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39results about How to "Has the prospect of industrialization" patented technology
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Preparation method and use of micromolecule water reducer with delayed coagulation and slump retaining properties
ActiveCN108239279AImprove adsorption capacityImprove environmental adaptabilityPhosphorous acidMannich reaction
The invention provides a preparation method and use of a micromolecule water reducer with delayed coagulation and slump retaining properties. The preparation method has the beneficial effects that a preparation method is strong in adjustability and high in cost performance, a preparation process is simple, the prepared micromolecule water reducer has excellent slump retaining property, delayed coagulation property and clay tolerance. The preparation method comprises the following steps: (1) carrying out amination reaction: carrying out C=C double bond Michael addition reaction by virtue of organic amine with a specific structure and unsaturated carboxylate with a specific structure, and purifying, so as to obtain an organic amine intermediate with an amino hydrogen and carboxylic ester group structure; (2) carrying out Mannich reaction by virtue of the organic amine intermediate, formaldehyde and phosphorous acid, and purifying, so as to obtain phosphorylated organic amine intermediate; and (3) carrying out condensation reaction by virtue of carboxyl of the phosphorylated organic amine intermediate and polyether with a specific structure and a terminal OH or a terminal NH2 so as toconvert carboxyl into an ester group or acylamino, and alkalizing for neutralization so as to obtain the micromolecule water reducer with the delayed coagulation and slump retaining properties.
Owner:JIANGSU SOBUTE NEW MATERIALS +1
High-temperature-resistant phosphono-containing concrete retarder and preparation method thereof
The invention provides a high-temperature-resistant phosphono-containing concrete retarder and a preparation method thereof. The phosphono-containing concrete retarder has the advantages of high temperature resistance and excellent setting retarding effects, can enhance the adaptability of a polycarboxylic acid water reducing agent to machine-made sand and low-activity admixtures, lowers the sensitivity to cement, temperature and water consumption, and enhances the sulfate and clay tolerance. Under the synergic action of the polycarboxylic acid water reducing agent, the concrete retarder obviously improves the concrete workability, and is suitable for preparing concrete under harsh working conditions, such as low sandstone material quality, high-temperature environment, long-time transportation and the like. The preparation technique is simple, and has high feasibility for industrial production and broad market application space. The concrete retarder has important technical support effects on promoting the market application of the polycarboxylic acid water reducing agent and enhancing the rheological properties, mechanical properties and durability of the concrete.
Owner:JIANGSU SOBUTE NEW MATERIALS +1
Special multi-phosphono-containing admixture for medium/low-slump concrete and preparation method thereof
The invention discloses a special admixture for medium / low-slump concrete. The special admixture for medium / low-slump concrete is a multi-branched-chain three-dimensional-structure low-molecular-weight compound, wherein the molecule central core is provided with 3-8 alkoxy groups, and each alkoxy group is connected with an adsorption functional group through a molecule connecting arm; the molecule connecting arms and adsorption functional groups are branched chains; each molecule connecting arm is in a polyoxyalkylene ether structure; the number of the branched chains is 3-8; and each adsorption functional group is a multiphosphate or multi-phosphorous acid. The raw materials of the special admixture for medium / low-slump concrete are easy to purchase, and the technique is simple and feasible; and thus, the special admixture for medium / low-slump concrete smoothly satisfies the demand of long slump retaining time (6 hours or above) for concrete under harsh conditions (such as high temperature, super-long-distance super-long-time transportation and the like), has low sensitivity to cement, sandstone aggregate and water consumption, has high sulfate and clay interference resistance, effectively enhances the early strength of the concrete, can implement long slump retaining time of medium / low-slump concrete, and improves the workability.
