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1543 results about "Green chemistry" patented technology
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Green chemistry, also called sustainable chemistry, is an area of chemistry and chemical engineering focused on the designing of products and processes that minimize or eliminate the use and generation of hazardous substances. While environmental chemistry focuses on the effects of polluting chemicals on nature, green chemistry focuses on the environmental impact of chemistry, including reducing consumption of nonrenewable resources and technological approaches for preventing pollution.
Synthesis of colloidal nanocrystals
InactiveUS6872249B2High crystallinityGood monodispersityFrom gel stateMaterial nanotechnologyPresent methodSulfur
A method of synthesizing colloidal nanocrystals is disclosed using metal oxides or metal salts as a precursor. The metal oxides or metal salts are combined with a ligand and then heated in combination with a coordinating solvent. Upon heating, the metal oxides or salts are converted to stable soluble metal complexes. The metal complexes are formed by cationic species combining with the ligands and / or with the coordinating solvent. Finally, an elemental chalcogenic precursor, for example, Se, Te, or S, is introduced into the soluble metal complex to complete the formation of the nanocrystals at a controllable rate. High-quality CdSe, CdTe, and CdS nanocrystals are produced when CdO is used as the cadmium precursor. With the present method, the size, size distribution, and shape (dots or rods) of the resulting nanocrystals can be controlled during growth. For example, the resulting nanocrystals are nearly monodisperse without any size separation. Further, the method represents a major step towards a green chemistry approach for synthesizing high-quality semiconductor nanocrystals.
Owner:THE BOARD OF TRUSTEES OF THE UNIV OF ARKANSAS
Green synthesis of nanometals using plant extracts and use thereof
The present invention relates to methods of making and using and compositions of metal nanoparticles formed by green chemistry synthetic techniques. For example, the present invention relates to metal nanoparticles formed with solutions of plant extracts and use of these metal nanoparticles in removing contaminants from soil and groundwater and other contaminated sites. In some embodiments, the invention comprises methods of making and using compositions of metal nanoparticles formed using green chemistry techniques.
Owner:VERUTEK TECH +1
Method for the synthesis of acrylonitrile from glycerol
InactiveUS20100048850A1Less heat releaseIncrease partial pressureOrganic compound preparationPreparation by hydrocarbon ammoxidationGas phaseGlycerol
The invention relates to a novel way to synthesize acrylonitrile from a renewable raw material and more particularly relates to a method for producing acrylonitrile by the ammoxidation of glycerol in gaseous phase. The method can be implemented in a single step, or the glycerol can be previously submitted to a dehydration step. The acrylonitrile thus obtained meets the requirements of green chemistry.
Owner:ARKEMA FRANCE SA
Lignin-based porous carbon material and preparation method thereof
InactiveCN103253651AImprove adsorption capacityNo potential hazardCarbon preparation/purificationPorous carbonCarbonization
The invention discloses a lignin-based porous carbon material and a preparation method of the lignin-based porous carbon material. The aperture of the lignin-based porous carbon material is not larger than 300nm, the specific surface area is 628.3 to 762.5m<2> / g, and the pore volume is 0.16 to 0.23cm<3> / g. The preparation method comprises the following steps of: with biomass resource lignin as the initial raw material, pre-carbonizing at a low temperature to obtain a carbonized intermediate; and then quickly heating and carbonizing under the protection of inert atmosphere in a high-temperature furnace to obtain the lignin-based porous carbon material; and the lignin-based porous carbon material shows outstanding capacity of absorbing heavy metal ions in wastewater. According to the preparation method, the biomass resource is adopted and used as raw material, environmentally hazardous chemicals such as ZnCl2, strong acid and strong base are not used in the whole preparation process; the preparation method has low requirement to equipment, has the green chemical characteristics of environmental friendliness, low cost, outstanding performance, etc., is suitable for mass production, and is beneficial to treatment and control of metal-polluted wastewater and relief of pressure of papermaking black liquid to the environment.
