805results about How to "Improve electrolysis efficiency" patented technology

The invention discloses a method for recovering rare earth elements from neodymium-iron-boron wastes, which comprises the steps of: mixing the neodymium-iron-boron wastes with water and then grinding; oxidizing the ground neodymium-iron-boron wastes; carrying out the secondary grinding for oxidation products; leaching by adding acid; separating solid from liquid; extracting to remove iron; chloridizing rare earth; separating the rare earth by extraction; extracting to remove aluminum; sedimenting; and firing. The method applied to recovery of the rare earth has the beneficial effects that the rare earth recovery rate is increased by 5-8%; the use value of the recovered rare earth is improved so that the production cost of further processing is reduced; the problem of puree fused salt in the electrolysis of single rare earth is solved, and the electrolytic efficiency of the rare earth metal during electrolysis is improved and energy consumption is effectively reduced; and the contents of non rare earth metals, such as C, S, O and the like are reduced.

The invention discloses an auxiliary combustion system of a vehicle-mounted hydrogen and oxygen generator. The auxiliary combustion system comprises a hydrogen and oxygen mixed gas generator, a pulse power supply control board, a water storage tank and a pulse power supply; the hydrogen and oxygen mixed gas generator is an airtight metal container, plugged with a positive metal electrode and a negative metal electrode, filled with electrolyte and connected with a gas inlet of an engine through a gas guide tube; the water storage tank is connected with the hydrogen and oxygen mixed gas generator; the pulse power supply control board is respectively connected with the metal electrodes and the pulse power supply; the pulse power supply generates controllable alternating current through the pulse power supply control board, and the alternating current is added onto the electrodes in the hydrogen and oxygen mixed gas generator; and hydrogen and oxygen which are separated out by electrolyzing are together injected into the engine for assisting combustion. In the invention, the alternating current pulse power supply is adopted as an electrolysis power supply, thus the electrolysis efficiency is effectively improved; and closed-loop control is formed by adopting pressure, temperature and oxygen sensors so as to improve the efficiency of the engine, reduce the power consumption and reduce the discharge value.

The invention belongs to recovery treatment on lead plaster of a waste lead-acid storage battery. The method comprises the following steps of: mixing the lead plaster of the waste lead-acid storage battery with waste sulfuric acid in the waste lead-acid storage battery according to the design requirement and roasting; adding roasting sand in a stirring kettle; adding tap water to a water level line of the device and stirring the roasting sand; adding a proper amount of calcium acetate, acetic acid and nitric acid; starting a solution circulating system pump, leaching out the roasting sand and maintaining the concentration of lead acetate to be saturated; adding a proper amount of bone glue and beta-naphthol, electrolyzing immersion liquid, recovering the metallic lead at the cathode and recovering lead dioxide at the anode; press filtering residues to obtain lead-off slag and filtrate; and adding calcium carbonate in the filtrate and recycling. The device mainly comprises a leaching part, a press filtration part, a circulating part and an electrolysis part, and concretely includes eight key components of the stirring kettle, a press filter, an overflow port, an electrolysis direct current power supply, an electrolytic cell, a cathode titanium basket, a corrosion resistant pump and a heating element.

The invention relates to a metallurgy method of metal sulfide M1S; in the method, ionic liquid M2X is taken as electrolyte, metal sulfide is taken as a solid-state cathode, or the powder of metal sulfide added with electronic conduction matters or lumps and metal current collectors are compounded for being used as the solid-state cathode, graphite or inertia anode is taken as an anode, the electrolyte is carried out in inert atmosphere or air, the electrolyte temperature is controlled at 120-780 DEG C, the electrolyte time is controlled to lead the electrolysis electric quantity to reach theory needed theory electric quantity and above, the metal sulfide is decomposed into metal products and simple substance S by electrochemistry. The method has simple process, low energy consumption, high additional value of the product, wherein the prepared metal materials such as tantalum powder, tantalum, porous iron and other nanometer metal powder materials or superfine metal powder materials or porous metal materials can be directly used as hydrogen storage materials, battery materials, capacitor materials and the like or as the raw material for powder metallurgy and the like.

A diamond electrode includes a conductive silicon substrate having a plurality of pores. The diamond electrode also includes a conductive diamond covering the conductive silicon substrate. The inner wall surfaces of the plurality of pores are at an angle of 60° to 85° with respect to a substrate of the conductive silicon substrate.

