202results about How to "No need to separate" patented technology

The invention provides a high temperature resistant Gemini cationic viscoelastic surfactant (VES) and a synthetic method thereof, relating to the field of oil recovery technology and engineering in the petroleum industry. The synthetic method is characterized by reacting unsaturated long-chain fatty acid with N,N-dimethyl propanediamine to synthesize a fatty acid amide intermediate; reacting methylamine with epichlorohydrin to synthesize a chloramine intermediate; reacting the intermediates synthesized in the two above steps respectively to synthesize the high temperature resistant Gemini cationic VES. The VES and the synthetic method have the beneficial effects that a high temperature surface active diverting acid system reacts with rocks at 160 DEG C, so that the liquid obviously diverts to become viscous and is subjected to automatic gel breaking under the condition that the hydrochloric acid concentration is below 5%, thus achieving rapid flowback; the VES has good temperature resistance, is relatively low in price and is beneficial for popularization and application.

The invention discloses a composite bacteria-algae preparation, which consists of nitrifying bacteria, bacillus licheniformis, scenedesmus obliqnus and selenastrum capricornutum, wherein the volume ratio of the nitrifying bacteria to the bacillus licheniformis to the scenedesmus obliqnus to the selenastrum capricornutum is 1-2: 1-3:1-3:1-3, and the microbe inoculation amount per milliliter is 8*106CFU. The composite bacteria-algae preparation also can be prepared into a globular immobilized preparation by adopting a known embedding method, using the nitrifying bacteria, the bacillus licheniformis, the scenedesmus obliqnus and the selenastrum capricornutum as embedding bacteria and using polyvinyl alcohol, sodium alginate, active carbon, silicon dioxide and calcium carbonate as embedding agents. The bacteria, algae and immobilization materials used by the composite bacteria-algae preparation have no toxic or side effect on aquaculture animals, and can effectively purify the aquaculture waste water; the bacteria and the algae can inhibit the growth of harmful pathogenic bacteria to a certain degree; an immobilization method has simple operation; the immobilized efficient bacteria-algae microbial bactericide is easy to store and transport; and the immobilization materials are economic and practical and easy to recycle.

The invention discloses a mixed rare earth compound-doped and modified lithium iron phosphate cathode material and a preparation method thereof, and belongs to the technical field of preparation of electrochemical power materials. In the cathode material, Fe-site doping is performed on a LiFePO4 cathode material by at least one rare earth element in a mixed rare earth compound; and the LiFePO4 cathode material is doped and modified by utilizing the mixed rare earth compound with low price by a solid-phase synthesis method. The process comprises the following steps of: adding a lithium source, a carbon source, a phosphorus source and a doped mixed rare earth compound into a dispersant agent for mixing and dispersing; preparing a precursor of a lithium iron phosphate material after wet-grinding, drying and crushing; performing secondary calcining on the precursor in an inert atmosphere; cooling to the room temperature; and crushing by ball-milling to obtain the LiFePO4 cathode material. The material and the preparation method have the advantages that: the prepared LiFePO4 cathode material does not need to separate rare earth elements; and the prepared material has the performance of high capacity, high electric conductivity, stable cycle life, and capacity of performing high-rate discharge.

The invention provides a method for preparing 2,5-furandicarboxylic acid by catalyzing fructose with a supported bifunctional catalyst. According to the method, a supported heteropolyacid salt is taken as a catalyst; and the catalyst disclosed by the invention is the bifunctional catalyst, and has acidity and catalytic oxidation performance. The fructose and biomass materials rich in the fructose can be efficiently catalyzed to dewater and prepare HMF; and meanwhile, 2,5-furandicarboxylic acid can be prepared by in-situ catalytic oxidation of the HMF at high selectivity. The catalyst is convenient to recycle and good in reusability, so that a foundation is laid for efficient preparation of the 2,5-furandicarboxylic acid.