Owner:GUANGXI UNIV
Bimetal nano rod of branched gold core/platinum shell structure and preparation method thereof
InactiveCN101450380AImprovement of poisoningLarge specific surface areaCoatingsPlatinumOptical property
The invention provides a dendritic gold-core / platinum-shell bimetal nanometer rod and a preparation method thereof. The dendritic gold-core / platinum-shell bimetal nanometer rod comprises a cylindrical gold nanometer-rod core and a porous platinum-shell layer covering the outer surface of the cylindrical gold nanometer-rod core; the diameter of the cylindrical gold nanometer-rod core is 10 to 15 nanometers; the length of the cylindrical gold nanometer-rod core is 55 to 60 nanometers; the thickness of the porous platinum-shell layer is 0.4 to 8 nanometers; and the length of platinum grains covering the outside of a nanometer rod is 2 to 4 nanometers. The preparation method provided by the invention has the advantages of simplicity, flexibility, environmental protection, green chemistry and low energy consumption. In addition, the obtained bimetal nanometer rod with a gold-core / platinum-shell structure has the characteristics of high yield, narrow size distribution, stable structure and adjustable optical properties.
Owner:THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
Method for preparing composite fiber material for visible light photocatalytic degradation of organic pollutants
InactiveCN101884917ASolving Recycling ProblemsReduce chance of recombinationWater/sewage treatment by irradiationDispersed particle separationTextile fiberCompound (substance)
The invention provides a composite fiber material applied to visible light photocatalytic purification of sewage and air pollutants and a preparation method thereof. The composite fiber material is synthesized by loading a visible light response type bismuth-based photocatalytic material on a textile fiber material through a green chemical synthetic route. A powdered photocatalyst is solidly loaded by the unique net-like felt structure of the textile fiber material, so that the catalyst is prevented from losing and agglomerating during sewage treatment and air purification, and the separability and reusability are improved.
Owner:于建强 +2
Nanoparticles for encapsulating polyphenol active substances and preparation method thereof
InactiveCN102924929AEasy to prepareMeet the requirements of green environmental protectionCross-linkMaillard reaction
The invention discloses nanoparticles for encapsulating polyphenol active substances and a preparation method thereof, which belong to the technical field of high-polymer chemisty and functional foods. In the method, protein-polysaccharide nanoparticles for encapsulating polyphenol active substances through a Maillard reaction of proteins and polysaccharides and self-assembly of polyphenol and a protein-covalence conjugate. The nanoparticles have excellent properties of high encapsulating efficiency on polyphenol active substances, high loading amount, high protection activity and the like. The nanoparticles are cross-linked by using crosslinking agents such as glutaraldehyde, genipin and the like, so that the stability and slow-release performance of the nanoparticles can be further improved. A preparation process is performed in a full-water-phase environment, organic reagents, surfactants and other toxic reagents are not used, and raw materials of a carrier belong to natural macromolecules, so that the nanoparticles have excellent biocompatibility and biodegradability, and are accordant with the requirement of green chemistry.
Owner:CENT SOUTH UNIV
Henna and vegetable dye based compositions for coloring of human hair
ActiveUS20100313362A1Increased free volumeUnique qualityCosmetic preparationsHair removalHair dyesHair Colors
New, effective and non-toxic compounded henna based hair dyes that are non-toxic, natural and hypoallergenic that provide an alternative to conventional hair color. The products are made using 100% Green Chemistry and do not utilize encapsulation.
Owner:VAINSHELBOIM ALEX +1
Preparation method of visible-light activated cuprous oxide/titanium dioxide nano-composite photocatalyst and applications thereof
InactiveCN101537354ASimple processLarge specific surface areaWater/sewage treatment by irradiationWater contaminantsPhotocatalytic degradationLight response
Owner:DALIAN UNIV OF TECH
Purification method of ion liquid
InactiveCN101003510AEfficient removalOrganic chemistryMolecular distillationPurification methodsDistillation
This invention discloses a method for purifying ionic liquid by molecular distillation. The method comprises: preheating crude ionic liquid, adding into a molecular distillation apparatus, adjusting the pressure, performing molecular distillation at an appropriate temperature, and collecting the heavy component to obtain purified ionic liquid. The method can efficiently remove residual volatile organic reactants, and the purity of purified ionic liquid is higher than 99%. Since the light component can be recovered for recycling, the method is thus environmentally friendly.
