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33results about How to "High response controllability" patented technology
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Preparation method of shape memory polyurethane based on lactide and 1, 4-p-dioxanone
The invention discloses a preparation method of shape memory polyurethane based on lactide and 1, 4-p-dioxanone. The preparation method comprises the following steps of: firstly carrying out vacuum melting reaction on the 1, 4-p-dioxanone, stannous octoate and small molecule diol to generate hydroxyl-terminated polybutadiene (1, 4-p-dioxanone), carrying out vacuum melting reaction on the hydroxyl-terminated polybutadiene and the lactide as well as the stannous octoate to prepare the hydroxyl-terminated polybutadiene (lactide-co-1, 4-p-dioxanone), then reacting the hydroxyl-terminated polybutadiene with diisocyanate as well as the stannous octoate in a benzene solvent to generate prepolymer, and then reacting the prepolymer with an isopropyl alcohol solution of chain extender small molecule diol or small molecule diamine to prepare shape memory polyurethane. The invention adopts a tow-step method to prepare hydroxyl-terminated polybutadiene (lactide-co-1, 4-p-dioxanone), takes the benzene solvent as a pre-polymerization reaction solvent, introduces isopropanol as a cosolvent in the chain extension reaction, and can enhance reaction controllability, reduce by-product production, enhance product yield and obtain high molecular weight chain-shaped shape memory polyurethane with excellent shape memory performance.
Owner:CHONGQING UNIV
Composite edible gel material capable of forming into thermal irreversible gel by means of thermal melting and preparation method thereof
ActiveCN102150767AHigh response controllabilityKeep the flavorFood preparationPhosphateCalcium alginate
The invention provides a composite edible gel material capable of forming into a thermal irreversible gel by means of thermal melting. The composite edible gel material comprises the components in weight percent: 10-60% of microcapsule particles, 2%-20% of retarder and 30%-70% of alginate. The invention further provides a preparation method of the composite edible gel material capable of forming the thermal irreversible gel by means of thermal melting. The preparation method of the composite edible gel material comprises the step of mixing the microcapsule particles, the alginate with the phosphate according to a certain proportion. The composite edible gel material is added into the water to be heated up to the dissolving temperature of the microcapsule wall material, the packed gel agent is released out of the microcapsule particles, the packed gel agent is reacted with the alginate under the delayed coagulation of the phosphate to form the irreversible calcium alginate gel, and thecalcium alginate gel can not be melted only according to the heat change, so that the special flavor and the quality structure of the hot food can be kept; and the gel forming time can be controlled according to the practical situation in the specific production process, so that the requirement of the production operation can be met.
Owner:QINGDAO BRIGHT MOON SEAWEED BIO HEALTH TECH GRP CO LTD
Synthesis method of ruthenium carbene catalyst
PendingCN111468191AMild reaction conditionsHigh response controllabilityOrganic-compounds/hydrides/coordination-complexes catalystsPtru catalystCarbene
The invention relates to a synthesis method of a ruthenium carbene catalyst, which comprises the following steps: (1) adding benzyl halide and triphenylphosphine into a reactor, reacting in a medium,and reacting the obtained reaction product under the action of a strong alkali to obtain a first intermediate product; (2) reacting the first intermediate product with triphenylphosphine ruthenium chloride in a solvent, replacing triphenylphosphine with tricyclohexylphosphine, filtering and washing to obtain a ruthenium carbene complex precursor; and (3) carrying out a complex addition reaction onthe ruthenium carbene complex precursor and a functional ligand to obtain the target product that is the ruthenium carbene catalyst. Compared with the prior art, the method has the characteristics ofcapability of efficiently controlling the reaction speed, short preparation period, simplicity in operation, stable process, environmental friendliness, good atom economy and the like, and has a relatively great application prospect in the aspect of industrial amplification.