The invention relates to a method for recovering the valuable metals in a waste nickel-cobalt-manganese-lithium ion battery by an ion exchange method, which comprises the following steps of disassembling, discharging and crushing the waste nickel-cobalt-manganese-lithium ion battery, leaching, replacing the leachate with nickel powder or cobalt powder to remove the copper, and hydrolyzing with a valuable metal alkali solution as a neutralizer to remove the iron and aluminum; regenerating the chelating resin with a lithium hydroxide solution, adsorbing the nickel, cobalt and manganese in the impurity-removed solution, and backwashing with sulfuric acid to obtain a nickel-cobalt-manganese mixed solution; and recovering the lithium in the liquid after resin adsorption in the form of lithium hydroxide. According to the method, the stripping and leaching of the waste nickel cobalt lithium manganate ion battery are completed in one step, the impurity elements are not introduced during the leachate impurity removal and valuable metal separation and extraction process, the lithium hydroxide used for ion exchange resin is regenerated via the lithium hydroxide, at the same time, the nickel-cobalt-manganese is absorbed, so that the lithium is prevented from being adsorbed and entering a nickel, cobalt and manganese solution to be lost, and the lithium recovery is prevented from being influenced due to the high sodium ion content in the solution with the sodium hydroxide. According to the present invention, the recovery rate of nickel, cobalt and manganese reaches 98% or above, the recovery rate of lithium reaches 90% or above, the technological process is short, the equipment is few, and the cost is low.

The invention relates to a green environment-friendly polyether carboxylic acid ester corrosion inhibition and scale inhibitor (APEL) and preparation method thereof. The corrosion and scale inhibitor is a phosphorus-free, nitrogen-free and biodegradable water treatment agent, which is applicable to industrial recirculated cooling water and is used for water quality corrosion inhibition and scale inhibition treatment. The corrosion inhibition scale inhibitor of the present invention is obtained by free radical copolymerization of polyether carboxylic acid ester reactive monomers and vinyl unsaturated double bond monomers, which comprise the following structural general formula: wherein A is monomer copolymerized constitutional repeating unit containing vinyl unsaturated double bond; R is Hor C1 to C5 low carbon alkyl; the degree of polymerization of x is 1 to 5000; the degree of polymerization of y is 1 to 5000; repeating unit amount of m is 1 to 100. The carboxylic acid ester corrosion inhibition and scale inhibitor has good compatibleness, can be used alone or in combination with other water treatment agents, like organic phosphate, zinc salt corrosion inhibitor.

The invention relates to a super-sensitivity method, primer group and kit for capturing whole genome of novel coronavirus. The method can conveniently and quickly amplify the whole genome of the novelcoronavirus by using a small amount of RNA, and can directly dock with a second-generation sequencing library-building reagent and a third-generation sequencing platform so as to obtain a whole genome sequence of the novel coronavirus.

The invention relates to a method for preparing high-purity isobutylene from a low-concentration tert-butanol aqueous solution. The method comprises the following steps: (1) firstly respectively filling catalyst sections arranged in the middle of a catalytic distillation tower with theta-ring packing; and sectioning the catalyst and filling each catalyst section with the catalyst; (2) introducing the tert-butanol aqueous solution and deionized water into the catalytic distillation tower; carrying out heating distillation on the tert-butanol aqueous solution by virtue of a tower bottom reboiler to form a tert-butanol-water azeotrope, dehydrating tert-butanol in the tert-butanol-water azeotrope by virtue of a catalyst layer to generate isobutylene, enabling unreacted tert-butanol to be absorbed by virtue of deionized water to reach the catalyst layer and further dehydrating to generate isobutylene; and (3) producing high-purity isobutene at the top and ionized water at the tower bottom. The method has the advantages of simplicity in operation flow, low cost and high conversion rate and selectivity and the produced isobutylene is high in purity and the preparation efficiency is high.