Owner:GUANGDONG UNIV OF TECH
Rapid tissue processing method and apparatus
InactiveUS7273720B1Easy to handleFacilitate resistive flow of electricityPreparing sample for investigationBiological testingMicrowaveTissue sample
A rapid tissue processing method and apparatus including the steps of fixation, dehydration, clearing, and impregnation. The preferred method is performed in a processing unit that employs alternating microwave and ohmic energy to heat the process solution and tissue sample. In one embodiment, the method employs environmentally friendly green chemicals to effectuate the processing.
Owner:BIRKNER JEFFREY C
Metal-organic framework nanocrystal loaded polyurethane foam as well as preparation and application thereof
ActiveCN106366636AGood dispersionOvercoming the defects of difficult processingCarboxylic acid nitrile preparationOrganic compound preparationChemical industryMetal-organic framework
The invention discloses a metal-organic framework nanocrystal loaded polyurethane foam as well as a preparation and an application thereof. Polyurethane prepolymer and active amino on MOFs (Metal-Organic Frameworks) are taken to perform chemical doping, the great challenge that MOFs materials are difficult to process is overcome, MOFs nanoparticles are uniformly loaded in the polyurethane foam, a foam reactor is obtained by means of in-situ forming, a new process of building a complex mesoporous-microporous assembly based on microporous metal-organic skeleton nanoparticles as structural units is provided to observe catalysis of the MOFs nanoparticles on knoevenagel condensation; as water serves as a foaming agent and a green chemical method is adopted to prepare an integral flow-by foam reactor to catalyze an organic reaction, aftertreatment of a catalyst is simplified, loss of the catalyst is avoided, continuous flow-by cyclic catalyzation can also be performed, and a new method is provided for the treatment of environmental pollution and chemical industry.
Owner:SHANDONG NORMAL UNIV
Preparation method of 1-(4-chlorophenyl)-3-hydroxypyrazole
The invention provides a preparation method of 1-(4-chlorophenyl)-3-hydroxypyrazole. P-chlorophenylhydrazine hydrochloride and acrylics are taken as raw materials and subjected to cyclization reaction and oxidation reaction with a one-pot method, so that 1-(4-chlorophenyl)-3-hydroxypyrazole is obtained. According to the method, 'one-pot method' reaction is realized, loss of transformed materials is avoided, the reaction period is shortened, the labor amount is reduced, the product quality is good, the yield is high, discharge of three wastes is reduced, the requirement of the green chemical technology is met, and the method has a good industrial application value.
Owner:JINGBO AGROCHEM TECH CO LTD
Method for preparing n-fatty acyl amino acid surfactant from oil
ActiveCN102266737ANo pollutionHandling is notTransportation and packagingMixingAcyl groupOrganic compound
The invention relates to a method for preparing an N-fatty acyl amino acid type surfactant by fat and belongs to the technical field of synthesis of organic compounds. In a technology for synthesizing the N-fatty acyl amino acid type surfactant, the fat replaces acyl chloride, so that the N-fatty acyl amino acid type surfactant can be synthesized; the fat and amino acid sodium react under a catalytic condition to generate N-fatty acyl amino acid sodium; therefore, the method has the advantages of high product surface activity, simple synthesis line, environment friendliness and the like; and the green chemistry rule can be met.
Owner:北京味食源食品科技有限责任公司
Polysaccharide-nano silver sol and preparation method thereof
The invention discloses polysaccharide-nano silver sol and a preparation method thereof. The polysaccharide-nano silver sol is carboxymethyl chitosan quaternary ammonium salt-nano silver sol; and the carboxymethyl chitosan quaternary ammonium salt-nano silver sol is prepared by converting AgNO3 into more active AgNO3, using carboxymethyl chitosan quaternary ammonium salt as a reducing agent and astabilizing agent and adopting a microwave radiation heating method. The carboxymethyl chitosan quaternary ammonium salt is used as the reducing agent and the stabilizing agent for the first time, and the carboxymethyl chitosan quaternary ammonium salt-nano silver sol is quickly prepared in an aqueous phase under normal pressure by adopting the efficient microwave radiation heating method, so that the preparation process accords with 'green chemistry' advocated 'greenness' and 'environment friendliness' of reaction reagents, reducing agents and stabilizing agents in nano particle preparation;and because of the green preparation process and unique structure and properties of the carboxymethyl chitosan quaternary ammonium salt, the carboxymethyl chitosan quaternary ammonium salt-nano silver sol has huge application prospect in the fields of biology, medical treatment and the like.
