30results about "Electrolysis components" patented technology

A method for treating a wastewater stream containing organic material or inorganic material comprising passing the wastewater stream to an anode or a cathode of a bioelectrochemical system to thereby alter the pH of the wastewater stream to: a) reduce the pH of the stream passed to the anode to minimise or suppress precipitation of dissolved cations; or b) increase the pH of the stream passed to the cathode to produce an alkaline stream; or c) reduce the pH of the stream passed to the anode to produce an acid containing stream. In one embodiment, a caustic soda solution is produced at the cathode and recovered for storage and subsequent use.

A method of enhancing the concentration of a first inorganic compound in a first aqueous solution of a first process of a heavy chemical plant, the method comprising (a) feeding the first solution having the first compound at a first concentration and a first water vapor pressure to an osmotic membrane distillation means comprising a hydrophobic, gas and water vapor permeable membrane separating (i) a first chamber for receiving the first solution, from (ii) a second chamber for receiving a receiver feed aqueous solution having a second water vapor pressure lower than the first water vapor pressure; (b) feeding the receiver aqueous feed solution to the second chamber as to effect transfer of water vapor through the membrane from the first chamber to the second chamber, and to produce (i) a resultant first solution having a second concentration of the first compound greater than the first concentration and (ii) a diluted receiver feed aqueous solution; and (c) collecting the resultant first solution. The apparatus and method are of particular value in electrolytic haloalkali production plants in offering reduced capital and operating re-concentration and dilution costs.

The invention discloses a solution preparation method for producing electrolytic manganese or manganese dioxide from low-grade manganese oxide ores. The solution preparation method comprises the following steps: pre-soaking low-grade manganese oxide ore powder in anode liquor discharged by an electrolytic system, removing non-manganese acid consumption substances such as iron, aluminum, calcium and magnesium, and filtering to obtain pre-soaking liquor and pre-soaking residues; uniformly mixing the pre-soaking residues and a carbon reducing agent such as pulverized coal, adding concentrated sulfuric acid, uniformly mixing to obtain mixed material; controlling initial sulfur acid concentration in the mixed materials to be higher than or equal to 70%, and automatically heating mixed material through reaction heat so that the mixed material is reduced and cured; mixing and leaching the cured material with the pre-soaking liquor, oxidizing and neutralizing soaked ore pulp, purifying and removing impurities; mixing a manganese sulfate solution obtained by filtering with an appropriate amount of an electrolysis additive, and performing electrolysis to produce metal manganese or manganese dioxide. According to the solution preparation method, since carbon reducing agents such as cheap and easily available coal powder are utilized for directly reducing manganese oxide ores at a low temperature, the energy consumption is low, the cost is low, and a smoke gas pollution problem is avoided; anode liquor is used for pre-soaking and removing non-manganese acid consumption substances such as iron, aluminum, calcium and magnesium, so that the acid balance of system is realized and the acid consumption is reduced.

The invention provides a stripping gold component which could remove gold from substrate, comprising: a stripping gold chemical compound; and a assistant conductive compound wherein said stripping gold chemical compound bonds with gold to form covalent bond to strip gold from said substrate, said assistant conductive chemical compound helps the electric conduction and decreases the voltage, said substrate would not be damaged after stripping gold from said substrate, and the stripping gold component is cyanide free.

The present invention relates to methods of assessing damage to cellular DNA including the type, frequency and/or distribution of the DNA damage in the genome. The invention further provides methods of evaluating DNA damage in a cell caused by an agent and/or event as well as methods of determining a subject's prior exposure to an agent and/or event that is known or suspected to cause DNA damage. Further provided are methods of determining whether a subject is at an increased risk for a disease or disorder as a result of cellular DNA damage.

The invention relates to a method for preparing a perylene polyimide derivative film in the technical field of photoelectric materials. In the method, hydrazine hydrate is used for replacing trifluoroacetic acid, a positive electrode deposition method is adopted, and a dense and uniform film is prepared with a low voltage of 0.5-5V and a low current of 0.02-5mA within a relatively short deposition time. Moreover, composite films conforming to various absorption ranges are prepared through changing the structure and the matching of the perylene polyimide derivative.