The present invention discloses a redox asymmetrical method for preparing L-phosphinothricin by biological multi-enzyme coupling. D, L-phosphinothricin is used as a raw material, the L-phosphinothricin is obtained through catalysis of an enzyme catalysis system, the enzyme catalysis system comprises a D-amino acid oxidase mutant for catalyzing D-phosphinothricin in the D, L-phosphinothricin into 2-carbonyl-4-[hydroxy (methyl) phosphonyl] butyric acid and a transaminase for catalyzing and reducing the 2-carbonyl-4-[hydroxy (methyl) phosphonyl ] butyric acid into the L-phosphinothricin, the D-amino acid oxidase mutant is obtained by mutation of D-amino acid oxidase in wild rhodotorula taiwanensis, and mutation sites are selected from one of the following four types: (1) M213S; (2) M213S-N54V-F58E; (3) M213S-N54V-F58E-D207A; and (4) M213S-N54V-F58E-D207A-S60T. The D-amino acid oxidase mutant has better catalytic efficiency, a conversion rate is far higher than that of wild enzyme when theracemic D, L-phosphinothricin is used as a substrate, and yield of PPO is also greatly improved.

The invention discloses a method of detecting the methylation of DNA. With high sensitivity and fast processing, the method provided by the invention can detect DAN with lower concentration and can conveniently detect low-level methylation of DNA without steps of separation and purification. Compared with the clinical histological method which has high demand onto samples, the invention only needs a little mount of DNA to sensitively detect the methylation level of tumor suppressor gene, thereby having significance in clinical diagnoses of early cancers.

An autonomous mobile robot for welding in narrow space comprises a robot body, a rotational scanning welding torch and a control system, wherein the robot body comprises a mobile robot chassis, a crosshead shoe adjusting device, a welding torch connecting device and a welding cable fixing device; by the rotational scanning welding torch, a welding gun rotates at constant speed and generates a sampling triggering signal for a controller in a welding process; the control system recognizes deviation of weld joints in the welding process according to current signals acquired by a Hall current sensor, and autonomously completes welding operation; the movement of the robot chassis and the movement of the crosshead shoe adjusting device are controlled; and a welding cable pipeline is reliably fixed on the robot body by the welding cable fixing device. The welding robot can flexibly move on a directing plane workpiece, is small in boundary dimension, and is particularly suitable for automatic welding in the narrow space.

The invention discloses an organic tanning agent for leather. The organic tanning agent comprises the following components of, by weight, 20-40 parts of cyanuric chloride and 10-20 parts of multiaminocompounds. When discharging of the organic tanning agent is completed, the appearance of the active chlorine organic tanning agent is yellow emulsion at normal temperature. The organic tanning agenthas stable shrinkage stability and is suitable for demands of most of tanning processes in the prior art.

The invention discloses a method for preparing a perfluorohexane surfactant serving as a main agent of an aqueous film-forming extinguishing agent directly. The method comprises the following steps of: performing ammonolysis reaction of perfluorohexane sulfuryl fluoride and diamine which serve as raw materials under the action of a catalyst to synthesize an amino sulfonamide compound without separation, and performing quaterisation reaction of the amino sulfonamide compound and chloroacetate to prepare a perfluorohexane betaine amphoteric surfactant which can be used for the aqueous film-forming extinguishing agent directly. The method has the characteristics of simple requirement on equipment, stable and convenient process, low energy consumption and no pollution; and the aqueous film-forming extinguishing agent prepared from the perfluorohexane betaine amphoteric surfactant serving as the main agent is short in fire control time and high in fire extinguishing efficiency, and all indexes reach the national standards of the industry.

The invention provides a method for detecting ochracin A based on the fluorescence anisotropy (fluorescence polarization) of a nucleic acid aptamer marked by a fluorescent dye tetramethylrhodamine (TMR for short). According to the method, the TMR is modified to a specific position of the aptamer of the ochracin A, the fluorescence anisotropy (fluorescence polarization) value of the TMR-marked nucleic acid aptamer is obviously changed due to the combination of the ochracin A, and the fluorescence anisotropy (fluorescence polarization) value is detected, so as to realize the quantitative detection of the ochracin A. The method has the advantages of simplicity and rapidness in operation, easiness in high throughput test, good specificity, high sensitivity and low cost.

