732 results about "Solution system" patented technology

The invention relates to a lithium battery with a polymer-coated sulfur/carbon composite material as an anode. According to the invention, sublimed sulfur or sulfur powder and a conductive carbon material are mixed according to a mass ratio of 3:7-8:2; the mixture is subject to ball milling, such that a sulfur/carbon composite material is obtained; the composite material is dispersed in a solution, and a polymer monomer is added to the solution; under a low temperature and the protection of inert gas, an oxidizing agent is added for initiating polymerization; the material is centrifuged, washed, and dried; the obtained polymer-coated elemental sulfur/carbon composite material, acetylene black and PTFE are mixed; a dispersant is added to the mixture, and the mixture is sufficiently mixed by stirring; the mixture is rolled into a sheet, and is vacuum-dried under a temperature of 55 DEG C, such that an electrode sheet is obtained. The prepared electrode sheet is adopted as an anode, metal lithium is adopted as a cathode, and a solvent type organic solution system containing 0.2mol/L of a waterless lithium nitrate additive is adopted as electrolyte, and a battery is assembled. With the electrode material, the assembled lithium battery is advantaged in high specific capacity, good circulation stability, and excellent heavy-current charge/discharge performances. The preparation method is advantaged in simple process, low cost, and good repeatability.

Systems and methods for vendor managed inventory (VMI) that include a demand management system that receives customer product usage data and forecasts customer demand for products in accordance with the product usage data. The VMI system also includes an order management system that receives orders from the demand management system and sends the order for fulfillment. A relational database stores customer information for later retrieval and ad hoc querying. An aspect integrator platform is provided for collaboratively presenting the customer information.

The present invention discloses a troposphere atmosphere delay error correction method and correction system. The method comprises the steps of (1) obtaining GNSS observation data through a GNSS foundation reinforcement system network reference stations, (2) sending the GNSS observation data to a CORS server baseline solution system, wherein the step (2) concretely comprises the steps of (a) decomposing troposphere delay into a troposphere dry component and a troposphere wet component according to the GNSS observation data and (b) carrying out regional linear interpolation model processing on the troposphere wet component to obtain a wet component correction value, and using a troposphere prior model to carry out altitude component correction of the troposphere dry component to obtain a dry component correction value, (C) combining the wet component correction value and the dry component correction value to obtain a troposphere correction value total. According to the method, the improvement of troposphere delay error correction is facilitated.

A general, computational-mathematical modeling method for the solution of large, boundary-coupled transport problems involving the flow of mass, momentum, energy or subatomic particles is disclosed. The method employs a modeling processor that extracts a matrix operator equation (or set of equations) from a numerical transport code (NTC). The outputs of software codes, available for modeling physical problems governed by conservation laws in the form of differential equations, can be processed into closed-form operator equations with the method. Included is a numerical transport code functionalization (NTCF) model which can be determined numerically, based on a system of solutions of an NTC, evaluating outputs for a given set of inputs. The NTCF model is a linear or nonlinear, multi-variable operator equation or set of such equations. The NTCF model defines relationships between general, time-variable inputs and outputs, some known and some unknown, considered as boundary values. The user of an NTCF model can directly work with the processed model output, instead of running the original numerical code in general applications of a boundary-value problem. The numerical transport code functionalization model can be employed as a surrogate for representing the numerical transport code to provide a solution to the transport problem. The invention enables modeling efficiency and availability to be increased, while computational complexity and cost decreased. Computational times for complex modeling problems can, in some cases, be dramatially reduced, for example by several orders of magnitude.

The invention relates to a method for design advanced materials with nano-scaled structure and techniques for preparing same. In particular, the invention relates to a carbon material capable of controllable laminated combination with the nano-holes of variable sizes and preparation and application thereof. The method comprises the steps of: preparing metal oxide sol in the alkali solution system, which is then mixed with an alcohol solution of an alcohol-soluble resin; the oxide sol being used as the template and water being the resin precipitation agent during the process to directly prepare resin/oxide sol composite system. After solvent removal, carbonization, activation and template removal processes, the carbon material with laminated nano-holes combination is prepared which is of controllable micro-holes proportion, controllable medium-holes aperture and proportion, controllable big-holes aperture and propotion and concentrated distribution of medium-holes and big-holes apertures. The carbon material capable of controllable laminated combination with the nano-holes of variable sizes prepared in the invention is characterized in laminated holes structure, excellent ion transfer performances and high electrochemical active specific surface area and the material is expected to be used as high energy density high power density electrochemical capacitor used electrode material.

