• 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:
    A chlorine dioxide generating process is described wherein chlorine formed with the chlorine dioxide is used to form acid reactant for the chlorine dioxide generating process by reaction with sulphur dioxide and water. The substantial evaporation of the water which would otherwise result from the exothermic nature of the reaction is prevented by controlling the temperature of the water during the reaction. In one embodiment, the temperature control is achieved by effecting the reaction in a cooled falling film absorber having integral cooling passages and to which liquid water is fed to form the falling film. In another embodiment, the reaction is effected in a packed tower with a substantial proportion of the product acid being recycled through an external heat exchanger and diluted with water.
    公开号:SU1421255A3
    申请号:SU813355600
    申请日:1981-11-16
    公开日:1988-08-30
    发明作者:С.Дж.Фредетт Морис
    申请人:Эрко Индастриз Лимитед (Фирма)；
    IPC主号:
    专利说明:

     CM
    This invention relates to methods for producing chlorine dioxide used as oxidant, disinfectant, etc.
    The aim of the invention is to increase the efficiency of the process by reducing energy consumption and loss of hydrochloric acid.
    11 p and meer. The following is loaded into the reactor: sodium chlorate, which reacts with chlorine ion in a hydroxy-acidic medium according to the following reaction
    NaC105 + (1-x) NaCUHCl +
    2
    , j-b 1/2 Clj + H O + Na
    h about bv ;.
    The reaction medium is maintained at its boiling point under vacuum and pH 2-4.8. The resulting sodium sulfate precipitates and the gas mixture containing chlorine dioxide, elemental chlorine to the vapor is sent to the adsorber irrigated with water. This absorbs all chlorine dioxide and partly elemental chlorine from the vapor gas mixture, and the residual gas mixture is further directed are put into the second reaction zone, in which it is contacted with sulfur dioxide in an aqueous medium in a cooled absorber in film mode or adjustment column “In this reaction zone when chlorine interacts with sulfur dioxide in water second environment formed
    A mixture of hydrochloric and sulfuric acids is produced that is recycled to the chlorine dioxide formation stage. The temperature of the reaction mixture is kept lower and the acidity of the medium is within 6-14 NO. Running the process outside the limits of the parameters gives either a dilute acid stream that drastically reduces the evaporation load. chlorine dioxide generator, or to the boiling of the mixture, which begins to evaporate hydrogen chloride, resulting in increased sweat1) and HC1 with waste
    0
    five
    0 5 jg
     . 40
    45
     and chlorine dioxide production is reduced. Thus, when Cl2 interacts with SOj at 4 N medium, 2250 kg / g of additional steam is required to evaporate water in the first reaction zone, and when the medium is normal, hydrogen chloride is lost on acid due to its high partial pressure with
    The unreacted gas in the second reaction zone is sent to a water-sprayed reactor, where residual sulfur dioxide and chlorine react to form a weak acid mixture, which is recycled to the second reaction zone.
    The proposed method allows to more effectively obtain chlorine dioxide, it is more economical due to the fact that it reduces the loss of hydrogen chloride, as well as energy consumption, and water evaporation in the first reaction zone is consumed.
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    A method of producing chlorine dioxide, which includes reacting sodium chlorate with chlorine ion in an aqueous hydrochloric acid medium at the boiling point of the reaction medium under vacuum, separating the precipitate resulting from sodium sulfate, removing the desired product from the reaction gas mixture by absorption, then contacting the residual gas mixture with sulfur dioxide in an aqueous medium to form a mixture of hydrochloric and sulfuric acids and recycling the resulting mixture of acids to the stage of interaction of the initial reagents, differing in That, in order to increase the efficiency of the process by reducing energy consumption and loss of hydrochloric acid, contacting the residual gas mixture with sulfur dioxide is realized at a temperature below 70 ° C with indirect heat exchange and maintaining the acidity of the mixture within 6-14 N.
    类似技术:
    公开号 | 公开日 | 专利标题
    US4473540A|1984-09-25|High efficiency chlorine dioxide process
    US4465658A|1984-08-14|Chlorine dioxide process
    US3789108A|1974-01-29|Production of chlorine dioxide
    SU1421255A3|1988-08-30|Method of producing chlorine dioxide
    US4086329A|1978-04-25|Integrated chlorine dioxide producing system
    US3971844A|1976-07-27|Method for removing sodium sulfate from aqueous solutions
    CA1318769C|1993-06-08|Process for production of chlorine dioxide
    US3321275A|1967-05-23|Process for recovering sulfur dioxide and ammonia from aqueous scrubbing solution obtained from ammonia scrubbing of gases containing sulfur oxides
    US5458858A|1995-10-17|Integrated procedure for high yield production of chlorine dioxide
    US3477815A|1969-11-11|Process for recovering sulfur dioxide from flue gas
    US4203959A|1980-05-20|Process for the preparation of nitrous oxide
    JPH0621005B2|1994-03-23|Chlorine dioxide manufacturing method
    US4393036A|1983-07-12|Production of mixed sulfuric and hydrochloric acid feed and chlorine dioxide generation therewith
    CA2764953C|2018-01-02|Process for the production of chlorine dioxide
    US4678654A|1987-07-07|Process for production of chlorine dioxide
    AU2010305879B2|2013-10-10|Process for production of chlorine dioxide
    US3733395A|1973-05-15|Process for producing chlorine dioxide,chlorine and a neutral sulfate salt in the sulfate or kraft process of preparing wood pulp
    FI79078B|1989-07-31|FOERFARANDE FOER FRAMSTAELLNING AV KLORDIOXID.
