197 results about "Strong electrolyte" patented technology

A dimensionally stable, highly resilient, hybrid copolymer solid-solution electrolyte-retention film for use in a lithium ion battery in one preferred embodiment has a predominantly amorphous structure and mechanical strength despite contact with liquid solvent electrolyte. The film is a thinned (stretched), cast film of a homogeneous blend of two or more polymers, one of which is selected for its pronounced solvent retention properties. A very high surface area inorganic filler dispersed in the blend during formation thereof serves to increase the porosity of the film and thereby enhance electrolyte retention. The film is soaked in a solution of liquid polymer with liquid organic solvent electrolyte and lithium salt, for absorption thereof. Use of a cross-linked liquid polymer enhances trapping of molecules of the electrolyte into pores of the film. The electrolyte film is sandwiched between flexible active anode and cathode layers to form the lithium ion battery. Novel methods are provided for forming the electrodes, the polymer substrate, and other elements of the battery.

The invention discloses a composite diaphragm for a battery and a preparation method thereof, belonging to the field of electrochemical cells. The composite diaphragm is a multilayer composite diaphragm structure composed of a conducting layer / a polymer layer or a conducting layer / a polymer layer / a conducting layer, wherein the conducting layer mainly comprises a carbon material or a conductive polymeric material and forms a film on a single surface or double surfaces of a polymer diaphragm. The composite diaphragm has the following characteristics: the conducting layer has strong electrolyte adsorption and storage capability, the process of ion transport is shortened, and large-current charge and discharge performance of the battery is improved; when the composite diaphragm is used in a metallic lithium battery, the conducting layer in the composite diaphragm contacting with metallic lithium can alleviate nonuniform corrosion on the surface of lithium and inhibit formation of lithium dendrite crystals. The preparation method for the composite diaphragm is simple and easily controllable, can realize large-quantity and low-cost industrial preparation of the composite diaphragm and has a high application value.

The invention relates to a deicing method for a high-voltage power transmission line and a device. The device is located on a supporting plate of a travel carriage on the high-voltage power transmission line and fixedly provided with an electrolytic cell filled with strong electrolyte solution and the like. The storage battery is charged continuously through electromagnetic inducing electrical energy which is from a solar cell panel and is generated under wind power or movement of three electromagnetic induction coils that are suspended on a beam and from a solar cell plate. The storage battery is connected with the electrolytic cell. Hydrogen and oxygen generated by the electrolytic cell enter a combuster through a delivery pipe, a one-way valve, a polycarbonate pipe and a lock net adaptor, respectively; a spring sheet metal and a thin plate that form an ice and snow detector as well as an electrode connected with a power line of a high-voltage boosting circuit below the reed pipe are arranged at the top of the combuster below the high-voltage transmission line. When the thin plate is covered by ice, and elastic metal and thin plate bend downwards, the free end and the magnetic block at the top of the combuster attract each other, and the power line of a high-voltage boosting circuit is switched on. Mixture of hydrogen and oxygen in the combuster combusts so that the piston body in the combuster strikes the high-voltage transmission line to enable the ice and snow to fall off.

The invention discloses a ceramic coating membrane and a preparation method thereof. The steps are as follows: the preparation of stem grafting ceramic powder, the preparation of functional power containing lithium-ion, the preparation of coating slurry and the preparation of ceramic coating membrane. The preparation method of ceramic coating membrane, provided by the invention is that: benzene sulfonate containing lithium is grafted on the surface of the ceramic powder, and then the ceramic powder grafted is coated on a polyolefin microporous membrane, thereby obtaining the ceramic coating membrane is obtained. The preparation method has the advantages of simple process, low requirements to equipment, easiness in condition control and low cost, and is suitable for industrial production. Due to the ion exchange capacity and hydrophily of the ceramic coating membrane prepared by the method, the ceramic coating membrane has a strong electrolyte infiltrating capability, is high in membrane breaking temperature, and has improved safety.