The invention discloses a preparation method for a graphene/aramid fibre 1414 nano-fibre composite membrane, comprising the following steps of: performing nano-fibrillation on aramid fibre 1414 yarns via the solution system of dimethyl sulfoxide and potassium hydroxide; slowly adding dimethyl sulfoxide solution for oxidizing graphene, sequentially centrifuging, dispersing, performing suction filtration and film formation, and thus obtaining oxidized graphene/aramid fibre 1414 nano-fibre composite membrane; and reducing via hydroiodic acid, washing, drying, and thus obtaining the graphene/aramid fibre 1414 nano-fibre composite membrane. The tensile strength and the Young modulus of the graphene/aramid fibre 1414 nano-fibre composite membrane obtained by the preparation method disclosed by the invention can achieve 209.4 Mpa and 29.5 GPa respectively, thus showing excellent mechanical property; simultaneously, the conductivity of the graphene/aramid fibre 1414 nano-fibre composite membrane can achieve 175 S/m, thus being excellent in conductance; and a thermogravimetric analysis shows that the graphene/aramid fibre 1414 nano-fibre composite membrane is good in heat stability.

The invention belongs to the technical field of tunnel construction, and relates to a low-alkaline liquid accelerating agent and a preparation method thereof. For the low-alkaline liquid accelerating agent, aluminium sulfate solution is neutralized with sodium aluminate solution to produce aluminium hydroxide collosol, and then aluminium sulfate and aluminium hydroxide collosol conduct polymerization reaction in an original solution system to produce polymerized aluminium sulfate, so that the accelerating agent solution has higher aluminium ion content and liquid stability; the low-alkaline liquid accelerating agent is prepared by aluminium sulfate, sodium aluminate and stabilizing agent; and the mass percentage of the components are as follows: 40 to 60 percent of aluminium sulfate, 6 to12 percent of sodium aluminate, 0 to 0.2 percent of stabilizing agent, and the balance of water. The invention has the following positive effects to sprayed concrete: initial set of common cement can be realized in five minutes and final set of the common cement can be realized in eight minutes under lower doping amount; the 1d strength of cement mortar can reach more than 12MPa, and the 28d compression strength ratio of the cement mortar is more than 100 percent; and the invention has good adaptability to cement of different varieties.

The present invention discloses a spongy-like lightweight graphene aerogel preparation method, which comprises: preparing a graphene oxide colloid solution with a concentration of not more than 10 mg/mL; adding a surfactant with a concentration of 0.01-0.1 wt% into the graphene oxide dispersion, and completely dissolving to obtain a foam-like graphene oxide foam suspension; and immediately placing the foam system into liquid nitrogen after completing the foaming, carrying out rapid freezing shaping, carrying out freeze drying, and removing the water to obtain the graphene aerogel material. According to the spongy-like lightweight graphene aerogel of the present invention, the solution system surface tension is reduced, and the dispersion property of the graphene oxide in the solvent is improved while the specific surface area of the aerogel material is further increased so as to improve the adsorption property on dyes, organic solvents and other substances; and the prepared spongy-like lightweight graphene aerogel material has characteristics of simple process, low cost, stable structure, excellent performance, and maximal maintaining of the excellent properties of the graphene material.

The invention discloses a detection method of metal ions. In the method, based on a gold nanoparticles-sulfide system, by virtue of the interaction among the gold nanoparticles, a hydrolysate of a sulfide and the detected metal ions or the interaction among the gold nanoparticles, a sulfhydryl compound and the detected metal ions, resonance absorption of plasmas on the surface of the gold nanoparticles changes so that the color and the ultraviolet visible absorption strength of the gold nanoparticles changes. By adopting the method, the detected metal ions in the solution system can be rapidly detected by directly distinguishing change of solution color through eyes or a simple apparatus. The detection method has the advantages of simple and convenient operation, low detection cost, high detection sensitivity, small sampling quantity and wide application scope.

