• 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 process for recovering from potassium mineral flotation tailings sodium chloride of sufficiently high purity to make it suitable for industrial use, characterized by comprising the following stages: (a) washing said flotation tailings with water and with the mother liquor from one or more successive stages of the process, said mother liquor containing sodium chloride as undissolved bottoms, to give a mixture of a solid phase comprising nearly all the sodium chloride contained in said fed tailings, and a liquid phase (b) separating said mixture into a first turbid portion enriched in said solid phase, and a second turbid portion enriched in said liquid phase (c) separating the solid phase from the liquid phase of said first turbid portion, this latter separated phase constituting at least part of said mother liquor for use in stage (a), and possibly (d) drying the solid phase separated in stage (c) to produce high purity sodium chloride.
    公开号:SU1572412A3
    申请号:SU833599271
    申请日:1983-05-10
    公开日:1990-06-15
    发明作者:Вителларо Антонио；Санфилиппо Джованни
    申请人:Италкали Сочиета Италиана Сали Алкалини С.П.А. (Фирма)；
    IPC主号:
    专利说明:

    This invention relates to methods for separating sodium chloride from waste containing it and minerals.
    The aim of the invention is to obtain sodium chloride with a NaCl content of at least 99.4, suitable for the electrolytic production of chlorine and alkali.
    Example, 100 t / h of flotation tailings containing wt.%: NaCl 79.5; Cainite 8.3; Shenit 1, 7; sylvite 0.5; anhydride 0.3; kyserite 1,2; magnesium chloride 1,3; clay 0.3; water 6.9, is fed to the washing with water in the amount of 40 t / h and 198.8 t and the mother liquor containing wt.%: MgCl2 1.2; MgS04 8.6;
    KC1 5.1; NaCl 17.6; 67.5 to obtain 67 t / h of solid product of composition, wt.%: NaCl 99.6; anhydride 0.1; kyserite 0.1; sylvite 0.1; clay 0.1 and 271.8 t / h of liquid composition, wt.%. MgCl4, 1.2; MgS04 8.6; KC1 5.1; NaCl 17, 0 67.5, The resulting suspension is subjected to desliming in cyclones to partially separate the solid part from the liquid: 130 t / h of the solid phase containing 60 t / h of solid product and 70 t / h of liquid, 208.8 t / h of liquid phases containing 7.1 tons per hour of solid product and 201.7 tons per hour of liquid, which is sent for decantation.
    ate
    1C
    B
     with
    The solid phase is subjected to centrifugation to separate the solid part from the liquid part and the solid part is washed with 3.8 t / h and water to obtain 63.8 t / h of solid product of the following composition, wt.%: NaCl 93.6; CaS04- 0.1; kyserite 0.1; eilvit 0,1; clay 0.1; 6, which is directed to a drying stage to obtain a finished product containing, JQ wt.%: NaCl 99.6, kizerite 0.1; Silica clay 0.1,
    The liquid phase from the centrifugation stage is left to obtain 17.8 tons / h of slime and 191 tons / h of liquid composition, $ 5
    wt.%: MgCl 1,2; MgS04 8.6; KC1 5.1; itfaCl 17.6; HgO 67.5, of which 128.8 t / h return to the stage of washing - Ki feedstock,
    Thus, this method makes it possible to obtain sodium chloride in contrast to the prototype dT with a high content of itfaCl — 99.6%, suitable for electrolytic chlorine and alkali production.