Owner:SOUTH CHINA UNIV OF TECH
Preparation method of [Beta]-Ga2O3 nano array
ActiveCN107180882ASimple and cheap preparation methodFor different applicationsMaterial nanotechnologySemiconductor devicesWater bathsNanometre
The present invention discloses a preparation method of a [Beta]-Ga2O3 nano array. The method comprises: employing a water bath method to prepare a GaOOH seed layer, employing a hydro-thermal method to prepare a GaOOH nano array on the seed layer, and finally obtaining a [Beta]-Ga2O3 nano array through thermal annealing. The preparation method of the [Beta]-Ga2O3 nano array is a green chemistry method and employs the chemical method seed layer and the nano array, the array is neatly arranged, the dimension is uniform, the preparation method is simple and low in cost and easy to popularize so as to facilitate large-scale preparation, the GaOOH seed layer is prepared, and a substrate is not limited and can be quartz, silicon, a transparent conductive substrate (ITO or FTO), sapphire (C-AL2O3) and the like so as to facilitate different applications.
![Preparation method of [Beta]-Ga2O3 nano array](https://images-eureka-patsnap-com.libproxy1.nus.edu.sg/patent_img/bc2713aa-0060-4f1a-90f2-f1302b04b035/170523152311.png "Preparation method of [Beta]-Ga2O3 nano array")
![Preparation method of [Beta]-Ga2O3 nano array](https://images-eureka-patsnap-com.libproxy1.nus.edu.sg/patent_img/bc2713aa-0060-4f1a-90f2-f1302b04b035/170523152318.png "Preparation method of [Beta]-Ga2O3 nano array")
![Preparation method of [Beta]-Ga2O3 nano array](https://images-eureka-patsnap-com.libproxy1.nus.edu.sg/patent_img/bc2713aa-0060-4f1a-90f2-f1302b04b035/170523152322.png "Preparation method of [Beta]-Ga2O3 nano array")
Owner:HARBIN INST OF TECH
Electrochemical method of oil removal of wastewater produced in oil extraction by polymer flooding displacement
InactiveCN101602531AEasy to separateSave construction investmentWater/sewage treatment by flotationElectrolysisWater quality
The invention discloses an electrochemical method of oil removal by polymer flooding oil recovery wastewater, which comprises the following steps of: 1, electrolysis; 2, sedimentation. In the process of the electrolysis, tiny oil droplets in the wastewater lose electrons due to discharge on the surface of an anode, charges on the surface of the oil droplets are reduced, and electric potential of interface xi is decreased; and residual polymer pieces in the wastewater after the electrolysis are oxidized and degraded, viscosity of the wastewater is decreased, and water film intensity on the interface of oil / water is reduced. Therefore, the tiny oil droplets after the electrolysis are liable to be converged into large oil droplets and are rapidly separated from the wastewater under the action of cathode hydrogen. As treated by the method, crude oil in wastewater produced in oil extraction by polymer flooding displacement is quite easy for removal with no need for large use of sedimentation tanks, thus saving construction fund for oilfield; the invention has simple process, requires no drug, saves resource and cost and conforms to green chemistry process, quality of the wastewater after the oil removal is obviously crystal-clear; in addition, the device is convenient and safe in operation, easy to control and realize automation, extensively adapted to the amount of water, and convenient for popularization and application.
Owner:SOUTH CHINA UNIV OF TECH
Rapid tissue processing method and apparatus
InactiveUS7273587B1Easy to handleFacilitate resistive flow of electricityLayered productsPreparing sample for investigationMicrowaveCompound (substance)
A rapid tissue processing method and apparatus including the steps of fixation, dehydration, clearing, and impregnation. The preferred method is performed in a processing unit that employs alternating microwave and ohmic energy to heat the process solution and tissue sample. In one embodiment, the method employs environmentally friendly green chemicals to effectuate the processing.
