• 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:
    The invention relates to a cell for the electrolysis of a solution produced by the sulphuric digestion of ilmenite. …<??>The solution to be treated passes through the cathode compartment of one or two cells which are equipped with an ion exchange membrane of cationic type.
    公开号:SU1720495A3
    申请号:SU884355714
    申请日:1988-05-13
    公开日:1992-03-15
    发明作者:Башо Жан；Ле Рукс Оливье
    申请人:Рон-Пуленк Шими (Фирма)；
    IPC主号:
    专利说明:

    This invention relates to electrochemistry, in particular to electrochemical methods for processing solutions containing titanium and iron.
    The aim of the invention is to increase productivity due to the possibility of increasing current density and current output.
    Example 1. A cell for electrolysis is used, having the following characteristics and conditions: cation partition wall - NAFION 423; the anode is a titanium strip coated with platinum-iridium; cathode - copper strip; current density of 30 A / dm.
    In addition, the following media is circulated: anolyte No. 804 0.5 n; capolite at the inlet, g / l: 120; Fe2 + 45; Fe3 3; H2S04270.
    For a catholyte circulation rate of 10 cm / s and an anolyte of 0.5 cm / s with a cell temperature of 65 ° C, a catholyte of the following composition is obtained at the outlet of the cathode compartment, g / l: Ti4 + 104; Fe2 48; TI3 + 16.
    The current output at the cathode is 99%
    PRI mme R 2. Conditions work as follows.
    A cell for electrolysis is used, having the characteristics and conditions: cation partition - NAFION 423; the anode is a titanium strip coated with platinum-iridium; cathode - palladium titanium with holes; current density of 20 A / dm2.
    In addition, the following media is circulated: anolyte H2SO4 0.5 n: inlet catholyte, g / l: Ti44 120; Fe2 + 47: Fe3 + 4; H2S04270.
    For anolyte circulation rate of 0.5 cm / s and catholyte 10 cm / s at a cell temperature of 65 ° C, a catholyte of composition, g / l, is obtained at the outlet of the cathode compartment:. Fe SIjTi34;
    The current output at the cathode is 99%.
    N1 Yu
    Yu SP

    sa
    PRI me R 3. Use different types of cathodes for experiments 1,2 and 3.
    The conditions of work of the cell are as follows; inlet catholite, g / l: TI 120; Fe2 46; D3; H2S04 270.
    The catholyte circulation rate is 30 cm / s; cell temperature 65 ° C; cation partition - NAFION 423; current density 30 A / dm2.
    Anolyte, H2S04 0.5 n. for experiments 1 and 2, a solution of ferrous iron salt: Fe2 40 g / l for experiment 3.
    The anode is platinum titanium coated with platinum-iridium for experiments 1 and 2, and also graphite for experiment 3.
    The results are given in the table. Example 4, Shows the possibility of obtaining solutions containing a high concentration of TI with a cell for electrolysis.
    The working conditions of the cell are as follows: anolyte — Nazoz 0.5 n; catholyte at the entrance, g / l: Ti4 + 120; Fe2 + 45J; H2S04 270.
    The catholyte circulation rate is 60 cm / s; anolyte circulation rate 0.5 cm / s; cell temperature 65 ° C; cation partition - NAFION 423; the anode is a titanium strip coated with platinum-iridium; cathode - perforated copper; current density of 17 A / dm.
    Receive at the exit the catholyte of the following composition, g / l: TI4 + 46,4; Fe2 + 49.1; Ti3 73.6. The cathode current output is 97.5%.
    Example 5 A cell for electrolysis is used, having the following characteristics and conditions; cation partition - NAFION 423; the anode is a titanium strip coated with platinum-iridium; the cathode is lead; current density 20 A / dm.
    In addition, the following media is circulated: anolyte NgSOz 0.5 n; catholyte at the entrance, g / l: T14 + 120; Fe2 + 45; TG 1; H2S04270.
    For a catholyte circulation rate of 10 cm / s and an anolyte of 0.5 cm / s with a cell temperature of 65 ° C, a catholyte of the following composition is obtained at the outlet of the cathode compartment, g / l: 104; Fe2 + 48; TI3 8.
    The current output at the cathode is 80%.
