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155 results about "Anhydrous" patented technology
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A substance is anhydrous if it contains no water. Many processes in chemistry can be impeded by the presence of water, therefore, it is important that water-free reagents and techniques are used. In practice, however, it is very difficult to achieve perfect dryness; anhydrous compounds gradually absorb water from the atmosphere so they must be stored carefully.
Novel carborane- (siloxane or silane)- ethinyl high temperature resistant polymer and its preparation method
InactiveCN1884343AThe synthesis process is simpleRaw materials are easy to getFireproof paintsSilanesFunction group
The invention discloses a new kind of carborane- silane- phenylacetylene polymer and the method for preparing the same. Said polymer employs methylchlorosilane, phenylacetylene, carborane and organic lithium agent as raw material, anhydrous tetrahydrofuran (THF) as dissolvent and preparing with protection of nitrogen. The invention moderates molar ratio between simple function group ethynyl compound and carborane to easily control molecular weight of polymer, crosslinking density and carborane content, and realizes purpose of adjustable polymer property. The invention is characterized by simple process and easy operation. The prepared polymer forms thermostable thermosetting material with excellent thermal oxidation performance by heat, light and chemical initiation. Said thermosetting material can be produced to ceramic structure by heating on air or inactive gas. The polymer can be used as base resin and thermo-stable coating for advanced complex material and for preparing ceramic pioneer body.
Owner:EAST CHINA UNIV OF SCI & TECH
Method for preparing Salen-metal complex
InactiveCN102212085ALow costHigh catalytic efficiencyOrganic-compounds/hydrides/coordination-complexes catalystsCobalt organic compoundsSodium methoxideFiltration
The invention provides a method for preparing a Salen-metal complex. The method comprises the following steps of: under the argon atmosphere, adding ligands(II), sodium methoxide, absolute methanol soluble ligands(II) and sodium methoxide into a reactor in sequence; stirring the mixture for 2 minutes, and adding 1mol / L cobalt acetate anhydrous / methanol solution dropwise, wherein the molar ratio of the ligands(II) to sodium methoxide to cobalt acetate is 1:1:1; and making the mixture reacted at the room temperature for 24 hours, adding anionic salt which has the same molar weight as the cobalt acetate, stirring the mixture for three days in the air, stopping the reaction, concentrating the mixture, performing dissolution and filtration by adding methylene chloride, drying the filtrate by anhydrous sodium sulfate overnight, filtering the mixture, concentrating under reduced pressure, and drying the mixture under the vacuum condition to obtain the Salen-metal complex. The Salen-metal complex prepared by the method has the advantages of simple method, low cost and high catalytic efficiency.
Owner:HEBEI UNIV OF TECH
Antiperspirant formulations
InactiveUS6361766B1Excellently low visible depositCosmetic preparationsToilet preparationsWaxParticulates
Anhydrous antiperspirant formulations in which a particulate antiperspirant active is suspended in a carrier fluid can result in significant visible deposits when applied to skin or when transferred onto clothing.Anhydrous antiperspirant suspension sticks which exhibit very low visible deposits are obtainable by employing a carrier fluid in which at least 45% and preferably at least 60% of its weight comprises an oxygen-containing emollient oil having a refractive index of at least 1.465, in conjunction with structurant comprises a wax or a non-polymeric fiber-forming gellant, excluding certain gellants or gellant combinations. Preferred emollient oils include alkyl benzoates and alkylphenylsiloxanes. The waxes can even comprise fatty alcohols.