Owner:BIRKNER JEFFREY C
Preparation method for forming metal organic framework ZIF-67 film by utilizing cobalt nano array layer conversion
ActiveCN105233702ASolve the difficulty of heterogeneous nucleationSolve associativitySemi-permeable membranesMetal-organic frameworkSolvent
The invention relates to a preparation method for forming a metal organic framework ZIF-67 film. Through hydrothermal synthesis, first a cobalt nano array layer firmly combined with a carrier is introduced to the carrier, and the carrier with the cobalt nano array layer is obtained; in the aftertreatment process, the cobalt nano array layer provides a metal source for growth of the ZIF-67 film and serves as a growing point and bonding point for forming the film, the continuous and uniform ZIF-67 film is formed by growth. According to the method, the problems that the metal organic framework film has difficulty in heterogeneous nucleation, is weak in binding force with the carrier and is easily subjected to embrittlement are solved. In the cobalt nano array growth process or in the ligand growth process, only water is used as a solvent, and no other organic solvent participates. The environmental pollution is small, and the preparation method conforms to the green chemical development requirements. In the film forming process, the cobalt nano array layer has dual functions of providing a metal cobalt source and enhancing binding force between the carrier and the ZIF-67 film.
Owner:DALIAN UNIV OF TECH
Efficient ultra-precise shear thickening and chemical synergy polishing method
ActiveCN108555698AImprove processing efficiencyHigh precisionLapping machinesGrinding work supportsPhysical chemistryGreen chemistry
Owner:HUNAN UNIV OF SCI & TECH
Method for separating out and purifying epoxypropane and methyl alcohol
ActiveCN102093316AReduce the temperatureReduce generationOrganic compound preparationHydroxy compound preparationAlcoholHigh pressure
The invention discloses a method for separating out and purifying epoxypropane and methyl alcohol. The method comprises the following steps: 1) rectifying washing mother liquor which contains the epoxypropane and methyl alcohol and is used for producing aliphatic polycarbonate in a first rectifying tower so as to obtain tower top material containing crude epoxypropane from the tower top of the first rectifying tower and obtain the methyl alcohol from a tower plate at the tower kettle side line of the first rectifying tower; and 2) rectifying the tower top material containing the crude epoxypropane in a second rectifying tower so as to obtain the epoxypropane from the tower plate of the tower kettle or tower kettle side line of the second rectifying tower. In the invention, a double-tower efficient rectification mode is adopted, namely, vacuum or normal pressure rectification is used in the first tower, and high pressure rectification is used in the second tower, thereby extremely effectively separating out two target substances epoxypropane and methyl alcohol, obtaining high-purity epoxypropane and methyl alcohol materials, reducing by-products and fully utilizing material energy,and the industrial process reaches the requirement of green chemistry.
Owner:CHINA NAT OFFSHORE OIL CORP +2
Green and quick method for preparing lignin-nanosilver sol
The invention discloses a green and quick method for preparing lignin-nanosilver sol. The nanosilver sol is obtained by reacting lignin serving as a reducer and stabilizer with ammoniacal silver nitrate under the condition of microwave radiation. The preparation method comprises the following steps of obtaining [Ag(NH3)2] <+> through coactions of AgNO3, NaOH and ammonia water; reacting the [Ag(NH3)2]<+> with the lignin under the condition of microwave radiation to obtain the nanosilver sol. The concentration and the particle size of the nanosilver are controlled by adjusting the temperature and time for microwave reaction and a ratio of the lignin to the AgNO3, and the obtained nanosilver can be wrapped by the lignin, and is uniformly dispersed and difficultly agglomerated. The preparation method accords with the concept of 'green chemistry'. The method provides a technology orientation for utilizing forestry and agricultural residues at high values, and provides a new way for compounding nanocrystalline metal. Meanwhile, the nanosilver has a great application prospect in the fields of medical treatment and biology.
Owner:SOUTH CHINA UNIV OF TECH
Method for preparing hemicellulose/nano-silver colloid rapidly
The invention discloses a method for preparing a hemicellulose / nano-silver colloid rapidly. The method includes the steps that in a water phase, hemicellulose and silver ammonia solution are subjected to a redox reaction under the microwave condition to generate nano-silver particles; the hemicellulose is extracted from the grass family, the weight-average molecular weight of the hemicellulose is 4.5*104 g / mol-5.5*104 g / mol, and the hemicellulose comprises, by mass percent, the following carbohydrate components: 85-90% of wood sugar, 7.5-12% of arabinose, 0.5-1% of glucose, 0.15-0.65% of galactose, 0.08-0.15% of mannose and 1.05-2.95% of glucuronic acid. The preparation meets the requirement for green chemistry, and the method is a nano-metal preparing method which is green and rapid to implement. A new conception is provided for the green synthesis of nano-silver, the hemicellulose resource is reasonably utilized, and the nano-silver colloid has application prospects in the biological field and the medical field.