The purpose is to solve target problems in short calculation time certainly without describing algorithms that are data procedures on computers. As the solution method, because it is configured so that, when the initial values or variation values, which are used for constraint conditions with regard to target problems and the relevant constraint conditions, are set through Variable Value Setting 2, then Constraint Condition Extraction 3 extracts constraint conditions that are related to those variables, then Constraint Condition Calculation 4 searches for the solutions for each constraint condition one by one, and Variable Value Resetting repeats searching for the solutions for each constraint condition setting these searched solutions as new variables, so the course of solution searching becomes clear, and it becomes possible to surely reach the final solution and dramatically speed up computing, because each markedly simplified constraint condition has only to be solved.

The invention discloses an organic-inorganic in-situ composite flocculant and a preparation method thereof. The organic-inorganic in-situ composite flocculant is prepared by the steps of taking inorganic powder as a disperse phase, adding acrylamide, initiating agent and solvent to form a mixed solution system and carrying out in-situ polymerization reaction for 10 to 24 hours at 40 to 70 DEG C, wherein the mass percentage of the inorganic powder in the solution system is 1 to 60 percent, the mass percentage of the acrylamide in the solution system is 1 to 50 percent, and the mass ratio between the initiating agent and the acrylamide is 0.5 to 2: 100. The invention integrates the advantages of organic flocculant and inorganic flocculant and fully develops the flocculating effects of the acrylamide and the inorganic powder; and the organic-inorganic flocculant prepared by utilizing an in-situ composite technology can ensure that the decoloration ratio of dyeing wastewater can reach more than 90 percent. The flocculant has wide application range, low cost, simple and convenient method, mild synthesis conditions, strong practicability and easy industrial production.

The invention discloses a nanogold solution and a method for detecting Co<2+> by using the same. The water soluble functional nanogold solution is prepared by using a gold salt as the resource of gold nanoparticles, a quaternary ammonium salt as a surfactant, ion clusters containing sulfur elements and carbon oxygen groups (O=C=O) as ligands, sodium borohydride, potassium borohydride or ascorbic acid as a reducing agent, and deionized water as a synthesis medium and by modifying the surface of the nanogold with the ion clusters containing sulfur elements and carbon oxygen groups (O=C=O) under the action of gold-sulfur bonds (Au-S). The nanogold solution has high speed, selectivity, sensitivity and practicality for detection of trace amount of Co<2+> in the water solution system, and therefore can be used in combination of a colorimetric process for detecting trace amount of Co<2+>; the detection concentration is lower than 8.5*10<-7>M; the detection threshold value may reach 5*10<-10>M; the detection speed is high, the selectivity is high, the cost is low, and the carrying is convenient; and the detection method has a bright application prospect in fields of environmental science, detection chemistry and analysis chemistry, and the like.

The invention belongs to the technical field of a high-molecular material and medical treatment, and particularly relates to a medical high-molecular material with an anti-adhesion characteristic, a preparation method and application thereof. The medical high-molecular material is a solution system of a segmented copolymer material formed by connecting a polyethylene glycol hydrophilic chain segment and a copolyester hydrophobic chain segment, wherein the copolyester hydrophobic chain segment is formed by copolymerizing two or more than two of glycolide, lactide, caprolactone, 1,4,8-trioxaspiro [4.6]-9-hendecanone and para-dioxanone. The solution system of the segmented copolymer material has a temperature sensitive characteristic and spontaneously forms a gel under the body temperature. The material has an effect of preventing wound surface adhesion after being coated on the postoperative would surface.

