73results about How to "No filter required" patented technology

The invention belongs to a nondestructive detection technology and relates to an industrial scale ultrasonic automatic scanning and imaging detection device used for large-scale structures made of composite materials and metal materials in the fields of aviation, aerospace, electronics, weapons, ships, metallurgy, iron and steel, transportation, construction and the like. The detection device comprises an ultrasonic automatic scanning system, an ultrasonic automatic scanning control and imaging system and a multi-channel ultrasonic system. The design according to the invention adopts a multi-axis parallel numeric control upward floating type super-static steady scanning mechanism and an ultrasonic flexible self-adaptive tracking array acoustic scanning technology, thereby greatly improving the ultrasonic automatic scanning and imaging detection efficiency and the imaging quality of the large-scale structures, realizing the industrial scale high-efficient ultrasonic automatic scanning and imaging detection of the large-scale structures made of the composite materials and the like in different specifications and enabling the detection resolution and a surface blind zone to achieve 0.13mm; and when 20 channels are detected, the efficiency is improved by at least 50 times compared with the manual scanning detection efficiency, and is improved by 20 times compared with the traditional single-channel ultrasonic automatic scanning detection.

The invention discloses a chitosan/polyvinyl alcohol/ferroferric oxide composite magnetic particle as well as preparation and application thereof, and relates to a composite magnetic particle, which is formed by the following components in percentage by mass: 20-80% of chitosan, 10-75% of polyvinyl alcohol and the balance of ferroferric oxide. The particle diameter is 500-4000 micrometers and is controllable. The preparation method comprises the following steps: mixing a chitosan acid solution with a polyvinyl alcohol water solution; adding ferroferric oxide powder; dispersing ferroferric oxide powder in the mixed liquid to obtain a mixed liquid; adding a NaOH solution into the mixed solution; curing to ball-shaped particles; collecting the obtained ball-shaped particles through an outside magnetic field and adding the particles into ethanol; swelling and standing; soaking and washing, and drying to obtain the chitosan/polyvinyl alcohol/ferroferric oxide composite magnetic particle. As shown in experiment, the chitosan/polyvinyl alcohol/ferroferric oxide composite magnetic particle can be used in preparation of agents for removing heavy metal in water.

The invention a polyacrylamide heavy metal flocculating agent and a method for preparing the same.By the aid of the polyacrylamide heavy metal flocculating agent and the method, problems of large acidic heavy metal wastewater and sludge quantities treated by the existing traditional chemical precipitation methods, poor settleability of precipitates and incapability of stably reaching standards can be solved.The polyacrylamide heavy metal flocculating agent comprises polyacrylamide, formaldehyde, dimethylamine, carbon disulfide and sodium hydroxide.A volume ratio of polyacrylamide solution to the formaldehyde to the dimethylamine is 100:6:30-100:1.5:7.5, and a volume ratio of the polyacrylamide solution to the carbon disulfide to the sodium hydroxide is 100:10:17-100:1.5:1.5.The method for preparing the polyacrylamide heavy metal flocculating agent includes preparing amino-methylated polyacrylamide which is an intermediate product; preparing the polyacrylamide heavy metal flocculating agent which is a final product.The polyacrylamide heavy metal flocculating agent and the method have the advantages that required raw materials are easily available, processes for preparing the products are simple, reaction conditions are mild, the polyacrylamide heavy metal flocculating agent and the method are easy to implement and control and have excellent application prospects, and industrial production can be facilitated.

The invention relates to preparation of a molecular sieve, and aims at providing a method for synthesizing an all-silicon Beta zeolite molecular sieve by a sodium-free solvent-free route. The method for synthesizing the all-silicon Beta zeolite molecular sieve by the sodium-free solvent-free route is concretely characterized in that a silicon source, quaternary ammonium hydroxide and all-silicon seed crystals are put into a mortar; after the grinding is performed for 10 minutes, the materials are put into a reaction kettle; crystallization is performed for 1h to 6d at 100 to 240 DEG C; then, the obtained product is subjected to suction filtration and drying to prepare all-silicon Beta molecular sieve raw powder. The method for synthesizing the all-silicon Beta zeolite molecular sieve by the sodium-free solvent-free route has the advantages that the ion exchange process in the aftertreatment process is avoided; the prepared product does not need filtering or centrifugation; after the roasting, the prepared product can be directly used for performance research.