The invention discloses a detection method of DNA single nucleotide polymorphism. The method which is provided by the invention uses a fluorescent substance for marking the DNA of a sample to be detected, and the nucleotide of the polymorphism site of the target single nucleotide of the DNA to be detected is determined by the fluorescence resonance energy transfer situation of the fluorescent substance and a water-soluble conjugated polymer. The invention has simple and convenient processing, which omits various separation and purification steps; the nucleotide of the polymorphism site of the single nucleotide can be detected by a small amount of DNA, thus the invention has great significance for the development of drugs and the clinical diagnosis of hereditary diseases.

The invention belongs to the technical field of gas-liquid two-phase measurement and relates to a gas-liquid two-phase flow swirl phase separation type capacitor moisture content measuring device. The device comprises a swirl phase separation unit and a capacitor measuring unit, wherein the swirl phase separation unit is located on the upper part of the device and comprises an outer pipe wall and spiral blades fixed in the outer pipe wall, and a space between the spiral blades and the outer pipe wall is named a first phase medium flow space; the capacitor measuring unit is located on the lower part of the device and comprises a metal pipe wall and an inner electrode, the metal pipe wall is taken as an outer electrode, the inner electrode is fixed in the metal pipe wall and externally covered with an insulating layer, a space between the metal pipe wall and the insulating layer is named a second phase medium flow space, and the two phase medium flow spaces are communicated with each other; and an opening connected with a fluid tangential inlet pipeline is formed in the outer pipe wall, the tangential angle of the fluid tangential inlet pipeline is the same as the spiral rising angles of the spiral blades, and therefore, fluid can enter the swirl phase separation unit along the tangential angle.

The invention relates to a preparation method of methyl phyenyl cyclosiloxane, aiming at solving the technical problem that the invention provides the preparation method of the methyl phenyl polysiloxane containing SiPhO1.5, namely TP under catalysis of alkali through thermal cracking. The particular steps are that: 1) polymethylphenyl sioxane containing TP is mixed evenly with catalysts (lithium hydroxide, potassium carbonate or sodium carbonate), and catalyst dosage is 0.1 to 10 percent of the polymethylphenyl sioxane dosage; 2) a low-boiling material condensed by the polymethylphenyl sioxane containing TP is removed under the vacuum and heating-up temperature of 200 to 250 DEG C; 3) the polymethylphenyl sioxane containing TP is cracked under high vacuum and highly heating-up temperature of 300 to 350 DEG C, thereby obtaining the product by collecting 250 to 290 DEG C / 2mmHg distillations.

The invention discloses a preparation method for organosilicon, in particular to a preparation method for hydrocyclosiloxane containing phenyl. The invention adopts the steps that dialkyl dichlorosilane and the mixture of methyl phenyl dichlorosilane produced through a thermal shrinkage method are uniformly mixed and slowly added into a water insoluble nonpolar organic solvent charged with water, and complete hydrolytic reaction is performed at 0 to 80 DEG C; an organic layer is taken out, and is washed through water to be neutral, the organic solvent is removed, and thus hydrolytic material is obtained; the hydrolytic material and a catalyst are then added into a reactor, the temperature is raised to be 250 to 300 DEG C gradually under the condition that the vacuum degree is not lower than 20 mmHg, the hydrocyclosiloxane is generated through cracking, and hydrocyclosiloxane mixture containing phenyl and dialkyl cyclic siloxane is obtained after condensation. The invention has the advantages of easy obtaining of raw material, and low cost, etc., thereby being widely applied to aviation and spaceflight, electronics, machinery, and other industries.

The invention discloses a portable cholesterol molecular imprinting silk-screen printing electrochemical tester and belongs to the technical field of rapid detection. A silk-screen printing electrode is polymerized with template molecule cholesterol by electroplating and a mixed solution of a purified sample and conductive liquid is dropwise added on the surface of a working electrode of the silk-screen printing electrode; current of cholesterol can be directly read by the portable cholesterol molecular imprinting silk-screen printing electrochemical tester; a standard curve is corrected according to a silk-screen printing electrode piece with the cholesterol with the standard concentration; and the concentration of the cholesterol in the detected sample is calculated by a built-in program. The tester disclosed by the invention has a simple structure, is portable, sensitive, rapid and accurate, has high specificity and is economical. The tester can be used for directly detecting the cholesterol, has the advantages of portability, sensitivity, rapidness, high specificity and the like, has low price and is suitable for detecting the cholesterol on a base layer or in the field.

