JPH0340903A - Method for decomposing chlorine dioxide - Google Patents
Method for decomposing chlorine dioxideInfo
- Publication number
- JPH0340903A JPH0340903A JP2180646A JP18064690A JPH0340903A JP H0340903 A JPH0340903 A JP H0340903A JP 2180646 A JP2180646 A JP 2180646A JP 18064690 A JP18064690 A JP 18064690A JP H0340903 A JPH0340903 A JP H0340903A
- Authority
- JP
- Japan
- Prior art keywords
- chlorine
- chlorine dioxide
- gas
- dioxide
- gaseous mixture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 235000019398 chlorine dioxide Nutrition 0.000 title claims abstract description 42
- 239000004155 Chlorine dioxide Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims description 16
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000000460 chlorine Substances 0.000 claims abstract description 19
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 14
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 229910001902 chlorine oxide Inorganic materials 0.000 claims description 7
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 abstract description 14
- 238000006243 chemical reaction Methods 0.000 abstract description 12
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- 239000008246 gaseous mixture Substances 0.000 abstract 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000011780 sodium chloride Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 27
- XTEGARKTQYYJKE-UHFFFAOYSA-M chlorate Inorganic materials [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 description 14
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000005868 electrolysis reaction Methods 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- -1 alkali metal chlorate Chemical class 0.000 description 2
- 229910001514 alkali metal chloride Inorganic materials 0.000 description 2
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- MAYPHUUCLRDEAZ-UHFFFAOYSA-N chlorine peroxide Chemical compound ClOOCl MAYPHUUCLRDEAZ-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- BZSXEZOLBIJVQK-UHFFFAOYSA-N 2-methylsulfonylbenzoic acid Chemical compound CS(=O)(=O)C1=CC=CC=C1C(O)=O BZSXEZOLBIJVQK-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 101100219440 Schizosaccharomyces pombe (strain 972 / ATCC 24843) cao2 gene Proteins 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000006298 dechlorination reaction Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は二酸化塩素の分解方法に関し、特にアルカリ金
属塩化物の電解によって生じるアルカリ金属塩素酸塩を
塩酸で還元する際に副生ずる二酸化塩素を効率よく分解
する方法を提供する。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a method for decomposing chlorine dioxide, and in particular to a method for decomposing chlorine dioxide, which is a by-product when reducing alkali metal chlorate produced by electrolysis of alkali metal chloride with hydrochloric acid. To provide an efficient method of decomposition.
（従来の技術及び発明が解決しようとする課題）アルカ
リ金属塩化物の電解によりアルカリ金属水酸化物及び塩
素を製造するプロセスは種々提案されている。該プロセ
スにおいて電解槽の陽極室には一定濃度の塩水が供給さ
れ電解により濃度の低下した塩水は戻り塩水として槽外
へ取出され、再度塩水濃度を調製して電槽へ供給される
。この際、電解により塩素酸ソーダ等の金属塩素酸塩が
生成されるため、これをそのままにすると電解槽に供給
される塩水中の金属塩素酸濃度は次第に高くなる。この
ような塩水を用いて電解するとアルカリ金属水酸化物中
の金属塩素酸塩濃度が高くなるため、該製品の用途が制
限されることや装置材料の腐食が懸念される。従って、
電解によって生じた金属塩素酸塩を分解する必要が生じ
る。(Prior Art and Problems to be Solved by the Invention) Various processes have been proposed for producing alkali metal hydroxides and chlorine by electrolysis of alkali metal chlorides. In this process, salt water of a certain concentration is supplied to the anode chamber of the electrolytic cell, and the salt water whose concentration has been reduced by electrolysis is taken out of the cell as return salt water, and the salt water concentration is adjusted again and supplied to the cell. At this time, metal chlorates such as sodium chlorate are produced by electrolysis, so if this is left as is, the concentration of metal chlorates in the brine supplied to the electrolytic cell will gradually increase. If such salt water is used for electrolysis, the metal chlorate concentration in the alkali metal hydroxide will increase, so there are concerns that the uses of the product will be limited and that equipment materials will corrode. Therefore,
It becomes necessary to decompose the metal chlorate produced by electrolysis.