Owner:SHANGHAI RES INST OF CHEM IND
New preparation method of O-methyl isourea methyl sulfate
ActiveCN108047094AHigh purityShort reaction timeUrea derivatives preparationOrganic compound preparationThermal insulationSulphate Ion
The invention discloses a new preparation method of O-methyl isourea methyl sulfate. The method includes the following steps that a certain amount of dimethyl sulphate is added in a 500-mL three-mouthreaction bottle, quantitative urea is added in batches, after reaction liquid is clear, a thermal insulation reaction is conducted for a certain time, and the product, namely O-methyl isourea methylsulfate, is obtained. Urea and dimethyl sulphate are adopted as raw materials for the reaction under the microwave effect to prepare O-methyl isourea methyl sulfate. The method has the advantages thatthe reaction can smoothly occur at the low temperature at which a conventional method is difficult to conduct, the reaction time is largely shortened, and the reaction efficiency and the product purity are improved; the temperature is controlled to be 45-70 DEG C, reduction of the reaction temperature not only can reduce the safety risk, but also can reduce side reactions in the production process, and the product yield is thus increased to 80%.
Owner:HUBEI YUANDA FUCHI PHARMA CHEM
Method for preparing titanium nitride nano film on substrate surface, substrate with film and application thereof
ActiveCN108546929AHigh response controllabilityLower secondary electron emission coefficientChemical vapor deposition coatingNanometreSecondary electrons
The invention provides a method for preparing a titanium nitride nano film on a substrate surface, a substrate with the film and application thereof, and belongs to the technical field of secondary electron emission suppression. The method comprises the following steps: transferring a substrate to a reaction chamber through a pre-vacuum chamber, and vacuuming the reaction chamber; introducing an inert gas into the reaction chamber, annealing the substrate; returning the annealed substrate to the pre-vacuum chamber, and using an ammonia gas plasma and a gaseous titanium source for a plurality of gas washing cycles of the reaction chamber; sending the substrate back to the reaction chamber, maintaining the temperature of the reaction chamber at 150 to 220 DEG C, and using the ammonia gas plasma and the gaseous titanium source for plasma enhanced titanium nitride atomic layer deposition reaction to obtain the substrate with the titanium nitride nano film. The ultrathin film prepared by the method has strong controllability, bonding strength between the film and the substrate is high, surface conformality is good, and surface uniformity in complex structures such as plane and porous structures is high.
Owner:XIAN INSTITUE OF SPACE RADIO TECH
Side chain type homogeneous anion exchange membrane and preparation method thereof
ActiveCN108479436AImprove conductivityGood chemical stabilityMembranesSemi-permeable membranesAlkaneFunctional monomer
The invention discloses a side chain type homogeneous anion exchange membrane and a preparation method thereof. A structural formula of the side chain type homogeneous anion exchange membrane is as shown in the description. The preparation method is characterized by firstly preparing an alkaline functional monomer containing a benzyl bromide group by utilizing a dibromo alkane compound and an alkaline functional reagent, and then enabling the alkaline functional monomer to react with an amino-containing polypropylene phosphine oxide compound, thus obtaining the side chain type homogeneous anion exchange membrane. The side chain type homogeneous anion exchange membrane prepared by the invention has the characteristics of controllable structure, high ion exchange capacity, high conductivity,good chemical stability and the like, and can meet the demands of different application fields.
Owner:HEFEI UNIV OF TECH
Method for preparing heteroatom-doped carbon material at room temperature
The invention relates to a method for preparing a heteroatom-doped carbon material at a room temperature. The method comprises the following steps: mixing a halogenated macromolecule and strong base with a strong polar solvent so as to obtain a mixture, grinding the mixture at the room temperature, and directly cleaning and drying after completion of grinding, so as to obtain the heteroatom-doped carbon material, wherein the halogenated macromolecule is polyvinylidene difluoride, polyvinylidene chloride or polyvinyl chloride, the strong base is alkali (earth) metal hydroxide, alkali (earth) metal alkoxide, alkali (earth) metal sulfide, alkali (earth) metal amides or alkali (earth) metal nitride, the strong polar solvent is N,N-dimethylformamide, N,N-dimethylacetamide, dimethyl sulfoxide or nitrogen methyl pyrrolidone and the room temperature refers to 10-40 DEG C. According to the method, the raw materials are cheap and easy to obtain, the operation is simple, safety is high and the method is very suitable for industrial expanded production.