Owner:SOUTH CHINA UNIV OF TECH
Preparation method of Ru-Pd bimetal-supported TiO2 nanotube photocatalyst and application thereof
InactiveCN102658130ASimple processLarge specific surface areaWater/sewage treatment by irradiationWater contaminantsHydrofluoric acidTio2 nanotube
The invention discloses a preparation method of a Ru-Pd / TiO2 nanotube complex photocatalyst and the application thereof, and belongs to the technical field of environment pollution control. When the photocatalyst is prepared, an electrochemical oxidation reaction is performed under the action of hydrofluoric acid with the concentration of 0.2wt percent so as to prepare a TiO2 nanotube electrode firstly, the pipe diameter of a nanotube is about 100 nm, and the thickness of a pipe wall is about 20 nm. Then an impregnating electrodeposition method is adopted to prepare the Ru-Pd / TiO2 nano complex photocatalyst. The method for preparing the complex photocatalyst has the advantages of simple synthesis, stable property, synthesis process belonging to the green chemistry and the like. The composition of Ru and Pd improves the separating efficiency of photoinduced electrons-hole pairs of the TiO2 nanotube electrode, further improves the photocatalytic reduction degradation efficiency of organic pollutants, and has very high utility value and a good application prospect.
Owner:DALIAN UNIV OF TECH
A green synthesis method for carbon quantum dot bonded silica gel chromatography filler
InactiveCN106268715AEnhanced bondingHigh bonding capacityIon-exchange process apparatusComponent separationEpoxySynthesis methods
This invention has discloses a green synthesis method for carbon quantum dot bonded silica gel chromatography filler, which comprises the concrete steps of: mixing the solid powder of aconitic acid and tryptophan to be ground evenly, letting the mixture react under the temperature of 180oC- 200oC for 3 - 6 hours. Through dissolution, centrifugation and freeze drying of the generated solid, the amino-functionalized carbon quantum dots (NCDs) are obtained; After that, NCDs are dispersed in DES and added with gamma-glycidoxypropyl trimethoxy siloxane(GPTMS). Under the protection of N2 and the temperature of 55oC- 65oC, the mixture is stirred to react for 22 - 25 hours, then the silica gel (SiO2) is added to react for another 12 - 48 hours. Water and absolute ethyl alcohol are alternatively used to wash the raw product generated from the reaction. Silica gel chromatography filler modified by carbon quantum dots will be generated after drying. This green synthesis method realizes the surface bond of carbon quantum dots and silica gel through epoxy group and amino. DES used in the process of reaction is reaction solvent, which serves as an excellent dispersing agent for carbon quantum dots and silica gel, ensures higher bonded amount, and at the same time, meets the requirements of green chemistry.
Owner:LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Platinum-nickel-cobalt alloy@carbon nanotube composite material, preparation and application thereof
ActiveCN110783577AEasy to prepareLow costMaterial nanotechnologyCell electrodesPtru catalystMetal-organic framework
The invention belongs to the field of preparation of electro-catalytic materials, and more particularly relates to a nickel-cobalt alloy@carbon nanotube composite material and preparation and application thereof. A precursor solution containing platinum, nickel and cobalt is mixed with a metal organic ligand solution, coordination reaction is carried out, solid-liquid separation is carried out after the reaction is finished to obtain a metal organic framework containing platinum, nickel and cobalt, washing and drying are carried out to obtain a dried metal organic framework; and the obtained metal organic framework is annealed in a reducing atmosphere, cleaning with dilute acid is carried out, separating and drying are carried out to obtain the platinum-nickel-cobalt alloy@carbon nanotubecomposite material. The composite material is used as a catalyst for an electrocatalytic oxygen reduction test, and is prepared into a full cell for a fuel cell test system, and the obtained catalyticperformance and stability are superior to those of the current commercial platinum-carbon catalyst. The preparation method of the material is simple, reaction conditions are mild, cost is low, the concept of green chemistry is met, and large-scale industrial production can be carried out through synthesis of the adopted in-situ organic framework.
