• 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:
    An aqueous sodium chloride solution for use in production of caustic soda in an electrolytic cell having a cation exchange membrane is purified by adding to said solution a chemical reagent for precipitation separation of impurities remove silica through co-precipitation with a slurry of the precipitates of impurities which are circulated through said solution.
    公开号:SU778707A3
    申请号:SU782608001
    申请日:1978-04-20
    公开日:1980-11-07
    发明作者:Огава Синсаку；Нисимори Такаси；Канке Цутому
    申请人:Асахи Касеи Когио Кабусики Кайся (Фирма)；
    IPC主号:
    专利说明:

    The clarified brine is further filtered.
    The composition of the obtained filtrate is as follows:
    Ca10 ppm
    Mg0.3 ppm
    SO; .- 1.5 g1l
    80 g / | L precipitation is returned to the treatment stage with reagents.
    The results of processing are given in Table.
     Multiple number of impurities to be deposited.
    As is evident from the table, dioxide of the cream and heavy metals precipitate as the amount of circulating sludge increases, which leads to a decrease in their concentration in the sodium chloride solution.
    Example 2. Sodium chloride composition,% :.
    0.06 0.02 0.16 0.03
    97.4
    dissolved in water, and the resulting solution under the same conditions as in example 1 is treated with Ma2CO3, NaOH or Ca (OH) 2, FeCb, resulting in the subsequent filtration of the clarified brine, the content of impurities in the filtrate will be:
    10 ppm 0.3 ppm 10-15.
    The treatment with the above reagents is carried out in conjunction with the periodic addition of calcium chloride. As a result, the precipitate formed at the outlet of the reactor, per 1 liter of saturated NaCl solution, has the following composition, g / l:
    CaSO4
    0.363 CAS0.220
    Mg (OH) 2 0.077
    Then it is returned to the process in an amount that ensures its concentration in the reactor is 6 g / l.
    权利要求:
    Claims (4)
    [1]
    1. A method for purifying a solution of sodium chloride from calcium, magnesium and sulfation impurities, including treating it with reagents and then separating the precipitate formed from the solution, characterized in that, in order to further purify the solution from silica impurity, the precipitate is returned to the reagent treatment step.
    [2]
    2. A method according to claim 1, characterized in that caustic soda, sodium carbonate, calcium hydroxide, calcium chloride, barium carbonate and iron chloride are taken as reagent.
    [3]
    3. A method according to claim 1, characterized in that the precipitate is returned in an amount ensuring its content in the solution of 0.3-3 wt. %
    [4]
    4. A method according to claim 1, characterized in that the pH of the solution during the treatment is 8-I.
    The source of information taken in. attention during examination:
    1. Furman, A.A. and Shraibman, S.S., Preparation and purification of rabolsol. M. 1966, p. 57 (prototype).
    类似技术:
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    RU2048564C1|1995-11-20|Method for production of scandium-containing concentrates
    同族专利:
    公开号 | 公开日
    GB1586952A|1981-03-25|
    JPS5943556B2|1984-10-23|
    BR7802438A|1978-12-19|
    NL7804250A|1978-10-24|
    CA1090092A|1980-11-25|
    SE448473B|1987-02-23|
    DE2816772A1|1978-10-26|
    JPS53130298A|1978-11-14|
    DE2816772B2|1980-07-03|
    FR2387910A1|1978-11-17|
    IT1094090B|1985-07-26|
    US4155820A|1979-05-22|
    FR2387910B1|1981-04-17|
    IT7822478D0|1978-04-19|
    SE7804369L|1978-10-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CH483365A|1967-08-24|1969-12-31|Escher Wyss Ag|Process for the continuous purification of crude alkali salt brines|
    NL7115741A|1970-11-21|1972-05-24|
    DE2450259B2|1974-10-23|1979-03-29|Bayer Ag, 5090 Leverkusen|Process for cleaning electrolysis brine|
    US4016075A|1975-03-17|1977-04-05|Southern Pacific Land Co.|Process for removal of silica from geothermal brine|
    GB1519571A|1976-01-30|1978-08-02|Allied Chem|Brine purification process|
    US4073706A|1976-02-06|1978-02-14|Diamond Shamrock Corporation|Brine treatment for trace metal removal|