Owner:UNILEVER HOME & PERSONAL CARE USA DIV OF CONOPCO IN C
Preparation method for modified graphene oxide adsorption material
ActiveCN107497404AImprove stabilityEvenly distributedOther chemical processesWater contaminantsEthylenediamineN dimethylformamide
The invention provides a preparation method for a modified graphene oxide adsorption material. The preparation method comprises the following steps: (1) ultrasonically dispersing graphene oxide in anhydrous N,N-dimethylformamide, then adding diphenylmethane diisocyanate and carrying out a reaction; and (2) uniformly mixing diphenylmethane diisocyanate-functionalized graphene oxide with ethylenediaminetetraacetic acid, and successively carrying out grinding, washing and freeze-drying so as to obtain the modified graphene oxide adsorption material. According to the invention, isocyanate is used as a bridge body, and a composite material is prepared through amidation and urethanization; an adsorbent prepared by using the method contains both polycarboxy functional groups and polyhydroxyl functional groups, has excellent adsorption effect on heavy metal ions in wastewater, and can overcome the defect that a chelate is dissolved in water and cannot be separated when EDTA is individually used for heavy metal removal.
Owner:CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
Method for producing anhydrous citric acid crystal
InactiveCN102391103AUniform particle sizeWide particle size distributionCarboxylic compound separation/purificationNucleationSupersaturation
The invention provides a method for producing an anhydrous citric acid crystal. The method comprises the following steps of: concentrating citric acid solution until the degree of supersaturation is between 1.02 and 1.15 at temperature of above 36.6 DEG C, and adding an anhydrous citric acid seed crystal. In the method for producing the anhydrous citric acid crystal, the anhydrous citric acid seed crystal is added within the range of between 1.02 and 1.15 of the degree of supersaturation of the citric acid solution, the content of the anhydrous citric acid crystal in a mixture of the citric acid solution and the anhydrous citric acid crystal in the crystallization process is controlled to be between 20 and 50 weight percent, so that nucleation caused by crystal explosion during the earlier stage of crystallization and nonuniformity of crystal granules due to less crystal nucleus yield in the crystallization process are avoided, the number of the crystal granules is controlled stably and effectively, and thus the production of the anhydrous citric acid crystal is controllable, and the method is easy and convenient to operate. The anhydrous citric acid crystal produced according to the method is uniform in size distribution and attractive in appearance of products.
Owner:COFCO BIOTECHNOLOGY CO LTD
Anhydrous electrolyte of lithium storage battery, and lithium storage battery containing said electrolyte
Owner:SAMSUNG SDI CO LTD
Preparation and application method of solid phase extractant capable of simultaneously accumulating multiple heavy metal ions
InactiveCN101810939ACapable of simultaneous extractionImprove adsorption efficiencyIon-exchange process apparatusOther chemical processesIon contentFiltration
The invention relates to a preparation and application method of a solid phase extractant capable of simultaneously accumulating multiple heavy metal ions. Firstly, 2.5g of carboxylation carbon nano tube and 30 mL of anhydrous thionyl chloride react for 1-2 days at the temperature of 60-90 DEG C; pump filtration is carried out; after being cleaned, filter residue is dried in vacuum for the whole night to obtain an acylation carbon nano tube; the acylation carbon nano tube is dispersed in a solution composed of 1g of thiosemicarbazide and 100 mL of anhydrous N, N-dimethyl formamide; the mixture reacts under the protection of nitrogen with the temperature of 100 DEG C for 48 hours; pump filtration is carried out; after being cleaned, the filter residue is dried in vacuum for 1-2 days to obtain the solid phase extractant capable of simultaneously accumulating multiple heavy metal ions. The solid phase extractant serves as a column filler to dynamically accumulate 0.5-1 L of water samples to be detected, wherein the heavy metal ion content of the water samples is 1-5 mu g / L; and the solid phase extractant in which the heavy metal ions are accumulated is eluted and desorbed by utilizing dilute nitric acid, wherein the recovery rate is above 95%, and the desorbed solid phase extractant is repeatedly recycled for 2-3 times. The invention has high efficiency, is simple and can simultaneously accumulate various heavy metal ions, i.e. Cu (II), Ni (II), Zn (II), Cd (II) and Pb (II).