従来、金属塩素酸塩を分解する方法としては、例えば塩
酸により還元する方法や硫酸により分解する方法等が用
いられる。この際の反応は目的とする生成物を何にする
かにより選定されており、塩素ガスを回収する場合には
、金属塩素酸塩に対して過剰の塩酸により還元する方法
が一般的である。Conventionally, methods for decomposing metal chlorates include, for example, reduction with hydrochloric acid and decomposition with sulfuric acid. The reaction at this time is selected depending on the desired product, and when recovering chlorine gas, a general method is to reduce the metal chlorate with excess hydrochloric acid.
しかしながら、上記方法においても塩素ガス中に微量の
二酸化塩素が生成することが避けられず、該二酸化塩素
（（ＪＯ□）の濃度は、金属塩素酸塩あるいは塩酸濃度
により異なるが一般にはｃｇｏｚ／Ｃｊ！ｚ＝５〜１５
％程度である。このままでは不安定で爆発等の危険かが
生ずるため通常は塩素ガスで希釈して５−６％程度にす
る。このような二酸化塩素を含む塩素ガスは、塩素ガス
の純度が低下するために高純度の塩素ガスを用いる用途
に適さないこと、あるいは有機物と反応させ有機塩化物
を生成する場合には水を生成するために装置の腐食が懸
念される。したがって、塩素ガス中の二酸化塩素を効率
よく分解させることが必要である。However, even in the above method, it is unavoidable that a trace amount of chlorine dioxide is generated in the chlorine gas, and the concentration of chlorine dioxide ((JO□) varies depending on the metal chlorate or hydrochloric acid concentration, but is generally cgoz/Cj !z=5~15
It is about %. If left as is, it will be unstable and pose a risk of explosion, so it is usually diluted with chlorine gas to about 5-6%. Chlorine gas containing such chlorine dioxide is not suitable for applications that use high-purity chlorine gas because the purity of the chlorine gas decreases, or when reacting with organic matter to generate organic chloride, water may be generated. Therefore, there is a concern about equipment corrosion. Therefore, it is necessary to efficiently decompose chlorine dioxide in chlorine gas.
−ｉに二酸化塩素は１００℃以上のガス温度にすると塩
素と酸素に分解することは公知である。具体的には、例
えばシェルアンドチューブ型の反Ｇ容器を用い、シェル
側を蒸気により加熱し、チューブ側に二酸化塩素ガスを
流す方法等がある。-i It is known that chlorine dioxide decomposes into chlorine and oxygen when the gas temperature is increased to 100° C. or higher. Specifically, for example, there is a method of using a shell-and-tube type anti-G container, heating the shell side with steam, and flowing chlorine dioxide gas into the tube side.
しかしながら、単にガス温度１００℃以上に上昇させる
方法では、上述の如く微量（おおよそ５〜６％）の二酸
化塩素を含む塩素ガスのような系では、分解しようとす
るガスに対して他のガスの星が多くなるため、ガス全体
を均一な温度に上昇させるエネルギーが増大し、しかも
分解効率が低下するという問題があった。However, simply raising the gas temperature to 100°C or higher does not work, as mentioned above, in systems such as chlorine gas containing a trace amount (approximately 5 to 6%) of chlorine dioxide, the amount of other gases As the number of stars increases, the energy required to raise the entire gas to a uniform temperature increases, and the problem is that the decomposition efficiency decreases.
（課題を解決するための手段及び作用効果）本発明者等
は上述したような塩素と二酸化塩素との混合ガス中の二
酸化塩素を効率よく分解する方法について鋭意検討した
結果、塩素中の二酸化塩素濃度を特定するとともに該混
合ガスを特定な加熱手段を用いて分解させることを見出
し、本発明を提案するに至った。(Means and Effects for Solving the Problems) As a result of intensive study on a method for efficiently decomposing chlorine dioxide in a mixed gas of chlorine and chlorine dioxide as described above, the present inventors found that chlorine dioxide in chlorine The present inventors discovered that the concentration of the mixed gas can be specified and that the mixed gas can be decomposed using a specific heating means, leading to the proposal of the present invention.