Owner:BEIJING UNIV OF CHEM TECH
A kind of grafted antibacterial polypropylene and its preparation process
The invention relates to a novel grafted antibacterial polypropylene, which is mainly obtained by grafting polypropylene and maleic anhydride to obtain an intermediate, which is then prepared by nucleophilic reaction with a brominated organic antibacterial agent; wherein the organic antibacterial agent molecule contains a or multiple -N-S bonds, one or more C=C bonds, one or more ring structures. The novel grafted antibacterial polypropylene of the present invention can be used alone as an antibacterial PP material, or can be blended with polypropylene as an antibacterial additive masterbatch, or multi-layer co-extruded with PP to greatly improve the antibacterial performance of the PP surface. The new grafted antibacterial polypropylene of the present invention has good adhesion to substrate PP, good antibacterial performance durability, excellent mechanical properties, and good high temperature stability. Due to the small amount of addition, it does not affect the mechanical properties of the base material, which solves the problem of the existing production process. There are problems such as poor antibacterial performance of PP products, easy precipitation and loss of antibacterial agents, and short antibacterial cycle. Moreover, the preparation process is simple, the cost is low, and the method has huge market application prospects and market value.
Owner:汕头市远生实业有限公司
Synthesis process of novel silicon paste with high defoaming performance
PendingCN113491885AShorten the timeSimple processFoam dispersion/preventionHydrogen contentHydrosilylation
The present invention discloses a synthesis process of a novel silicon paste with high defoaming performance, and particularly relates to the technical field of defoaming agents, the novel silicon paste comprises the following raw materials by weight: 350-400 parts of silicone oil, 150-200 parts of hydrogen-containing silicone oil (the hydrogen content is 0.18%), 100-150 parts of vinyl silicone oil (the vinyl content is 0.8%), 50-70 parts of MQ resin, 20-40 parts of white carbon black, 0.02-0.06 part of a chloroplatinic acid-isopropanol solution (0.3 wt%), and 20-30 parts of a post-treatment agent Cat.2. The methyl silicone oil is used as a reaction dispersing agent and a defoaming component by combining hydrosilylation reaction, and meanwhile, the MQ resin and the white carbon black are introduced as a reinforcing agent and a defoaming active component, so that on one hand, the white carbon black has the effect of reducing the reaction activity to enable the cross-linking reaction to be controllable, and on the other hand, the silicon paste process is combined, and the time of the silicon paste preparation process is greatly shortened; and the high-performance silicon paste with simple process and high efficiency is obtained.
Owner:福建省西斯特环保材料科技有限责任公司
Preparation method of key intermediate of JAK3 enzyme inhibitor
PendingCN113121413AAvoid separationRaw materials are cheap and easy to getOrganic chemistry methodsBulk chemical productionTrifluoroacetic acidCombinatorial chemistry
The invention relates to a preparation method of a key intermediate ((3R,6S)-1-benzyl-6-methyl piperidine-3-amine) of a JAK3 enzyme inhibitor, and particularly relates to a method for preparing the required intermediate by taking 6-methyl piperidine-3-amine as an initial raw material through Boc protection, catalytic hydrogenation, benzyl protection, trifluoroacetic acid Boc de-protection, salt forming and splitting, and dissociation. The salt forming and splitting method comprises the following steps: mixing a racemic mixture containing a compound enantiomer with a structure shown in the formula with a splitting reagent with definite stereo-specificity in a solvent to form a solution, wherein the splitting agent is capable of binding at least one but not all of said enantiomers to form a precipitate containing the at least one the stereo-specific form of enantiomers; and collecting and purifying the precipitate , or collecting a solution containing other enantiomers and recrystallizing the enantiomers contained in the solution. The preparation method has the advantages of cheap and easily available raw materials, mild reaction conditions, high reaction controllability and good industrial application prospect.