The invention discloses an ion liquid electrolytic solution and a secondary lithium battery containing the electrolytic solution. The ion liquid electrolytic solution is characterized in that a lithium secondary battery non-water electrolytic solution comprises an ion liquid containing electrolyte salt and a nitrile group functional group, a hydrogen fluorine ether, a non-water organic solvent and an addition agent; the ion liquid of the nitrile group functional group used by the electrolytic solution is beneficial to improving the security of the lithium secondary battery, the content of the ion liquid is more than 40%, and the electrolytic solution has the obvious flame retardant effect; the hydrogen fluorine ether is contributed to improving the wettability of the electrolytic solution containing the ion liquid on an electrode material and a diaphragm, and meanwhile, electrochemistry properties such as a cycle property, a high temperature keeping property of the lithium secondary battery are obviously improved; and an electrolytic solution system uses the ion liquid of the nitrile group functional group and the hydrogen fluorine ether in a composite manner, the combination properties such as the cycle property, the safety property and high temperature characteristics of the lithium secondary battery are obviously improved.

The invention provides bacillus lentus and a method for generating by inducing bacillus lentus for reinforcing foundation, the bacillus lentus URIC, the bacillus lentus UR9D, and the bacillus lentus UR52 are preserved in China General Microbiological Culture Collection Center (CGMCC) on August 29, 2012; the method comprises: firstly, respectively fermenting and culturing a single bacterium colony of bacillus lentus in a fermentation medium, then grouting in two steps, filling bacteria liquid into a sand column pumped with deionized water, and filling a mixed solution of reaction solution calcium chloride and urea, to form a microbe-calcium carbonate-sand grains consolidating body in a sand grain-solution system, and furthermore to enhance bonding degree and intensity of the sand grains. The bacillus lentus and the method of the invention has advantages of short solidification time, good effect and low cost, and will not cause pollution on environment.

The invention discloses a durable alkali-free liquid setting accelerator and a preparation method thereof. The durable alkali-free liquid setting accelerator is prepared from the following components in percentage by mass: 20%-28% of aluminum hydroxide sol, 10%-16% of modified silica sol, 5%-9% of modified alcohol amine, 4%-6% of cellulose fiber, 1%-3% of a stabilizer and 40%-60% of water. The preparation method comprises the following specific steps: (1) preparing the aluminum hydroxide sol; (2) preparing the modified silica sol; (3) preparing modified alcohol amine; and (4) adding reinforced fiber, the stabilizer and water, and stirring for 4-6 hours at 75-85 DEG C to obtain the finished product. The liquid setting accelerator is free of sulfate ions, alkali metal ions, chloride ions and other corrosive substances, a stable solution system is prepared and no phenomenon of layering is caused after the liquid setting accelerator is stored for above 6 months at normal temperature, the cost is low and the long-term strength has almost no loss and when applied in construction of shotcrete, the liquid setting accelerator plays a positive role to improve the durability of concrete.

The invention discloses a method for extracting and purifying spittle DNA, which comprises the following: 1) a step of pre-treatment, which is to contact the spittle with pretreatment lysis solution, remove solid matters adhered onto cells and obtain coarse lysis solution; 2) a step of nucleic acid absorption, which is to mix the coarse lysis solution obtained by the step 1) with lysis binding solution and magnetic bead suspension to form a solution system containing magnetic nano microsphere and DNA composite and is to collect the magnetic nano microsphere and DNA composite from the solutionsystem; and 3) a step of washing, which is to wash the magnetic nano microsphere and DNA composite obtained by the step 2) with washing liquid I and washing liquid II in turn, and dissolve out DNA byusing eluent. When the method provided by the invention is used, the DNA extraction efficiency may reach 90 percent, the extracted DNA can be used in short tandem repeat (STR) composite amplification, DNA sequencing, DNA quantification and other downstream analysis and operation.

The invention relates to electrolytic electric spark cutting composite micromachining device and method in the technical field of mechanical manufacture. The electrolytic electric spark cutting composite micromachining device comprises a cutter system, a mechanical movement system, a power supply system, a working solution system and a control system. On the basis of the traditional non-conducting material electrolytic electric spark machining technology, the invention introduces cutting machining by utilizing physical contact characteristics of a machining electrode and a non-conducting workpiece to be machined so that the cutting machining becomes new electrolytic electric spark cutting composite micromachining. The composite machining method overcomes the defects of machining efficiency, machining precision, and the like of the traditional electrolytic electric spark machining method and improves the machinability of difficult machining materials, such as glass, ceramics, and the like.