The invention provides a preparation method of an adsorbent for industrial wastewater treatment. The preparation method particularly includes steps: (1), preparing modified composite powder; (2), preparing a composite crosslinking adsorbent; (3), preparing a magnetic composite crosslinking adsorbent. Kaolin and sepiolite are composited to serve as a basic adsorbent raw material, and the characteristics that kaolin and sepiolite have high specific surface area, complex pore structure and excellent adsorption site are fully combined, so that adsorption activity when a single raw material is used as an adsorbent is improved greatly. In addition, a quaternary ammonium salt surfactant and cetyl trimethyl ammonium bromide are adopted to modify kaolin and sepiolite, so that alternating performance and adsorption performance of the adsorbent are improved; by introducing polyvinyl alcohol and chitosan for crosslinking reaction, stability and strength of the adsorbent are improved, and the obtained adsorbent can efficiently adsorb pollutants like heavy metal ions, dye and petrochemical pollutants in industrial wastewater.

The invention relates to an analyzing method for detecting activity of soil xylanase, which comprises the following steps: firstly, weighting n sieved air dry soil samples into n thick test tubes, adding acetic acid buffer solution into each test tube, oscillating by a vortex oscillator, getting soil suspension into 96 micropore plates under the oscillation condition, adding 4-MUB-7-Beta-D-xyloside substrate solution into n-1 holes, and adding water with equal quantity into the other one hole so as to be used as non-substrate contrast, adding substrate solution with equal quantity and water with equal quantity into the (n+1)th hole so as to be used as soli-free contrast, oscillating and culturing under constant temperature; secondly, adding NaOH into the micropore plates to terminate the reaction after the culture is finished; thirdly, performing the fluorimetric determination to resultant of reaction by a multifunctional microplate reader; and fourthly, calculating the activity of the xylanase. Compared with the traditional method, the invention shortens the culture time, omits the operation procedures of filtration, and the like, and simplifies the operation steps; meanwhile, the determination data of fluorescent materials in the micropore plate can be obtained within 15s through the multifunctional microplate reader, huge samples are allowed to be simultaneously determined; and moreover, the invention has high accuracy and easy operation, stable and reliable result and good reproduction quality.

The invention discloses a hydrogen storage material for fuel cell, a preparation method and the usage thereof. The hydrogen storage material comprises a borohydride and an absorption material and has advantages of stable performance, easy storage and carry which can control the releasing speed of the hydrogen without filtering the prepared hydrogen and belong to the field of fuel cell.

The invention discloses a method for extracting polyphenol from tobacco through a double-water-phase system. The method comprises the following steps: (1) ultrasonically extracting dry and crushed tobacco raw material, adding an inorganic salt solution and a hydrophilic micromolecule organic solvent to form the double-water-phase system, mixing, stirring, ultrasonically extracting, standing to separate the phases, wherein the polyphenol is extracted to the upper phase and the residues are distributed to the lower phase and a demarcation layer; and (2) directly sucking the organic solvent upper phase in the double water phase after ultrasonic extraction in the step (1), so as to obtain polyphenol extract; removing the inorganic salt from the polyphenol extract, and drying at a low temperature to obtain a tobacco polyphenol product. On premise of same material-liquid ratio, the one-time extraction efficiency is higher than that of a pure ethanol solution, and moreover a small amount of organic solvent is used, the organic solvent is rapid to separate, a solid residual material does not need to be filtered, the contents of protein and sugar in the extracted organic phase are greatly reduced, the obtained extraction liquid is high in concentration, small in volume, beneficial to later concentration and purification, and beneficial to industrialization.

The invention discloses a self-circulation fuel cell control system and a method thereof. A fuel cell electric pile charges and exhausts gas in a bidirectional way, one end of an oxidant passage is provided with a container used for holding an oxidant, the other end of the oxidant passage is divided into two paths which are respectively connected with two ends of the fuel cell electric pile through a first solenoid valve and a fourth solenoid valve, a bypass pipe provided with a third solenoid valve is connected between the first solenoid valve and the fuel cell electric pile, and a bypass pipe provided with a second solenoid valve is connected between the fourth solenoid valve and the fuel cell electric pile. By sequentially opening and closing the solenoid valves for the control of bidirectional gas charge and exhaust, the oxidant is not needed to be filtered, humidified or heated; and the invention has the advantages of low working pressure, good sealability, simple structure, convenient operation and low cost.