Owner:JIANGSU SOBUTE NEW MATERIALS +1
Preparation method and application of mixed matrix membrane containing MOF filler
InactiveCN110449034AEnhanced interactionEvenly dispersedSemi-permeable membranesGas treatmentPolymerMetal
The invention relates to a preparation method and application of a mixed matrix membrane containing MOF filler. The method provided by the invention adopts a metal organic frame material MOFs as the filler, takes a glassy polymer as the organic membrane material, and uses a solution mixing process to prepare the mixed matrix membrane (MMMs). The MOF material containing organic ligand has good combination with the polymer, thus avoiding defects. The prepared mixed matrix membrane has good application prospects.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Method for preparing cyclopentanone
ActiveCN108863738APrevent adhesionHigh selectivityMetal/metal-oxides/metal-hydroxide catalystsPreparation from heterocyclic compoundsHydrogenReaction temperature
The invention provides a method for preparing cyclopentanone. The method comprises the following steps: enabling furfural to be subjected to hydroisomerization under the conditions of certain reactiontemperature and reaction pressure in presence of hydrogen, carbon dioxide and a catalyst so as to obtain the cyclopentanone. A mixture of water and an oxygen-containing heterocyclic compound is preferentially used as a solvent in a reaction. According to the method provided by the invention, the selectivity of the cyclopentanone is improved, the adhesion of the furfural and / or furfuryl alcohol tothe surface of the catalyst is avoided, and the service life of the catalyst is prolonged.
Owner:WANHUA CHEM GRP CO LTD
Method for preparing graphene
ActiveCN102765717BEfficient strippingQuality improvementGrapheneBulk chemical productionPresent methodSolvent
Disclosed is a method for preparing graphene. In particular, the method comprises: using n-hexane or propane as a supercritical solvent, filling graphite powder or graphite powder and a cosolvent into an autoclave, sealing the autoclave by selecting an appropriate rupture disk, adding n-hexane or propane after the autoclave is vacuumized, keeping in a supercritical state for a period of time at a temperature and a pressure, then increasing the temperature and the pressure slightly or increasing the pressure alone,, and a collector collecting rushed-out materials instantly for treatment to prepare a graphene product after the rupture disk bursts when the pressure exceeds the pressure which the rupture disk can bear. In the present method, pressure relief occurs in milliseconds, and thereby efficient strip of graphite can be achieved. The method belongs to a physical process, does not cause large damage on the structure of graphene, is simple in the preparation process, does not require a large quantity of inorganic acids and oxidants, and is free of "three wastes". The prepared graphene crystal is intact in structure, good in quality, and capable of achieving large-scale industrial production of graphene.
Owner:余美群
Phosphonic acid-based block polymer, and preparation method and application thereof
Owner:JIANGSU SOBUTE NEW MATERIALS +1
Preparation method of diisocaprylic acid tin oxide complex
InactiveCN111499661AEasy to prepareHas the prospect of industrializationTin organic compoundsElectro-spinningPtru catalystPhysical chemistry
The invention relates to the field of fine chemical engineering, in particular to a preparation method of a diisocaprylic acid tin oxide complex. The preparation method of the diisooctanoic acid tin oxide complex is simple and has industrial prospects; the prepared diisooctanoic acid tin oxide complex has catalytic esterification capacity and can be used as a heterogeneous catalyst, and various catalytic esterification indexes of the diisooctanoic acid tin oxide complex are equivalent to those of stannous octoate. The product as an esterification reaction catalyst can be separated from the product through filtration after the reaction is finished, no wastewater is generated, and the separated catalyst can be repeatedly used, so that the pollution is avoided, and the economy is improved.
Owner:PANJIN HONGDING CHEM CO LTD
Preparation method of D2 structure hexafluoropropylene dimer with high reaction activity
InactiveCN111056914AHigh reactivityEasy to prepareOrganic-compounds/hydrides/coordination-complexes catalystsHalogenated hydrocarbon preparationDimerPolymer science
The invention relates to the field of fine chemical engineering, in particular to a preparation method of a D2 structure hexafluoropropylene dimer with high reaction activity. The preparation method is simple, the preparation method comprises the following steps: firstly, preparing hexafluoropropylene into a hexafluoropropylene dimer of which the D2 content is greater than 70% under the action ofan oligomerization catalyst and a structural isomerization auxiliary agent; secondly, promoting the conversion of the hexafluoropropylene dimer of the D1 structure to the hexafluoropropylene dimer ofthe D2 structure by using metal fluoride and a structural isomerization additive through a heating and pressurizing reaction in the first step to prepare the high-reaction-activity D2 structure hexafluoropropylene dimer of which the content of the D2 structure hexafluoropropylene dimer is greater than 95%. The method is simple and feasible, is low in cost, and has a good industrial prospect.