本発明は塩素と二酸化塩素の混合ガスを該ガス中の塩素
に対する二酸化塩素の割合が０．５容量％以上になるよ
うに調整した後、該ガスを局部的に二酸化塩素の分解温
度よりも高く加熱することを特徴とする二酸化塩素の分
解方法である。In the present invention, after adjusting a mixed gas of chlorine and chlorine dioxide so that the ratio of chlorine dioxide to chlorine in the gas is 0.5% by volume or more, the gas is locally heated to a temperature higher than the decomposition temperature of chlorine dioxide. This is a method for decomposing chlorine dioxide, which is characterized by heating.
本発明は塩素と二酸化塩素との混合との混合ガスを熱分
解するに際して、予め塩素と二酸化塩素のガス濃度の割
合をＣｌＯ２／ＣＩ！２が０．５容量％以上、好ましく
は３〜５容量％となるように調整した後、該ガスを特定
な加熱手段により、分解させることが特徴であり、この
ような手段を用いることにより、上記混合ガスを均一に
熱分解温度に保持して分解させる方法よりもエネルギー
消費量が少なく且つ効率的に分解することが出来る。こ
の原因については明確ではないが本発明者等は次のよう
に考える。即ち、二酸化塩素の分解に際しては、反応器
内を均一に該ガスの分解温度以上に保持しなくとも局部
的に二酸化塩素を分解させる熱源を存在しさせることで
、該分解部で、例えばＣｊ！ Ｏｚ −Ｃ７！Ｏ＋Ｑの
反応に伴うＣＺ○や○ラジカルが生し一旦該ラジカルが
生じると例えばＣ１○＋ＣＩＯ→ｃｉ０２ ＋０２の反
応のようにラジカル同志の反応や或いはＣＩＯ，＋〇−
Ｃ２０３のような二酸化塩素と０ラジカルの反応により
Ｃ１○、を生成させ、該０１０３同志が例えばＣＩ２０
３ ＋ ＣＩ２０３− ＣＩ２０ｚ ＋３０ｚの反応に
より塩素と酸素に分解する反応等により雰囲気中のガス
温度を余り上昇させなくとも容易に分解させることが出
来る。即ち、反応器全体を二酸化塩素の分解温度にしな
くても塩素ガスと二酸化塩素ガスの濃度比を特定した状
態では一定量以上のホノトスボソトを存在させることで
二酸化塩素の分解は極めて進行し易くなるものと考えら
れる。In the present invention, when thermally decomposing a mixed gas of chlorine and chlorine dioxide, the gas concentration ratio of chlorine and chlorine dioxide is set in advance to ClO2/CI! After adjusting the amount of 2 to be 0.5% by volume or more, preferably 3 to 5% by volume, the gas is decomposed by a specific heating means, and by using such a means, This method requires less energy and can be decomposed more efficiently than the method of decomposing the mixed gas while uniformly maintaining it at the thermal decomposition temperature. Although the cause of this is not clear, the inventors of the present invention think as follows. That is, when decomposing chlorine dioxide, by providing a heat source that locally decomposes chlorine dioxide without uniformly maintaining the inside of the reactor at a temperature higher than the decomposition temperature of the gas, for example, Cj! Oz-C7! CZ○ and ○ radicals are generated as a result of the O+Q reaction, and once these radicals are generated, reactions between radicals, such as the reaction of C1○+CIO→ci02 +02, or CIO, +〇-
By the reaction of chlorine dioxide such as C203 with 0 radical, C1○ is generated, and the 0103 comrades are, for example, CI20.
3 + CI203- CI20z +30z can be easily decomposed into chlorine and oxygen without increasing the gas temperature in the atmosphere. In other words, even if the entire reactor is not brought to the chlorine dioxide decomposition temperature, the presence of more than a certain amount of chlorine dioxide will make it extremely easy for the decomposition of chlorine dioxide to proceed when the concentration ratio of chlorine gas and chlorine dioxide gas is specified. it is conceivable that.