The invention belongs to the technical field of recovery of noble metals from waste catalysts through wet process and particularly relates to a method for recycling metal palladium from waste palladium-aluminum oxide catalysts. The process of the method mainly comprises the following steps: fluidizing, oxidizing and roasting; pre-grinding, reducing and activating; and oxidizing and leaching. The method specifically comprises the following steps: quickly roasting and decarbonizing waste catalysts at 550-650 DEG C in the air atmosphere; cooling the waste catalysts and then finely grinding, reducing and pre-treating the waste catalysts in a reducer-containing hydrothermal solution system; and oxidizing reduction slag in a hydrochloric acid and oxidant system to leach palladium. Through the method for recycling the metal palladium from the waste palladium-aluminum oxide catalysts, the problem of low leaching rate of palladium from palladium-aluminum oxide based catalysts of the petroleum chemical industry in the prior art can be solved. The method is short in process, simple to operate and low in production cost; and the leaching and recycling rate of palladium reaches over 99%.

The invention relates to the preparation method of a small crystal ZSM-5/mordenite composite molecular sieve, mainly solving the problems in the existing preparation process of ZSM-5/mordenite composite molecular sieve of bigger crystal of the composite molecular sieve, low catalytic activity and fast activity loss in the reaction in which ethene and propylene are prepared by the catalyzing and cracking of naphtha. The invention well resolves the problems by adopting the technical proposal that the ZSM-5 with decent silica alumina ratio and the crystal seed of mordenite is added in the synthetic process of the molecular sieve and the PH value of the molecular sieve raw material solution system is adjusted to 9-14 in the preparation process. The ZSM-5/mordenite composite molecular sieve prepared by the method can be applied in the industrial production, in which ethene and propylene are prepared by the catalyzing and cracking of naphtha.

The invention discloses an accelerated corrosion test device capable of simulating a marine atmospheric environment, which relates to the technical field of material science experiments. A solution system is implemented through storing a sodium chloride solution with a required concentration in a solution storage tank, and conveying the solution to a nozzle along a solution conveying duct through a solution conveying pump. Purified compressed air obtained by using an air compressor is fed into the nozzle along a gas duct, and then purified compressed air carrying the solution is injected out of the nozzle and forms a salt-spray environment in a main box body of an accelerated corrosion box. An ultraviolet light system is implemented through that strip-tube-shaped ultraviolet light tubes respectively provided with a protective cover are parallelly arranged on a horizontal plane (close to an inlet) of a main body of the corrosion box at equal intervals so as to keep that the intensities of ultraviolet light at each part of the same horizontal plane are same. The intensity of the ultraviolet light can be measured through a light intensity meter. According to the device, after the ultraviolet light system is installed, the erosion effect of the ultraviolet light on materials and the synergy effect of salt-spray and the ultraviolet light on the reliability of materials in the marine atmospheric environment can be truly simulated.

The invention discloses a method for detecting a single molecule of a single silicon nanowire in real time based on a surface enhanced raman scattering (SERS) effect. The method comprises the following steps of: 1) dispersing the silicon nanowire of which a surface oxide layer is removed in aqueous solution of cetyltrimethyl ammonium bromide (CTAB), adding metal silver ion-containing solution into dispersion of the silicon nanowire under stirring, reacting for a period of time, centrifuging a product and collecting precipitates, and dispersing the obtained silicon nanowire on which the surface is loaded with silver particles in ethanol; and 2) dropwise adding ethanol dispersion of the silicon nanowire into a groove of a glass slide with the groove, adding aqueous solution of molecules to be tested into the groove after ethanol is volatilized, sealing the groove by using cover glass, irradiating the silicon nanowire at the groove by using laser of a certain wavelength, and collecting araman signal to realize real-time detection of the single molecule. The method is simple and fast and has a mild reaction condition, the prepared material has stable performance and higher SERS response, the detection of the single module in a solution system is realized, and a good platform is provided for researching the reaction of the single module in the solution system.