Owner:ZHEJIANG JUHUA HANZHENG NEW MATERIAL
Alpha-sulfonic acid-beta-diimine nickel complex, preparation method and application of alpha-sulfonic acid-beta-diimine nickel complex in catalyzing olefin polymerization
ActiveCN112538098AImprove performanceImprove bindingOrganic chemistry methodsNickel organic compoundsPolymer sciencePolyolefin
The invention discloses an alpha-sulfonic acid-beta-diimine nickel complex, a preparation method and application of the alpha-sulfonic acid-beta-diimine nickel complex in catalyzing olefin polymerization. The invention provides the alpha-sulfonic acid-beta-diimine nickel complex. The invention also provides a preparation method of the alpha-sulfonic acid-beta-diimine nickel complex and applicationof the alpha-sulfonic acid-beta-diimine nickel complex in catalyzing olefin polymerization. The alpha-sulfonic acid-beta-diimine nickel complex provided by the invention can be used as a main catalyst to catalyze olefin polymerization in a catalyst system formed by the alpha-sulfonic acid-beta-diimine nickel complex. The catalyst shows excellent temperature resistance, can be used for preparing apolymer with high molecular weight and narrow distribution, has excellent polar monomer tolerance, and can be used for preparing a high molecular weight olefin copolymer with relatively high polar group content, so that a polyolefin material with high performance is prepared.
Owner:链行走新材料科技(广州)有限公司
Method for preparing high-specific surface area tin dioxide catalyst by using mesoporous silicon dioxide as hard template
ActiveCN107138147AShort synthesis timeLow costGas treatmentDispersed particle separationTin dioxideMicrowave method
The invention discloses a method for preparing a high-specific surface area tin dioxide catalyst by using mesoporous silicon dioxide as a hard template. By a microwave method, the high-specific surface area tin dioxide catalyst is synthesized by using KCC-1 mesoporous silicon dioxide as the hard template. Under the conditions that the pressure is atmospheric pressure, reaction gas comprises methylbenzene with the concentration of 500-1000ppm, O2 (with the concentration of 20-40%) and N2 balance gas and the air speed is 20, 000mL / (gh), the esoporous silicon dioxide is used as the hard template and the catalyst is synthesized by the microwave method; the initial temperature of methylbenzene conversion is greatly reduced, and the SnO2-KCC-1-Ultra-OH catalyst can enable the methylbenzene conversion rate to reach 98% at 340 DEG C. By the microwave method for synthesizing the catalyst, steps are less, operation is simple and the synthesis time is greatly shortened, and a variety of used raw materials and a used solvent are environment-friendly, so that the method has a practical value.
Owner:NANCHANG UNIV
Phosphonic acid-based polymer with strong adaptability and slump retention properties and its preparation method and application
ActiveCN107337765BSimple manufacturing processReduce processing requirementsPolymer scienceSide chain
The invention discloses a phosphonate-base polymer with high adaptability and slump retaining properties, and a preparation method and application thereof. The phosphonate-base polymer has the following structural characteristics: the side chain is an ether type chain segment; and the polymer has two stages of adsorption groups, the primary adsorption group is a phosphonate or phosphite functional group, the secondary adsorption group is carboxyl, and the two functional groups are connected by an ester bond or amido bond. The weight average molecular weight of the phosphonate-base polymer with high adaptability and slump retaining properties is 10000-50000. The phosphonate-base polymer has a novel molecular structure, and thus, has the advantages of low doping amount, high water reducing rate, excellent slump retaining properties, and high sulfate and clay interference resistance. The preparation technique can implement industrialization, and thus, has broad market application space.
Owner:JIANGSU SOBUTE NEW MATERIALS +2
Cement slurry thickener and preparation method and application thereof
The invention provides a cement slurry thickener, a preparation method and application thereof; the cement slurry thickener, according to the mass fraction, comprises 4% to 5% of graphene oxide, 1 to6% of polypropylene fluoride , 1 to 5% of methylpyrrolidone and the balance being water. The cement slurry thickener utilizes graphene oxide as the main viscosity regulator, the graphene oxide has a huge specific surface area and a large number of oxygen-containing functional groups, which can provide a large number of hydration sites, accelerate the early hydration rate of cement, and graphene oxide foil can be inserted between cement solid particles, ultra-thin two-dimensional structure and large number of oxygen-containing functional groups of the graphene oxide foil coat and even bond hydrated and unhydrated cement particles to change the rheology of the cement slurry, thereby increasing the consistency of the cement slurry, and further improving the bleeding phenomenon of cement slurry.