The present invention belongs to the field of chemical preparing technology, and is especially direct electrochemical process of preparing ferrate. The preparation process prepares ferrate inside one diaphragm type cylindrical electrolytic bath with pure sodium hydroxide as electrolyte. While controlling electrolyte concentration, reaction temperature and applied voltage, high concentration sodium ferrate solution is first prepared, and potassium ferrate or barium ferrate is then prepared via adding potassium ion or barium ion. The present invention has simple technological process and low cost, and is suitable for large scale preparation of ferrate.

A method of producing in a bioreactor a biogas rich in methane involves electrolyzing water in an aqueous medium at a voltage in a range of from 1.8 V to 12 V in the presence of electrochemically active anaerobic microorganisms that biocatalyze production of hydrogen gas, and, contacting a species of hydrogenotrophic methanogenic microorganisms with the hydrogen gas and carbon dioxide to produce methane. Volumetric power consumption is in a range of from 0.03 Wh/L_R to 0.3 Wh/L_R. Current density is 0.01 A/cm_E² or lower. The voltage is sufficient to electrolyze water without destroying microbial growth. Such a method results in improved electrolysis efficiency while avoiding the use of noble metal catalysts. Further, a combination of water electrolysis with anaerobic degradation of organic matter results in increased biogas quality and in increased biogas quantity and yield. Oxidation of hydrogen sulfide contributes to the increased quality, while an increase in the rate of organic matter hydrolysis and an increase in the production of methane from hydrogen contributes to the increased quantity and yield.

Disclosed are an electrolysis vessel and an apparatus for generating electrolyzed water which are small in size, excellent in electrolysis efficiency, and enable to reduce the anion concentration in the acidic electrolyzed water. The electrolysis vessel comprises electrolysis chambers (10a, 10b) arranged opposite to each other with an ion-permeable separating membrane (2) interposed between, raw material water supply means (11a, 11b), electrodes (3a, 3b) so arranged as to have the separating membrane (2) between them, and electrolyzed water taking-out means (12a, 12b). The separating membrane (2) is an anion permeable membrane, and the electrodes (3a, 3b) are formed on respective sides of the anion permeable membrane (2) in an appressed manner, while leaving a portion of the anion permeable membrane (2) exposed. Only raw material water supplied to the cathode side electrolysis chamber (10b) contains an electrolyte. The electrodes (3a, 3b) are porous bodies and contain an electrode base composed of a powder titanium compound such as TiC or TiN, a catalyst such as platinum black or iridium black, and a binder such as PVA. The electrodes (3a, 3b) may have a mesh-like shape or a comb-like shape, and are formed by applying a conductive paste containing a conductive powder on respective sides of the anion permeable membrane (2) and heating or pressurizing the thus-applied paste.

The invention discloses a hydrogen-rich water electrolytic bath. The electrolytic bath is formed by an anode chamber and a cathode chamber which are formed inside an anode housing and a cathode housing which are fixed by screws; the anode chamber and the cathode chamber are separated by an ion exchange membrane; the anode chamber is connected with an anode water inlet and an anode water outlet which are formed on the anode housing; the cathode chamber is connected with a cathode water inlet and a cathode water outlet which are formed on the cathode housing; narrow flow passages for water to pass through are respectively formed inside the anode housing and the cathode housing; an anode electrode plate and a cathode electrode plate are respectively arranged inside the anode chamber and the cathode chamber; the cathode electrode plate is connected with a cathode interface formed on the cathode housing; the anode electrode plate is connected with an anode interface formed on the anode housing. The technical scheme disclosed by the invention can effectively improve concentration of dissolved hydrogen generated by electrolysis in water, and meanwhile, also improves water quality of the water.

Provided in the present invention are a rare earth metal and a rare earth metal alloy and a method for the preparation of these by molten salt electrolysis. In the method for the preparation of the rare earth metal alloy by molten salt electrolysis, the electrolyte is an alkali metal or the chloride-fused salt of an alkaline earth metal, the positive electrode is an inert electrode or graphite, the negative electrode is composed of a rare-earth metal oxide and the oxides of other alloy components and/or metal powders, and electrolysis is induced by the passage of a direct current. During the electrolytic process, the temperature of electrolysis is higher than the melting point of the rare earth metal alloy produced and lower than the melting point of the negative electrode; the surface layer of the positive electrode is in the first stage electrolyzed to a liquid metal film which accumulates to a certain volume before falling to the crucible at the bottom. The current density of the negative electrode is sufficient to separate out from said negative electrode the components of the rare earth metal alloy. The electrolysis voltage is lower than the decomposition potential of the electrolyte and higher than the decomposition potential of the oxides corresponding to each component of the rare earth metal alloy. A crucible is used to collect the rare earth metal and the alloy obtained through the present method. The present method is technically simple and environmentally-friendly, while featuring low energy consumption, high current efficiency, and low costs.