    US3524728A|1970-08-18|Closed cycle system for the generation of chlorine dioxide
    EP0131378B1|1989-05-10|Process for the production of chlorine dioxide
    US3954955A|1976-05-04|Process for working up the wash solution obtained in the washing of SO2 -containing off-gases
    US4178356A|1979-12-11|Process for manufacturing chlorine dioxide
    US4285923A|1981-08-25|Manufacture of calcium nitrite solutions with low nitrate content
    CA1170816A|1984-07-17|Production of mixed acid feed for chlorine dioxidegeneration
    WO1986007546A1|1986-12-31|Process for the recovery and utilization of sulphur dioxide contained in sulphurous gases, such as flue gases
    同族专利:
    公开号 | 公开日
    CA1171238A|1984-07-24|
    PL128562B1|1984-02-29|
    FI72107B|1986-12-31|
    PL233866A1|1982-06-21|
    FI813645L|1982-05-18|
    FR2494253B1|1986-03-07|
    US4393035A|1983-07-12|
    SE8106715L|1982-05-18|
    JPH0243682B2|1990-10-01|
    AR224975A1|1982-01-29|
    BR8107450A|1982-08-10|
    JPS57111205A|1982-07-10|
    SE455700B|1988-08-01|
    FR2494253A1|1982-05-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR690603A|1929-05-03|1930-09-24|Phosphates Et Superphosphates|Simultaneous manufacturing process of sulfuric acid and hydrochloric acid|
    US2481241A|1946-02-15|1949-09-06|Int Paper Canada|Method for removing chlorine from mixtures containing chlorine dioxide and chlorine|
    US3864456A|1964-08-13|1975-02-04|Electric Reduction Co|Manufacture of chlorine dioxide, chlorine and anhydrous sodium sulphate|
    US3347628A|1964-12-28|1967-10-17|Anglo Paper Prod Ltd|Production of chlorine dioxide|
    NZ179526A|1974-12-13|1979-01-11|Erco Ind Ltd|Production of chlorine dioxide|
    US4086329A|1974-12-13|1978-04-25|Erco Industries Limited|Integrated chlorine dioxide producing system|
    ZA757825B|1975-12-15|1976-12-29|Erco Ind Ltd|Integrated chlorine dioxide producing systems|
    CA1088274A|1976-03-24|1980-10-28|Alain Caillol|Process and installation for the manufacture of chlorine dioxide|
    FR2383122B2|1977-03-07|1981-11-13|Chimiques|SE442523B|1981-06-22|1986-01-13|Mo Och Domsjoe Ab|PROCEDURE FOR PREVENTING EMISSIONS OF SULFUR INHALING GASES IN THE PREPARATION OF CHEMICAL CELLULOSAMASSA|
    SE452756B|1985-03-04|1987-12-14|Eka Nobel Ab|PROCEDURE FOR THE PREPARATION OF CHLORIDE Dioxide|
    SE452757B|1985-04-01|1987-12-14|Eka Nobel Ab|PROCEDURE FOR THE PREPARATION OF CHLORIDE Dioxide|
    US5066477A|1988-08-10|1991-11-19|Tenneco Canada Inc.|Production of chlorine dioxide|
    US5324497A|1992-02-26|1994-06-28|Westerlund G Oscar|Integrated procedure for high yield production of chlorine dioxide and apparatus used therefor|
    US5433938A|1992-10-23|1995-07-18|Vulcan Chemicals|Chlorine-destruct method|
    US6190636B1|1998-10-13|2001-02-20|Mohammed N. I. Khan|Chloro-hydrogenation of sodium sulfate and other alkali-metal sulfates|
    CN101421182A|2006-04-10|2009-04-29|阿克佐诺贝尔股份有限公司|The method for preparing dioxide peroxide|
    CA2648673C|2006-04-10|2018-08-28|Thomas E. Woodruff|Process for the production of chlorine dioxide|
    FI122623B|2009-10-30|2012-04-30|Kemira Oyj|Process for the preparation of chlorine dioxide|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    GB8036835|1980-11-17|
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