An environment-friendly polyethyleneglycol multifunctional water treatment agent (namely PEGY) is prepared through free radical copolymerization of polyethyleneglycol carboxylic acid reaction monomers and monomers containing vinyl unsaturated double bonds. The structural formula of the environment-friendly polyethyleneglycol multifunctional water treatment agent figured as follows, wherein A represents a constitutional repeating unit formed after the polymerization of the monomers containing the vinyl unsaturated double bonds, the polymerization degree x is 1-5,000, the polymerization degree y is 1-5,000, the polymerization degree z is 1-5,000, the polymerization degree z is 1-5,000, and the number m of repeating units is 3-1000.

The invention relates to a flame retardant, in particular to a phosphorus-nitrogen-silicon compound loaded montmorillonite flame retardant and a preparation method thereof. The phosphorus-nitrogen-silicon compound loaded montmorillonite flame retardant is prepared through a solid-phase grafting reaction between a phosphorus-nitrogen-silicon compound and montmorillonite powder particles, wherein the phosphorus-nitrogen-silicon compound comprises an amido containing silane coupling agent and a phosphoryl chloride containing compound, and is grafted onto montmorillonite through chemical bonds. During preparation of the phosphorus-nitrogen-silicon compound loaded montmorillonite flame retardant, an amino in the silane coupling agent reacts with phosphorus oxychloride to generate a by-product, namely hydrogen chloride gas; one part of the hydrogen chloride gas is brought out of the reaction system through nitrogen gas, and the other part of the hydrogen chloride gas serves as a catalyst for a condensation reaction between the silane coupling agent and a hydroxy on the surface of montmorillonite, so that the silane coupling agent can be grafted into the surface of montmorillonite through the solid-phase grafting reaction, the rate of the solid-phase grafting reaction is improved, and the reaction time is shortened.

The invention discloses a method for detecting the content of nickel, cobalt and manganese in a ternary material or a ternary precursor. According to the method, the total molar quantity of the nickel, the cobalt and the manganese is obtained by a complexometric titration method, the molar quantity of the manganese is obtained by an oxidation-reduction titration method, the total molar quantity ofthe cobalt and the manganese is obtained by a potentiometric titration method, and then difference deduction is conducted to obtain the content of nickel, cobalt and manganese in a ternary material or a ternary precursor. According to the method, expensive instruments are not used, the test method is low in cost, operation of testing the content of the nickel by precipitating the manganese is avoided cleverly by the difference deduction method, and the test accuracy is improved.

The invention relates to a modified graphene oxide, the surface of the modified graphene oxide is modified with carbon chains. The preparation method of the modified graphene oxide is a method comprising the following steps: (1) mixing the graphene oxide dispersion with an alkali solution to obtain a graphene carboxylate solution; (2) adding the graphene oxide obtained in step (1) A phase transfer catalyst and a halogenated hydrocarbon are added to the carboxylate solution to react, and then an organic solvent is added to disperse, and after insoluble matter is removed, the modified graphene oxide is obtained by concentrating. The preparation method of the modified graphene oxide provided by the present invention is simple, the reaction conditions are mild, and the reaction can be realized in one step without separating intermediate products; the reaction time is short and the efficiency is high; the modified graphene oxide prepared by the present invention can be stably dispersed in in various organic solvents.

A process for preparing hexanediamine by hydrogenating hexanedinitrile includes such steps as preparing the solution of hexanedinitrile in alcohol, and making the solution in contact with H2 under existance of catalyst in magnetically stabilized-bed reactor. Said catalyst may be the non-crystal alloy catalyst containing Ni as main active component. Its advantages are high hydrogenating effect, low consumption of catalyst, and simple process.