The invention relates to a method for preparing high-purity nanometer titanium dioxide by electrolyzing titanium trichloride. Specific to the defects of complex technological requirement and low purity of products of the present method for preparing nanometer titanium dioxide, the invention provides a method for preparing high-purity nanometer titanium dioxide by adopting electrolysis method with simple production technology and high purity of products. The method provided by the invention is finished in the following manner: a device for preparing the high-purity nanometer titanium dioxide by electrolyzing titanium trichloride comprises an electrolytic tank, electrolyte, an exhaust pipe and an electrode, wherein a titanium-based platinum electrode is adopted as anode; a graphite electrode is adopted as cathode; and a titanium trichloride solution is taken as the electrolyte. During an electrolytic process, the concentration of the titanium trichloride in the electrolyte is kept relatively stable and hydrogen peroxide is continuously added in the electrolytic process. During the electrolytic process, partial electrolyte is extracted and is subjected to centrifugal separation, thereby obtaining precipitate and liquid supernatant; the liquid supernatant is added into the electrolytic tank again and participates in electrolysis; and the precipitate is dried, thereby obtaining the high-purity nanometer titanium dioxide powder.

A process for the hydrometallurgical processing of manganese containing materials, the process characterised by the combination of a manganese dioxide containing feedstock and an acidic solution to form a leach solution, and passing a volume of sulphur dioxide gas through that leach solution, whereby the levels of dithionate ion generated in the leach solution are less than about 5 gl/l. Also described is a process for the production of electrolytic manganese dioxide.

An electrochemical planarization apparatus for planarizing a metallized surface on a workpiece includes a polishing pad and a platen. The platen is formed of conductive material, is disposed proximate to the polishing pad and is configured to have a negative charge during at least a portion of a planarization process. At least one electrical conductor is positioned within the platen. The electrical conductor has a first end connected to a power source. A workpiece carrier is configured to carry a workpiece and press the workpiece against the polishing pad. The power source applies a positive charge to the workpiece via the electrical conductor so that an electric potential difference between the metallized surface of the workpiece and the platen is created to remove at least a portion of the metallized surface from the workpiece.

The invention provides an electroplating copper plating system of a high-aspect-ratio printed wiring board and a copper plating method. The electroplating copper plating system comprises a fixed baseplate, a copper plating component basket and a copper plating master basket; at least one set of clamping grooves is symmetrically formed in two ends of the fixed baseplate; at least one copper plating component basket is movably arranged in the copper plating master basket; the clamping grooves are fixedly clamped with the copper plating master basket; the copper plating component basket is matched and connected with the copper plate master basket; a vibration motor is arranged on the fixed baseplate; and the vibration motor can be arranged in front of the clamping grooves or among the clamping grooves or on any sides of the clamping grooves. Through innovation of tools and change of operation modes, a production mode of once copper plating and once padpower is used for improving the problem of no copper in holes with high aspect ratio; in particular, the system relates to design of the copper plating component/master basket of key parts thereof, installation of the vibration motor and the baseplate, matched application method of each equipment and control indexes of each key item, and guarantees the electrical test after downstream procedure assembly; and meanwhile, through the manufacturing mode of once copper plating and once padpower, the production efficiency is improved, and the manufacturing cost is reduced.

The invention provides a copper pre-plating method, a copper plating method and a copper plating device for a superconducting strip. The copper plating device for the superconducting strip comprises a discharging mechanism, a first cleaning mechanism, a copper pre-plating mechanism, a bright copper plating mechanism, a sand surface copper plating mechanism, a second cleaning mechanism, a passivation mechanism, a drying mechanism and a collecting mechanism. The discharging mechanism is used for unwinding the machined strip, the machined strip sequentially passes through the first cleaning mechanism, the copper pre-plating mechanism, the bright copper plating mechanism, the sand surface copper plating mechanism, the second cleaning mechanism, the passivation mechanism and the drying mechanism during machined and is wound on the collecting mechanism, the copper pre-plating mechanism adopts first current electroplating treatment, the bright copper plating mechanism adopts third current electroplating treatment, and the sand surface copper plating mechanism adopts second current electroplating treatment. By adopting the design of copper pre-plating, copper plating and the like, the problem that a superconducting layer is corroded by liquid is solved, and meanwhile, the electroplated superconducting strip is good in quality and high in electroplating efficiency.