The invention provides a super-durable and super-hydrophobic textile and its making method. The method comprises the following steps: carrying out alkaline treatment of a terylene fabric to make the surfaces of micro-sized fibers have a nanometer rough structure and make the fabric have a micro-nano structure rough surface, and carrying out low surface energy treatment of the fabric by a mixed solution comprising long-chain alkyl silane and a polydimethylsiloxane compound to obtain the super-durable and super-hydrophobic textile. The static contact angle of water drops on the surface of the terylene fabric prepared in the invention is greater than 150DEG, the water drops can easily roll on the surface of the fabric, and the textile still has an excellent super-hydrophobic performance after strong friction, long-time washing, and long-time immersion in a strong acid, a strong alkali and a strong electrolyte solution.

The invention discloses a preparation method for synthesizing a thickening agent by acrylic ester. The thickening agent synthesized by acrylic ester comprises crylic acid, acrylamide, 25 percent of ammonia water, a functional monomer, EDTA, deionized water, tasteless kerosene, 3<#> white oil, diallyl phthalate, ammonium persulphate, Span 80 and isomeric hexadecanol polyethenoxy ether, wherein the functional monomer is prepared from alicyclic amine polyethenoxy ether, methyl methacrylate, nitroxide free radical pipradrol and sodium methoxide. The preparation method synthesizes a special weak cation type (methyl) acrylic ester functional monomer by adopting an ester exchange method, and the functional monomer and vinyl monomers of the acrylic acid, the acrylamide, and the like are adopted to synthesize a textile printing thickening agent by adopting inverse emulsion polymerization. The thickening agent has the characteristics of high thickening capacity, strong electrolyte resistant capacity and good water-retaining property.

A system and apparatus for enhancing convection in electrolytes for improved electrodeposition of copper and other non ferrous metals in industrial electrolytic cells at given a current density providing exact geometric locations of the electrolyte jet infeed supply system used to impart forced convection in the electrolyte, the gas bubbling system for low pressure / low volume convection enhancement, and the electrode bottom and lateral distancing system, and range of operational parameters, for correct electrolyte flow and air bubbling flow improving cell productivity, quality of metal plates with increased electrical efficiency for its industrial application. The system and apparatus can also be used in industrial cells with same optimal results but at increased current densities, provided sufficient suitable electrolyte and additional electric power is available.

The invention provides a method for electrochemically modifying surface of ultrasonic-enhanced carbon fiber. The method comprises the following steps of: firstly, pretreating the surface of the carbon fiber material, secondarily, soaking the pretreated carbon fiber material into an electrolytic bath filled with strong electrolyte solution; and by taking the carbon fiber material as an electrochemically oxidized anode and graphite as an electrochemically oxidized cathode, guiding in current through control of a voltage-stabilizing power supply, wherein the current intensity is 1A / g-2A / g; and under the conditions of ultrasonic power of 200W-2000W, ultrasonic frequency of 20kHz-100kHz, and water bath temperature of 20 DEG C-70 DEG C, carrying out ultrasonic oscillation for three minutes to 15 minutes to produce surface modification, and finally washing and drying to obtain surface-modified carbon fiber. With the method, the surface roughness of the carbon fiber can be increased, the wetting property of the carbon fiber can also be improved due to introduction of polar group into the surface of the fiber, the binding property between the carbon fiber and a resin matrix can be enhanced, and the interface property of binding the carbon fiber with other materials can be increased.

The invention discloses a preparation method and applications of a battery graphene-base current collector, and belongs to the field of electrochemical battery. The provided current collector is suitable for lithium ion battery and lithium-sulfur battery, is prepared by dispersing graphite, subjecting graphite to suction filtration, and rolling the graphite, has a thickness of 15 to 25 [mu]m, and has high mechanical strength. When the provided graphene-base current collector is applied to a lithium ion battery or a lithium-sulfur battery, the weight of the lithium ion battery or the lithium-sulfur battery is effectively reduced, the energy density of the lithium ion battery or the lithium-sulfur battery is improved. Moreover, the provided current collector has a very strong electrolyte absorbing and storing performance, so the strong current charging / discharging performance of battery using the provided current collector is improved, and the properties of multiple electrode materials are all largely improved. The preparation process of the provided current collector is simple and controllable, and furthermore the preparation method can be applied to massive and low-cost industrial production, and thus has a high application value.

