• 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:
    Chlorine dioxide is generated very efficiently and safely by reducing a chlorate in a strong acid in the presence of a complex catalyst consisting of palladium(II) and an amino acid or an alkali metal salt thereof.
    公开号:SU871729A3
    申请号:SU782689853
    申请日:1978-11-24
    公开日:1981-10-07
    发明作者:Иса Исао；Эбисава Макото；Сибуя Мориоки
    申请人:Дзе Джапэн Кармит Ко., Лтд (Фирма)；
    IPC主号:
    专利说明:

    (54) METHOD FOR OBTAINING CHLORINE DIOXIDE
    The invention relates to methods for producing chlorine dioxide and can be used in the pulp and paper industry. A known method for producing chlorine dioxide is made by reducing the sodium chlorate in an acidic medium at a temperature of 20-90 ° C and a pressure of 20-400 mm Hg. Art. in the presence of a catalyst containing palladium and RVIKG-. a tone with the general formula R — CO — C (R Yu — CO — R, where R and R are H, alkyl having 1-10 atoms, C, or aryl, R and 1 is H or a methyl group. Concentration of this The catalyst in the reaction mixture is maintained at 0.0000 0.005 mol / l. The disadvantage of this method is the increased chlorine content in the product due to the reduced ratio R. / RJ, the reaction rate of NaCI03 2HCI-CIO 0.5Cl2. + NaCI- - H, OR 2 - reaction rate; NaCIOj -HCI - .NaCI-t- (2) The aim of the invention is to reduce the chlorine content in the product. This is achieved according to the above-described method of obtaining chlorine chloride by reducing chlorine sodium carbonate in an acidic medium at a temperature of 20-90 s and a pressure of 20-400 mm Hg, in the presence of a catcher, introduced in an amount that provides its concentration in the reaction mixture of 0.00001-0.1 mol / l, and containing palladium and organic compound is an amino acid, which uses a compound selected from the series: glycine, leucine, cysteine, arginine, aspartic acid, glutamic acid. The difference of this invention is that an amino acid is used as an organic compound. It is preferable to take a compound selected from the range: glycine, leucine, cysteine, arginine, aspartic acid, glutamic acid and introduce the catalyst in an amount to ensure its concentration in the reaction mixture is 0.00001-0.1 mol / l. This makes it possible to significantly increase the ratio yRJ (up to 99 for the concentration of the catalysts, Pd and glycine, 0.01 mol / l versus 77.7 in the known method) and, accordingly, reduce the chlorine content in the final product. The rationale for the concentration of the injected azitor cata is given in Table 1 ,. Table 1 Ratio Concentration - Composite Catalyzer, (1 mol Pd and 2 mol Glycine), mol / l Example, 150 MP of an aqueous solution containing 3.42 mol / l sodium chlorate, loaded into a four-necked flask with a capacity of 500 ml and kept at. 150 ml of another solution containing 0.8 mol / l of hydrochloric acid, 3.42 mol / l of sodium chloride and a composite catalyst, composed of 1 mol of palladium (T1) and 2 moles of glycine, are heated up and added to the first solution. Chlorine dioxide is thus obtained from the reaction medium: 0.4 mol / l of hydrochloric acid, 0.94 mol / l of sodium chlorate, 3.42 mol / l of sodium chloride and 0.01 mol / l of a composite catalyst.
    ) -leucine
    Pd (I I) -; cysteine

    Pd (I I) -aspartic acid
    Pd (I I) -glyutgilic acid
    Pd (II) -arginine
    Example4. 2.5 l of an aqueous solution containing 1.0 mol / l sodium chlorate, 1.4 mol / l sulfate 65
    68 60
    70
    63 71
    sodium and 0.0001 mol / l of a composite catalyst consisting of 1 mol of palladium (T1) and 2 moles of glycine. The reaction medium is stirred by pume of introducing air into it with a rate of 500 ml / min and then the reaction medium and gas phase are anashised every 5 minutes. The ratio of the rate of the action (1) to the speed of the reaction. 2) avno 99. Example2. A 2.5 l aqueous solution containing 3.0 mol / l sodium chlorate, 3.6 mol / l sodium chloride and 0.001 mol / l composite catalyst consisting of 1 mol of palladium (II) and 2 moles of glycine is placed into a single-chamber generator The Zli tank with a capacity of continuously discharging water from it at a rate of approximately 3 ml / min under a reduced pressure of 200 mm Hg. and temperature. 12 mol / l of hydrochloric acid 6, S mol / l of sodium chlorate are continuously supplied to the single-chamber crystallizer generator to maintain substantially constant volume. and composition of the reaction medium. Samples for analysis of the gas mixture and the reaction medium are taken every 30 minutes. The average composition of the reaction mixture is 0.2 mol / l hydrochloric acid, 2.8 mol / l sodium chlorate, and 3.7 mol / l sodium chloride. The ratio of the reaction rate C 1) to the reaction rate (2) is 66. Although sodium chloride begins to crystallize 3 hours after the start of the reaction, there is no decrease in the reaction efficiency and a change in the concentration of the composite catalyst. Froze The experiments are described in Example 2, but the composition of the catalyst is changed. The results are summarized in table 2.