The invention discloses a method of purifying perfluoromethyl cyclohexane. The method comprises the following steps of: (1) neutralizing a perfluoromethyl cyclohexane crude product prepared by an electrofluorination method with aqueous alkali till an upper water phase is neutral, standing for liquid separation, and transferring a lower layer organic phase to a distillation kettle, (2) performing simple distillation, (3) performing extraction, (4) performing deep fluorination: supplying fluorine and nitrogen gas mixture into components after extraction for reaction for 0.5-10h at -20-10 DEG C, supplying nitrogen to purge and replace the gas mixture, (5) performing alkali disliquid: transferring fluorinated perfluoromethyl cyclohexane into a reaction kettle, adding an alcohol-alkali-water solution at a mass ratio of 1:1:1 into the reaction kettle, performing reflux for 10h, taking and drying the lower layer organic phase, (6) performing rectification, and (7) performing multistage adsorption-desorption. The method is suitable for purifying the perfluoromethyl cyclohexane crude product prepared by the electrofluorination method, simple in flow and easy to operate; industrial production is easy to realize; the purity of a prepared product reaches 99.9% or above.

The invention provides a novel electroplating hanger comprising a main rod and a supporting rod, wherein a hanging hook is arranged at the upper end of the main rod, the supporting rod is vertically fixed with the main rod in a welding mode, lifting-hook-shaped connecting components are arranged on the supporting rod, and the connecting components are rotatably connected with the supporting rod by virtue of a rotating shaft at the end part. The novel electroplating hanger provided by the invention is simple in structure and strong in universality, can be used for processing a plurality of parts at the same time, and can greatly improve the working efficiency; because the connecting components are movably connected with the supporting rod, the number of the connecting components can be increased or reduced according to the actual needs, and the angle of each connecting component can be freely adjusted by virtue of the rotating shaft, so that the novel electroplating hanger is convenient to produce, and is suitable for the requirements of large-scale industrial production.

The invention provides a recycling method of a copper-indium-gallium-selenium waste material. The material recycling method comprises the steps of mixing the copper-indium-gallium-selenium waste material with chloride, and conducting uniform stirring, so that a pretreated material is obtained; conducting first-stage chloridizing roasting, wherein under the conditions of the chlorine gas atmosphereand the temperature ranging from 200 DEG C to 300 DEG C, the pretreated material is roasted, so that chloride gas containing selenium and gallium and roasting slag containing copper and indium are obtained; and conducting second-stage chloridizing roasting, wherein under the conditions of the chlorine gas atmosphere and the temperature ranging from 550 DEG C to 650 DEG C, secondary chloridizing roasting is conducted on the roasting slag which remains after the first-stage chloridizing roasting and contains the copper and the indium, so that indium-containing chloride gas and copper-containingroasting slag are obtained. According to the recycling method, a chloridizing roasting step-by-step volatilization method is adopted for separating and purifying the copper, the indium, the gallium and the selenium; separation and purification are achieved through volatilization of the metal chloride; the separation effect is good; a small amount of chemical reagents is consumed; and waste waterdisposal is easy to conduct subsequently .

A method of eluting biomolecules, such as nucleic acids from a biological sample by electroelution is provided. An example of a method includes various steps, such as loading the biological sample to a device comprising a housing, at least two conductive redox polymer electrodes operationally coupled to the housing and a biomolecule impermeable layer disposed on at least one of the electrodes. The loading of sample is followed by initiating an electrical connection to generate an electric field strength sufficient to elute biomolecules from the biological sample; and eluting the biomolecules from the biological sample.

The invention discloses an elastic supporting protection type electroplating hanger. The elastic supporting protection type electroplating hanger comprises an electroplating device body, wherein an electroplating hanging seat is arranged at the upper end of the electroplating device body; a lifting device is arranged at the upper end of the electroplating hanging seat; a sliding device is mounted at the top end of the lifting device; electroplating arms are mounted on two sides of the bottom end of the electroplating hanging seat; one end of each electroplating arm is fixed at the bottom end of the electroplating hanging seat; the other end of each electroplating arm vertically hangs down; a rigid spring body is mounted between the electroplating arms; and a reinforcing rib is further pushed into the end, which is connected with the rigid spring body, of each electroplating arm. By the mode, stability and firmness of the electroplating hanger can be improved, running stability of the electroplating arms can be guaranteed by the rigid spring body, and firmness degree of the electroplating arms can be guaranteed by the reinforcing rib pushed into the end, which is connected with the rigid spring body, of each electroplating arm.

This invention provides an apparatus for plating a strip material, which stably transports a lead frame and passes an electric current by using a current-passing and transporting wire, and has a simplified configuration. This plating apparatus comprises a plating tank 1 and the conductive wire 4 substantially horizontally suspended so as to pass through the inside of the plating tank. The conductive wire supports strip materials 5 and passes them through the inside of the plating tank to make them electrolytically plated. The conductive wire has a mounting portion 17 on the top surface for supporting the lower side of strip materials which stand straight, and a position-controlling member 7 which controls the fall of the strip materials mounted on the mounting portion of the conductive wire toward a transverse direction, and is placed along a passage of the conductive wire in a section in which the strip material is mounted.