Owner:TONGJI UNIV
Preparation method of biotin-modified and rare earth-doped inorganic fluorescent nanoparticles
ActiveCN102604637ALow water solubility requirementAvoid hydrolysisBiological testingLuminescent compositionsN dimethylformamideAmide bonds
The invention discloses a preparation method of biotin-modified and rare earth-doped inorganic fluorescent nanoparticles. The method comprises the following steps: activating the carboxyl groups of biotin in a solvent of anhydrous N,N-dimethylformamide with benzotriazole-N,N,N',N'-tetramethylurea hexafluorophosphate (HBTU) and N,N-diisopropylethylamine (DIEA) as activators, reacting the activated carboxyl group with the amino groups of the nanoparticles to form amide bonds so as to achieve biotin modification on the surface of rare earth-doped inorganic fluorescent nanoparticles. The biotin-modified and rare earth-doped inorganic fluorescent nanoparticles prepared with the method provided by the invention can quickly and stably bind with avidins, and the specific luminescence of rare earth ions doped in the nanoparticles can give sensitive response to the binding, which indicates that the nano materials obtained by the preparation method have potentials of applications in the fields of biological labeling and immunological analysis.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
Preparation process of thiatro bromoaminium anhydrous compound
An anhydrous tiotropium bromide is prepared from scopolamine hydrobromate. Its preparing process is also disclosed.
Owner:HONGYI SCI & TECH CO LTD NANCHANG
Method for preparing aluminum-scandium intermediate alloy by thermally reducing aluminum in elpasolite fused salt
The invention discloses a method for preparing an aluminum-scandium intermediate alloy by thermally reducing aluminum in elpasolite fused salt and belongs to the technical field of materials. The method comprises the following steps: (1) mixing anhydrous KF and anhydrous AlF3; (2) adding Sc2O3 and uniformly mixing; (3) increasing the temperature of mixed salt to 720-1020 DEG C, and maintaining temperature for 30-60 minutes; and (4) adding reducer metal aluminum, thermally reducing at the temperature of 720-1020 DEG C, separating an alloy part and an electrolyte part, condensing the alloy part and then forming the aluminum-scandium intermediate alloy. An electrolyte system adopted by the method is high in solubility of KF-AlF3; the content of Sc in the prepared Al-Sc intermediate alloy meets the requirement of the national standard; low-cost scandium oxide is used as the raw material; the process is simple; the preparation process of the aluminum-scandium intermediate alloy is shortened; the production cost is reduced.
Owner:NORTHEASTERN UNIV
Anhydrous nano automobile cleaning care agent
InactiveCN106479701AGood effectAvoid damageInorganic/elemental detergent compounding agentsNon-ionic surface-active compoundsAlcoholUltraviolet lights
The invention provides an anhydrous nano automobile cleaning care agent. The anhydrous nano automobile cleaning care agent is prepared from, by weight, 1-80 parts of carnauba wax, 1-90 parts of silicone oil, 1-100 parts of surfactant, 2-25 parts of ultraviolet light absorber, 1-10 parts of filler, 10-30 parts of deionized water and 0.1-0.6 part of ethyl alcohol. The automobile care agent which is free of toxins and harm, environmentally friendly and rapidly permeable, and has an excellent effect of removing residues on the surface of an automobile after snow and rain is provided on the basis of the prior art. The anhydrous nano automobile cleaning care agent protects automobile paint while achieving the strong effect of removing dirt, scratches and other damage caused to the automobile paint in the wiping process are avoided, the surface of the automobile can be protected in a long-acting mode, and the novel automobile cleaning care agent has the excellent effect.
Owner:闪护(珠海横琴)科技有限公司
Anhydrous antiperspirant/deodorant stick compositions
An anhydrous antiperspirant / deodorant stick composition containing the following ingredients (A), (B), (C) and (D): (A) from 15 to 30 wt % of a higher alcohol having from 12 to carbon atoms, (B) a polypropylene glycol having an average molecular weight from 400 to 2,000, (C) a volatile cosmetic oil, and (D) an antiperspirant agent or deodorant agent.