    placed in a single generator of an Evli tank with a capacity of Zli is continuously drained of water at a rate of approximately 3 g / min under a reduced pressure of 190 mm Hg. and a temperature of 7cPc. An aqueous solution containing 3 mol / l of sodium chlorate and 3 mol / l of sodium chloride and 50 wt.% Sulfuric acid is continuously fed to the single-chamber crystallizer to maintain a substantially constant volume and composition of the reaction medium. Samples for the gas mixture and the reaction medium are removed every 30 minutes. The average composition of the reaction medium is 0.94 mol / l sodium chlorate, 0.85 mol / l sodium chloride, and 2.0 mol / l sulfuric acid. The ratio of the reaction rate is NaC I0 “f NaCI“ (, 1/2 Cl2 + -Na2 S04-fH 0 (G)) and the reaction rate HaCiOA-S aCti ZNd50d-ZS124-ZMa2 50 -4.3H2P (S) is 97;
    权利要求:
    Claims (3)
    [1]
    Claim 1. Chlorine dioxide production method by chlorate reduction
    sodium in an acidic medium at a temperature of 20-90 s and a pressure of 20-400 mm Hg, Art. in the presence of a catalyst containing pgcladium and an organic compound, characterized in that, in order to reduce the chlorine content in the product, an amino acid is used as an organic compound.
    [2]
    2. A method according to claim 1, characterized in that a compound selected from the following is taken as an amino acid: glycine, leucine, cysteine, arginine, aspartic acid, glutavyl acid.
    five
    [3]
    3. A process according to claim 1, characterized in that the catalyst is introduced in an amount that ensures its concentration in the reaction mixture is 0.00001-0.1 mol / l.
    0
    Sources of information taken into account in the examination 1. US patent 4051229, cl.423478, published. 09/27/77 (prototype).
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    同族专利:
    公开号 | 公开日
    US4154810A|1979-05-15|
    FR2409961A1|1979-06-22|
    FI66819C|1984-12-10|
    JPS5474296A|1979-06-14|
    FI783596A|1979-05-27|
    CA1089628A|1980-11-18|
    SE7812145L|1979-05-27|
    JPS5545483B2|1980-11-18|
    BR7807733A|1979-07-31|
    FI66819B|1984-08-31|
    FR2409961B1|1980-09-19|
    SE438503B|1985-04-22|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE1157077B|1963-04-30|1963-11-07|Perutz Photowerke G M B H|Process for the preparation of photographic silver halide emulsions stabilized with palladium salts|
    US3563702A|1968-03-05|1971-02-16|Hooker Chemical Corp|Production of chlorine dioxide|
    GB1216447A|1969-07-16|1970-12-23|Nippon Soda Co|A process for the manufacture of chlorine dioxide|
    FR2163818A5|1970-06-10|1973-07-27|Electric Reduction Cy Ca|
    JPS5442839B2|1975-06-20|1979-12-17|
    CA1195477A|1976-02-24|1985-10-22|W.Howard Rapson|Production of chlorine dioxide at high efficiency|
    JPS5444278B2|1976-07-12|1979-12-25|BR8005356A|1979-08-28|1981-03-10|Erco Ind Ltd|CATALYTIC PRODUCTION OF CHLORINE DIOXIDE|
    JPS5953205B2|1981-05-19|1984-12-24|Japan Carlit Co Ltd|
    US4848699A|1988-02-22|1989-07-18|Jing Lin Long|Car-shaped video tape rewinder|
    SE464193B|1988-10-20|1991-03-18|Eka Nobel Ab|PROCEDURE FOR PREPARATION OF CHLORIDE Dioxide|
    US5435984A|1992-04-28|1995-07-25|Degussa Corporation|Catalyst for the synthesis of chlorine dioxide|
    US5391533A|1993-02-19|1995-02-21|Amtx, Inc.|Catalyst system for producing chlorine dioxide|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP14195477A|JPS5545483B2|1977-11-26|1977-11-26|
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