The invention relates to the technical field of extraction and separation, in particular to a method for extracting and separating ions in two valence states of the same element in three phases. The method comprises the following steps of: 1) adding water-soluble high polymer, inorganic strong polyelectrolyte salt and a coordinating agent in turn into aqueous solution containing the ions in two valence states of the same element, and fully mixing to obtain mixed solution; and 2) regulating the pH of the mixed solution in the step 1), adding an organic extracting agent immiscible with water, fully mixing, standing and centrifuging to obtain a liquid-liquid-liquid three-phase system with coexistent upper layer, middle layer and lower layer, wherein the upper layer is an organic phase, the middle layer is an aqueous phase of the high polymer and the lower layer is an aqueous phase of the inorganic strong polyelectrolyte salt, and the ions in the two valence states are respectively extracted into the upper, middle or lower layer to realize the extraction and separation of the ions in the two valence states of the same element. By the method, the same element in two valence states is finely separated, and the problem of low recovery rate in a liquid-liquid extraction process is solved.

The invention relates to an electroconductibility single-hole diluting method for detecting seepage speed, which belongs to the field of seepage and underground water motion observation. The method comprises the following steps of: selecting a hole measurement position and drilling; selecting a tracing agent according to the difference of electroconductibility of scene drilling water; detecting arelation between the electroconductibility and the concentration of a tracing agent solution in a laboratory; filling the tracing agent solution into a hole; measuring the electroconductibility of the water in the drilled hole; and calculating the seepage speed by the variation rate of the measured electroconductibility. The method has simple, convenient and reliable operation, clear principle, simple, convenient and safe measurement process, accurate and reliable result, environmental protection and safety, selects the tracing agent from a nontoxic strong electrolyte solution or a deionized aqueous solution and can fully replace the traditional radioactive single-hole flow speed detecting method.

The present invention provides a reinforced electrolyte membrane for fuel cell comprising a porous substrate impregnated with a polyelectrolyte liquid dispersion, wherein either the maximum tensile strength in the machine direction (for sheet processing) (MD) or the maximum tensile strength in the transverse direction (TD; vertical to the MD direction) for the electrolyte membrane is 70 N / mm2 or more at 23° C. at a relative humidity of 50% or 40 N / mm2 or more at 80° C. at a relative humidity of 90%. This reinforced electrolyte membrane for fuel cell, in which the amount of fluorine ions eluted as a result of deterioration of electrolyte membrane components in particular is reduced, has excellent durability.

The invention discloses a method utilizing nitric acid type solder stripping waste water to synthetize zinc hexahydroxystannate, which comprises the following steps that: (1) strong electrolyte and settling agent are added in the nitric acid type solder stripping waste water, so the tin compound in the waste water is precipitated, and then the tin sludge is obtained through filtration; (2) the obtained tin sludge is reacted with the concentrated hydrochloric acid to make the tin sludge convert into the tin ionic condition; (3) the tin ion which is in the ionic condition is reacted with the zinc salt under a certain condition to synthetize the zinc hexahydroxystannate compound; (4) the solution is cooled to the room temperature after the reaction is completed, the supernatant liquor is removed through centrifugal separtion, so the obtained material is cleaned via the distilled water; and (5) after the cleaning, the final zinc hexahydroxystannate is obtained through filtration and drying at intermediate temperature. No harmful substances to the environment are generated during the whole synthetization process, and the obtained material is the synthetic material of an environment-friendly plastic fire retardant, a smoke inhibitor and a sensor. The purposes of resource cyclic utilization, low emission and green and environmental-friendly production are realized.