塩素に対する二酸化塩素の割合（Ｃ１０□／ＣＡｚ）が
０．５容量％未満では、二酸化塩素を効率よく分解させ
ることは出来ない。また、上限については特に限定され
ないが、（：、ｌＯｚ濃度があまり高くなると急激な反
応が起こり、反応温度が上昇するため反応器の材質が問
題となる。そのため、ＣＡＯ２／（１２の割合は、１０
容量％以下とすることが好ましい。ガス濃度を調整する
方法はそれぞれ目的に応じたガス、一般には塩素ガスで
希釈すればよい。If the ratio of chlorine dioxide to chlorine (C10□/CAz) is less than 0.5% by volume, chlorine dioxide cannot be decomposed efficiently. The upper limit is not particularly limited, but if the concentration of (:, lOz becomes too high, a rapid reaction will occur and the reaction temperature will rise, making the material of the reactor a problem. Therefore, the ratio of CAO2/(12 is 10
It is preferable to set it to % by volume or less. The gas concentration can be adjusted by diluting with a gas depending on the purpose, generally chlorine gas.
上記混合ガスは、局部的に二酸化塩素の分解温度よりも
高く加熱する。該加熱手段は特に制限されないが、一般
には１乃至複数本のヒーターを有する筒状体反応容器中
に上述したガスを通過させる方法が用いられる。この際
の反応容器の材質は耐熱性、耐塩素性のものでテフロン
等が好ましく用いられる。またヒーターは一般に石英ガ
ラスヒーターが用いられる。The mixed gas is locally heated to a temperature higher than the decomposition temperature of chlorine dioxide. The heating means is not particularly limited, but generally the method of passing the above-mentioned gas through a cylindrical reaction vessel having one or more heaters is used. The material for the reaction vessel at this time is heat resistant and chlorine resistant, and Teflon or the like is preferably used. Moreover, a quartz glass heater is generally used as a heater.
実施例に
酸化塩素（ＣＮＯ２）を１２％含む塩素ガスを脱クロレ
ート槽（電槽で発生した金属塩素酸塩を塩酸にて分解さ
せる槽）より６１１φの塩化ビニル製チューブで０．８
ｇ ／ Ｈの速度で引き出し、塩素ボンベより送気す
る希釈用の塩素ガス１．６ｍ／Ｈと混合し、ＣＩ Ｏｘ
／Ｃ１Ｋ ＝ ４％に調整する。このガス２．４ｎ？／
Ｈを逆火防止用の水封器を通し、ガラス製の反応器（２
８ａｍφ、１５０＋ｕ）へ導く。In an example, chlorine gas containing 12% chlorine oxide (CNO2) was extracted from a dechlorination tank (a tank in which metal chlorate generated in a battery tank is decomposed with hydrochloric acid) using a 611φ vinyl chloride tube to collect 0.8
The mixture is drawn out at a speed of 1.6 g/H and mixed with 1.6 m/H of chlorine gas for dilution supplied from a chlorine cylinder to produce CI Ox.
Adjust to /C1K = 4%. This gas 2.4n? /
Pass H through a water seal to prevent flashback, and place it in a glass reactor (2
8amφ, 150+u).
該反応器の側面より、１１００ｖ−１００のガラスヒー
ターの先端部を挿入して加熱すると、ガス温度が２５℃
から１３０°Ｃに上昇した。このときの反応器出口のｃ
ｚｏｚを分析すると０％であった。When the tip of a 1100V-100 glass heater is inserted into the side of the reactor and heated, the gas temperature reaches 25℃.
The temperature rose from 130°C to 130°C. c at the reactor outlet at this time
Analysis of zoz revealed that it was 0%.