    DE2609828A1|1976-03-10|1977-09-15|Bayer Ag|METHOD FOR PURIFYING ELECTROLYSESOLS FOR DIAPHRAGMA CELLS|US4277447A|1979-08-20|1981-07-07|Olin Corporation|Process for reducing calcium ion concentrations in alkaline alkali metal chloride brines|
    US4303624A|1980-09-12|1981-12-01|Olin Corporation|Purification of alkali metal chloride brines|
    JPH0416554B2|1983-03-04|1992-03-24|Asahi Chemical Ind|
    US4568434A|1983-03-07|1986-02-04|The Dow Chemical Company|Unitary central cell element for filter press electrolysis cell structure employing a zero gap configuration and process utilizing said cell|
    US4560452A|1983-03-07|1985-12-24|The Dow Chemical Company|Unitary central cell element for depolarized, filter press electrolysis cells and process using said element|
    US4488946A|1983-03-07|1984-12-18|The Dow Chemical Company|Unitary central cell element for filter press electrolysis cell structure and use thereof in the electrolysis of sodium chloride|
    US4673479A|1983-03-07|1987-06-16|The Dow Chemical Company|Fabricated electrochemical cell|
    WO1984003904A1|1983-03-30|1984-10-11|Du Pont|Improved process for electrolysis of brine with iodide impurities|
    GB8321934D0|1983-08-15|1983-09-14|Ici Plc|Electrolytic cell module|
    US4515665A|1983-10-24|1985-05-07|Olin Corporation|Method of stabilizing metal-silica complexes in alkali metal halide brines|
    US4618403A|1983-10-24|1986-10-21|Olin Corporation|Method of stabilizing metal-silica complexes in alkali metal halide brines|
    US4450057A|1983-11-18|1984-05-22|Olin Corporation|Process for removing aluminum and silica from alkali metal halide brine solutions|
    JPS6161140A|1984-08-31|1986-03-28|Sharp Corp|Copying machine provided with power modification copying condition selecting means|
    GB8423642D0|1984-09-19|1984-10-24|Ici Plc|Electrolysis of alkali metal chloride solution|
    US4648949A|1985-12-31|1987-03-10|E. I. Du Pont De Nemours And Company|Process for electrolysis of silica-containing brine|
    DE3637939C2|1986-11-07|1989-12-14|Metallgesellschaft Ag, 6000 Frankfurt, De|
    SE461988B|1987-10-21|1990-04-23|Eka Nobel Ab|SEATED IN PREPARATION OF ALKALIMETAL CHLORATE WITH WHICH SILICON POLLUTANTS ARE DISPOSED|
    BE1005291A3|1991-09-10|1993-06-22|Solvay|Process for producing aqueous solution sodium chloride industrial and use of aqueous sodium chloride obtained for electrolytic production of an aqueous solution of sodium hydroxide for the manufacture sodium carbonate and for manufacturing sodium chloride crystals.|
    SE512074C2|1993-03-09|2000-01-24|Eka Chemicals Ab|Method of Removing Calcium Ions and Silicon Compounds from Liquid in an Alkali Metal Chlorate Process|
    DE19546135C1|1995-12-11|1997-06-19|Bca Bitterfelder Chlor Alkali|Process for the preparation of silicic acid-containing alkali salt solutions, especially for chlor-alkali electrolysis|
    BE1013016A3|1998-10-30|2001-07-03|Solvay|Process for producing an aqueous solution of sodium chloride.|
    US6746592B1|1999-07-27|2004-06-08|Kvaerner Canada, Inc.|Process for removing aluminum species from alkali metal halide brine solutions|
    JP3840632B2|2000-05-08|2006-11-01|三井造船株式会社|Sodium-based desalting agent and waste treatment equipment|
    US7972493B2|2007-07-27|2011-07-05|Gore Enterprise Holdings, Inc.|Filter wash for chloralkali process|
    DE102007063346A1|2007-12-28|2009-07-02|Uhde Gmbh|Silicon removal from brine|
    FR2930541B1|2008-04-29|2010-05-21|Solvay|PROCESS FOR PURIFYING AQUEOUS SOLUTIONS|
    JP5417871B2|2009-02-06|2014-02-19|東ソー株式会社|Saline purification method|
    JP2010194520A|2009-02-27|2010-09-09|Tosoh Corp|Salt water refining method|
    US20130313199A1|2012-05-23|2013-11-28|High Sierra Energy, LP|System and method for treatment of produced waters|
    US9719179B2|2012-05-23|2017-08-01|High Sierra Energy, LP|System and method for treatment of produced waters|
    CN103482658B|2013-09-27|2015-09-02|江苏久吾高科技股份有限公司|A kind of embrane method process for refining of medicinal sodium chloride|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP52044504A|JPS5943556B2|1977-04-20|1977-04-20|
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