The invention discloses a chemically stable low-oil-adhesiveness oil-water separating member, and a making method and a use thereof. The separating member comprises a substrate having a plurality of through holes with the aperture of 100-2000 meshes, and nanometer laminas at least growing on the surface layer of the substrate and the walls of the thorough holes in an in-situ manner, each of the nanometer laminas is composed of a plurality of metal hydroxides and / or metal oxide nano / micro sheets, and the vertical height and the transverse width of the nano / micro sheets are 20nm-2mum and 100-2000nm respectively. The separating member can be made through a strong electrolyte environment induced oxidation ethod. The separating membrane has the characteristics of super hydrophilicity, underwater super oleophobicity and low oil adhesiveness, can be used for purifying oil-water mixtures, such as industrial or domestic sewage, can separate and remove oil drops dispersed in water, and has the advantages of efficient and rapid separation, no need of outside force driving, easy cleaning, good contamination resistance, simple preparation technology, wide material sources, low cost, easy realization of the large scale production, and adaptation to the industrial application.

The invention relates to a carrier brightening agent for the potassium chloride galvanization. The carrier brightening agent is fatty alcohol polyoxyethylene ether sulfonate with a structural formula of RO(CH2CH2O)n(CH2)2SO3M or alkylphenol ethoxylate sulfonate with a structural formula of RC6H4O(CH2CH2O)n(CH2)2SO3M, wherein R represents C6 to C14 saturated alkane; n is an integral number in the range of 5 to 30; and M represents alkali metal. The invention also provides a preparation method of the carrier brightening agent. The carrier brightening agent for the potassium chloride galvanization, which is provided by the invention, not only can have an effect of a nonionic surfactant serving as the carrier brightening agent, but also has a high stability in strong electrolyte. Meanwhile, according to the preparation method of the carrier brightening agent, which is provided by the invention, a two-step method is adopted to synthesize the carrier brightening agent, the process is easy to control, the production is easy to implement, the conversion rate is over 90 percent, the cost is low and the preparation method has a strong practicality.

The invention discloses an asphalt-based nanoporous carbon material, a negative material thereof, and a lithium ion battery. The asphalt-based nanoporous carbon material is prepared by mainly using 0.1-10g of asphalt, 3-50g of anhydrous aluminum trichloride, 100-400ml of anhydrous carbon tetrachloride and 200-500ml of a reaction terminating agent, and the amounts of the above raw materials can be freely adjusted in proportion. The asphalt-based nanoporous carbon material is prepared by mainly using asphalt, anhydrous aluminum chloride, anhydrous carbon tetrachloride and the reaction termination agent, and asphalt and anhydrous carbon tetrachloride undergo a Friedel-Crafts crosslinking reaction through a nanometer pore forming technology, so the obtained asphalt-based carbon material has a porous structure and a high specific surface area, and the negative material prepared by using the asphalt-based nanoporous carbon material has the characteristics of strong electrolyte imbibition and retention ability, good processing performance, low price and the like, and can greatly improve the cycle performances of the lithium ion battery.

Provided are a self-driven liquid metal machine and the application of the self-driven liquid metal machine. Liquid metal of gallium or gallium and indium alloy or gallium, indium and tin alloy or gallium, indium, tin and zinc alloy is dropwise added to a strong electrolyte ion solution like a NaOH solution, an HC1 solution, a Na2CO3 solution and a NaC1 solution at specific temperature and concentration; an aluminum sheet adheres to the liquid metal for chemical reaction and electrochemical corrosion, bubbles are generated, and chemical energy is released and converted into kinetic energy so as to drive the liquid metal to move, wherein the driving force can make the liquid metal to move automatically instead of intervention of external energy, can drive small-size rotors or other things to move, and can also convey liquid to provide power for small-size pumps or small-size blenders, so that the machine is driven without replying on external energy, machine design is greatly simplified, the gap that energy is supplied automatically to drive objects to move is filled in, and the machine has wide application prospects. The self-driven liquid metal machine can greatly promote progress of the design of flexible robots and flexible drive machines, the micro-channel chip technology and the like.