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    A method of separating sodium chloride from the waste containing it, including washing the latter with a solution of sodium chloride, desliming the suspension, centrifuging it, washing the separated solid phase with water, drying it and returning the mother liquors to the process, NaCl content not lower than 99.4%, suitable for the electrolytic production of chlorine and alkali, the washing of the raw material is carried out with mother liquor saturated with sodium chloride, and additionally at this stage in one is water, the slurry is desliming in cyclones, and the liquid phase thus obtained is subjected to settling, followed by feeding the clarified liquid phase to the washing step,
    类似技术:
    公开号 | 公开日 | 专利标题
    US2968528A|1961-01-17|Process for producing clarified phosphoric acid
    SU1572412A3|1990-06-15|Method of isolating sodium chloride from sodium chloride waste
    IL38058A|1977-11-30|Process for extraction of phosphorus compounds from phosphate ores
    CN109319819A|2019-02-12|A kind of technique preparing 6N grades of strontium nitrates
    US4258024A|1981-03-24|Non-pollutant process for the manufacture of neutral calcium hypochlorite with a high content of active chlorine
    US2766884A|1956-10-16|Process for separating sodium chloride from kainite by means of flotation
    US2895794A|1959-07-21|Process for recovering potassium values from kainite
    US2902344A|1959-09-01|Process for the preparation of hydrous potassium magnesium sulfate and potassium sulfate from kainite containing sodium chloride
    US3767775A|1973-10-23|Process for producing calcium hypochlorite
    CS212744B2|1982-03-26|Method of preparing calcium hypochlorite
    US4118462A|1978-10-03|Process for the preparation of purified phosphoric solutions from phosphoric acid
    US2902343A|1959-09-01|Process for the preparation of hydrous potassium magnesium sulfate from kainite containing sodium chloride
    US3760941A|1973-09-25|Process for preparing highly free flowing rock or table salt
    US3082063A|1963-03-19|Process for the preparation of potassium sulphate and hydrous potassium-magnesium sulphates from natural kainite
    US4377560A|1983-03-22|Process for producing low aluminum content phosphoric acid from high aluminum matrix
    US4529578A|1985-07-16|Production of calcium hypochlorite
    US4379776A|1983-04-12|Process for reducing aluminum and fluorine in phosphoric acids
    SU1623954A1|1991-01-30|Process for producing potassium chloride
    SU1242465A1|1986-07-07|Method of isolating sodium chloride from solutions
    RU2079378C1|1997-05-20|Method of processing carnallite ores
    US3391990A|1968-07-09|High purity sodium tripolyphosphate
    US3358740A|1967-12-19|Salt water concentration with alumina-silica additive and separation of sodium sulfate-calcium sulfate double salt
    SU1666445A1|1991-07-30|Method for purifying sodium chloride
    RU2070542C1|1996-12-20|Method of producing potassium chloride
    SU763267A1|1980-09-15|Method of extracting potassium chloride
    同族专利:
    公开号 | 公开日
    ES8406381A1|1984-08-16|
    IT1157938B|1987-02-18|
    MX159556A|1989-07-04|
    ES522157A0|1984-08-16|
    PL241897A1|1984-06-18|
    RO89757A|1986-07-30|
    UA6032A1|1994-12-29|
    BR8302440A|1984-01-17|
    IT8221187D0|1982-05-11|
    US4541832A|1985-09-17|
    AU1438683A|1983-11-17|
    AU557214B2|1986-12-11|
    FR2526781A1|1983-11-18|
    FR2526781B1|1990-04-13|
    DE3316931A1|1983-11-24|
    DE3316931C2|1992-04-30|
    CA1195092A|1985-10-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR593279A|1924-08-02|1925-08-20|Method and device for making salt impure suitable for culinary and industrial uses|
    FR1316836A|1962-03-03|1963-02-01|Zentrale Forschungsstelle Fuer|Process for obtaining sodium chloride and kieserite from the residual sludge separated in the settling apparatus and on the sludge filter|
    US3904520A|1974-11-13|1975-09-09|Int Minerals & Chem Corp|Process for the clarification of brine|
    DD119388A1|1975-04-04|1976-04-20|
    DD200882A1|1981-11-09|1983-06-22|Guenter Doering|PROCESS FOR THE PRODUCTION OF SODIUM CHLORIDE PRODUCTS|AU2603588A|1987-10-07|1989-05-02|Gerald J. Grott|Method of reforming soluble salts to effect purification and increase crystal size thereof|
    DE4422034C1|1994-06-23|1995-08-31|Kali & Salz Ag|High grade sodium chloride purificn. by leaching and flotation|
    US8192633B2|1998-07-06|2012-06-05|Grott Gerald J|Methods of energy storage and transfer|
    US7717173B2|1998-07-06|2010-05-18|Ecycling, LLC|Methods of improving oil or gas production with recycled, increased sodium water|
    US20100051556A1|2008-08-29|2010-03-04|Grott Gerald J|Methods of purifiying water using waste brines to regenerate ion-exchange resins|
    US20100147767A1|2008-12-15|2010-06-17|Grott Gerald J|Method for purifying waste saline waters without reagent waste|
    CN109319809B|2018-12-04|2021-03-09|青海盐湖工业股份有限公司|Reverse flotation tail salt recycling method and system|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    IT21187/82A|IT1157938B|1982-05-11|1982-05-11|PROCEDURE FOR THE PRODUCTION OF SODIUM CHLORIDE WITH A HIGH DEGREE OF PURITY STARTING FROM STERILES OF FLOTATION OF POTASSIUM MINERALS|
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