Owner:WUHAN UNIV OF TECH
Wet zinc metallurgical ultrasound purification method, device and use
InactiveCN101392328BImprove stabilityHas the prospect of industrializationPurification methodsCopper
The invention relates to an ultrasonic purification method for wet zinc smelting, and a device and application thereof. In the ultrasonic purification device for wet zinc smelting, an ultrasonic field produced by ultrasonic waves is adopted to carry out irreversible ultrasonic irradiation to wet zinc smelting solution to be purified, which causes the concentration of ionic impurities to be decreased irreversibly so as to realize the purpose of removing impurities. The application of the method can realize quick purification of required standards, greatly decreases the consumption of zinc powder, directly produces high-quality copper residue, cadmium residue and cobalt residue, and also is applicable to the treatment of the copper-cadmium residue and cobalt-nickel residue produced by wet zinc smelting purification previously.
Owner:XINGMIN TECH ZHUZHOU
Method for preparing hexyl-didecyl phosphorus oxide
InactiveCN108610373AHigh purityThe reaction steps are simpleGroup 5/15 element organic compoundsRotary evaporatorDi-tert-butyl peroxide
The invention discloses a method for preparing hexyl-didecyl phosphorus oxide. The method comprises the following steps: adding didecyl phosphorus oxide, 1-hexene and di-tert-butyl peroxide in a PTFE(Polytetrafluoroethylene) reaction kettle, adding a small amount of industrial mixed decene, stirring and dissolving, rising the temperature to be 130 to 140 DEG C, reacting for 12 to 36 hours, detecting and completely reacting under <31>P-NMR (Nuclear Magnetic Resonance), adding 5 to 15 weight percent of diluted hydrochloric acid in a reaction solution for carrying out demulsifying and washing, extracting by using trichloromethane, washing an organic layer to be neutral by using water, evaporating to remove trichloromethane and unreacted olefin through a rotary evaporator, recrystalizing by using ethanol, filtering, and carrying out vacuum drying, thus obtaining white solid. The method for preparing hexyl-didecyl phosphorus oxide, disclosed by the invention, is simple in steps, is green and environmentally friendly and is good in atom economy, a product is high in purity, separation is easy, and an industrial prospect is obtained; the product is applied to industries of water qualitydetection and sewage treatment.
Owner:四川中环检测有限公司
A kind of cement slurry thickener and its preparation method and application
The invention provides a cement slurry thickener and its preparation method and application. The cement slurry thickener, in terms of mass fraction, includes components: 4% to 5% graphene oxide, 1 to 6% polypropylene , 1 to 5% methyl pyrrolidone, the balance is water. The cement slurry thickener of the present invention uses graphene oxide as the main regulator of cement slurry viscosity. Because graphene oxide has a huge specific surface area and a large number of oxygen-containing functional groups, it can provide a large number of hydration sites and speed up the process of cement paste. Early hydration rate, and the graphene oxide foil can be interspersed with cement solid particles, its ultra-thin two-dimensional structure and a large number of oxygen-containing functional groups can wrap and even bond hydrated and unhydrated cement particles together , Change the rheology of the cement paste, thereby increasing the consistency of the cement paste, which in turn is beneficial to improve the bleeding phenomenon of the cement paste.
Owner:WUHAN UNIV OF TECH
A kind of α-sulfonic acid-β-diimine nickel complex, its preparation method and its application in catalytic olefin polymerization
ActiveCN112538098BImprove bindingImprove temperature resistanceOrganic chemistry methodsNickel organic compoundsPolymer sciencePolyolefin
The invention discloses an α-sulfonic acid-β-diimine nickel complex, a preparation method and its application in catalyzing olefin polymerization. The invention provides an α-sulfonic acid-β-diimine nickel complex. The invention also provides a preparation method of α-sulfonic acid-β-diimine nickel complex and its application in catalyzing olefin polymerization. In the catalyst system formed by the α-sulfonic acid-β-diimine nickel complex provided by the invention, it can be used as a main catalyst to catalyze olefin polymerization. The catalyst not only shows excellent temperature resistance, can prepare polymers with high molecular weight and narrow distribution, but also has excellent tolerance to polar monomers, and can prepare high molecular weight olefin copolymers with high polar group content, Thus, a high-performance polyolefin material is prepared.
