• 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:
    Gypsum as a byproduct in the manufacture of phosphoric acid is converted into potassium sulphate or sodium sulphate by subjecting an aqueous slurry to anion exchange under acidic conditions. Adding solid potassium chloride to the obtained solution of potassium sulphate causes the latter to crystallize in pure state, the potassium chloride solution recovered after filtering off the crystallized potassium sulphate being used for the regeneration of the anion exchanger.
    公开号:SU1286105A3
    申请号:SU833641403
    申请日:1983-09-01
    公开日:1987-01-23
    发明作者:Кристен Баюэр Кнудсен Кнуд
    申请人:Суперфос А/С (Фирма)；
    IPC主号:
    专利说明:

    Ivd
    00


    sn
    ,,
    112
    This invention relates to methods for producing sodium or potassium sulfate by ion exchange.
    The aim of the invention is to increase the product yield and prevent pollution of the environment.
    The method is carried out as follows.
    Calcium sulfate is suspended in water, the pH of the suspension is adjusted to 0-4 with sulfuric or hydrochloric acid, the suspension is contacted with Duolite - sodium sulfate - 374 anion exchange resin in chlorine form, the anion exchanger is regenerated with a solution of sodium chloride or LIA, and the target product is regenerated. sodium chloride or potassium smoke. A decrease, as well as an increase in acidity, reduces the yield of the target product,
    Example 1.5 kg of crystalline phosphogypsum is milled in a wet state and suspended in 100 kg of seawater. The suspension is acidified to pH and contacted with 35 liters of resin duolit-sodium sulfate-374 in chlorine form. The effluent contains 2.5% CaCl. The spent ion exchanger is regenerated with 40 kg of 2J5% Horo solution KS, 3 are added to the regenerating solution. , 5 kg of solid potassium chloride with stirring and crystallize 4 kg of potassium sulfate. The mother liquor is recycled to react with the spent anion exchanger.
    Example 2 1.5 kg of calcium sulfate are suspended in 30 liters of fresh water and acidified to pH 3 with sulfuric acid. The suspension is contacted with 12 liters of resin duolite sulfate sodium-374 in chlorine form. The waste stream contains 3% CaCl. , Spent ion exchange unit is regenerated with 12 kg of a 24% NaCl solution. 0.85 kg of solid sodium chloride is added to the regenerating solution and 1 kg of sodium sulfate is recrystallized. Mother solution
    05; 2
    recycle to react with spent anion exchange resin,
    The table shows the effect of acidity on the efficiency of the process.

