membrane has high mechanical strength and high thermal stability and can be applied to the field of alkali recovery.
Owner:UNIV OF SCI & TECH OF CHINA
Preparation method and application of activated biogas residue hydrothermal carbon
InactiveCN110371971ALarge specific surface areaSmall specific surface areaCarbon compoundsWaste based fuelBiogas productionFermentation system
The invention discloses a preparation method and application of activated biogas residue hydrothermal carbon. The activated biogas residue hydrothermal carbon serves as an additive and is added in theanaerobic fermentation process taking fecal residue and waste water as a fermentation substrate, biogas residue is recycled, and the biogas production efficiency in the anaerobic fermentation processis improved. The preparation method and application of the activated biogas residue hydrothermal carbon have the beneficial effects that the biogas residue is recycled and used for anaerobic fermentation engineering, material circulation is achieved, and meanwhile the high value utilization path of biogas residue is developed; the cost of the preparation method is low, the technology is simple, extra raw material purchasing is not needed, and in the preparation process, the condition is mild, energy consuming is small, and the cost is low; and in addition, the biogas production in the anaerobic fermentation system and the content of methane in the biogas can further be improved, thus the fermentation efficiency is high, the fermentation system is stable, and the problems that existing biogas residue is difficult to consume, and the anaerobic fermentation efficiency of the fecal residue and waste water is low are solved.
Owner:广东广垦畜牧工程研究院有限公司
Method for preparing alkane type biodiesel by using tung oil
InactiveCN103555362ASimple preparation processImprove responseBiofuelsLiquid carbonaceous fuelsAlkaneHydrogen
The invention relates to the field of renewable energy technology and environmental protection and particularly relates to a method for preparing alkane type biodiesel by using tung oil. The method comprises the following steps: utilizing a porous inorganic material as a carrier and preparing a catalyst through a stepwise impregnation method; introducing hydrogen to reduce and activate the catalyst; introducing gaseous tung oil to carry out a hydrocracking reaction with the hydrogen; and collecting the alkane type biodiesel generated after the hydrocracking reaction. The cetane number of the biodiesel prepared by the method provided by the invention is as high as 81-90 and is similar to that of a petroleum diesel component; the reaction process is environmental-friendly, thereby being suitable for industrial popularization and application; the preparation process is simple, the reaction procedures are simple and the conversion rate is higher than 85%; the highly unsaturated fatty acid of the tung oil limits the utilization of the tung oil serving as a biodiesel raw material, and a catalytic cracking method is adopted to carry out hydrogenation and cracking on the tung oil so that the tung oil is converted into high-quality biodiesel, thereby providing a foundation and reference for full use of tung oil resources.
Owner:BEIJING UNIV OF AGRI
Method for recovering carbon-fiber enhanced epoxy resin composite material
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
Preparation method of benzaldehyde
InactiveCN109761773ASeparation is direct and fastHigh purityPreparation by ozonolysisCarbonyl compound separation/purificationBenzaldehydeDistillation
The invention discloses a preparation method of benzaldehyde. The preparation method comprises the steps that cinnamyl aldehyde serves as raw materials, a mixed solution of 20.0 g of cinnamyl aldehydeand absolute ethyl alcohol is loaded into an ozonization reactor, the mass ratio of the cinnamyl aldehyde to the absolute ethyl alcohol is 1:4, 3.0wt% of CaO is added as a catalyst, 0.05-0.95 g of ozone is introduced into per gram of cinnamyl aldehyde per hour at the temperature of minus 10 DEG C, and the ozonization reaction is conducted for 0.5-12.0 hours; while the reaction is conducted, a reaction product is subjected to membrane filter dehydration in a dewatering device of an ozonization reacting device at the pressure of 0.001-1.0 MPa through one of a PVA organic membrane, a NaA-type zeolite molecular sieve membrane, a T-type zeolite molecular sieve membrane, and a CHA-type zeolite molecular sieve membrane, thus the reaction is conducted in the forward direction, the high benzaldehyde yield is obtained, the obtained product is subjected to molecular distillation treatment, and then the natural benzaldehyde with the purity reaching 85% or above can be obtained. The preparation method has the advantages that the process is novel, operation is easy, the reaction process is environmentally friendly, the natural degree of the benzaldehyde is good, and the obtained benzaldehyde ishigh in purity and yield.