The invention relates to a multifunctional film-free electrolytic boiled water machine which is characterized by comprising a container, a heater, a controllable electrolytic power supply, an electrolytic tank and an electrolytic electrode assembly, wherein the contained is filled with raw water; the heater is capable of heating or boiling water; the electrolytic tank is provided with a water inlet and a water outlet; the electrolytic electrode assembly is arranged in the electrolytic tank, and the electrolytic electrode assembly adopts a film-free water electrolysis technology with higher efficiency; the raw water inside the container can be heated or boiled through the heater and then flows into the electrolytic electrode assembly from the water inlet of the electrolytic tank; the water is electrolyzed through a gap positioned between electrodes, which have different polarities, of the electrolytic electrode assembly; and the electrolyzed water flows out of the water outlet of the electrolytic tank. According to the multifunctional film-free electrolytic boiled water machine, the design scheme of the electrolytic electrode assembly combines the characteristics of three aspects that the spacing of the gap positioned between the electrodes with different polarities is reasonably minimized, the area of the electrode gap is reasonably maximized, the water has proper flowability in the electrode gap through a water electrolyzing process, and the like to increase the electrolytic probability and quantity of impurities and water molecules which are contained in the water, so that the water electrolysis efficiency is improved.

The invention discloses a novel process for electrochemically recycling low-cobalt WC-Co hard alloy waste material. The method is characterized in that the WC-Co hard alloy waste material is electrochemically treated in a pulse current way in special electrolyte medium, i.e. the WC-Co hard alloy waste material is used as an anode, titanium or stainless steel is used as a cathode, the constitution of the electrolyte is systematically formulated according to the difference of the electrochemical behavior and complexing chemical behavior of WC and Co, the pulse current electrolysis way is developed, the difficulty for passivating the anode can be effectively solved, the entire process is simple, the electrolysis efficiency is high, and the metal recovery rate is high.

An electromechanical actuator comprising an inherently conducting polymer and a conductor for conducing voltage along the polymer from a first end region thereof. The conductor is adapted for axially extending and contracting with axial expansion and contraction of the polymer. In one form, the conductor is in the form of a helix embedded in the polymer and extends along substantially the entire length of the polymer. Also disclosed is a method for manufacture of the electromechanical actuator.

The invention discloses a new method for recycling gallium from a Bayer mother solution by using chelate resin. The method comprises the following steps of: (1) filling a gallium extracting resin into a resin column, and allowing a gallium-containing Bayer mother solution to flow through the resin by using an intermittent dynamic column passing method to reach adsorption saturation; (2) washing the saturated gallium extracting resin with water; (3) desorbing gallium adsorbed by the resin by using an acidic eluent, performing precipitation, impurity removal and other treatment on the eluant to obtain pure concentrated gallium-containing electrolyte, and electrolyzing to obtain the gallium; and (4) washing the eluted resin with water until the pH value of a liquid at the outlet of an exchange column is 6-8. The method has the advantages of simplicity and feasibility, high resin utilization rate, high gallium recovery rate, low energy consumption and cost, high grade of the obtained gallium product, and the like.

The horizontal height-measuring system includes the following several portions: aluminium electrolytic overhead traveling crane, old anode and new anode. It is characterized by also including the portions of wireless comparison base platform which can be moved on the ground surface, background controller and foreground controller. Said invention also provides the concrete action of the above-mentioned every portion and working principle of said system. Said system adopts the optical measurement techniques of laser, etc., so that its measurement accuracy is high.

The invention relates to a chlorine dioxide generator adopting a high-efficiency electrolytic method. The chlorine dioxide generator mainly comprises a chlorine dioxide electrolytic module, a soluble salt system, an electrolytic salt quantitative adding system, an alkaline liquid circulating discharge system and a programmable logic controller (PLC) control system. The chlorine dioxide generator has the characteristics of compact and reasonable structure, high electrolytic efficiency, simple production, mounting and maintenance of equipment, intelligent control, flexibility, convenience, high safety performance and the like.