Owner:链行走新材料科技(广州)有限公司
Double enzyme coupling preparation of ornithine hydrochloride
InactiveCN101348808BProcess control stabilityFew reaction stepsHydrolasesFermentationCouplingReagent
The invention relates to a method for preparing ornithine hydrochloride, in particular to a double-enzyme coupling method for preparing the ornithine hydrochloride. The invention provides an economic and environment-friendly double-enzyme coupling method for preparing the ornithine hydrochloride. The method fully utilizes biological enzymes to prepare the product of the ornithine hydrochloride and is distinguished from the most production methods which depend on chemical reagent too much in the prior art. The method adopts urease extracted from fresh soybeans and bovine liver enzyme solution extracted from fresh bovine livers to prepare the ornithine hydrochloride.
Owner:NINGBO ZHENHAI HAIDE BIOCHEM
Method for preparing didecyl phosphine oxide
InactiveCN108610374AHigh purityThe reaction steps are simpleGroup 5/15 element organic compoundsAcetic acidRotary evaporator
The invention discloses a method for preparing didecyl phosphine oxide. The method comprises the following steps: adding distilled water in didecyl phosphine oxide under room temperature, stirring andhydrolyzing for 10 to 30 minutes, regulating PH (Potential of Hydrogen) to be greater than 13 by using 5 to 15 weight percent of NaOH solution, extracting by using trichloromethane, taking an organiclayer, washing to be neutral by using the distilled water, evaporating to remove a solvent in the organic layer through a rotary evaporator, dissolving by using acetic acid, filtering, and discardingfilter residue; adding trichloromethane and the distilled water for extracting filtrate, collecting the organic layer, washing to be neutral by using the distilled water, and carrying out vacuum drying, thus obtaining white solid. The method for preparing didecyl phosphine oxide, disclosed by the invention, is simple in steps, is green and environmentally friendly and is good in atom economy, a product is high in purity, separation is easy, and an industrial prospect is obtained; the product is applied to industries of water quality detection and sewage treatment.
Owner:四川中环检测有限公司
Polyphosphate compound as well as preparation method and application thereof
The invention discloses a polybasic phosphate compound as well as a preparation method and application thereof. According to the polybasic phosphate compound, phytic acid serves as a core, six phosphate functional groups on the periphery of a six-membered ring are respectively grafted with 1-6 polyether side chains, the polyether side chains are connected with the phytic acid through phosphate ester bonds, the molecular form of the compound is linear or star-shaped, and adsorption groups are exposed phosphate monoester and phosphate diester; the number of functional groups of the phosphomonoester is 1-6, and the number of functional groups of the phosphodiester is 1-6. The polybasic phosphate compound provided by the invention can regulate concrete bubbles and bubble stability, promote initial dispersion, reduce the sensitivity of concrete to cement, gravel aggregate and water consumption, enhance the sulfate and clay interference resistance, and enhance the strength and durability of concrete. The method is simple in preparation process, high in industrial production feasibility and wide in market application space.
Owner:SOUTHEAST UNIV +3
N-heterocycl-1, 5-disubstituted-4-pyrazolecarboxamide compound and application thereof
PendingCN114751889AHigh antibacterial activityImprove protectionBiocideOrganic chemistryBiotechnologyRice plants
The invention discloses an N-heterocycl-1, 5-disubstituted-4-pyrazolecarboxamide compound, which is characterized in that the structural formula of the N-heterocycl-1, 5-disubstituted-4-pyrazolecarboxamide compound is shown in the specification, wherein R1 is methyl, monochloromethyl, difluoromethyl, trifluoromethyl or trichloromethyl; r2 is isopropyl, tertiary butyl, cyclohexyl, phenyl or o-substituted phenyl; r < 3 > is 4-pyridyl, 2-substituted-4-pyridyl, 3-thienyl or 2-substituted-3-thienyl. The formula (I) is shown in the description. The compounds not only have excellent activity on fusarium graminearum and rice black fungus which cause fungal diseases of rice, but also have good bacteriostatic activity on various plant pathogens by part of the compounds, and have obvious broad-spectrum activity. In addition, part of the compounds show excellent protection and treatment activity on corn plants infected by fusarium graminearum pathogenic bacteria and rice plants infected by rice black fungus pathogenic bacteria.