Owner:GUANGXI UNIV
Preparation method of dimethyl ether
ActiveCN104387243AGood choiceHigh yieldEther preparation by compound dehydrationReaction rateReaction temperature
The invention discloses a preparation method of dimethyl ether. The preparation method comprises the following steps: mixing CO2 serving as raw material with H2, wherein the ratio of V(H2) / V(CO2) is 2-7; enabling the mixture to pass through a plasma-catalytic reactor of which the discharge spacing is 3-8cm, the voltage is 4-16kV and the frequency is 1-12kHz, wherein the plasma-catalytic reactor combines a plasma generating region and a catalyst storage region together and has a temperature control function; carrying out carbon dioxide hydrogenation reaction under the conditions that the reaction pressure is 1-5MPa, the reaction temperature is 200-280 DEG C and the reaction airspeed is 1000-5000h<-1>, wherein the main reaction product is dimethyl ether and the byproducts are carbon monoxide, methane, methyl alcohol and the like. The preparation method of dimethyl ether has the advantages of simple process, operation convenience, high reaction rate, high CO2 percent conversion and environment-friendly reaction process; the selectivity of dimethyl ether is high and the yield of dimethyl ether is high.
Owner:GUANGXI UNIV
Method for preparing ethyl pyruvate by oxidizing ethyl lactate with chlorine gas
InactiveCN101318902AMild reaction conditionsRapid responseOrganic compound preparationCarboxylic acid esters preparationEthyl esterOrganic matter
The invention relates to synthesis of an organic matter, in particular to a method for preparing ethyl pyruvate by utilizing chlorine to oxidize ethyl lactate. The ethyl lactate is taken as a raw material, and the ethyl lactate is oxidized into the ethyl pyruvate by the chlorine at a temperature of between 0 and 40 DEG C under catalysis of oxynitride and alkali; the amount of the oxynitride is 0.1 to 1.0 percent of the ethyl lactate; the amount of the chlorine is 1.0 and 1.2 times of the equivalent amount of the ethyl lactate; and the amount of the alkali is 1 and 1.2 times of the equivalent amount of the ethyl lactate. The method for preparing the ethyl pyruvate has the advantages of mild reaction conditions, rapid reaction, simple process, easy operation, easy separation, environment-friendly reaction process, and high atom economical efficiency; and the reaction oxidizes the ethyl lactate into the ethyl pyruvate by using the chlorine with low cost and easy acquisition.
Owner:YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
Biomass oxidative cracking catalyst based on modified H-Beta molecular sieve and preparation method and application thereof
ActiveCN113070096AIncrease the areaStrong ion exchangePreparation by oxidation reactionsMolecular sieve catalystsMolecular sievePtru catalyst
The invention discloses a biomass organic molecule oxidative cracking catalyst based on a modified H-Beta molecular sieve as well as a preparation method and application thereof. A metal component with better catalytic activity on ortho-diol is selected to be subjected to ion exchange with dealuminated H-Beta zeolite, so that the active component enters a framework of a dealuminated molecular sieve to serve as Lewis acid and an adsorption site in a reaction process, furthermore, the cracking activity and the reaction selectivity of the catalyst are effectively improved by utilizing the valence change of the metal ions and the synergistic effect of the metal ions and the H-Beta carrier, and the efficient and reusable catalyst meeting the ortho-diol C-C bond breakage is constructed. The prepared catalyst is used for the oxidative cracking reaction of phenyl glycol, the conversion rate of phenyl glycol is high, the yield of the oxidative cracking product reaches 95% or above, and the catalyst has unique advantages in the oxidative cracking reaction of biomass organic molecules.