The invention relates to a method for synthesizing an electrolyte-resistant thickener by using an inverse emulsion. The method comprises the following steps: adding water-soluble monomer acrylamide and a cross-linking agent to neutral water-soluble unsaturated carboxylic acid to form an aqueous phase; adding a hydrophobic functional monomer and an emulsifier to the solvent to form an oil phase; mixing and emulsifying the aqueous phase and the oil phase to form a water-in-oil emulsion, adding an initiator, heating the mixture to initiate polymerization, decompressing and distilling the mixture, and adding a phase transfer agent to obtain the product. The novel thickener synthesized by the method has good thickening effect with 3 percent of white pulp viscosity up to 106000mp.s, strong electrolyte-resistant ability with viscosity retention rate up to 45.3 percent, and simple process with stable and easily controlled reaction process.

A method for preparing a magnesium alloy transmission electron microscope sample relates to a method for preparing a metal transmission electron microscope film sample. The invention is characterized in that the preparation process uses the electrolyte containing the components with volume proportions as follows: 8-12% of nitric acid, 55-65% of methanol or ethanol, and 25-35% of propanetriol, propanediol or glycol, and the sample is thinned by using an electrolyte double spraying method; electrolysis double spraying is carried out at a voltage of 15-25V and the temperature is controlled between -35 DEG C and -20 DEG C. By adding the propanetriol and electrolyzing at a low temperature, the sample surface oxidation by strong electrolyte acid can be effectively avoided. The method has the advantages of no stress in thinning process, high thinning speed, no erosion and large thinning area of the sample surface, and the like; and the method is applicable to quick and large preparation of high quality magnesium alloy film samples.

The nanometer porous metal catalyst is alloy sheet of thickness 0.1-100 microns, width 0.1-20 microns and length 0.1-100 cm, in double-continuous nanometer porous structure of pore size and wall size 2-100 nm, comprising Au 80-100 at.% and Ag 0-20 at.%, and covered with black gold oxide. The preparation process of the nanometer porous metal catalyst is also disclosed, and the nanometer porous metal catalyst is prepared through electrochemical corrosion of alloy material inside strong electrolyte solution and via voltage. The nanometer porous metal catalyst has great specific surface area, and preparation process is simple and has convenient operation, high repeatability, no loss of noble metal material and other advantages.

The invention discloses methods for preparing silver nano-particles and a conductive film of the silver nano-particles. The method for preparing the silver nano-particles comprises the following steps of: 1) dripping an aqueous solution of sodium salt or potassium salt of ethylenediaminetetracetic acid into an aqueous solution of soluble silver salt until the solution is changed from turbidity to clarity, and stopping dripping to obtain a silver salt solution of an ethylenediaminetetracetic acid chelate ; and 2) dripping an aqueous solution of a reducing agent into the silver salt solution of the ethylenediaminetetracetic acid chelate under stirring condition, continuing reacting after the dripping is finished until the color of the solution is not changed, and thus obtaining the silver nano-particles. The method for preparing the conductive film comprises the following steps of: dispersing the silver nano-particles prepared by the method into water, coating a dispersion liquid on a substrate, and drying to obtain a silver nano-film; and soaking the silver nano-film in a strong electrolyte solution and treating for at least 3 seconds, taking out, and drying to obtain a film consisting of clinkery silver nano-particles. The silver nano-film has excellent electrical conductivity.