Owner:JIANGSU ALICORN PHARMATECH CO LTD
Dual-signal amplification probe, sensor, detection method and application
ActiveCN112210588AStrong linear responseGood linear responseMicrobiological testing/measurementAgainst vector-borne diseasesSingle strandSignal amplification
The invention belongs to the field of biochemical analysis and detection, and particularly relates to a dual-signal amplification probe, a sensor, a detection method and application. The dual-signal amplification probe comprises an aptamer probe, wherein the aptamer probe is formed by self-assembling at least three single-stranded sequences, a sequence S1 comprises a sequence ST complementary to an aptamer sequence S3 and a first binding sequence, a sequence S2 comprises a sequence ST complementary to the aptamer sequence S3 and a complementary sequence of the first binding sequence, and the sequences include the aptamer sequence S3; and a hairpin probe, wherein the hairpin probe comprises a second binding sequence, a G-quadruplex sequence and a sequence ST* which can be partially complementary to the sequence ST, the second binding sequence is partially complementary to the G-quadruplex sequence, when the second binding sequence and a sequence ST' are partially complementary, a protruding tail end is formed at the 3' end of the sequence ST', and when the sequence ST* and the sequence ST are complementary, a flat tail end is formed at the 3' end of the sequence ST*. The dual-signalamplification probe adopts an exonuclease-assisted signal amplification method to detect a target, and is excellent in system stability, high in detection sensitivity and strong in specificity.
Owner:JIANGSU INST OF NUCLEAR MEDICINE
Production method for preparing high-boiling silicone oil by alcoholysis of organosilicon high-boiling components
Owner:TANGSHAN SANYOU SILICON IND
A kind of preparation method of doped carbon material for supercapacitor
ActiveCN104900423BLow costWide variety of sourcesHybrid capacitor electrodesHybrid/EDL manufactureAlkaline earth metalN dimethylformamide
The invention relates to a preparing method for a doped carbon material of a super-capacitor, which comprises the following steps: mixing polyvinylidene chloride, strong base and strong polar solvent for obtaining a mixture; then grinding the mixture; after grinding, calcining the ground mixture in an inert gas; and then performing cleaning and drying for obtaining the doped carbon material. The strong base is alkaline-earth metal hydroxide, alkaline-earth metal oxide, zinc oxide, alkaline-earth metal amide, alkaline-earth metal sulfide, alkaline-earth metal nitride or alkaline-earth metal alkoxide. The strong polar solvent is N,N-Dimethylformamide, N,N-Dimethylacetamide, dimethyl sulfoxide or N-methyl pyrrolidone. The preparing method has advantages of low price and easy availability of raw material, low cost, simple preparing process, high safety and environment-friendly performance. The prepared carbon material has excellent double-layer capacitance and important popularization value.
Owner:BEIJING UNIV OF CHEM TECH
Method for continuously preparing emamectin benzoate and intermediate thereof
PendingCN113072598AContinuous production operationImprove product quality stabilitySugar derivativesSugar derivatives preparationReaction temperatureBenzioc acid
The invention relates to a method for continuously preparing an emamectin benzoate intermediate. The method specifically comprises the following steps of dissolving C4''-methylimino-5-allyl formate-abamectin B1 in alkyl halide, pumping the dissolved C4''-methylimino-5-allyl formate-abamectin B1 and C1-4 alcohol into a mixer for mixing, pumping a mixture and a reducing agent solution into a micro-channel modular reaction device, and controlling the reaction temperature to be -15 to 25 DEG C and the reaction retention time to be 3 to 50 seconds to obtain C4''-methylamino-5-allyl formate-abamectin B1. The invention also discloses a method for continuously preparing emamectin benzoate. According to the technical scheme, the modular micro-channel reaction device is adopted, so that continuous production operation can be achieved, and the product quality stability is greatly improved; dichloromethane is used as a solvent in all the reaction steps, so that the solvent is the same and cross mixing of solvents is avoided; and the mass and heat transfer capability is greatly improved, the reaction selectivity is improved, side reactions are reduced, the yield is improved, the reaction rate is effectively increased, and the reaction time is shortened.