Owner:XI AN JIAOTONG UNIV
Preparation method for converting organic carboxylic acid into organic aldehyde
InactiveCN101318885AMild reaction conditionsRapid responsePreparation by hydrogenolysisOrganic synthesisTrichloroisocyanuric acid
The invention relates to organic synthesis, in particular to a preparation method for converting an organic carboxylic acid to an organic aldehyde. The method comprises the steps that: two reactions are carried out in a reaction container to convert a carboxyl in a carboxylic acid to a boroxyl compound first and then to oxidize theboroxyl compound to an aldehyde by an acetone solution of a trichloroisocyanuric acid with a mass 1.0 to 1.2 times that of the reaction substrate of carboxylic acid at a temperature of between 0 and 40 DEG C in the presence of 0.1 to 1.0 percent of 2,2,6,6-tetramethylpiperidine-1-oxyl against the mass of the reaction substrate of carboxylic acid and a base with a mass 1.0 to 1.2 times that of the reaction substrate of carboxylic acid. The method for preparing the aldehyde from the organic carboxylic acid by one-pot reaction of the invention has the advantages of moderate reaction conditions, rapid reaction, green reaction due to use of nontoxic oxidizer, simple process, easy operation, easy handling, and contribution to the realization of industrialization.
Owner:YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
Method for preparing aldehyde/ketone by breaking C-C bond
ActiveCN113651681AImprove reaction efficiencyHigh reaction yieldOrganic compound preparationCarboxylic acid esters preparationOrganic solventAlcohol
The invention discloses a method for preparing aldehyde / ketone by breaking a C-C bond, which comprises the following step of: in an organic solvent system under an anaerobic condition, by taking alcohol as a reaction raw material, selectively breaking a C-C bond under the combined action of an iron catalyst, organic alkali and an additive to obtain aldehyde / ketone. According to the method, the alcohol and the iron catalyst are cheap and easy to obtain, the substrate range is wide, post-treatment is simple, the yield and purity of the product are high, a new synthesis route and method are developed for aldehyde and ketone compounds, and the method has good application potential and research value.
Owner:SUN YAT SEN UNIV
Method for generating singlet oxygen by activating hydrogen persulfate with hydroxyl-rich metal oxide
PendingCN110950306AEfficient orientation generationReaction process greenWater/sewage treatment by oxidationOxygen preparationPersulfateSinglet oxygen
The invention relates to a method for generating singlet oxygen by activating hydrogen persulfate with a hydroxyl-rich metal oxide. The method comprises the following steps: adding a hydroxyl-rich metal oxide and hydrogen persulfate into a solvent to obtain a mixed solution, and carrying out a stirring reaction process at 10-30 DEG C, wherein the mass concentration of the hydroxyl-rich metal oxidein the mixed solution is 0.1-2.0 g / L and the concentration of the hydrogen persulfate in the mixed solution is 0.20-5.00 mmol / L. According to the method, singlet oxygen is immediately generated at the beginning of reaction, no other reactive oxygen substance is generated in the whole reaction process, efficient and directional generation of the singlet oxygen is achieved, the activity of the singlet oxygen is not affected at all, pollutants can be efficiently degraded and the used activating agent is non-toxic and harmless.
Owner:SHANDONG UNIV
Controllable preparation method for silica-gel chromatographic filler
The invention discloses a controllable preparation method for silica-gel chromatographic filler. The method comprises the specific steps: adding an MIm (N-methylimidazole) functional monomer into silica gel (SiO2) and CPTMS (3-chloropropyl trimethoxy silane), carrying out a reaction for 12 to 48 hours at the temperature of 60 DEG C to 150 DEG C with stirring, then, carrying out washing sequentially by methanol and water, and carrying out drying, thereby obtaining N-methylimidazole modified silica-gel chromatographic filler, wherein the mass ratio of the silica gel to the CPTMS is 0.5: (0.02 to 0.5); the mass / volume ratio of the silica gel to the MIm functional monomer is (0.5 to 2.5)g: (10 to 50)mL. According to the method, the amount of bonding of the functional monomer is controlled through strictly controlling the charging rate of the silica gel to the silane reagent; meanwhile, the excessive added functional monomer is a reactant and is also a dispersant, so that additional organic solvent is not required to be added; the functional monomer can be reused, so that the requirements of green chemistry are fully met.