The invention discloses a method for improving the dispersion property of nanosilicon grinding fluid. The technical problem to be solved is to improve the storage and processing performances of nanosilicon. The method comprises the following steps: adding a dispersion medium to silica fume to obtain silicon grinding fluid; adding a grinding medium to the silicon grinding fluid to obtain sand grinded silicon grinding fluid; and adding an anionic dispersing agent to the sand grinded silicon grinding fluid to obtain nanosilicon grinding fluid. Compared with the prior art, the strong electrolyte anion dispersing agent adsorbed and dispersed on nanosilicon particles is used to modify the nanosilicon particles. The anion is adsorbed on the nanosilicon particles to enable the nanosilicon to have negative charges. Repulsive force between the negative charges makes the nanosilicon particles disperse and suspend in the dispersion medium, so that the dispersion property of nanosilicon in nanosilicon grinding fluid is improved and the nanosilicon is prevented from reuniting in the processes of storage and using, thereby improving the storage and processing performances.

The invention discloses a thickening agent having the advantages of good water holding property, strong electrolyte resistance and high color yielding rate and a production process having the advantages of simple process, environmental protection and energy saving. The process with the following raw material components and weight ratios comprises the following steps of: neutralizing 200g of acrylic acid and 40g of methacrylic acid by using 350g of 32 percent sodium hydroxide to a pH value of 6.3-6.4; mixing 60g of acrylamide, 0.3g of N-N' methylene-bisacrylamide and 1.4g of potassium persulfate as an initiator into a water phase; adding 200g of white oil or aviation coal, 30g of sorbitan monooleate, 5g of butyl acrylate into a reactor and mixing to prepare into an oil phase; adding the water phase to the oil phase for emulsifying for 10 minutes and then adding 0.4g of sodium hydrosulfite to begin a polymerization reaction; heating up to 90 DEG C, preserving heat for 1 hour and then cooling to 40 DEG C; and adding 30g of fatty alcohol-polyoxyethylene ether and 20g of hydrophilic silicon oil to the reacted and cooled material and sufficiently mixing. The invention is suitable for thickening agents and production thereof.

The invention discloses a method for treating a solution containing trace mercury ions and a solid-phase extraction adsorbent used therein. The method comprises: 1. preparing a solid phase extraction adsorbent; 2. using the solid phase extraction adsorbent to adsorb mercury ions in a solution containing trace amounts of mercury ions; 3. eluting the mercury ions adsorbed on the solid phase extraction adsorbent with hydrochloric acid solution, And make this hydrochloric acid solution become the eluent containing mercury ion. The solid phase extraction adsorbent is at a temperature of 55°C to 65°C, in the presence of a strong electrolyte with an ionic strength of 0.025mol / L to 0.035mol / L dissolved in water and under the action of sodium lauryl sulfate The method is obtained by modifying nano-titanium dioxide with thiourea; the nano-titanium dioxide is anatase-type nano-titanium dioxide. The method of the invention is convenient to operate and has good mercury ion enrichment effect. The solid-phase extraction adsorbent has good adsorption selectivity to divalent mercury ions and large adsorption capacity.

The invention discloses a conductive ceramic, a method for preparing the same and an application for the same. The conductive ceramic comprises a conductive agent, a ceramic composite material and a dielectric material, wherein the conductive ceramic contains, in parts by weight, 5-20 parts of conductive agent, 55-70 parts of ceramic composite material and 5-15 parts of dielectric material. The conductive ceramic is used for loading an acidic carrier, as well as has very strong adsorption force and corrosion resistance on active substances and strong electrolyte; and the electric conductivity of the conductive ceramic is the double of that of pure metallic titanium and two orders of magnitude higher than that of graphite. The conductive ceramic grid prepared from the material is used for replacing traditional lead-based grid, and only the good characteristics and mature process of 'single-substance bipolar salinization' for the active substances of traditional lead battery are kept, so that the parameters of specific energy, charge-discharge time, deep cycle life, cost / effectiveness ratio and the like of whole battery are superior to those of nickel metal hydride battery.