Owner:KAO CORP
Preparation method of high-voltage-resistant solid polymer electrolyte
ActiveCN109301317AImprove high pressure performanceIncrease energy densitySolid electrolytesLi-accumulatorsPolymer scienceNanowire
A preparation method of a high-voltage-resistant solid polymer electrolyte includes the steps of: 1) according to certain ratio, dissolving a polymer substrate, lithium salt, and an inorganic additivein anhydrous acetonitrile and stirring the mixture at room temperature to obtain a uniform solution, wherein the polymer substrate is polyoxyethylene, the lithium salt is lithium bistrifluoromethylsulfonimide or lithium perchlorate; the inorganic additive is nano-wires or nano-particles of zinc borate, aluminum borate, sodium tetraborate, barium metaborate or calcium borate, the mass ratio of thepolyoxyethylene to the lithium salt EO : Li<+> is 10-20:1, and the mass of the inorganic additive is not more than 20% of the total mass of the polymer substrate and lithium salt; 2) pouring the solution into a polytetrafluoroethylene mold to volatilize the solution until completely dried, thus preparing the solid polymer electrolyte. The method improves the high-voltage resistance of the solid polymer electrolyte, so that the product fits a high-voltage ternary cathode material and energy density and safety of an all-solid-state battery are improved.
Owner:ZHEJIANG UNIV OF TECH
Anhydrous proton conductor based on heterocycle attached to a polymer backbone
ActiveUS20060159974A1Improve proton conductivityReduce leachingIon-exchanger regenerationFuel cell auxillariesElectrical conductorPolyphosphazene
The invention relates to proton-conducting polymers, including tetrazole-containing polymers. Proton-conducting membranes useful for fuel cell applications are formed from mixtures of a polymer with one or more non-aqueous proton sources. In representative examples of the present invention, tetrazole groups are attached to a polymer backbone such as polyphosphazene, the tetrazole groups interacting with the proton source.
Owner:TOYOTA MOTOR CO LTD
Adefovir dipivoxil anhydrous crystal, preparation method and medicine composition thereof
ActiveCN101054393AImprove liquidityEasy to prepareOrganic active ingredientsGroup 5/15 element organic compoundsDissolutionK-alpha
The invention relates to adefovir dipivoxil anhydrous crystallisate. It is characterized in that : XRD: radiating with Cu-k alpha , x ray powder diffraction spectrum expressed in 2 theta having characteristic absorption peak at 3.2,6.5,8.6, 15.7,19.6,21.6, DSC: DSC converting due to absorbing heat at 80 degree; infrared absorption spectrum : KBr pellet , characteristic absorption peak being at 3287cm-1,3175cm-1,1753cm-1,1254cm-1,1147 cm-1,1025cm-1,970cm-1. The present invention also discloses adefovir dipivoxil anhydrous crystallisate preparation method and its pharmaceutical composition. The inventive adefovir dipivoxil anhydrous crystallisate dissolves quicker than 102 degree crystal form, is high in dissolution, and is stable relative to 94 degree crystal form and not easy to be hygroscopic.
Owner:SHANGHAI SHYNDEC PHARMA CO LTD +2
Method of continuous evaporation crystallization and production method of anhydrous citric acid crystal
InactiveCN102553290AReduce polycrystallineFine granularityEvaporationSolution crystallizationEvaporationAnhydrous
The invention provides a method of continuous evaporation crystallization and a production method of anhydrous citric acid crystal. A crystallizer used in the method comprises a cavity; the method comprises pouring materials to be crystallized into the cavity continuously; carrying out evaporation crystallization to the materials to be crystallized under an evaporation crystallization condition; and discharging mixture with crystal during the evaporation crystallization process; the method is characterized in that the materials to be crystallized are added into the cavity along the inner wall of the cavity from the position higher than the liquid level in mode of liquid membrane partially or completely. With the method of the continuous evaporation crystallization, provided by the invention, the moisture content in the crystal is reduced and the anti-caking capacity of the crystal is improved. According to the method provided by the invention, the anhydrous citric acid seed crystal is added and lasted for a certain period during the production of the anhydrous citric acid crystal, the time of a crystallization system reaching the balance state is shortened greatly, and the particle diameter of the anhydrous citric acid crystal before the crystallization system reaches the balance state is enlarged.