Owner:QINGDAO KYX CHEMICAL CO LTD
(FeCuZn) F3/rGO composite porous nanomaterial and lithium-fluorine battery
PendingCN114597327AHigh internal conductanceEffective charge transferActive material electrodesElectrolytic agentNano structuring
The invention discloses a (FeCuZn) F3 / rGO nano material with a porous nano structure as well as a preparation method and application of the (FeCuZn) F3 / rGO nano material. The preparation method comprises the following steps: taking fluorine-containing ionic liquid as a fluorine source, taking inorganic ferric salt, inorganic copper salt and inorganic zinc salt as alkali metal sources, mixing the fluorine source and the alkali metal sources with graphene dispersion liquid, and preparing the graphene composite material by utilizing a solvothermal method, the preparation method comprises the following steps: reacting fluorine ions released by fluorine-containing ionic liquid with metal ions released by inorganic metal salt to form (FeCuZn) F3, and further compounding the (FeCuZn) F3 with graphene to form the (FeCuZn) F3 / rGO composite porous nano material. The invention further discloses a lithium-fluorine battery, the (FeCuZn) F3 / rGO composite porous nanometer material is used as an electrode material, and lithium-fluorine battery ion electrolyte is adopted as electrolyte. The prepared (FeCuZn) F3 / rGO material has excellent electrochemical performance, a lithium-fluorine battery prepared by using the (FeCuZn) F3 / rGO material as an electrode material can reach high specific capacity of 800mAh. G <-1 > at a discharge rate of 0.5 C, and meanwhile, the material has good rate capability and excellent electrochemical stability.
Owner:ZHEJIANG UNIV
A Method to Accelerate the Surface Charge Dissipation of Epoxy Resin Materials
The invention relates to a method for accelerating the surface charge dissipation of epoxy resin materials, belonging to the technical field of electrical material insulation. The method of the present invention comprises the following steps: step 1, assembling a dielectric barrier discharge plasma processing device; step 2, cleaning and drying the epoxy resin material; step 3, placing the cleaned and dried epoxy resin material in the lower barrier medium Above: the gas is fed through the air inlet, the discharge voltage amplitude of the high-voltage power supply is between 10kV ~ 30kV, and the frequency is between 500Hz ~ 3000Hz to generate a uniform and stable discharge, and the epoxy resin material is treated with discharge plasma, The processing time is 10s~10min. The method of the invention accelerates the surface charge dissipation of the epoxy resin material, has short processing time, and the device used is simple in structure, low in cost, does not need to use chemical reagents, and has little environmental pollution.
Owner:INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
A kind of method for preparing titanium nitride nano film on the surface of substrate, substrate with film and application thereof
ActiveCN108546929BLower secondary electron emission coefficientHigh response controllabilityChemical vapor deposition coatingTitanium nitridePhysical chemistry
The invention provides a method for preparing a titanium nitride nano film on a substrate surface, a substrate with the film and application thereof, and belongs to the technical field of secondary electron emission suppression. The method comprises the following steps: transferring a substrate to a reaction chamber through a pre-vacuum chamber, and vacuuming the reaction chamber; introducing an inert gas into the reaction chamber, annealing the substrate; returning the annealed substrate to the pre-vacuum chamber, and using an ammonia gas plasma and a gaseous titanium source for a plurality of gas washing cycles of the reaction chamber; sending the substrate back to the reaction chamber, maintaining the temperature of the reaction chamber at 150 to 220 DEG C, and using the ammonia gas plasma and the gaseous titanium source for plasma enhanced titanium nitride atomic layer deposition reaction to obtain the substrate with the titanium nitride nano film. The ultrathin film prepared by the method has strong controllability, bonding strength between the film and the substrate is high, surface conformality is good, and surface uniformity in complex structures such as plane and porous structures is high.
Owner:XIAN INSTITUE OF SPACE RADIO TECH
A kind of new preparation method of o-methylisourea methylsulfate
ActiveCN108047094BHigh purityShort reaction timeUrea derivatives preparationOrganic compound preparationPhysical chemistryReaction temperature
The invention discloses a new preparation method of O-methyl isourea methyl sulfate. The method includes the following steps that a certain amount of dimethyl sulphate is added in a 500-mL three-mouthreaction bottle, quantitative urea is added in batches, after reaction liquid is clear, a thermal insulation reaction is conducted for a certain time, and the product, namely O-methyl isourea methylsulfate, is obtained. Urea and dimethyl sulphate are adopted as raw materials for the reaction under the microwave effect to prepare O-methyl isourea methyl sulfate. The method has the advantages thatthe reaction can smoothly occur at the low temperature at which a conventional method is difficult to conduct, the reaction time is largely shortened, and the reaction efficiency and the product purity are improved; the temperature is controlled to be 45-70 DEG C, reduction of the reaction temperature not only can reduce the safety risk, but also can reduce side reactions in the production process, and the product yield is thus increased to 80%.
Owner:HUBEI YUANDA FUCHI PHARMA CHEM
Method for cross coupling of N-arylamine and cyclic ketoxime ester C (sp3)-C (sp3) through photooxidation reduction catalysis
ActiveCN114478380AGood to excellent conversionThe catalytic reaction conditions are mild and simpleOrganic compound preparationChemical recyclingPtru catalystAlkylation
The invention discloses a method for cross coupling of N-arylamine and cyclic ketoxime ester C (sp3)-C (sp3) through photooxidation reduction catalysis. According to the method, cyclic ketoxime ester is taken as a cyanogen alkylation reagent, C (sp3)-C (sp3) cross-coupling reaction of N-arylamine and cyclic ketoxime ester is realized under the condition of no metal catalysis, various N-arylamine and cyclic ketoxime ester are converted into corresponding target compounds at good to excellent yield under mild conditions, and the method has a wide reaction substrate application range. The synthesis strategy can be applied to structural modification of d-aminocarbonyl compounds and oligopeptide compounds. According to the present invention, the catalytic reaction condition is mild and simple, the catalytic reaction can be smoothly performed at the room temperature by using the 3CzClIPN as the catalyst, the reaction controllability is high, the cost is low, the high regioselectivity can be obtained without using the metal catalyst, the alkali and / or the other ligand, and the method is suitable for the large-scale production;
Owner:NANCHANG HANGKONG UNIVERSITY
Preparation method of 6-nitro-4-substituted aminoquinazoline derivative
ActiveCN110577520AHigh reactivityStrong response specificityOrganic chemistryThiazoleCondensation reaction
The invention provides a preparation method of a 6-nitro-4-substituted aminoquinazoline derivative. The method comprises the following steps: carrying out an amidation reaction on 2-halo-5-nitrobenzoate and 4-(thiazole-2-yl)methoxy-3-chloroaniline in the presence of a catalyst to obtain N-[4-(thiazol-2-yl)methoxy-3-chlorphenyl]-2-halo-5-nitrobenzamide, and carrying out substitution and condensation reactions on the N-[4-(thiazol-2-yl)methoxy-3-chlorphenyl]-2-halo-5-nitrobenzamide and a formamidine salt through a one-pot process in the presence of an acid-binding agent to obtain 6-nitro-4-[4-(thiazol-2-yl)methoxy-3-chlorphenyl]aminoquinazoline. The method has the advantages of cheap and easily available raw materials, good raw material stability, high reaction selectivity, easiness in operation of the reactions, and high yield and high purity of the product.