Owner:GUIZHOU UNIV
Method for preparing trioctylphosphine oxide by hydrolysis addition
InactiveCN108610371AHigh purityThe reaction steps are simpleGroup 5/15 element organic compounds1-OcteneRotary evaporator
The invention discloses a method for preparing trioctylphosphine oxide by hydrolysis addition. The method comprises the following steps: adding dioctylphosphine oxide, 1-octene, an acetic acid solventand di-tert-butyl peroxide into a polytetrafluoro reactor, adding a small amount of industrial mixed decene, and performing stirring for dissolving; raising the temperature to 130-140 DEG C, performing reaction for 12-36 hours, and enabling the 31P-NMR detection reaction to be completed; adding 5-15wt% of dilute hydrochloric acid into the reaction liquid to perform demulsification washing, and performing extraction with trichloromethane; washing an organic layer to be neutral with water; removing trichloromethane and unreacted olefin by evaporation with a rotary evaporator; performing recrystallization with ethanol; and performing filtration and vacuum drying to obtain a white solid. The preparation method disclosed by the invention has the advantages that the reaction steps are simple and environmentally friendly, the atom economy is good, and the product is high in purity and easy to separate and has industrialized prospects. The obtained product is applied to water quality detection and sewage treatment industries.
Owner:四川中环检测有限公司
A kind of retarding type high-efficiency dispersant and preparation method thereof
ActiveCN105713207BImprove adsorption capacityImprove environmental adaptabilitySide chainLower grade
The invention discloses a set-retarding type efficient dispersant. The set-retarding type efficient dispersant is characterized in that a melamine derivative serves as a core, -PO3H2 and polyoxyalkylene side chains serve as the periphery and are independent from each other, but the periphery cannot be -PO3H2 or the polyoxyalkylene side chains completely simultaneously; the weight-average molecular weight of every polyoxyalkylene side chain ranges from 1,000 to 3,000, one terminal of every polyoxyalkylene side chain is exposed-OH while the other terminal thereof is unexposed fatty group or aromatic group, and every polyoxyalkylene side chain is prepared by direct oxyalkylation of corresponding fatty alcohol or aromatic alcohol. The set-retarding type efficient dispersant has a certain water reducing and slump retaining performance and remarkable set-retarding effect, and is highly adaptable to current low-grade concrete raw materials, strong in market demand, advanced in preparation technology and low in cost, thereby being promising in prospect and hopefully being developed into core technology of the concrete water reducing agent field to lead industry development.
Owner:JIANGSU SOBUTE NEW MATERIALS +1
Method for preparing carbon monoxide by electrochemically oxidizing graphite
ActiveCN113549934AThe method is simpleHas the prospect of industrializationElectrodesOxygen ionsElectrochemistry
The invention discloses a method for preparing carbon monoxide by electrochemically oxidizing graphite. The method comprises the following steps: applying voltage between a cathode and an anode of a ceramic membrane electrolytic tank to electrolyze oxygen-containing gas at the cathode of the ceramic membrane electrolytic tank to obtain oxygen ions, and transmitting the oxygen ions to the anode of the ceramic membrane electrolytic tank through the electrolyte of the ceramic membrane electrolytic tank; and oxidizing graphite at the anode of the ceramic membrane electrolytic tank to obtain gas containing carbon monoxide. The reactor irradiation graphite gasification rate is high, the reactor irradiation graphite gasification is carried out in a closed system, the reaction is easy to control, and innovativeness and social and economic benefits are achieved for treatment of retired reactor irradiation graphite.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
A method for treating propylene oxide high-COD alkaline wastewater by biochemical process
ActiveCN111170588BReduce contentReduce COD valueFatty/oily/floating substances removal devicesTreatment using aerobic processesIndustrial waste waterPulp and paper industry
Owner:辽宁中舟得水环保科技有限公司
Method for preparing dioctyl phosphorus chloride
InactiveCN108610370AHigh purityThe reaction steps are simpleGroup 5/15 element organic compoundsRotary evaporatorOrganic solvent
The invention discloses a method for preparing dioctyl phosphorus chloride. The method comprises the following steps: adding dioctyl phosphinic acid and trichlorosilane in a PTFE (Polytetrafluoroethylene) reaction kettle, wherein trichlorosilane is excessive; adding an organic solvent, stirring and dissolving, rising the temperature to be 60 to 100 DEG C, reacting for 6 to 24 hours, detecting andcompletely reacting under <31>P-NMR (Nuclear Magnetic Resonance), and evaporating to remove the organic solvent and residual trichlorosilane by a rotary evaporator, thus obtaining light green liquid-dioctyl phosphorus chloride. The method for preparing the dioctyl phosphorus chloride, disclosed by the invention, is simple in steps, is green and environmentally friendly and is good in atom economy,a product is high in purity, separation is easy, and an industrial prospect is obtained; the product is applied to industries of water quality detection and sewage treatment.