Owner:COFCO BIOTECHNOLOGY CO LTD
Anhydrous citric acid crystal and production method thereof
InactiveCN102976925AReduce adhesionDoes not affect purityCarboxylic compound separation/purificationSlurryAnhydrous
The invention provides a production method of anhydrous citric acid crystal. The production method comprises the following steps in sequence: evaporating and crystallizing citric acid solution; and carrying out solid-liquid separation on the crystal size containing an anhydrous citric acid crystal, so as to obtain a wet anhydrous citric acid crystal, wherein the temperature of the wet anhydrous citric acid crystal which is obtained by separating under the solid-liquid separation condition is not less than X to 5 DEG C and higher than 36.6 DEG C, and X DEG C is the temperature of the crystal size to be treated by solid-liquid separation. The invention also provides the anhydrous citric acid crystal prepared by the production method provided by the invention. According to the production method provided by the invention, the adhesion of the anhydrous citric acid crystal can be obviously reduced while the purity of the anhydrous citric acid crystal is not influenced and the process is not increased.
Owner:COFCO BIOTECHNOLOGY CO LTD
Preparation process of thiatro bromoaminium anhydrous compound
Owner:HONGYI SCI & TECH CO LTD NANCHANG
Ice cream processed by PMF (palm-oil middle fractionation)-base composite grease and production method
The invention discloses ice cream processed by PMF (palm-oil middle fractionation)-base composite grease. The ice cream is processed by following raw materials including 6 parts of grease, 8 parts of dried trim milk, 13 parts of sucrose, 0.25 part of sucrose ester, 0.25 part of monostearin, 0.2 part of guar gum, 72.3 parts of water and a defined amount of fragrant essence. The grease is compounded by palm-oil middle fractionation matters (PMF), milk fat [AMF(anhydrous milk fat)] and palm stearin (ST) according to the proportion of 90:5:5. The ice cream and the production method have the advantages that the palm-oil middle fractionation matters (PMF) are used mainly, and are used as the grease for processing the ice cream after the palm-oil middle fractionation matters are compounded with the milk fat (AMF) and the palm stearin (ST) according to the scientific proportion, the physicochemical index of the compounded grease is closer to that of milk fat, when the ice cream is processed, cost is low, furthermore, the ice cream has fragrance of the milk fat, and the problem that taste of ice cream is not good enough when only a single palm oil product is used for processing the ice cream is resolved.
Owner:HENAN UNIVERSITY OF TECHNOLOGY
Nano composite adsorbent as well as preparation method and application thereof
ActiveCN109092258ASimple and fast manufacturing methodEasy to operateOther chemical processesRadioactive decontaminationSorbentDissolution
The invention provides a nano composite adsorbent as well as a preparation method and an application thereof. The preparation method comprises the following steps: dispersing SWCNH into a nitric acidsolution for modification to obtain carboxylated SWCNH; catalyzing carboxylated SWCNH and p-phenylenediamine as reaction raw materials by a catalyst under protection of nitrogen to obtain SWCNH-NH2 nanofiller; mixing and stirring 3,3',4,4'-biphenyltetracarboxylic dianhydride with anhydrous N,N-dimethylacetamide until complete dissolution to obtain a solution I; adding the SWCNH-NH2 nanofiller to the solution I, and performing stirring in an ice-water mixture environment at 0 DEG C to obtain a solution II; adding p-phenylenediamine to the solution II, continuing to stir at a low temperature toenable reactants to be fully reacted, and finally obtaining a viscous pale yellow polyamic acid solution which is uniformly dispersed. The prepared PAA / SWCNH-NH2 nanocomposite adsorbent has high adsorption capacity for uranyl ions in an aqueous solution, high adsorption speed, good reusable effect and strong selective adsorption capacity for uranium ions, and can effectively adsorb and recover uranyl ions from the aqueous solution.