    Example A cell for electrolysis is used, having the following characteristics and conditions: cationic membrane — NAFION 423; the anode is a titanium strip coated with platinum-iridium; the cathode is titanium strip lead t; current density 30 A / dm2.
    In addition, the following media is circulated: the anolyte NAZoD 0.5 n;
    catholyte at the entrance, g / l: Ti4 + 120; 1; H2S04270.
    For a catholyte circulation rate of 10 cm / s and anolyte 0.5 cm / s with temperature
    65 ° C cells are obtained at the exit of the cathode compartment catholyte of the following composition, g / l: 120; Fe2 + 48: TI 9.
    The current output at the cathode is 90%.
    The method consists in circulating in the cathode compartment of the cell of the solution being processed.
    This solution contains titanium and iron ions. Titanium is generally in the form of titanium (IV), the ratio Fe (ll) / Fe (lll) may vary.
    The solution may also contain H + ions and sulfate type anions.
    The method of producing titanium dioxide
    includes the following stages.
    The first step is to affect the titanium containing the ore with a solution of sulfuric acid. The solution obtained in this way is reduced from exposure to
    the second stage, then clarified in the third stage, stages 2 and 3 may be reversed. The fourth stage consists in crystallization, then in the separation of a part of ferrous sulphate in solution. The solution obtained in this way is concentrated in the fifth stage, then in the last and sixth stages the titanyl sulphate is hydrolyzed and the titanium hydroxide is separated, which is then calcined.
    The cell for electrolysis and the method of the invention are used especially to restore the solution formed from the first stage mentioned above, i.e. from the effect of sulfuric acid on titanium-containing ore, especially of the ilmenite type.
    In this case, the recovery stage of the method (second stage) is entirely carried out by electrolysis.
    However, it is also possible to carry out the reduction at any point in the method of obtaining TiO2 between exposure and hydrolysis and, in particular, immediately before hydrolysis.
    In the anode compartment, it is possible to circulate or acidified water, for example, a solution of 0.5N. H2SCM, or a salt solution containing ferrous iron.
    The solution circulating in the cathode compartment can be recycled at the exit of this compartment.
    It is also possible to circulate the solution in the cathode compartments of two cells mounted in parallel. Such installation allows the industrial unit to work continuously even in the event of damage to one of the cells.
    The use of a cationic membrane makes it possible to simultaneously obtain an effective electrical improvement in the electrical current and an increase in the current density.
    In the prototype, the current efficiency is 85% and the current density is 7.5 A / dm2, while in this method the current output is on average 99% and the current density is between 20-30 A / dm.
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    Method for reducing ferric ion by electrolysis by dissolving
    obtained by expanding ilmenite with sulfuric acid and containing titanyl and divalent and ferric sulphates, feeding said solution into the cathode chamber of a membrane electrolyzer and feeding a solution of divalent iron salts into the anode chamber, characterized in that current density and current output, the specified solution is fed into the cathode chamber of the electrolyzer with a cation-exchange membrane.
    15
    类似技术:
    公开号 | 公开日 | 专利标题
    US4206021A|1980-06-03|Process for the production of pigmentary titanium dioxide by the sulphuric acid method
    SE9200804D0|1992-03-16|PROCESS AND APPARATUS FOR THE PRODUCTION OF SULPHURIC ACID AND ALKALI METAL HYDROXIDE
    GB1576280A|1980-10-08|Electrolytic process for the recovery of iron sulphuric acid and/or hydrochloric acid from a waste iron-containing solution
    US6210558B1|2001-04-03|Steel pickling process in which the oxidation of the ferrous ion formed is carried out electrolytically
    SU1720495A3|1992-03-15|Method of reducing iron | ions
    US4906340A|1990-03-06|Process for electroplating metals