    pH
    Useful ion exchange ability,%
    100
    100
    too
    100
    ,
    20
    75
    51
    five
    0
    five
    0
    five
    As follows from the examples, the method allows the ion-exchange synthesis of sodium or potassium sulfate in high yield,
    1 l
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    1, A method of producing sodium or potassium sulphate from calcium sulphate, comprising contacting its aqueous suspension with an ion exchanger, followed by regeneration of the ion exchanger and isolation of the desired product from the regenerate as a solid salt, characterized in that, in order to increase the product yield and prevent contamination the environment, contacting the calcium sulfate slurry is carried out with anion exchange resin in chlorine form at pH 0-4, and the regeneration of the anion exchange resin is carried out with a solution of sodium or potassium chloride with separation of the target product by salting out,
    2, the method according to claim 1, 1 and 2, and that the mother liquor is recycled after separation of the product. on stadzhzh) regeneration.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1286105A3|1987-01-23|Method of producing sodium or potassium sulfate from calcium sulfate
    US4120737A|1978-10-17|Manufacture of calcium sulphate alpha hemihydrate
    RU97112480A|1999-05-20|METHOD FOR PRODUCING POTASSIUM SULPHATE, SODIUM SULPHATE AND SODIUM CHLORIDE
    RU1774951C|1992-11-07|Method of isolating keto-2-l-culonic acid from enzymic wort
    JP4111404B2|2008-07-02|Method for separating NaCl from LiCl solution
    JPH0621033B2|1994-03-23|Manufacturing method of high-purity sodium carbonate
    JP2000504324A|2000-04-11|Glutamic acid production method
    JP3823330B2|2006-09-20|Method for isolating N-phosphonomethylglycine
    SU1323532A1|1987-07-15|Method of producing phosphoric acid
    JPH0681742B2|1994-10-19|Method for producing aqueous solution of sodium methionine salt
    US4946565A|1990-08-07|Process for the production of alkali metal chlorate
    SU1090661A1|1984-05-07|Method of producing cryolite
    JPH02117640A|1990-05-02|Production of ether carboxylate
    SU945076A1|1982-07-23|Process for purifying phosphogypsum
    SU1758002A1|1992-08-30|Method of producing concentrated solutions of magnesium sulfate from sea type brine
    US3336374A|1967-08-15|Recovery of l-glutamic acid
    SU452543A1|1974-12-05|The method of producing nickel sulphate
    KR950013570B1|1995-11-09|The preparation method of cefodizime bisodium salts
    RU1773439C|1992-11-07|Method of regenerating 2-propanol in manufacture of levomycetin
    GB1203950A|1970-09-03|Process for the separation of useful compounds from waste formed from the production of alumina by the bayer process
    SU566765A1|1977-07-30|Method of separation of sodium sulphate from sodium sulphate-chloride solutions and waste water
    SU1016284A1|1983-05-07|Process for purifying 6-bromo-methylanthrapyridone
    RU2036838C1|1995-06-09|Method for purification of sodium chloride
    GB2127003A|1984-04-04|Gypsum conversion to potassium sulphate using anion exchange
    SU1518298A1|1989-10-30|Method of producing calcium hydrogene phosphate
    同族专利:
    公开号 | 公开日
    KR840006173A|1984-11-22|
    CA1200364A|1986-02-11|
    FI833030A|1984-03-03|
    DK385583D0|1983-08-23|
    DE3331416A1|1984-03-08|
    DE3331416C2|1991-08-14|
    IL69553A|1987-01-30|
    NZ205348A|1985-07-12|
    US4504458A|1985-03-12|
    DK385583A|1984-03-03|
    MX157374A|1988-11-18|
    MA19888A1|1984-04-01|
    IE55463B1|1990-09-26|
    FI833030A0|1983-08-24|
    JPH0364449B2|1991-10-07|
    AU558080B2|1987-01-15|
    FR2532643B1|1988-04-08|
    IN159358B|1987-05-09|
    NO159996B|1988-11-21|
    PT77277A|1983-10-01|
    FI71291B|1986-09-09|
    NO159996C|1989-03-01|
    FI71291C|1986-12-19|
    IT1162942B|1987-04-01|
    IE831993L|1984-03-02|
    NL192384C|1997-07-04|
    GR78981B|1984-10-02|
    SE457531B|1989-01-09|
    AU1863983A|1984-03-08|
    AT378359B|1985-07-25|
    IT8367920D0|1983-09-02|
    KR910003611B1|1991-06-07|
    DK157666C|1990-06-25|
    SE8304704D0|1983-08-31|
    BE897666A|1984-01-02|
    NO833143L|1984-03-05|
    JPS5983929A|1984-05-15|
    ZA836350B|1984-10-31|
    FR2532643A1|1984-03-09|
    PT77277B|1986-03-18|
    ATA301883A|1984-12-15|
    SE8304704L|1984-03-03|
    NL192384B|1997-03-03|
    DK157666B|1990-02-05|
    BR8304756A|1984-04-10|
    NL8303037A|1984-04-02|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CA528345A|1956-07-24|O. Hoffer Jean|Process for the manufacture of potassium sulphate|
    CA741730A|1966-08-30|Asahi Kasei Kogyo Kabushiki Kaisha|Utilization of sea water|
    GB437652A|1934-05-02|1935-11-04|Albert Eric Cashmore|Improvements in or relating to the production of potassium sulphate|
    US2366650A|1942-01-14|1945-01-02|Dorr Co|Ionic exchange operations|
    US2736635A|1951-07-07|1956-02-28|Ionics|Method of producing sulfite cooking liquors and recovering valuable constituents therefrom|
    US2882128A|1954-09-16|1959-04-14|Chimiques Pour L Andustrie Et|Preparation of potassium sulphate from calcium sulphate and potassium chloride|
    US2989370A|1957-08-21|1961-06-20|American Potash & Chem Corp|Production of potassium carbonate by anion exchange|
    US3096153A|1960-10-17|1963-07-02|Standard Magnesium Corp Inc|Ion exchange process for producing potassium sulfate and sulfuric acid|
    US3445185A|1966-07-26|1969-05-20|Kali Forschungs Inst|Preparation of alkali metal sulfates|
    US3402018A|1967-02-14|1968-09-17|Grace W R & Co|Removal of potassium and sodium sulfate from brines and bitterns|
    GB1166930A|1967-06-23|1969-10-15|Dansk Svovlsyreog Superphospha|Fertilizer production|
    GB1307218A|1969-05-09|1973-02-14|Dansk Svovlsyreog Superphospha|Method and plant for effecting mass transfer processes|
    US4193772A|1978-06-05|1980-03-18|Exxon Research & Engineering Co.|Process for carbonaceous material conversion and recovery of alkali metal catalyst constituents held by ion exchange sites in conversion residue|
    GB2068918B|1980-01-09|1984-06-20|Lozano J A F|Potassium sulphate and potassium sodium sulphate production|US4707347A|1985-04-17|1987-11-17|Kali Und Salz|Process for the production of potassium sulfate from potassium chloride by means of ion exchangers|
    DE3707406C2|1987-03-07|1990-10-04|Kali Und Salz Ag, 3500 Kassel, De|
    FR2652076B1|1989-09-20|1992-03-20|Rhone Poulenc Chimie|METHOD FOR RECOVERING RARE EARTH VALUES IN THE GYPSES.|
    US5595914A|1995-10-23|1997-01-21|Berigari; Mohammed S.|Gypsum determination in soils by conversion to water-soluble sodium sulfate|
    CA2414894C|2001-12-19|2005-08-23|Dirdal Rand Technologies|Method of producing potassium sulfate|
    WO2013117950A1|2012-02-09|2013-08-15|Mohammed Olfi|A combined reverse osmosis/ion exchange/electrodialysisprocess that uses gypsum as a raw material to produce sulfuric acid and sodium hydroxide|
    US9868647B2|2014-04-02|2018-01-16|Technion Research & Development Foundation Ltd.|System and methods for removing impurities from phosphogypsum and manufacturing gypsum binders and products|
    JP6421021B2|2014-11-25|2018-11-07|オルガノ株式会社|Method and apparatus for purification of high concentration sulfate solution|
    WO2020012460A1|2018-07-08|2020-01-16|IMI Tami Institute for Research and Development ltd|Process for production of potassium sulfate from potash minerals via ion exchange|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    GB8225006|1982-09-02|LV920322A| LV5105A3|1982-09-02|1992-12-17|Sodium or potassium sulphate retrieval from calcium sulphate|
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