Owner:EAST CHINA UNIV OF TECH
Method for preparation and application of Cu(II) solid-phase extracting agent based on carbon nanotube
InactiveCN101811031AHigh adsorption selectivityWide pH rangeIon-exchange process apparatusOther chemical processesN dimethylformamideCarbon nanotube
The invention relates to a method for preparation and application of a Cu(II) solid-phase extracting agent based on a carbon nanotube. The preparation method comprises the following steps: refluxing 0.5-1g of carboxylated carbon nanotube and 20mL of anhydrous thionyl chloride for 1-2 day(s) at 60-90 DEG C, vacuum-filtering, washing the filtered residue with anhydrous tetrahydrofuran, and vacuum-drying the filtered residue for a night, thereby obtaining an acylated carbon nanotube; and dispersing the acylated carbon nanotube into mixed solution of 0.1g of 2,-2'-bipyridylamine, a mL of triethylamine and 100mL of anhydrous N, N-dimethylformamide, refluxing for 48 hours at 100 DEG C under the nitrogen atmosphere, vacuum-filtering, washing the filtered residue with absolute ethyl alcohol for three times, and then vacuum-drying for 1-2 day(s), thereby obtaining the Cu(II) solid-phase extracting agent based on the carbon nanotube. The application method comprises the following steps: filling 5-10mg of Cu(II) solid-phase extracting agent into a 6mL solid-phase extraction small column of a solid-phase extraction device, carrying out dynamic Cu(II) enrichment for 1-5mug / L of Cu(II)-containing water sample to be tested, and eluting and desorbing the solid-phase extracting agent rich in Cu(II) with 1-3M of dilute nitric acid, thereby recovering the Cu(II). The recovery rate of the Cu(II) reaches 97 percent, and the desorbed Cu(II) solid-phase extracting agent can be recycled for 4-5 times.
Owner:TONGJI UNIV
Preparation method of material used for treating wastewater containing aromatic nitro-compounds
InactiveCN101786685AEfficient removalPhysical/chemical process catalystsOther chemical processesCation-exchange capacityNitro compound
The invention discloses a preparation method of a material used for treating wastewater containing aromatic nitro-compounds. In the method, firstly, 10-15g of bentonite is crushed into 20-200 meshes and then can be dispersed in 25-30ml of acetone to prepare turbid liquid; then, anhydrous KCl and anhydrous FeCl3 are added into the turbid liquid, the total amount of the anhydrous KCl and the anhydrous FeCl3 is counted by the total amount of K+ and Fe3+ charges and is 10-100% of the total cationic exchange content of the bentonite, the proportion of the FeCl3 and the KCl is 1:2-1:4, the mixed solution is stirred for 4-6h, and the temperature during stirring is 10-30 DEG C; finally, the mixed solution is precipitated and separated, so that the precipitate turbid liquid is dried to obtain the water treatment material. The water treatment material prepared by the method can adsorb the aromatic nitro-compounds efficiently and can directly decompose the adsorbed organic pollutants into carbon dioxide, water and other harmless maters by adopting the Fe3+ catalytic action, and the water treatment agent after decomposition can be recycled.
Owner:JIANGSU POLYTECHNIC UNIVERSITY
Preparation method for adefovir dipivoxil ester waterless crystallization article, prepared adefovir dipivoxil ester waterless crystallization article and uses thereof
ActiveCN101343290AReduce manufacturing costImprove crystallization yieldOrganic active ingredientsGroup 5/15 element organic compoundsPropyl etherHepatitis B virus
Disclosed is a preparation method of an adefovir dipivoxil anhydrous crystal mass, the acquired adefovir dipivoxil anhydrous crystal mass as well as applications thereof, comprising the steps of: A. dissolving a crude product of adefovir dipivoxil with 95 percent ethanol; B. adding ether into a crystallization kettle, agitating the mixture and cooling the temperature to between 2 and 5 DEG C, adding the dissolved solution of adefovir dipivoxil acquired in the step A into the crystallization kettle, and agitating the mixture until reaching crystallization; and filtering the crystal mass, collecting a wet product of the crystal mass and then drying the wet product, wherein, the ether is one or more of iso-propyl ether, n-butyl ether and sec-butyl ether. The obtained crystallization yield reaches over 96 percent, and the crystal mass purity reaches above 99.5 percent. The adefovir dipivoxil anhydrous crystal mass is applied to the preparation of medicines for curing anti-hepatitis B viruses, and has good product activity.
Owner:STAR LAKE BIOSCI CO INC ZHAOQING GUANGDONG
Preparation method and application of omega-diamine derivatization beta-cyclodextrin bonded SBA-15 chiral stationary phase
InactiveCN103965484AHigh selectivityImprove the coordination effectOther chemical processesTosylhydrazoneSilica gel
The invention relates to a preparation method and an application of an omega-diamine derivatization beta-cyclodextrin bonded SBA-15 chiral stationary phase. The preparation method comprises steps as follows: 6-p-tosylation beta-cyclodextrin and omega-diamine are taken as raw materials, the omega-diamine is a solvent, and 6-(omega-diamine)-beta-cyclodextrin ligand is prepared through heating; the 6-(omega-diamine)-beta-cyclodextrin ligand and 3-isocyanato propyl siloxane react to prepare siloxane containing the 6-(omega-diamine)-beta-cyclodextrin ligand; anhydrous N,N-dimethyl formamide is taken as a solvent and heated under the protection of nitrogen, so that the siloxane containing the 6-(omega-diamine)-beta-cyclodextrin ligand reacts with a silanol hydroxyl group on the surface of SBA-15 silica gel, and a coarse product is obtained; and redundant ligand and impurities in holes are cleared, and a final product is obtained. The preparation method is simple, convenient, lower in cost, wide in application and suitable for rapidly preparing the chiral stationary phase.
Owner:NANCHANG UNIV
9,9<,>-bisanthracene derivative and preparation method thereof
InactiveCN102225881AHigh fluorescence quantum efficiencyHydrocarbonsLuminescent compositionsSodium bicarbonateUltrasonic radiation
The invention discloses a 9,9<,>- bisanthracene derivative having the following structural formula shown in the description, wherein, R is hydrogen, ethyl, propyl or 4-propyl cyclohexyl. The invention also discloses a preparation method of the 9,9<,>- bisanthracene derivative, comprising the following steps: (1) adding magnesium powder, bromo aromatic hydrocarbon, tributyl borate in anhydrous tetrahydrofuran, for an ultrasonic radiation reaction for 1h at the temperature of 40 DEG C to obtain aryl boric acid, wherein, the molar ratio of bromo aromatic hydrocarbon to tributyl borate to magnesium powder is 1:2:3; and (2) adding 10,10<,>-dibromo-9,9<,>- bisanthracene, aryl boric acid and tetra(triphenylphosphine) palladium in a solution containing toluene, ethanol and sodium bicarbonate, wherein, the volume ratio of toluene to ethanol to sodium bicarbonate is 4:2:1, the molar ratio of 10,10<,>-dibromo-9,9<,>- bisanthracene to aryl boric acid is 2.5 :1, the amount of tetra(triphenylphosphine) palladium is 10% of the amount of 10,10<,>-dibromo-9,9<,>- bisanthracene compound, then reversing flow to obtain the 9,9<,>-bisanthracene derivative.
Owner:XIAN MODERN CHEM RES INST
Preparation method of high-quality anhydrous rare earth chloride and bromide
InactiveCN110540227AImprove qualityHigh absolute purityRare earth metal compoundsRare-earth elementDistillation
The invention provides a preparation method of high-quality anhydrous rare earth chloride and bromide. The preparation method comprises the following steps: (1) carrying out pre-dehydration on the rare earth halide REX<3>-xH<2>O to obtain crude anhydrous REX<3>, wherein X is elemental Br and / or Cl, RE is any one rare earth element or two or more rare earth elements consisting of Y, Sc, La, Ce, Pr,Nd, Sm, Pm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, and x is no less than 0 and no more than 7; (2) vacuumizing the crude anhydrous REX<3> obtained in the step (1) under water-isolated and oxygen-isolated conditions; and (3) carrying out gradient heating on a system formed in the step (2) in a plurality of stages from 200-1500 DEG C, and carrying out distillation purification on the target objectREX<3> to obtain the high-purity anhydrous REX<3> with the absolute purity of more than or equal to 99.99%. According to the preparation method of the high-quality anhydrous rare earth chloride and bromide, different substances in a material are separated through process control, so the anhydrous rare earth halide with extremely high absolute purity is obtained; and the preparation method is relatively low in process cost, and easy for industrial production.
Owner:TIANJIN BAOGANG RES INST OF RARE EARTHS
Mass production method for 4-chloro-2'-cyanobiphenyl
InactiveCN106117084AHigh yieldSimple post-processingCarboxylic acid nitrile preparationOrganic compound preparationFiltrationGrignard reagent
The invention discloses a mass production method for 4-chloro-2'-cyanobiphenyl. The mass production method comprises the following steps: para chlorobromobenzene and magnesium chips in a mole ratio being (1:1)-(1:5) are added to anhydrous tetrahydrofuran for a reaction under protection of nitrogen, and a Grignard reagent is prepared; 2-chlorobenzonitrile, a manganese compound catalyst and anhydrous tetrahydrofuran are mixed, then the Grignard reagent is added slowly to the mixture for a reaction, tetrahydrofuran is recovered after the reaction through filtration and desolvation, toluene is added, the pH value is regulated with an acid to be 1-5, an organic phase is separated out, the solvent is removed, and 4-chloro-2'-cyanobiphenyl is obtained. The raw materials are cheap and easily available, the total yield is higher, aftertreatment is simpler, and less pollution is caused.
Owner:JIANGSU FLAG CHEM IND
Synthetic method of 2-(7-methoxyl-1-naphthyl) ethylamine hydrochloride
InactiveCN103113243ASimple stepsHigh reaction yieldOrganic compound preparationAmino-hyroxy compound preparationCyanoacetic acidDehydrogenation
The invention relates to a synthetic method of 2-(7-methoxyl-1-naphthyl) ethylamine hydrochloride. The method comprises the following steps of: reacting 7-methoxyl-1-naphthyl (a compound IV) with cyanoacetic acid to prepare (7-methoxyl-3,4-dihydro-1-naphthyl) acetonitrile (a compound III); performing deep drawing quality (DDQ) dehydrogenation to prepare (7-methoxyl-1-naphthyl) acetonitrile; using sodium borohydride as a reducing agent and reacting sodium borohydride with calcium chloride in anhydrous tetrahydrofuran to react to obtain 2-(7-methoxyl-1-naphthyl) ethylamine; and satisfying with hydrochloric acid to obtain a compound I, wherein the compound is an important intermediate of synthetic agomelatine.
Owner:SHANDONG FANGMING PHARMACEUTICAL CO LTD
Supercritical co2 anhydrous rotary warp beam horizontal dyeing kettle and its dyeing system
ActiveCN103806234BIncrease contact timeReduce the effects of uneven dyeingTextile treatment containersTextile treatment machine arrangementsEngineeringAnhydrous
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
Anhydrous ammonia vapor charge unit for an applicator tank
ActiveUS9901027B1Direct liquid fertiliser deliverySteam generation using hot heat carriersGas compressorProduct gas
An anhydrous ammonia vapor charge unit for an applicator tank maintains a pressure charge on an applicator tank. A secondary anhydrous ammonia tank is disposed adjacent to the applicator tank. Ammonia vapor from the secondary tank is passed through a vapor compressor and then is injected into the applicator tank to provide a greater pressure charge within the applicator tank. In a second embodiment, a small portion of a liquid flow stream of ammonia being removed from the applicator tank is separated from the flow stream, passed through a heat vaporizer for expanding from a liquid to a gas, passed through a vapor pressure, and then is injected into the applicator tank for maintaining the pressure charge on the applicator tank. Preferably the heat vaporizer used hydraulic fluid from a tractor to heat the anhydrous ammonia.
Owner:CONTINENTAL NH3 PROD CO
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