An epoxypropane / epoxypropane block copolyether of high-effective disperser is represented as the formula at right, wherein b1+b2+b3=40-60, a1+a2+a3=15-25. The epoxypropane / epoxypropane block copolyether will not be dissociated into ion state in water and is in state of ether linkage, while the oxygen atom and hydroxyl of the chain can generate hydrogen bond with hydrone to obtain high stability and avoid the effect of strong electrolyte and obtain better emulsion, disperse, humidification and solubilization characters, therefore, the block polyether high-effective polyether high-effective disperser which uses castor oil as starting oil has better emulsion and disperse effects than the Pluronics block polyether which uses propanediol as starting agent, caused by hydrophobic castor oil, with wide application in agricultural chemical aqueous-base agent. The invention discloses a relative preparation method.

The invention provides an inkjet printing thickener and a method for preparing the same. The method for preparing the inkjet printing thickener comprises the following steps: mixing aqueous ammonia with an acrylic monomer until the pH value of the mixture is 6.5-7, adding a cross-linking agent, stirring and mixing to prepare a water phase; mixing an emulsifier with an organic solvent to prepare an oil phase; adding and stirring the water phase to the oil phase, dropwise adding aqueous initiator solution, polymerizing for 1-4 hours at 50-80 DEG C, reducing temperature, discharging, adding a phase transfer agent, and stirring fully and uniformly to obtain the finished product. The inkjet printing thickener provided by the invention has high solid content, moderate viscosity and strong electrolyte resistance and can be used by adopting a padding process during pre-treatment for inkjet printing to ensure that the printed patterns have clear outlines, deep color and no infiltration.

The invention relates to the technical field of metallic ion extraction and separation, particularly a liquid-liquid-liquid three-phase extraction and separation method of enriched iron in a middle phase. The method comprises the following steps: (1) reducing Fe<3+> in an ferric ion water solution into Fe<2+>; (2) sequentially adding phenanthroline, water-soluble high molecular polymer and inorganic strong electrolyte salt into the solution obtained in the step (1), and sufficiently and evenly mixing to obtain a mixed solution, wherein the mol ratio of phenanthroline to Fe<2+> is (3-8):1; and (3) regulating the pH value of the mixed solution obtained in the step (2) to 1.0-6.0, adding a water-insoluble organic reagent, thoroughly mixing, standing, and centrifugalizing to obtain a three-phase system in which the upper, middle and lower layers coexist, wherein the phenanthroline and ferric ion complex enter the middle water phase containing the water-soluble high molecular polymer, thereby implementing liquid-liquid-liquid three-phase extraction and separation of enriched iron in the middle phase. The method provided by the invention can implement highly separation of target metal and iron.

The invention relates to a preparation method of one-dimensional pyromelane (crystalline) nanometer titanium dioxide. The preparation method has the following main steps: direct hydrolysis of titanic acid ester is firstly carried out in ammonia water containing strong electrolyte inorganic salt, and then one-step hydro-thermal treatment is carried out to prepare high purity pyromelane (crystalline) titanium dioxide nano-rods. The preparation method in the invention has concise preparation process, high purity of target product (the purity being more than or equal to 99%), stable performance and wide adjustable extent of parameters, thereby being a preparation method of high-purity pyromelane (crystalline) titanium dioxide nano-rods with commercial prospect.

The invention provides a grounding calcium bentonite-based resistance-reducing agent, comprising(according to mass percent) 1-99%calcium bentonite; 1-30% carbon fiber; 0.1-30% ammonium chloride; 0.1-30% calcium oxide; 0.1-30% zinc powder; 0.1-30% nickel powder; 0.1-60%ammonium persulfate; 0.1-15% sodium molybdate; 5-60% electroconductive cement; 0.1-6% grapheme; 0.1-30%aluminite powder; 0.1-60% aniline; and 0.1-15% sodium tripolyphosphate. The grounding calcium bentonite-based resistance-reducing agent is a physical grounding resistance-reducing agent, overcomes the disadvantage of difficulty in package and construction of a present resistance-reducing agent, solves the problems of stronger corrosivity of the strong electrolyte and strong acid and strong base in the present resistance-reducing agent, and the problem of incapability of long-term normal service of a grounding body, and is suitable for acid soil regions, mountain regions, rock, sand and high corrosion regions.