同様に希釈用の塩素ガスにより反応器へ導くガス濃度（
Ｃ１０ｚ／ｃｘｚ）を２．７％に調製し、ヒーターによ
り加熱容量を３．７ Ｋｃａ Ｉ ／ ｍ Ｈで反応さ
せ、反応器出口のＣｌＯ２を分析すると０％であった。Similarly, the gas concentration (
C10z/cxz) was adjusted to 2.7%, the reaction was carried out using a heater at a heating capacity of 3.7 Kca I/mH, and ClO2 at the reactor outlet was analyzed and found to be 0%.
ガス温度の上昇は反応熱によるもので、Ｃβ０２を含ま
ない塩素ガスを流すと３０′Ｃまでしか上昇しなかった
。従って、本発明方法によれば、温度を５℃程度上昇さ
せれば良い。The increase in gas temperature was due to reaction heat, and when chlorine gas containing no Cβ02 was flowed, the gas temperature rose only to 30'C. Therefore, according to the method of the present invention, it is sufficient to raise the temperature by about 5°C.
Claims (1)
に対する二酸化塩素の割合が０．５容量％以上になるよ
うに調製した後、このガスを局部的に二酸化塩素の分解
温度よりも高く加熱することを特徴とする二酸化塩素の
分解方法。1) After preparing a mixed gas of chlorine and chlorine dioxide so that the ratio of chlorine dioxide to chlorine in the mixed gas is 0.5% by volume or more, this gas is locally heated to a temperature higher than the decomposition temperature of chlorine dioxide. A method for decomposing chlorine dioxide, which involves heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2180646A JPH0340903A (en) | 1990-07-10 | 1990-07-10 | Method for decomposing chlorine dioxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2180646A JPH0340903A (en) | 1990-07-10 | 1990-07-10 | Method for decomposing chlorine dioxide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0340903A true JPH0340903A (en) | 1991-02-21 |
| JPH0573681B2 JPH0573681B2 (en) | 1993-10-14 |
Family
ID=16086834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2180646A Granted JPH0340903A (en) | 1990-07-10 | 1990-07-10 | Method for decomposing chlorine dioxide |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0340903A (en) |
-
1990
- 1990-07-10 JP JP2180646A patent/JPH0340903A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0573681B2 (en) | 1993-10-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0544686B1 (en) | Chlorine dioxide generation from chloric acid | |
| EP0498484B1 (en) | Process for electrolytic production of alkali metal chlorate and auxiliary chemicals | |
| US5938916A (en) | Electrolytic treatment of aqueous salt solutions | |
| US5324497A (en) | Integrated procedure for high yield production of chlorine dioxide and apparatus used therefor | |
| US3763006A (en) | Process for producing chlorine dioxide | |
| KR910001138B1 (en) | Combined process for production of clorine dioxine and sodium hydroxide | |
| US3920801A (en) | Method of producing chlorine dioxide from hydrogen chloride | |
| EP0098500A1 (en) | Removal of chlorate from electrolyte cell brine | |
| EP0646095B1 (en) | Process for producing chlorine dioxide | |
| KR102248367B1 (en) | Production process of aqueous sodium hypochlorite solution | |
| US4510026A (en) | Process for electrolysis of sea water | |
| CA1105877A (en) | Process for producing chlorine dioxide | |
| CN106829866A (en) | The technique that a kind of use bittern produces hydrochloric acid | |
| JPH0340903A (en) | Method for decomposing chlorine dioxide | |
| GB757761A (en) | Preparation of alkali metal chlorates | |
| US3524728A (en) | Closed cycle system for the generation of chlorine dioxide | |
| JPS6163501A (en) | Method of decomposing chlorine dioxide | |
| JPH0122356B2 (en) | ||
| JPH0359003B2 (en) | ||
| GB714234A (en) | Manufacture of sodium chlorate | |
| JP2673518B2 (en) | How to remove chlorate in salt water | |
| CA1049950A (en) | Integrated system for the production of chlorine dioxide | |
| JPH07300302A (en) | Production of chlorine dioxide | |
| RU2758363C2 (en) | Method for electrolytic synthesis of cesium hexachlorrenate | |
| US3464901A (en) | Production of chlorates |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |