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338 results about "Formic anhydride" patented technology
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Formic anhydride, also called methanoic anhydride, is an organic compound with the chemical formula C₂H₂O₃ and a structural formula of (H(C=O)−)₂O. It can be viewed as the anhydride of formic acid (HCOOH).
Preparation method of butylphthalide
InactiveCN101962374AReaction raw materials are readily availableFew reaction stepsOrganic chemistryBenzoic acidGrignard reagent
The invention discloses a preparation method of butylphthalide, which comprises the following steps: taking phthalic anhydride as a raw material; enabling the phthalic anhydride to carry out addition reaction with the Grignard reagent of butyl halide to obtain an intermediate of o-valeryl benzoic acid; and then, reducing by sodium borohydride, and carrying out acidic cyclization to obtain the butylphthalide. The phthalic anhydride and the butyl halide which are used as raw materials in the preparation method of the butylphthalide of the invention are commercial products, and the reaction raw materials can be obtained easily. Because the Grignard reaction, the sodium borohydride reduction and the acidic cyclization are classical reactions, the operation is simple, the industrialized production can be realized easily, the yield of the butylphthalide reaches 50-60%, and the purity of the butylphthalide reaches 97-98%.
Owner:SHANGHAI INST OF TECH
Preparation method for biological agent for preventing and controlling human papilloma virus infection
ActiveCN102631666AImprove stabilityLow costPeptide/protein ingredientsAntiviralsProtein solutionHuman papilloma virus infection
The invention discloses a preparation method for a biological agent for preventing and controlling human papilloma virus infection. The preparation method includes following steps: dissolving 3-hydroxy-phthalic anhydride HP into dimethyl sulfoxide DMSO to obtain saturated HP solution; dissolving beta-lactoglobulin beta-LG into 0.1M of sodium phosphate solution with pH (potential of hydrogen) of 8.5 to obtain protein solution with protein final concentration of 20mg / mL; and equally dividing the HP solution into five parts, adding the HP solution into the protein solution at every 12 minutes, shaking and mixing, adjusting pH of IMNaOH to be 8.5, leading the final concentration of anhydride in a reaction system to be 60mM, standing for 1 hour at the temperature of 25 DEG C, dialyzing by PBS (phosphate buffer solution) with pH of 7.4, performing filtration sterilization by a 0.45uM microfiltration membrane, and storing at the temperature of 4 DEG C so as to obtain a finished product. The biological agent has the advantages of capabilities of stopping HPV (human papilloma virus) from invading cells and stopping virus infection from spreading, safety, stability, low cost and the like.
Owner:SHANXI JINBO BIO PHARMA CO LTD
N-amino-1,2-cyclopentanediformylimine and preparation method thereof
InactiveCN101235011AFew reaction stepsReduce manufacturing costOrganic chemistryImideCombinatorial chemistry
The invention discloses an N-amino-1, 2-cyclopentane dicarboximide whose formula is represented as right. The invention also discloses a corresponding preparation method which comprises using cyclopentane ortho-anhydride as raw material, carrying out hydrazine hydrate in solvent for refluxing reaction for 0.5-12h while the mol ratio of cyclopentane ortho-anhydride and hydrazine hydrate is 1:1-2.5, removing solvent after reaction, and drying to obtain N-amino-1, 2-cyclopentane dicarboximide. The N-amino-1, 2-cyclopentane dicarboximide can be used as the intermediate of gliclazide, thereby reducing the reaction route of gliclazide to reduce waste.
Owner:ZHEJIANG UNIV
Methoxy group naphthyl fluorescence marked water treating agent and its preparing method
InactiveCN1781857ARaw materials are easy to getMild reaction conditionsScale removal and water softeningSodium methoxideFluorescence
The present invention discloses water treating agent containing methoxy naphthalene as fluorescent marker. The water treating agent is prepared through the first reaction of 4-chloro-1, 8-naphthalic anhydride, glacial acetic acid and 3-dimethylamino propylamine to obtain 4-chloro-N-3-dimethylamino propyl-naphthyl imide; the subsequent reaction with sodium methoxide to introduce methoxy group and obtain 4, 4-methoxyl-N-3-dimethylamino propyl-naphthyl imide, which is reacted with allyl chloride to obtain quaternary ammonium salt of 4-methoxyl-N-3-dimethylamino propyl-naphthyl imide allyl chloride as fluorescent monomer with fluorescent characteristic and double bond; and the final polymerization with phosphorus containing compound, acrylic acid and other monomer to obtain the multifunctional water treating agent with corrosion retarding, scale inhibiting, dispersing and fluorescent tracing functions.
Owner:NANJING UNIV OF SCI & TECH
Phosphine-based Marpropy multipolymer containing fluorescent base-group and its production
InactiveCN1939945ARaw materials are easy to getMild reaction conditionsSodium methoxideEthylenediamine
A phosphino-based mapropyl copolymer containing fluorescent group and its production are disclosed. The process is carried out by taking 4-bromine-1,8-naphthalic anhydride, glacial acetic acid and N, N-dimethyl-ethylenediamine as raw materials to obtain 4-bromine-N-(2-N,, N,-dimethylbenzidine-ethyl)naphthalimide, reacting it with sodium methoxide to induce methoxy-group to obtain 4-methoxy-N-(2-N,, N,- dimethylbenzidine-ethyl)naphthalimide, reacting it with allyl chloride to obtain fluorescent monomer 4-methoxy-N-(2-N,, N,- dimethylbenzidine-ethyl)naphthalimide allyl ammonia chloride with fluorescent characteristic and double-bond, polymerizing it with sub-sodium phosphate, maleic anhydride, acroleic acid and propenyl-sodium sulfate to obtain the final product. It has fluorescent tracting, corrosion-inhibting, scale-inhibiting and dispersion functions.
Owner:NANJING UNIV OF SCI & TECH
Gas-phase oxidization process and process for the preparation of phthalic anhydride
InactiveUS6369240B1Change activityHigh activityOrganic oxidationOrganic compound preparationMaleic anhydrideChemistry
This invention relates to the vapor-phase oxidation of hydrocarbons by passing a gaseous mixture comprising of a molecular oxygen-containing gas and hydrocarbons which may contain substituents to a fixed bed of catalyst and provides a process for vapor-phase oxidation to be effected by passing a gaseous mixture of raw materials to a fixed bed of catalyst in which the void ratio of the catalyst layers increases by stages in one step or more from upstream downward in the flow of the gaseous mixture of raw materials. For example, the process can oxidize in vapor phase such hydrocarbons as naphthalene, xylene, benzene, toluene, durene, butene, acenaphthene, anthracene, indene and their derivatives in high yields with high productivity. Moreover, the process can prepare phthalic anhydride in high yields with high productivity by the vapor-phase oxidation of naphthalene or ortho-xylene.
Owner:NIPPON MICROMETAL
Safening 6-(trisubstituted phenyl)-4-amino-2-pyridinecarboxylate herbicide injury on cereal crops
ActiveUS20100130362A1Reduction of herbicidal effectUnexpected effectBiocideDead animal preservationCarboxylic acidToxicology
Herbicidal injury caused by 6-(trisubstituted phenyl)-4-amino-2-pyridinecarboxylates in wheat and barley is reduced with the use of AD67 (MON 4660), benoxacor, 2-CBSU, daimuron, dichlormid, dicyclonon (BAS 145 138H), fenchlorazole-ethyl, fenclorim, fluxofenim, furilazole (MON 13900), glyphosate, isoxadifen-ethyl, mefenpyr-diethyl, naphthalic anhydride, oxabetrinil and mixtures thereof.
Owner:CORTEVA AGRISCIENCE LLC
Method for preparing trinexapac-ethyl
InactiveCN1850776AEasy to operateMild responseOrganic compound preparationCarboxylic acid esters preparationHigh pressureMedicinal chemistry
This invention discloses anti inverse ester preparation method. 2-acetonyl-1, 4 diethyl succiante is high pressure condensed by diethyl maleate and acetone under organic amine condition. Then it cycles to get 3, 5-dioxygen hexahydrobenzoic acid ethyl esterunder sodium alcoholate condition, finally anti inverse ester is got by reacting with ring third formic anhydride under alkali condition. The operation is simple, reaction is wild, material is easy to get, yield is high, product purity is high, and generating cost is reduced, so it is propitious to industrial manufacure.
Owner:ZHEJIANG UNIV
Clean esterification method for producing bialkyl ortho phthalate
InactiveCN1903824AHigh esterification capacityLow reaction temperatureOrganic compound preparationOrganic-compounds/hydrides/coordination-complexes catalystsIonAcid catalyzed
The present invention relates to a clean esterification method for producing dialkyl phthalate. It is characterized by that it adopts the ionic liquid formed from sulfonic acid group functionalized alkyl pyridine cation or sulfonic acid group functionalized 1,3-dialkyl iminazol cation or 2-oxopyrrolidine cation and organic or inorganic anion X as catalyst of reaction and reaction medium; at normal pressure its reaction temperature is 90-130deg.C and reaction time is 1-2hr, it can catalyze the esterification reaction of phthalic anhydride and isooctanol or n-octanol so as to obtain the invented dialkyl phthalate.
Owner:QINGDAO UNIV OF SCI & TECH
Method to prepare bis(haloimides)
Bis(halophthalimides) are prepared in mixture in an organic liquid such as ortho-dichlorobenzene or anisole, by a reaction at a temperatire of at least 150° C. between at least one diamine compound and at least one halophthalic anhydride in the presence of imidization catalyst. The reaction mixture is maintained at about 15% by weight solids content and rich in the halophthalic anhydride by constantly monitoring the reaction mixture using analytical methods such as high performance liquid chromatography. The product mixture may be directly employed in the direct preparation of polyetherimides, and similar slurries may be employed to prepare other polyether polymers.
Owner:SHPP GLOBAL TECH BV
Preparation method of rubber composition used for automobile and preparation method thereof
The invention discloses a rubber composition used for automobile, which comprises the following raw materials: natural rubber, cis-1,4-polybutadiene rubber, butadiene-styrene rubber, a vulcanizing agent DTDM, sulphur, a promoter NS, a promoter CZ, a promoter NOBS, a promoter D, a promoter Rheineck ZBOP / S, benzoic acid, phthalic anhydride, high wear resistant carbon black, modified white carbon black, zinc oxide, stearic acid, an activator EBS, a rubber homogenizing agent, a protection wax OK5194, a rubber protection wax LY-01, aromatic hydrocarbons oil, an antioxidant 4020, an antioxidant V-3100, an antioxidant RD, an antioxidant 800-A, an antioxidant HS-911, an antioxidant FR, a tackifying resin E1102, and wax objects. The rubber composition has good wear resistance and heat resistance, so that the rubber composition with good comprehensive performance used for the automobile is obtained.
Owner:TONGLING SANSHENG ELECTRONICS
N-type thermoelectric material compounded by perylene bisimide or naphthalimide and carbon nano tubes and preparation method of n-type thermoelectric material
InactiveCN106229403AEasy to achieve large-scale preparationScale Quantity Preparation OutstandingThermoelectric device manufacture/treatmentThermoelectric device junction materialsThermoelectric materialsImide
The invention relates to an n-type thermoelectric material compounded by 3,4,9,10-perylene imide (PDIN) or 1,4,5,8-naphthaline imide (NDIN) and carbon nano tubes, and a preparation method of the n-type thermoelectric material, in particular to a method of synthesizing PDIN or NDIN micromolecules with n-type conduction property by taking 3,4,9,10-perylene tetra-formic anhydride (PD) or 1,4,5,8-naphthaline tetra-formic anhydride (ND) as raw materials, and then compounding with single-walled carbon nanotubes (SWCNT) to prepare the n-type thermoelectric material. The n-type compounded thermoelectric material is an n-type thermoelectric material efficiently prepared by taking the cheap and easy-to-get p-type carbon nanotubes as a raw material, taking DMSO as a solvent, taking the NDIN or PDIN as a mixing body, and ultrasonically mixing at room temperature. The stable n-type thermoelectric material is formed by coating the surfaces of NDIN or PDIN crystals with the carbon nanotubes. The invention provides the high-performance n-type thermoelectric material, and also provides the new method for preparing the flexible and organic thermoelectric material with the advantages of simple and convenient preparation process, no toxicity and no need of aftertreatment.
Owner:INST OF CHEM CHINESE ACAD OF SCI
Thermoplastic polyimide resin and preparation method thereof
ActiveCN102634021AImprove thermal stabilityGood thermoplastic processabilityAdhesivesEngineering plasticBPDA
The invention discloses thermoplastic polyimide resin and a preparation method thereof. According to the thermoplastic polyimide resin, 1, 2, 3, 4--biphenyl-tetracarboxylic acid dianhydride (BPDA) is reacted with other mixed dianhydride formed by common tetracarboxylic acid dianhydride, diamine and phthalic anhydride or aniline to polymerize the mixed dianhydride with the diamine, and the phthalic anhydride or the aniline serves as a blocking agent to control molecular weight, thus obtaining the polyimide resin with good thermal stability and excellent thermoplastic processability. The inherent viscosity of the polyimide resin can reach 0.22dL / g to 0.90dL / g, and the glass-transition temperature of the polyimide resin ranges from 220 DEG C to 420 DEG C, therefore, the polyimide resin has wide application in the preparation of materials such as thermostability engineering plastics, thin films, adhesives and the like.
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
Specific fluorescent probe for identifying hydrazine and application thereof
InactiveCN103923071AStrong specificityGood fluorescence propertiesOrganic chemistryFluorescence/phosphorescenceChemical synthesisSodium acetate
The invention discloses a specific fluorescent probe for identifying hydrazine and an application thereof, belonging to the field of fine chemical engineering. The fluorescent probe is a 4-trifluoromethyl-7-aminocoumarin derivative, and is prepared by steps of putting 4-trifluoromethyl-7-aminocoumarin, phthalic anhydride and sodium acetate into a reaction bottle in proportion, and performing backflow by adding acetic acid. The fluorescent probe and the corresponding hydrazine content detection process cannot be interfered by biological system matrixes and impurities, so the fluorescent probe can be used for quantitative measurement of the hydrazine content in various biological systems. The probe has high specificity, and can be subjected to hydrolysis after specifically reacting with hydrazine; a hydrolysate has good fluorescence characteristics. Raw materials are cheap and easily available, can be obtained through chemical synthesis, and synthesis process is simple and feasible; the probe has high sensitivity, is suitable for detecting the hydrazine content in cells, and can be used for measuring the hydrazine content by drawing a standard curve. The probe is a ratio type probe, and effectively avoids the influences of non-uniform probe distribution, environmental factors, actuators and the like on the measurement results.
Owner:CHANGSHU RES INST OF DALIAN UNIV OF TECH CO LTD
Preparation method of hyper-branched bio-based epoxy resin
The invention relates to a preparation method of hyper-branched bio-based epoxy resin. The method comprises the following steps: initiating ring-opening polymerization of lactide by a coinitiator polyol to obtain hydroxyl-terminated polylactic acid with a low molecular weight, synthesizing carboxyl-terminated hyper-branched polyester from trimellitic anhydride and the obtained polylactic acid, and synthesizing the hyper-branched epoxy resin from chloropropylene oxide and the obtained hyper-branched polyester. Lactide is from corn, potato and other crops, has wide sources, and is in favor of reducing the consumption of petroleum resources and the discharge of CO2, and the obtained epoxy resin is a novel functional material with excellent performances, has the advantages of low viscosity, high solid content, easy film formation, and good adhesion and thermal stability, has good toughening and manufacturability improving effects when blended with common epoxy resin, can be used in adhesives, coatings and composite materials as a matrix, and is suitable for molding technologies of various composite materials, so the hyper-branched bio-based epoxy resin has very wide application prospect.
Owner:JIANGSU SUPLA BIOPLASTICS CO LTD
Polyurethane resin for hydrolysis-resistant film nubuck and preparation method of polyurethane resin
ActiveCN104277202AImprove hydrolysis resistanceUniform and dense vertical cell structureTextiles and paper1,4-ButanediolAdipic acid
The invention provides polyurethane resin for hydrolysis-resistant film nubuck and a preparation method of the polyurethane resin. The polyurethane resin for the hydrolysis-resistant film nubuck is prepared by adopting the following components in percentage by weight: 5.0%-12.0% of poly(adipic acid) 1,4-butanediol esterdiol, 7.0%-9.0% of poly(adipic acid) phthalic anhydride neopentyl glycol esterdiol, 4.0%-8.0% of polypropylene oxide glycol, 0.01%-0.10% of antioxidants, 1.0%-3.0% of chain extenders, 0.05%-0.50% of auxiliary agents, 9.0%-13.0% of 4,4-diphenylmethane diisocyanate, 0.05%-0.50% of methanol and 55%-73% of dimethyl formamide. The film nubuck prepared from the polyurethane resin provided by the invention has a uniform and compact upright cellular structure, has good color development after being smoothed and is high in hydrolysis resistance and low in cost.
Owner:ZHEJIANG HUAFON SYNTHETIC RESIN
Chitosan/anhydride modified biological carbon composite and preparation method and application thereof
InactiveCN106890624AExtensive sources of raw materialsLow priceOther chemical processesWater contaminantsBiomassChemistry
The invention relates to a chitosan / anhydride modified biological carbon composite and a preparation method and application of the chitosan / anhydride modified biological carbon composite. The composite takes biological carbon as a matrix, and the surface of the matrix is modified through chitosan and anhydride. The preparation method comprises the following specific steps: firstly pyrolyzing biomass powder to obtain the original biological carbon, then preparing the chitosan modified biological carbon composite, and finally obtaining the product through the reaction of pyromellitic dianhydride and the chitosan on the biological carbon composite. The chitosan / anhydride modified biological carbon composite has the characteristics of rich raw material, low manufacturing cost, more adsorption sites, high adsorbing capacity and no secondary pollution, and the removal efficiency of a heavy metal is relatively high.
Owner:HUNAN UNIV
Heat-resistant single-component moisture-curing polyurethane adhesive and preparation method and application thereof
InactiveCN109749692AHigh bonding strengthImprove heat resistanceNon-macromolecular adhesive additivesPolyureas/polyurethane adhesivesPolyesterPolyurethane adhesive
The invention discloses a heat-resistant single-component moisture-curing polyurethane adhesive and a preparation method and application thereof. The preparation method comprises the following step: carrying out esterification reaction on castor oil, phthalic anhydride and dihydric alcohol at first to prepare a castor oil modified polyester polyol with the functionality of 2.0-2.5 and containing abenzene ring aromatic structure and a long fatty acid molecular segment. When partially substituted polyols are used for modification of polyurethane, rigid benzene rings can be introduced into a soft segment. Distribution of microcrystals in the soft segment structure is controlled, so that the flexibility of an adhesive layer is enhanced; the cohesive strength is increased, and the heat resistance is improved; meanwhile, the modified castor oil polyester polyol can effectively control the crosslinking degree of the polymer and prevent the drastic reduction of performance of an adhesive or coagulation caused by excessive crosslinking degree. The castor oil modified polyester polyol is used for modifying polyurethane, so that the adhesive property and the heat resistance of the adhesive can be obviously improved. The adhesion problem of cracking at an adhesion position of wood during high-temperature baking processes such as wood drying and bent plate making in a wood processing process is solved.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI +1
Unsaturated polyester resin flame-retardant material and preparation method thereof
The invention discloses an unsaturated polyester resin flame-retardant material and a preparation method thereof. The unsaturated polyester resin flame-retardant material comprises the following components in percentage by weight: 16.32%-25.04% of maleic anhydride, 8.47%-46.35% of DOPOMA (2-[10-(9,10-dihydro-9-oxa-10-phosphaphenantrene-10-oxide-10-yl)] maleic acid), 13.45%-18.91% of phthalic anhydride, 0%-5.12% of adipic acid, 5.48%-7.70% of glycol, 18.0%3-27.70% of propylene glycol, 9.19%-12.95% of diethylene glycol, 5.1%-7% of water-carrying agent, 0.02% of catalyst, 0.02% of polymerization inhibitor, 25%-35% of cross-linking agent, 25%-35% of diluent, 1% of modified nano SiO2, 1% of initiating agent, 0.25% of accelerant and 0.05% of defoaming agent; the raw material DOPOMA is synthesized by DOPO and MA at a mole ratio of 1:1.05; maleic anhydride, phthalic anhydride, adipic acid, glycol, propylene glycol and diethylene glycol are added to directly synthesize flame-retardant unsaturated polyester by a one-step method; the initiating agent, the accelerant and the defoaming agent are added to the flame-retardant unsaturated polyester doped with nano SiO2, heated and cured; and the unsaturated polyester resin flame-retardant material can be obtained.
Owner:LANZHOU UNIVERSITY OF TECHNOLOGY
Phosphorous flame-retardant unsaturated polyester resin and preparation method thereof
The invention discloses phosphorous flame-retardant unsaturated polyester resin and a preparation method thereof. A formula of the phosphorous flame-retardant unsaturated polyester resin comprises the following components in percentage by weight: 18.39%-25.04% of maleic anhydride, 8.47%-25.35% of DOPOMA (2-[10-(9,10-dihydro-9-oxa-10-phosphaphenantrene-10-oxide-10-yl)] maleic acid), 13.45%-18.91% of phthalic anhydride, 6.80%-7.70% of glycol, 24.26%-27.70% of propylene glycol, 11.75%-12.95% of diethylene glycol, 5.1%-7% of a water-carrying agent, 0.02% of a catalyst, 0.02% of a polymerization inhibitor, 25%-35% of a cross-linking agent, and 25%-35% of a diluent. The preparation method of the polyester resin comprises the steps of synthesizing the raw material DOPOMA with DOPO and MA at a molar ratio of 1:1.05, adding maleic anhydride, phthalic anhydride, glycol, propylene glycol and diethylene glycol, and directly synthesizing the flame-retardant unsaturated polyester resin with a one-step method.
Owner:LANZHOU UNIVERSITY OF TECHNOLOGY
High performance and low cost polyimide preformed polymer and preparation method thereof
The invention pertains to the field of polymer materials, in particular to a polyimide prepolymer with comparatively high vitrification transformation temperature (270 DEG C to 320 DEG C), comparatively high stability of thermal oxidization, comparatively low viscosity and comparatively low cost, and a preparation method of the prepolymer. 1, 4-(para-aminophenoxy)-2-phenylbenzene is firstly added into an organic solvent and completely dissolved, then pyromellitic dianhydride is added into the organic solvent and reacts at room temperature for 3 hours to 10 hours, and then an end capping agent, 4-(2-phenylacetylenel) phthalic anhydride is added and the reaction continues for 1 hour to 3 hours. An obtained polyamide acid solution is put into an oven and the solvent is removed; under the condition of vacuum, the temperature is increased for thermal imidization and an obtained product is crushed to obtain the powdered polyimide prepolymer with a structure formula shown as follows.