The invention discloses a method for extracting purified DNA from human exfoliative cells. The method comprises the following steps: 1) pretreating: contacting the human exfoliative cells with pretreating lysate to remove the solid matters adhering to the biological cells to obtain coarse lysate; 2) nucleic acid adsorbing: mixing the coarse lysate obtained in the step 1) with lysis integrated liquid and magnetic bead suspension to form a solution system containing a magnetic nano microsphere-DNA compound and collecting the magnetic nano microsphere-DNA compound in the solution system; and 3) washing: washing the magnetic nano microsphere-DNA compound obtained in the step 2) with washing liquid I and washing liquid II respectively and then dissolving out the DNA with eluent. The efficiency of extracting DNA by the method can reach 90% and the extracted DNA can be applied to such downstream analysis operations as STR (short tandem repeat) multiplex amplification, DNA sequencing, DNA quantifying and the like.

The invention relates to an etching solution for a copper-molybdenum alloy film. The pH value of the etching solution is 1-2. The etching solution comprises, by mass, 1%-5% of hydrogen peroxide, 0.1%-10% of inorganic acid, 0.5%-10% of sulfate, 0.5%-15% of inorganic ammonia salt buffering agents, 0.01%-10% of alcohol amine pH modifiers, 0.1%-10% of hydrogen peroxide stabilizers, 0.1%-5% of metal ion chelating agents, 0.01%-5% of metal inhibiters, and the balance deionized water. According to the etching solution for the copper-molybdenum alloy film, a small quantity of hydrogen peroxide is added and assisted with the metal inhibiters and inorganic acid, and the substances such as the sulfate and the inorganic ammonia salt buffering agents are added, so that the change of the pH value of an etching solution system is kept within +0.3 all the time in the etching process; the stability of the pH value of the etching solution system in the etching process can be kept, and nonuniform etching caused by an excessively-low pH value can be avoided; and in the process that the content of copper ions changes from 0 ppm to 1000 ppm, the etching speed is not changed, the etching CD and the slope angle are basically unchanged, etching residues are avoided, and the requirement of customers for high-precision machining is met.

The invention discloses a direct vertical deposition method of a zinc oxide nanometer rod array on a titanium dioxide film, wherein the zinc oxide is an important inorganic semiconductor function material and arouses wide public concern due to the unique performances of catalysis, electricity, optics and photochemistry, and the like. Persons are interested in the control synthesis of one-dimensional zinc oxide due to the remarkable laser behavior of the one-dimensional zinc oxide. The method comprises the steps of: preparing titanium dioxide sol under room temperature; preprocessing; adhering with one layer of titanium dioxide sol on a preprocessed glass or an electric glass ITO by means of dipping and pulling; preprocessing titanium dioxide grains before drying and spinning; fixing a layer of titanium dioxide grains prepared by means of a sol-hydrothermal method on the substrate by means of spinning; drying; roasting to obtain the nanometer zinc oxide film; putting the zinc oxide film into a sealed water solution system of zinc salt and organic amine; reacting for 12-72 h under the reaction temperature of 45-90 DEG C; taking out; washing with secondary water; and drying. The invention relates to a nanometer material.

The invention discloses a double-ion response type SERS (Surface Enhanced Raman Scattering) probe and a preparation method thereof. The probe comprises two nano particles with independent core-shell structures, wherein a carrier nano particle comprises four layers of core-shell structures; the four layers of core-shell structures are as follows: the innermost layer is made of Fe3O4 magnetic nano balls, a layer of silicon dioxide is coated outside the innermost layer, the second-outer layer is a gold foil shell layer, and the outermost layer is an oligonucleotide coating layer; an object nano particle comprises two layers of core-shell structure; the two layers of core-shell structure are as follows: the inner core is made of Raman molecule marked gold nano-balls, and a shell is an oligonucleotide coating layer. Due to the adoption of a specific base sequence in the oligonucleotide coating layer, the identify and SERS trace detection on two metal ions, namely silver/mercury, in an environment solution can be performed at the same time; furthermore, under the action of an external magnetic field, the probe and the obtained silver/mercury ions can be rapidly separated from an initial environment solution system, and therefore, the function of purifying the environment is realized.