The invention discloses bacillus thuringiensis. The bacillus thuringiensis is obtained from sunflower tissue fragment impurities of a natural material through screening. The preservation number is CGMCC No.11769; the preservation unit is China General Microbiological Culture Collection Center; the preservation address is No.3, Countyard 1, Beichen West Road, Chaoyang District, Beijing. The bacillus thuringiensis Bt 00-50-5 strain can produce elliptic spores, rhombus crystals and more than 8 extracellular proteins, wherein the crystals and the extracellular proteins have high toxicity and can efficiently kill the lepidopterous insects, the plant parasitic nematodes and the plant coleosporium. The bacillus thuringiensis Bt 00-50-5 capable of killing the plant coleosporium is obtained through screening at home and abroad for the first time and has the best plant disease and insect pest control effect.

The invention discloses a synthetic method of hydrogen. The method is that borohydride, hydroxide and water absorbent material are mixed evenly and then water is added to the mixture to form a borohydride gel solution, namely hydrogen storage material, a catalyst is added into the hydrogen storage material, and the borohydride is subjected to hydrolyzation to generate hydrogen. The method has the advantages that the hydrogen storage material provided through the method is stable in performance and convenient to store and carry, release rate of the hydrogen can be controlled, and the obtained hydrogen does not need to be filtered.

The invention discloses a hydrogen fuel synthetic method which comprises the following steps: mixing well hydroboron, water absorbing materials, hydroxide and catalytic agents, and obtaining hydrogen storage materials; injecting water into the hydrogen storage materials, and dissolving the hydroboron and the hydroxide to form alkaline solutions, wherein the water absorbing materials absorb the alkaline solutions to form gel-like hydrogen storage materials; and hydrolyzing the hydroboron under the action of the catalytic agents to produce hydrogen gas. According to the hydrogen fuel synthetic method, the releasing speed of the hydrogen gas can be controlled, and the prepared hydrogen gas is high in purity, and is not required to be further filtered.

The invention relates to a preparation method of an adsorbent for complexing heavy metals in water. The preparation method comprises the following steps: crushing a biomass raw material to 20-100 meshes, and carrying out heat treatment at 270-500 DEG C under the protection of nitrogen; carrying out violent stirring and soaking treatment with a 0-2 mol/L KOH solution, washing with deionized water to be neutral, and drying; treating at a temperature of 40-90 DEG C according to a ratio of a biological material to dimethylformamide to 30% NaOH to epichlorohydrin of 3 g to 10-30 mL to 0-10 mL to 5-20 mL; reducing the temperature to 30-40 DEG C, slowly adding 2.5-10 mL of diethylenetriamine or triethylenetetramine in a dropwise manner, and treating; adding absolute ethyl alcohol and CS2 into thesample subjected to suction filtration treatment with a proper amount of acetone, ethyl alcohol and deionized water, and treating under an ice-water bath condition; and finally repeatedly washing thesuction filtration sample with deionized water, and drying at 40 DEG C. The prepared adsorbent for complexing heavy metals has the advantages of strong specific surface area, strong chelating capability, easily available materials, rich resources, convenience use, simple operation, no requirement of additional separation process, mild preparation conditions, easy in batch production and the like.

The invention discloses a method for preparing fuel cells hydrogen, which belongs to the field of fuel cells. The method includes adding water after uniformly mixing borohydride, hydroxide and water absorption materials to form borohydride gel solution, namely hydrogen storage materials, adding a catalyst to the hydrogen storage materials, then the borohydride hydrolyzes and hydrogen is produced. Hydrogen storage materials prepared according to the method provided by the invention have the advantages of stable property, easy storage and portability, which can control hydrogen releasing speed without filtering prepared hydrogen.