Owner:XINFA PHARMA
Preparation method of shape memory polyurethane based on lactide and 1, 4-p-dioxanone
Owner:CHONGQING UNIV
based on au-fe 3 o 4 Melamine dual-mode sensor based on composite nanoparticles and its preparation
InactiveCN104764706BHigh selectivityImprove anti-interference abilityColor/spectral properties measurementsMaterial magnetic variablesComposite nanoparticlesUltraviolet absorption spectrum
The invention relates to a melamine dual-mode sensor based on Au-Fe3O4 composite nanoparticles and a preparation method thereof. The invention relates to the field of nuclear magnetic resonance sensing. First, oleylamine oleic acid on the surfaces of the Au-Fe3O4 composite nanoparticles is stripped through NOBF4; and a specific receptor unit modifies the surfaces of the composite nanoparticles stripped by NOBF4 under the strong coordination effect of an Au-S bond, thus obtaining target composite nanoparticles which can be used for preparing the melamine dual-mode sensor. Compared with prior art, the dual-mode sensor provided by the invention has the advantages that in the presence of melamine, dispersed-state nanoparticles are induced to aggregate so that the transverse relaxation time of water protons around the nanoparticles and the ultraviolet absorption spectrum of the nanoparticles are changed. According to the sensor, melamine is detected with both an ultraviolet absorption spectrum method and a nuclear magnetic resonance method; therefore, the sensor has the advantages of wide application range, high selectivity and high interference resistance. A method is provided for realizing fast application under different actual situations.
Owner:SHANGHAI NORMAL UNIVERSITY
Method for treating printing and dyeing wastewater with rare earth cerium doped titanium-based manganese dioxide electrode
InactiveCN102229442BImprove removal efficiencyHigh response controllabilityWater/sewage treatmentElectrolysisDyeing wastewater
The invention discloses a method for treating printing and dyeing wastewater by using a rare earth cerium-doped titanium-based manganese dioxide electrode. Wherein the electrode is composed of an inner titanium substrate, an intermediate layer of tin antimony oxide and a surface coating of rare earth cerium doped manganese dioxide; the treatment method is to use a rare earth cerium doped titanium-based manganese dioxide electrode as an anode, titanium The plate is the cathode, the distance between the electrode plates is 2.5-7cm, the concentration of sodium chloride in the electrolyte is 0.1mol / L, the pH is 8-10, the current density is 30mA / cm2, and the electrolysis time is 1-1.5h. When the heterotitanium-based manganese dioxide electrode is used to treat the simulated printing and dyeing wastewater, the chromaticity removal rate of the wastewater reaches more than 96%, and the COD removal rate reaches 84%-91%.
Owner:SHANGHAI UNIVERSITY OF ELECTRIC POWER
Preparation method of 6-substituted furyl-4-substituted aminoquinazoline derivatives and key intermediates thereof
Owner:XINFA PHARMA
A kind of room temperature preparation method of heteroatom-doped carbon material
ActiveCN104891475BLow priceLow costCarbon preparation/purificationN dimethylformamidePolyvinyl chloride
The invention relates to a method for preparing a heteroatom-doped carbon material at a room temperature. The method comprises the following steps: mixing a halogenated macromolecule and strong base with a strong polar solvent so as to obtain a mixture, grinding the mixture at the room temperature, and directly cleaning and drying after completion of grinding, so as to obtain the heteroatom-doped carbon material, wherein the halogenated macromolecule is polyvinylidene difluoride, polyvinylidene chloride or polyvinyl chloride, the strong base is alkali (earth) metal hydroxide, alkali (earth) metal alkoxide, alkali (earth) metal sulfide, alkali (earth) metal amides or alkali (earth) metal nitride, the strong polar solvent is N,N-dimethylformamide, N,N-dimethylacetamide, dimethyl sulfoxide or nitrogen methyl pyrrolidone and the room temperature refers to 10-40 DEG C. According to the method, the raw materials are cheap and easy to obtain, the operation is simple, safety is high and the method is very suitable for industrial expanded production.