This invention relates to the preparation of benzaldehyde by using nanometer manganese oxide (MnO2). It contains steps of: (1), providing an electrolytic bath with its anode chamber and cathode chamber, with positive electrode and negative electrode respectively, and isolated from each other by cation-exchange membrane; (2), adding manganese sulfate solution and phenylmethanol solution at optional ratio as electrolytic solution, and sulfuric acid solution is added into the cathode chamber as its electrolytic solution; (3), powering-on the electrodes to proceed the electrolytic reactioin, at the same time agitating the electrolytic solution in cathode chamber; (4), providing an ultrasonic generator, putting said electrolytic tank into said ultrasonic generator equipment, making the electrolytic reaction being proceeded under the ultrasonic wave; (5), the above mentioned equipment is placed in the condition of 60-95 deg.C for 0.5-3 Hrs; (6), the liquid product is then subjected to procedures of extraction, vacuum distillation to produce the final product benzaldehyde.

The invention provides a lifting mechanism of a slow-drawing groove. A driving mechanism is arranged at one side of a slow-drawing groove body, wherein the driving mechanism comprises a guide rod assembly, a sliding plate assembly and a driving part; the sliding plate assembly is slidably connected to the guide rod assembly and is driven by the driving part to move along the length direction of the guide rod assembly; a cross beam is fixedly arranged on the sliding plate assembly; ends of a plurality of frame plates are detachably arranged on the cross beam; and the frame plates are provided with hangers in a hangig mode. Compared with the prior art, lifting of the multiple frame plates is achieved through the cross beam of the lifting mechanism, and structural stability is improved through a double guide rod structure, so that the bearing capacity of the cross beam is improved.

The invention discloses a resource recycling method of a byproduct mirabilite. The invention belongs to the technical field of byproduct mirabilite treatment. The resource recycling method of a byproduct mirabilite comprises the following steps: S1, adding an alkaline substance into a sodium sulfate solution with the mass concentration of 150-350g/L to adjust the pH value, and adding sodium carbonate to primarily remove calcium and magnesium ions in the solution; S2, precisely filtering the solution and then carrying out cation exchange to deeply absorb calcium, magnesium and other metal ions;S3, precisely filtering the solution again, then feeding the solution into an electrolytic cell for electrolytic treatment, preparing alkali liquor from a cathode, recycling the alkali liquor to other working sections, and preparing acid liquor from an anode; and S4, carrying out acid-salt separation on the anode liquor, and recycling the separated acid to other working sections. According to theresource recycling method of the by-product mirabilite, acid and alkali are prepared through membrane electrolysis, the generated acid and alkali can be reused in other working sections on site, andresource recycling is achieved.

The invention discloses an electrochemical polishing liquid supply device. The device comprises a cavity, a first polishing liquid tank, a second polishing liquid tank, a first nozzle, a second nozzle, and a power supply, wherein the cavity is provided with a liquid discharge opening. The first polishing liquid tank is filled with polishing liquid, and is connected to the liquid discharge opening of the cavity. The second polishing liquid tank is filled with polishing liquid. The upper opening of the first nozzle is arranged in the cavity, the lower opening of the first nozzle is arranged in the first polishing liquid tank, and the first nozzle can spray the polishing liquid in the first polishing liquid tank onto the surface of a wafer to be polished through the upper opening. The upper opening of the second nozzle is arranged in the cavity, the lower opening of the second nozzle is arranged in the second polishing liquid tank, and the second nozzle can spray the polishing liquid in the second polishing liquid tank onto the external rim of the wafer to be polished through the upper opening. The negative pole of the power supply is electrically connected to the first nozzle, and the positive pole of the power supply is electrically connected to the second nozzle.

The invention discloses a method for stripping an electrophoretic coating on the surface of a hanger. The method comprises the following steps of immersing the titanium hanger with the electrophoreticcoating attached to the surface into an acidic electrolyte as a first electrode; using a conductor as a second electrode to be immersed into the acid electrolyte; taking out the titanium hanger and the conductor after the titanium hanger and the conductor are subjected to chemical reactions in the acid electrolyte; forming electric connection between the titanium hanger and the conductor, and ensuring that the standard electrode potential of the titanium hanger is higher than that of the conductor. The method has the advantages of being low in energy consumption, non-toxic and harmless and capable of completely removing the electrophoretic coating.