    CA1132092A|1982-09-21|Treatment of sulfuric acid leach solution containingferric ions in diaphragm cell
    US4190508A|1980-02-26|Process for removing chalcophile elements from aqueous solutions by electrolysis
    US3969207A|1976-07-13|Method for the cyclic electrochemical processing of sulfuric acid-containing pickle waste liquors
    US4431496A|1984-02-14|Depolarized electrowinning of zinc
    JP2001233606A|2001-08-28|Method for producing sodium persulfate
    US3043757A|1962-07-10|Electrolytic production of sodium chlorate
    SU310538A1|1974-08-05|
    US3616323A|1971-10-26|Electrochemical conversion of phenol to hydroquinone
    RU2481425C2|2013-05-10|Method of cleaning chromium plating electrolytes
    US2417259A|1947-03-11|Electrolytic process for preparing manganese and manganese dioxide simultaneously
    US3824160A|1974-07-16|Manufacture of copper dichromate and related materials
    CN113818037A|2021-12-21|Electrolysis device for electrolyzing trivalent titanium from titanium white by sulfuric acid process
    CN113697854A|2021-11-26|Process for electrolyzing trivalent titanium from titanium white by sulfuric acid method
    RU2763856C1|2022-01-11|Method for processing the spent solution of copper brightening
    CA1280996C|1991-03-05|Electrolytic process for manufacturing pure potassiumperoxydiphosphate
    SU1395588A1|1988-05-15|Method of recovering nickel
    WO1995023880A1|1995-09-08|Treatement of electrolyte solutions
    US3020124A|1962-02-06|Manufacture of perchlorates
    GB2032959A|1980-05-14|Method and apparatus for continuous electrolytic descaling of steel wire by non-contact current flow
    同族专利:
    公开号 | 公开日
    ES2039659T3|1993-10-01|
    JPH0220712B2|1990-05-10|
    FI882264A|1988-11-16|
    EP0291416B1|1991-11-21|
    DE3866279D1|1992-01-02|
    FR2615204B1|1991-06-14|
    FI882264A0|1988-05-13|
    JPS6456890A|1989-03-03|
    US4919772A|1990-04-24|
    FR2615204A1|1988-11-18|
    FI86561B|1992-05-29|
    CA1328421C|1994-04-12|
    FI86561C|1992-09-10|
    EP0291416A1|1988-11-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CA1017744A|1972-06-21|1977-09-20|E.R. Squibb And Sons|Perhydrofluorenetetrol and perhydrophenanthrenetetrol derivatives|
    CH610935A5|1976-09-03|1979-05-15|Battelle Memorial Institute|Electrochemical reactor intended to be incorporated into a plant for the production of titanium dioxide from ilmenite by the sulphate process|
    JPS5346484A|1976-10-12|1978-04-26|Tokuyama Soda Co Ltd|Electrolytic cell|
    FR2418773B1|1978-03-02|1980-09-05|Thann & Mulhouse|
    US4175014A|1978-03-06|1979-11-20|Amax Inc.|Cathodic dissolution of cobaltic hydroxide|
    US4230542A|1978-10-13|1980-10-28|Oronzio De Nora Impianti Elettrochimici S.P.A.|Electrolytic process for treating ilmenite leach solution|
    SU996523A1|1981-05-21|1983-02-15|Усть-Каменогорский Строительно-Дорожный Институт|Non-soluble anode for producing metals from aqueous electrolytes|
    JPH0124227B2|1982-06-28|1989-05-10|Asahi Glass Co Ltd|
    JPH0211673B2|1983-07-05|1990-03-15|Kawasaki Kasei Chemicals|
    SU1217927A1|1984-06-22|1986-03-15|Химико-металлургический институт АН КазССР|Method of electrolytic reduction of iron trivalent cation|DE4129308C2|1991-09-03|1994-07-07|Metallgesellschaft Ag|Process for the preparation of a titaniumsulfate solution and its use|
    US5227032A|1991-09-24|1993-07-13|The United State Of America As Represented By The Administrator Of The National Aeronautics And Space Administration|Method for producing oxygen from lunar materials|
    US9856569B2|2012-07-03|2018-01-02|Field Upgrading Limited|Apparatus and method of producing metal in a nasicon electrolytic cell|
    US9577257B2|2013-09-18|2017-02-21|Guiqing Huang|Methods of making low cost electrode active materials for secondary batteries from ilmenite|
    CN106048641A|2016-07-06|2016-10-26|扬州大学|Process method of electrochemically preparing Fe3+ and H2 in pair|
    CN105925999B|2016-07-06|2018-06-15|扬州大学|A kind of Fe2+Anodic oxidation and cathodic reduction co-production H2Process|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR8706818A|FR2615204B1|1987-05-15|1987-05-15|ELECTROLYSIS CELL AND METHOD FOR REDUCING A SOLUTION COMPRISING TITANIUM AND IRON|
    [返回顶部]