• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Electrochemically active lead dioxide is produced by forming an aqueous suspension of an oxidizable lead substrate, adjusting its pH to a value in the alkaline range between about 10 and 14, and then oxidising with gaseous ozone. The pH value is preferably held constant during the oxidation treatment, by adding alkali or by buffering, and the oxidation treatment is preferably carried out at an elevated temperature of about 70 to 80 DEG C. Finely divided or dissolved inoculating metals may be added to the suspension, when a corresponding inoculation is desired for the electrochemical use of the resulting lead dioxide. Finely divided inert substances, such as carbon, glass or plastics in powder or fibre form, may be added to the suspension, in order to make a lead dioxide which can be compressed to a mass of high strength for use in an accumulator or the like.
    公开号:SU931098A3
    申请号:SU792776659
    申请日:1979-06-20
    公开日:1982-05-23
    发明作者:Фабер Петер；Бенде Гюнтер；Бренэ Жан
    申请人:Рейниш-Вестфелишес Электрицитетсверк Аг (Фирма)；
    IPC主号:
    专利说明:

    (5) METHOD FOR OBTAINING LEAD DIOXIDE
    权利要求:
    Claims (2)
    [1]
    The invention relates to a method for producing electrochemically active lead dioxide used, for example, in batteries. A known method of producing lead dioxide By oxidizing lead acetate at 100-110 ° C, followed by separating, washing and drying the sediment flj, the closest to the invention to the technical essence and the achieved result is a method of producing lead dioxide, which involves processing a suspension of lead-containing raw materials, such as sulfate or 1 lead arbonate, an oxidizing agent, in particular, chlorates or perchlorates in alkaline heat when heated, separating, washing and drying the precipitate of the product 2. The disadvantage of these methods It is that the resulting lead dioxide has not enough high electrochemical activity component. The purpose of the invention is to increase the electrochemical activity of the product. The goal is achieved according to the method of producing lead dioxide, including generally processing a suspension of lead-containing raw material - powdered metallic lead, divalent lead sulfate or lead oxide with an oxidizing agent - ozone gas equal to 10-14, temperature 70-80 ° C, followed by separation, washing and drying the product precipitate . Lead-containing raw materials are subjected to oxidation, for example, powdered metallic lead or bivalent lead compounds — sulphate or lead oxide. The oxidation process is carried out with ozone gas supplied at a rate of about 10 l / h, at a pH of 10-T, achieved by the introduction of, for example, potassium hydroxide, at a temperature of 70 °. . The precipitate formed is separated by filtration, washed and dried. Oxidation of the initial lead-containing raw material with gaseous ozone at pH 10-1 and a temperature of 70-80 ° C makes it possible to obtain a product with an electrochemical activity of l 62-S67 C / g. Example 1. 50 g of lead sulphate are suspended in 500 ml of water, after which the pH is adjusted to 11 by the addition of drops of dilute potassium hydroxide. The resulting mixture is heated to 80 ° C and technical ozone is passed through it at a rate of 10 l / h. In this case, the white suspension first becomes brown and then black. During the oxidation process, the pH is kept constant. After a two-hour ozone supply, the solid reaction product is filtered, washed, dried at 70 ° C in a vacuum oven. Example 2. The conditions for carrying out the process are the same as in Example 1, but powdered metallic lead is fed to the oxidation and the process is carried out at. Example 3 - The conditions for carrying out the process are the same as in Example 1, but lead oxide is supplied to the oxidation and the process is carried out at a temperature of 70 ° C. The electrochemical activity of lead dioxide obtained under the conditions of examples 1-3 is 462-567 Cl / Thus, the invention allowed to increase the electrochemical activity of the resulting product (Cl / g according to a known method and B2-5b7kl / g according to the invention). Claim 1. Method for producing lead dioxide, which includes treating a suspension of lead-containing raw material with an oxidizing agent in an alkaline medium when heated, separating, washing and drying the product sludge, characterized in that, in order to increase the electrochemical activity of the product, gaseous ozone is used as the oxidizing agent. 2. The method according to claim 1, wherein the use of powdered metallic lead or bivalent lead sulfate compounds or lead oxide as lead-containing syr. 3. The method according to PP.1 and 2, about tl and that the treatment is carried out at a pH of 10-14 and a temperature of 70-80 ° C. Sources of information taken into account during the examination 1.Karin Yu.V., Angelov I.I. Pure chemical reagents. M., Goskhimizdat, 1955, p.72,
    [2]
    2. The patent of Germany tf iSOQiiBS, cl. 12 p 21/08, publ.197L (prototype).
    类似技术:
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    RU2089495C1|1997-09-10|Method of producing the oxidized graphite
    US3847903A|1974-11-12|Method for extracting and isolating rifamycin o from fermentation broths of rifamycins
    同族专利:
    公开号 | 公开日
    DD144399A5|1980-10-15|
    DE2827107B2|1980-06-26|
    JPS557594A|1980-01-19|
    GB2023558B|1982-09-02|
    DE2827107A1|1980-01-10|
    DE2827107C3|1981-02-26|
    GB2023558A|1980-01-03|
    FR2429183A1|1980-01-18|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE2841048C3|1978-09-21|1981-07-02|Rheinisch-Westfälisches Elektrizitätswerk AG, 4300 Essen|Process for the production of electrochemically active leadoxide|
    EP0089842B1|1982-03-22|1990-10-03|United Kingdom Atomic Energy Authority|Lead acid electric storage cell and a positive electrode therefor|
    US4507855A|1982-08-06|1985-04-02|United Kingdom Atomic Energy Authority|Lead acid electric storage cell and a positive electrode therefor|
    GB2117278A|1982-03-22|1983-10-12|Atomic Energy Authority Uk|A method of manufacturing a positive electrode for a lead acid electric storage cell|
    DE3211386C2|1982-03-27|1991-07-11|Battelle-Institut Ev, 6000 Frankfurt, De|
    FR2543940A1|1983-04-05|1984-10-12|St Joe Minerals Corp|LARGE SPECIFIC LEAD OXIDE COMPOSITE AND PROCESS FOR PREPARING THE SAME|
    JPH0642370B2|1985-08-28|1994-06-01|新神戸電機株式会社|Cathode plate for lead acid battery|
    US6664003B2|2001-02-06|2003-12-16|Rsr Technologies, Inc.|Method for enhancing lead oxidation during production of lead acid batteries|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE2827107A|DE2827107C3|1978-06-21|1978-06-21|HOtM 4-56|
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