Owner:HUAZHONG UNIV OF SCI & TECH
Method for producing important steroid hormone dexamethasone methyl tetraenes intermediate
The invention discloses a method for producing an important steroid hormone dexamethasone methyl tetraenes (5ST) intermediate, which comprises the following steps of: dissolving a methyl dehydrate into an organic solvent, adding a reducing agent into the solution at the temperature of between 5 DEG C below zero and 20 DEG C, and performing one-step reaction to obtain methyl tetraenes with less than 0.8 percent of single impurity, wherein the reducing agent is a mixed reducing agent of 1 to 15 weight parts of chromium trichloride and 0.2 to 8 weight parts of zinc powder. The method for producing the 5ST shortens the reduction reaction into one-step reaction from three-step reaction so as to save the reaction time and facilitate the operation. The method reduces the consumption of chemical raw materials and dangerous goods, reduces the environmental pollution, and reflects the environment-friendly idea of green chemistry.
Owner:TIANJIN JINHUI PHARMA
Method for preparing polyaniline/ferroferric oxide electromagnetic composite material
InactiveCN103613760AImprove conductivityImprove magnetic propertiesIn situ polymerizationPhysical chemistry
The invention discloses a method for preparing a polyaniline / ferroferric oxide electromagnetic composite material. The method comprises the following steps: firstly, synthesizing a ferroferric oxide nano material in an ionic liquid, then, mixing aniline monomer and a doping agent with deionized water, uniformly mixing the components, slowly dropwise adding an oxidant solution into the mixed solution, and reacting to obtain polyaniline / ferroferric oxide black green electromagnetic composite material powder. In the preparation method, ferroferric oxide ferrofluid is synthesized by a chemical coprecipitation method, the electromagnetic composite material is synthesized by an in situ polymerization method, the synthesis process is simple and easy to operate, the ionic liquid is used as a green chemical solvent to be applied in the whole synthesis process, and the magnetism and electrical conductivity of the synthesized electromagnetic composite material are good, so that the electromagnetic composite material can be applied in such fields as electromagnetic shielding, microwave absorption, stealth coating and the like.
Owner:LANZHOU UNIVERSITY OF TECHNOLOGY
Chiral ionic liquid and its preparing method
InactiveCN1749249ALarge structural diversity and designabilitySimple processGroup 5/15 element organic compoundsHalogenIon
The present invention is chiral ionic liquid and its preparation process, and features that inside solvent capable of dissolving ionic liquid and incapable of dissolving haloid generated in the double decomposition reaction, chiral lactate and ionic liquid with halogen ion as anion react to obtain chiral ionic liquid with structural general expression [C]+[A]- and comprising cation [C]+ and chiral lactate radical anion [A]-. Compared with available technology, the present invention has the advantages of simple preparation process and easy realization, and the prepared chiral ionic liquid has the advantages of ionic liquid being non-volatile, non-toxic, wide liquid state temperature range, etc. and the advantages of chiral matter with high selectivity, chrial induction effect, etc. and is expected to be used as chiral catalyst, chiral solvent and other green chemical material.
Owner:ZHEJIANG UNIV
Preparation method and application of PVDF/UiO-66-NH2 imprinted composite membrane
ActiveCN110711499AIncrease roughnessLow priceMembranesSemi-permeable membranesNanoparticleOil water emulsion
The invention belongs to the field of environmental functional materials, and particularly relates to a preparation method and an application of a PVDF / UiO-66-NH2 imprinted composite membrane. According to the preparation method, UiO-66-NH2 nanoparticles are modified to the surface of the PVDF membrane through a delayed phase inversion one-step method by utilizing the viscosity of PVDF, so that the roughness of the surface of the PVDF membrane is improved, and the problems that blending is easy to embed, the surface modification process is complex and the like are solved. The wettability and the molecular imprinting membrane technology are combined for the first time, so that the prepared PVDF / UiO-66-NH2 imprinting composite membrane has super-hydrophilicity / underwater super-oleophobicity,can effectively separate / adsorb antibiotics in emulsion, synergistically and selectively adsorb / separate antibiotics and separate oil-water emulsion, and has excellent anti-pollution performance. ThePVDF material used in the preparation method is low in price, the preparation method is simple, easy to control, low in energy consumption and free of secondary pollution, accords with the concept ofgreen chemistry, can be produced on a large scale and can be applied to the field of separation of antibiotics in emulsion.
Owner:JIANGSU UNIV
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