Owner:BEIJING UNIV OF CHEM TECH
A kind of synthetic method for the key intermediate of synthetic lactate dehydrogenase A inhibitor
ActiveCN109369631BMild reaction conditionsAvoid low temperature reactionOrganic chemistry methodsPiperidinedioneCombinatorial chemistry
The invention relates to a synthesizing method of a key intermediate compound X for synthesizing a lactate dehydrogenase A (LDHA) inhibitor. According to the synthesizing method, a compound IX is prepared through the steps such as addition, oxidization, replacing and acidolysis by adopting a compound I as a raw material; and a the compound X is prepared by the compound IX through a enzyme ring closing, and through the method, the compound X with the single configuration can be prepared, wherein the ee value of the compound X is higher than 99%. A reaction is easy to operate, simple easy and convenient in subsequentto after-treatment, high in total yield, environmentally friendly, low in cost and suitable for industrial production. (Pplease see the specifications for the chemical structuralformulas).
Owner:SHANGHAI HAOYUAN MEDCHEMEXPRESS CO LTD
A kind of preparation method of 6-nitro-4-substituted aminoquinazoline derivatives
ActiveCN110577520BHigh reactivityStrong response specificityOrganic chemistryBenzoic acidChlorobenzene
Owner:XINFA PHARMA
Composite edible gel material capable of forming into thermal irreversible gel by means of thermal melting and preparation method thereof
ActiveCN102150767BHigh response controllabilityKeep the flavorFood preparationPhosphateCalcium alginate
The invention provides a composite edible gel material capable of forming into a thermal irreversible gel by means of thermal melting. The composite edible gel material comprises the components in weight percent: 10-60% of microcapsule particles, 2%-20% of retarder and 30%-70% of alginate. The invention further provides a preparation method of the composite edible gel material capable of forming the thermal irreversible gel by means of thermal melting. The preparation method of the composite edible gel material comprises the step of mixing the microcapsule particles, the alginate with the phosphate according to a certain proportion. The composite edible gel material is added into the water to be heated up to the dissolving temperature of the microcapsule wall material, the packed gel agent is released out of the microcapsule particles, the packed gel agent is reacted with the alginate under the delayed coagulation of the phosphate to form the irreversible calcium alginate gel, and thecalcium alginate gel can not be melted only according to the heat change, so that the special flavor and the quality structure of the hot food can be kept; and the gel forming time can be controlled according to the practical situation in the specific production process, so that the requirement of the production operation can be met.
Owner:青岛海与宝宝营养食品有限公司
Preparation method of cationic waterborne polyurethane, leather back cover resin and leather coating
ActiveCN111533875BImprove mechanical propertiesImprove chain extension efficiencyRosin coatingsPretreated surfacesPolymer sciencePolymer chemistry
The invention relates to a preparation method of cationic water-based polyurethane, leather back cover resin and leather coating, and belongs to the field of polymer material preparation. The present invention combines the quaternization neutralization reaction with the acid neutralization reaction, and at the same time further assists the Michael addition reaction for post-chain extension to improve the reaction degree of the cationic hydrophilic chain extender in the synthesis process, and prepares a soft The cationic water-based polyurethane of the aliphatic system, the yellowing resistance grade of the cationic water-based polyurethane is ≥3, the modulus is as low as 0.5-1MPa, the breaking strength is 5-10MPa, and the elongation is 1000-1500%; the cationic water-based polyurethane Polyurethane is added with other synergists to prepare the back cover resin. The back cover resin is sprayed on the leather and then heated and dried in a gradient to endow the leather cover with better flex resistance and flexibility. Leather sealant resin used.
Owner:HEFEI KETIAN WATERBORNE TECH CO LTD +1
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