Owner:LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
A green and efficient synthesis method of copper-doped sba-15 mesoporous molecular sieve material
ActiveCN108285152BWon't happenReaction process greenCrystalline aluminosilicate zeolitesMolecular sieveUltraviolet lights
Owner:BAOJI UNIV OF ARTS & SCI
Preparation method of 6,6-dimethyl-3-oxadicyclo[3.1.0]hexane-2,4-diketone
The invention provides a preparation method of 6,6-dimethyl-3-oxadicyclo[3.1.0]hexane-2,4-diketone. The method comprises the following steps of: oxidizing first ethyl chrysanthemate serving as a raw material in water serving as a solvent by adopting potassium permanganate and adding sulfuric acid for hydrolyzing to generate 3,3-dimethyl-1,2-cyclopropane dicarboxylic acid; and performing cyclization on the 3,3-dimethyl-1,2-cyclopropane dicarboxylic acid in a system consisting of acetic anhydride and sodium acetate to generate the 6,6-dimethyl-3-oxadicyclo[3.1.0]hexane-2,4-diketone. The invention has the advantages that: water is taken as a reaction solvent, so that increase in cost and environmental pollution caused by the use of a large quantity of organic solvents are avoided; and a large amount of sulfur dioxide gas produced by the use of sodium metabisulfite is eliminated, so that environmental pollution and treatment of three wastes are greatly reduced. The method has the advantages of environmentally-friendly reaction process, low environmental pollution, simple process and low cost, thereby being beneficial to industrial production.
Owner:XIAN CAIJING OPTO ELECTRICAL SCI & TECH
Electrochemical preparation method for ethylene
ActiveCN110016687AReduce generationImprove responseElectrolysis componentsElectrolytic organic productionElectrolysisSolvent
The invention discloses an electrochemical preparation method for ethylene. The ethylene is obtained through carrying out electrolysis by taking inert electrodes as a working electrode and a counter electrode and taking a solution of succinic acid and an alkaline electrolyte in a protic or nonprotic solvent as an electrolyte. According to the method, the ethylene is prepared by adopting the electrochemical method for the first time, the succinic acid is a reproducible environment-friendly raw material, an aqueous solution system can be employed completely, and the obtained ethylene is separated naturally and is easy to collect and high in product purity.
Owner:TIANJIN UNIV
A kind of catalyst and its preparation method and application
ActiveCN104226317BHigh activityGood choicePreparation by oxidation reactionsOrganic compound preparationGlutaric acidPtru catalyst
Owner:CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
Preparation method for BiOBr nanorod, and applications
ActiveCN108940323AReduce usageReaction process greenWater/sewage treatment by irradiationWater treatment compoundsBarium nitrateHigh-speed grinding
The invention discloses a preparation method for a BiOBr nanorod. The preparation method includes the following steps: 1) weighing proper amount of barium nitrate pentahydrate and sodium bromide, grinding a mixture of the barium nitrate pentahydrate and sodium bromide in a mortar for some time, transferring the grinded mixture to a planetary ball mill to perform high speed grinding reaction, and taking an intermediate product out of a ball-milling jar after the reaction is performed for 2-3 min; 2) dispersing the intermediate product in deionized water to put into a hydrothermal reaction kettle to perform hydrothermal reaction; and 3) obtaining a final product through separating and washing after the reaction is finished.
Owner:王子韩
Cyclic peptide compound simulating structure of natural product and preparation method of cyclic peptide compound
ActiveCN110183513ARich 3D structureOvercome the disadvantages of category limitationsPeptide preparation methodsCyclic peptideNatural product
Owner:NANKAI UNIV
Pollution-free preparation method of periodic mesoporous organic silicon oxide material
ActiveCN109516470AReaction process greenSolve pollutionCrystalline aluminosilicate zeolitesMolecular-sieve compoundsAlkali freeCavitation
The invention belongs to the technical field of mesoporous materials, and particularly relates to a pollution-free preparation method of a periodic mesoporous organic silicon oxide material. In a Na2S2O8 solution, a unique micro-flow jet effect and a cavitation shock effect of ultrasonic waves are used to eliminate the non-uniformity of local concentration, to accelerate the generation of hydroxylfree radicals and to promote the hydrolysis of bridged organic silsesquioxane, then the solution is mixed with an organic template agent P123 and water soluble inorganic salt under ultrasound, and aself-assembling process between the organic template agent and an organic silicon source is promoted. The method is performed under an acid-free, alkali-free and heavy-metal-ion-free neutral condition, no acidic and alkaline waste solution containing the heavy metal ions is produced, and the reaction process is environmentally friendly and pollution-free; and the method has the advantages of highefficiency, mild reaction condition, convenient operation and the like, and facilitates the use in mass production.
Owner:HEZE UNIV
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