The invention provides cationic synthetic sperm oil fat liquor and a preparation method thereof. In the fat liquor, synthetic sperm oil, maleic anhydride, epichlorohydrin and quaternization reagent are used as raw materials, maleic anhydride modified synthetic sperm oil is obtained by addition reaction of the synthetic sperm oil and the maleic anhydride; the maleic anhydride modified synthetic sperm oil is added with the epichlorohydrin, and reacts with the quaternization reagent to prepare the cationic synthetic sperm oil fat liquor. By adopting an internal emulsification method, a cationic active group is introduced to the molecular structure of the synthetic sperm oil, so the stability of the emulsion, uniformity and permeability of the fat can be greatly improved, and the cationic synthetic sperm oil fat liquor has better effects of dyeing, burnishing and color fixing than that of the cationic fat liquor by the traditional external emulsification method.

The invention discloses a mechanical-activation solid-phase preparation method of a lignocellulose ester group oxidation catalyst. The mechanical-activation solid-phase preparation method comprises following steps: cellulosic solid waste is dried and smashed so as to obtain cellulosic solid waste powder; the cellulosic solid waste powder, an esterifying agent, and an accessory ingredient are delivered into a mixing machine for uniform mixing at a ratio of 100:5-40:1-8 so as to obtain a mixture; the mixture and a grinding medium are delivered into a mechanical-activation solid-phase reactor at a ratio of 100g:200-600ml for ball milling reaction at a rotating speed ranging from 200 to 600rpm at 30-60 DEG C constant water bath temperature; after 0.5 to 1.5h of activation, stirring is stopped, and an esterification product and grinding balls are collected, and are separated so as to obtain a lignocellulose ester mixture; and the lignocellulose ester mixture is subjected to pelletizing so as to obtain the lignocellulose ester group oxidation catalyst. The lignocellulose ester group oxidation catalyst contains no heavy metal, possesses catalytic performance, activation oxidation performance, and adsorption performance at the same time, and can be used for selective adsorption of heavy metal and improving decolorizing effect; and at the same time, cost is low because that the raw materials are solid wastes, the preparation method is simple, and adding amount is low.

The invention relates to a fluorescent probe with an aggregation-induced emission (AIE) property and as shown in a general formula I, and a preparation method thereof, wherein R1 and R2 independently are hydrogen, C1-18 alkyl, halogen, C1-18 alkoxy, C1-18 alkyl sulfenyl, aryl and ceteroary; R3, R4 and R5 are C1-30 alkyl; R6 is an axial bond and C1-6 alkylene; and A<-> is an anion. The fluorescent probe can realize lighting detection of an anionic surfactant by forming an anion-cation aggregate in situ, and has high selectivity and high sensitivity on the anionic surfactant. In addition, the fluorescent probe can be applied to fluorescent dyeing of bacteria, and has the advantages of low background noise, high dyeing efficiency, no need of additional washing and the like. (The general formula I is as shown in the description).

The invention discloses flame-retardant heat-resistant bismaleimide resin and a preparation method thereof, belonging to the technical field of high performance thermosetting resin. According to the technical scheme, the flame-retardant heat-resistant bismaleimide resin is prepared from the following raw materials in parts by weight: 5-20 parts of phenylphosphonic dichloride, 21-52 parts of 1-amino-5-naphthol and 10-40 parts of maleic anhydride. The bismaleimide resin has a good molding technology and a cured product has high heat resistance and excellent flame retardance; the glass-transition temperature of the cured product reaches 370 DEG C, and the limit oxygen index reaches 48; benzyl di(5-amino) naphthoxy phosphonic acid is prepared by reaction between phenylphosphonic dichloride and excessive 1-amino-5-naphthol, and prepared benzyl di(5-amino) naphthoxy phosphonic acid is reacted with maleic anhydride to obtain the flame-retardant heat-resistant bismaleimide resin. The flame-retardant heat-resistant bismaleimide resin and the preparation method disclosed by the invention have the beneficial effects that the reaction is stable, the process condition is easy to control, unreacted raw materials can be recycled, and no three wastes are generated, so that the flame-retardant heat-resistant bismaleimide resin and the preparation method are suitable for industrialized production.