The invention provides a high-throughput detection pretreatment method for fat-soluble vitamins in blood plasma. The method comprises the following steps: S1, uniformly mixing a blood plasma sample tobe treated with an internal standard solution, and performing ultrasonic oscillation incubation; S2, adding an extraction reagent, precipitated protein and macromolecular hydrocarbon; S3, adding a first magnetic bead suspension, performing ultrasonic oscillation, combining the first magnetic beads with protein precipitation, macromolecular hydrocarbon precipitation and phospholipid, performing magnetic separation, and reserving liquid; and S4, performing nitrogen blowing concentration, and adding an organic solvent for redissolution for detection and analysis. The invention also provides a kit. According to the detection pretreatment method, protein, macromolecular hydrocarbon and phospholipid in blood plasma are removed through adoption of a paramagnetic particle method, centrifugation or filtration is not needed, and high-throughput operation can be achieved. The kit disclosed by the invention is simple and convenient to operate, the magnetic beads have magnetic separability and canbe quickly separated from a solution under the action of an external magnetic field, high-flux operation can be realized by matching with an automatic instrument, and the extraction working efficiency is improved.

The invention provides a dustproof air pressure follow-up control valve for an aero-engine lubrication system. The dustproof air pressure follow-up control valve comprises a mounting base, a control valve shell, a valve guider, a conical valve body, a control valve body and a dust removal assembly, wherein a control chamber inlet and an exhaust port are formed in the mounting base; the control valve shell is fixed relative to the mounting base, and a control air source inlet is formed in the control valve shell; the valve guider is fixed in an accommodating chamber formed by the mounting base and the control valve shell and divides the accommodating chamber into a conical valve chamber and a control valve chamber; the conical valve body and the control valve body are respectively arranged in the conical valve chamber and the control valve chamber, the conical valve body is supported by a conical valve spring, the control valve body is supported by a control valve spring, and the conical valve body is arranged on a guide rod of the control valve body; the dust removal assembly is arranged at the control air source inlet and comprises a dust remover nut connected with the control air source inlet, a dust remover arranged on the control air source nut, a dust remover guide pipe connected with a control air source guide pipe and a dust remover outer cover used for connecting the dust remover guide pipe with the dust remover nut; and a control air source entering the control valve can be filtered through the dust removal assembly.

The invention discloses a method for preparing fuel cells hydrogen, which belongs to the field of fuel cells. The method includes adding water after uniformly mixing borohydride, hydroxide and water absorption materials, leading water absorption materials to absorb an alkaline borohydride solution to form a gel-like hydrogen storage material, adding a catalyst to the hydrogen storage material, then the borohydride hydrolyzes and hydrogen is produced. The hydrogen storage material provided by the invention has the advantages of stable property, easy storage and portability, which can control hydrogen releasing speed without filtering prepared hydrogen.

The invention relates to a method for rapid detection of phenytoinum natricum analogues in a product, and particularly relates to the method for detection whether the product suspected to be mixed with phenytoinum natricum or the analogues thereof contains phenytoinum natricum or the analogues thereof. The method comprises the following steps: (1) taking a proper amount of the product, mixing with a special solvent, shaking or carrying out ultrasonic assisted dissolution, and thus obtaining a mixed test solution; (2) detecting specific electrochemical parameters of the mixed test solution by using a proper detector based on a specific electrochemical method; and (3) according to the value of the parameters, judging whether antiepileptic substances of phenytoinum natricum or the analogues thereof are possibly added illegally in the product. The method has no need of filtering the sample solution; time consuming of the whole detection processes is only 2-3 min; and the method is rapid, convenient and safe, and is high in sensitivity and friendly to the environment.

The invention provides a preparation method of graphene. The preparation method comprises the following steps of: cleaning and drying a substrate made of metal material; placing the dried substrate into a reaction chamber; charging protective gas into the reaction chamber; heating the reaction chamber; charging reducing gas; adding graphite oxide powder to the reaction chamber to react; stopping adding the graphite oxide powder as well as stopping charging the reducing gas after the reaction is accomplished; cooling to reach the room temperature at the protective gas atmosphere; and preparing the graphene on the surface of the substrate. According to the preparation method of the graphene, provided by the invention, the graphite oxide is adopted and used as the raw material and is subjected to reduction at high temperature under the reducing gas atmosphere in order to prepare the graphene; and compared with the conventional solution reducing method, the preparation method provided by the invention has the advantages of being short in preparation time, small in floor space for the required equipment, simple, easy and feasible in operation, free from filtering, high in production efficiency, and easy for realization of automatic and industrial production.