Owner:四川中环检测有限公司
Method for preparing dioctyl phosphine oxide
InactiveCN108218916AThe reaction steps are simpleGood atom economyGroup 5/15 element organic compoundsChemistrySewage treatment
The invention discloses a method for preparing dioctyl phosphine oxide. The method comprises the following steps: adding dioctyl phosphorus chloride into distilled water at room temperature, stirringand hydrolyzing for 10 to 30 minutes; adjusting with 5 to 15 weight percent of NaOH solution until a pH value is greater than 13; extracting with trichloromethane, taking an organic layer, and washingto neutral with the distilled water; evaporating by using a rotary evaporator to remove an organic layer solvent; dissolving with acetic acid, filtering and discarding filter residues; adding the trichloromethane and the distilled water; extracting filtrate and collecting an organic layer; and washing with the distilled water to neutral, and carrying out vacuum drying to obtain white solid. The preparation method disclosed by the invention has the advantages of simple reaction steps, greenness, environmental protection, high atom economy, high purity of a product, easiness in separation and industrial prospect. The product disclosed by the invention is applied to water quality detection and sewage treatment industry.
Owner:四川中环检测有限公司
A kind of method for preparing cyclopentanone
ActiveCN108863738BHigh yieldAvoid it happening againMetal/metal-oxides/metal-hydroxide catalystsPreparation from heterocyclic compoundsPtru catalystReaction temperature
The invention provides a method for preparing cyclopentanone. The method comprises the following steps: isomeric hydrogenation of furfural to cyclopentanone under the action of hydrogen, carbon dioxide and a catalyst under certain reaction temperature and reaction pressure conditions. The reaction preferably uses a mixture of water and an oxygen-containing heterocyclic compound as solvent. By adopting the method of the invention, the selectivity of cyclopentanone is improved, the adhesion of furfural and / or furfuryl alcohol polymer on the surface of the catalyst is avoided, and the service life of the catalyst is prolonged.
Owner:WANHUA CHEM GRP CO LTD
Special polybasic phosphoric acid-based admixture for medium and low slump concrete and preparation method thereof
The invention discloses a special admixture for medium / low-slump concrete. The special admixture for medium / low-slump concrete is a multi-branched-chain three-dimensional-structure low-molecular-weight compound, wherein the molecule central core is provided with 3-8 alkoxy groups, and each alkoxy group is connected with an adsorption functional group through a molecule connecting arm; the molecule connecting arms and adsorption functional groups are branched chains; each molecule connecting arm is in a polyoxyalkylene ether structure; the number of the branched chains is 3-8; and each adsorption functional group is a multiphosphate or multi-phosphorous acid. The raw materials of the special admixture for medium / low-slump concrete are easy to purchase, and the technique is simple and feasible; and thus, the special admixture for medium / low-slump concrete smoothly satisfies the demand of long slump retaining time (6 hours or above) for concrete under harsh conditions (such as high temperature, super-long-distance super-long-time transportation and the like), has low sensitivity to cement, sandstone aggregate and water consumption, has high sulfate and clay interference resistance, effectively enhances the early strength of the concrete, can implement long slump retaining time of medium / low-slump concrete, and improves the workability.
Owner:JIANGSU SOBUTE NEW MATERIALS +1
A kind of high temperature resistant phosphonic acid-based concrete retarder and its preparation method
Owner:JIANGSU SOBUTE NEW MATERIALS +1
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