The invention provides a low-energy consumption seawater electric desalter and a method capable of realizing energy recovery. The electric desalter comprises an electric collection cathode, an active carbon cathode, a permeable separation medium, an active carbon anode and an electric collection anode. The invention is characterized in that the absorption of double electric layers of active carbon electrodes is used to form the structural property of super capacitance. In charging and desalting processes, ions or granules with charges can be absorbed and concentrated on the active carbon electrodes in the electric desalter, and the inner chamber of the device can recover purified water or fresh water; in discharging and electrode regenerating processes, the ions or the granules with charges absorbed on the active carbon electrodes are desorbed and return to a solution system, and the achieved thick saltwater can be used for recovering the salt in brackish water or seawater. The electric desalter can be used for desalting seawater or brackish water or the purification and the metal recovery of the waste water containing ions. The invention can desalt the seawater or the brackish water to the fresh water with the Cl concentration being less than or equal to 30 ppm, and the running cost for processing the water is less than or equal to 1 yuan per ton.

A vacuum cleaner attachment comprising an upper tubular elongated hollow member having a first open end and a second open end, a connector, and a lower elongated hollow member having a first end and a second end, the first end adapted to fit the connector. The first open end of the upper tubular elongated hollow member is adapted to connect to an end of a vacuum cleaner hose connected to a vacuum cleaner and the second open end of the upper tubular elongated hollow member is adapted to connect to the connector. The connector comprises an elbow attachment and connects the upper tubular elongated hollow member and the lower elongated hollow member The lower elongated hollow member comprises an elongated flattened rectangular profile having a bottom surface and a top surface, the bottom surface located adjacent a floor surface when a user is operating the vacuum cleaner.

This invention discloses a wet method for treating high In-Fe-S Zn concentrate by oxidative acid leaching. Compared with traditional high-pressure leaching technique, the method obviously reduces the operation temperature and pressure. Ore slurry composed of Zn concentrate, surfactant and sulfuric acid aqueous solution is operated at 95-105 deg.C under 0.2-0.4 MPa. The surfactant is sodium or calcium lignosulfonate, which can change the hydrophobicity of sulfide and sulfur, raise the leachin speed, and improve the suspension fluidity of the ore slurry. Since the operation temperature is lower than the normal pressure boiling point of the solution system, normal rubber pipe pump can be used to replace oil diaphragm high-pressure slurry pump, and Ti heat exchanger and vacuum flash evaporator are not needed. The leaching rate of Zn and In is up to 95-99%, and the yield of S is higher than 80%. The leaching solution can be treated according to normal method to recover valuable components, with total recovery rate of In up to 90-95%.

The invention relates to the technical field of daily chemical products and in particular to a clean effervescent tablet with pesticide residue and bacteria removing effects and a preparation method of the clean effervescent tablet. According to the preparation method disclosed by the invention, a specific surfactant is combined with a special wet granulation process, so that the feasibility of the production process is ensured. The clean effervescent tablet has the advantages that no dryness or stickness is caused; the adhesion of foam to the surface of a disintegrating agent can be inhibited, the disintegration speed is increased and an effervescent effect is quickly exerted; in the disintegration and dispersion process, the efficient alkaline supplementing effect on a solution system is realized by synergizing a bacteria remover with an alkali-source supplement, fruit wax and pesticide left on vegetables and fruits can be effectively removed, and the aims of effectively removing escherichia coli and staphylococcus aureus are achieved. By using the alkali-source supplement with a special structural form, metal ions in the water body and on the surface of the vegetables and the fruits can be effectively chelated, the effects of softening the water body and chelating the metal ions are realized, and the deposition of calcium scales on the surfaces of cleaned materials is prevented; in addition, a variety of calcium scales or stains are dispersed, so that secondary pollution to tableware, the fruits and the vegetables caused by deposition is prevented.