Owner:JILIN UNIV
Method of making bisimides
The present invention provides a method for preparing relatively insoluble bisimides under conditions which afford high imidization reaction rates and which permit the monitoring and adjustment of reactant stoichiometry at any stage of the reaction. The bisimides provided by the present invention are prepared either by reaction of a diamine such as 4,4′-diaminodiphenylsulfone (DDS) with an anhydride, for example 3-chlorophthalic anhydride (3-ClPA) in the presence of a solvent at a pressure greater than one atmosphere and at a temperature above the normal boiling point of the solvent, or by reaction of a monoamine with a dianhydride under the same conditions. In one embodiment, the relatively insoluble product bisimides provided by the present invention have a solubility in ortho-dichlorobenzene of less than about 10 percent by weight at a temperature of about 180° C.
Owner:SHPP GLOBAL TECH BV
11-replaced oxoisoaporphine derivatives as well as synthetic method and application thereof
InactiveCN103923010AStrong inhibitory activityGood potential medicinal valueOrganic active ingredientsSenses disorderKetoneStructural formula
The invention discloses a series of 11-replaced oxoisoaporphine derivatives as well as a synthetic method and an application thereof. The synthetic method comprises the following steps: (1) carrying out ring closing reaction on 3-chlorophthalic anhydride and phenylethylamine as raw materials so as to construct a 10-Cl-1-azabenzanthrone parent body; (2) nitrating the parent body compound so as to obtain a 11-site nitrated product, and reducing the 11-site nitrated product so as to obtain 11-amino-10-chlorine-7H-dibenzoquinoline-7-ketone; and (3) reacting the 11-amino-10-chlorine-7H-dibenzoquinoline-7-ketone with an acyl chloride compound connected with piperidine so as to obtain a corresponding target product. Through study, the applicant finds that the series of derivatives have very strong inhibitory activity on acetylcholin esterase and are expected to be used for treating AD (Alzheimer Disease), cerebrovascular dementia and related diseases caused by cholinergic neurotransmitter reduction. The structural formula of the 11-replaced oxoisoaporphine derivatives is shown in descriptions.
Owner:GUANGXI NORMAL UNIV
Polyethylene terephthalate composite material for 3D printing and preparation method thereof
The invention provides a polyethylene terephthalate composite material for 3D printing and a preparation method thereof. The preparation method of the composite material comprises the following steps of: dissolving polyethylene glycol into isopropanol; adding benzyl triethylamine bromide, and standing at room temperature; then sequentially adding benzoic anhydride and ethyl alpha-cyanoacrylate, and stirring at room temperature; then adding polyethylene terephthalate granules, heating, stirring, and cooling to room temperature to obtain the polyethylene terephthalate composite material for 3D printing, wherein the content of polyethylene terephthalate is 40%-50%, the content of ethyl alpha-cyanoacrylate is 5%-25%, the content of polyethylene glycol 4000 is 5%-20%, the content of isopropanol is 15%-30%, the content of benzyl triethylamine bromide is 1%-5%, and the content of benzoic anhydride is 1%-5%. The polyethylene terephthalate composite material prepared through the method provided by the invention can be used for 3D printing within a temperature range of 40-60 DEG C without plugging a spray head of a 3D printer.
Owner:TAICANG BIQI NEW MATERIAL RES & DEV
Concurrent Sulfur Dioxide Oxidation Process and its Use in Manufacture of Tetrabromophthalic Anhydride
InactiveUS20070260072A1Efficient use ofOrganic compound preparationSulfur compoundsPtru catalystPhysical chemistry
Sulfur trioxide is formed by a process wherein a first gaseous stream comprised of SO2, SO3, and oxygen and / or air is passed into a bed of a vanadium-containing catalyst that oxidizes S02 to SO3and that releases therefrom a second gaseous stream comprised of sulfur trioxide. This process is improved in a first case by providing vaporized sulfur in the first gaseous stream so that the resultant mixture passes through a substantial portion of the catalyst bed, and maintaining the catalyst bed at one or more temperatures in the range of about 450 to about 700° C. The sulfur is oxidized to S02. As a result, the second gaseous stream released from the downstream end portion of the catalyst bed has an enriched content of sulfur trioxide, which can be used for production of compounds such as tetrabromophthalic anhydride. In a second case, a stream of sulfur dioxide is generated from sulfur and an oxidant, and this stream is introduced into the first gaseous stream referred to above. In this second case, the feed of sulfur dioxide replaces the vaporized sulfur used in the first case. As in the first case, an enriched stream of sulfur trioxide is released from the downstream end of the catalyst and can be used for producing compounds such as tetrabromophthalic anhydride.
Owner:ALBEMARLE CORP
Sulfide heavy metal chelating agent and preparation method thereof
InactiveCN102531137APrecipitation particles are largeDense flocWater contaminantsWater/sewage treatment by flocculation/precipitationTreatment effectWater insoluble
Owner:南京正隆顺达高分子材料有限公司
Negative plate and lithium ion battery
ActiveCN106340613AAdhesiveEffective rebound controlElectrode carriers/collectorsSecondary cellsAdhesiveConductive polymer
The invention provides a negative plate and a lithium ion battery. The negative plate comprises a negative electrode current collector and a negative electrode diaphragm; the negative electrode diaphragm comprises a negative electrode active substance and a conductive adhesive; the negative electrode current collector is prepared from rolled copper foil or stainless steel foil; the conductive adhesive is polyimidesiloxane containing conductive polymer chains; the conductive adhesive is prepared via amidation of tetra formic acid or tetra formic anhydride with diamine siloxane containing conductive polymer chains; and the molar ratio of the tetra formic acid or the tetra formic anhydride to the diamine siloxane containing conductive polymer chains is controlled to be (1.1-1.3):1. The negative plate possesses excellent conductivity and adhesive performance, and relatively low expansion ratio; and the lithium ion battery possesses excellent electrical properties and cycle performance.
Owner:CONTEMPORARY AMPEREX TECH CO
Water-based alkyd-acrylate dispersion as well as preparation method and application thereof
ActiveCN111138603AImprove compactnessImprove the level ofAnti-corrosive paintsPolymer sciencePtru catalyst
Owner:HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
Liquid cyclohexane-tricarboxylic acid anhydride
Owner:MITSUBISHI GAS CHEM CO INC
Terpolymer polynaphthalimide with widely adjustable information storage behaviors and preparation thereof
ActiveCN104072769AOvercoming the drawbacks of very limited ability to regulate storage behaviorWide variety of sourcesSolid-state devicesSemiconductor devicesPolymer scienceElectron donor
The invention belongs to the technical field of polymer information storage materials. By adopting a multielement copolycondensation process and using 4,4'-diamidotriphenylamine as an electron donor, 1,4,5,8-naphthyltetra formic anhydride as an electron acceptor and 9,9'-di(aminophenyl)fluorene as a third copolymerization unit, the composition of the copolymerization units is adjusted to successfully prepare the terpolymer polynaphthalimide with widely adjustable information storage behaviors. The structure is disclosed as Formula (I). The multielement copolycondensation process does not need special monomer design, can implement the functions of the material by using the existing monomer combination, and has the advantages of wide raw material sources and diversified structures. More importantly, the terpolymer polynaphthalimide has high performance adjustability, and can implement different information storage behaviors only by changing the copolymerization components, thereby effectively overcoming the defect that the binary system needs to synthesize a special monomer and has poor adjustability for the storage behaviors of the material. The process can be used for conveniently designing information materials with different storage behaviors according to needs, and thus, has very high practical value.
Owner:HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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