发明公开
- 专利标题： Process for producing chlorine dioxide
- 专利标题（中）： Verfahren zur Herstellung von Chlordioxid。
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申请号： EP94200267.6申请日： 1994-02-02
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公开(公告)号： EP0612685A2公开(公告)日： 1994-08-31
- 发明人: Falgén, Helena , Sundström, Göran , Landfors, Johan , Sokol, John C.
- 申请人： EKA NOBEL AB
- 申请人地址： S-445 80 Bohus SE
- 专利权人： EKA NOBEL AB
- 当前专利权人： EKA NOBEL AB
- 当前专利权人地址： S-445 80 Bohus SE
- 代理机构： Jönsson, Christer
- 优先权： US23561 19930226; SE9302279 19930702
- 主分类号： C01B11/02
- IPC分类号： C01B11/02 ; C25B1/46
摘要：
The invention relates to a process of producing chlorine dioxide comprising the steps: Providing a reactor with an aqueous acidic reaction medium containing alkali metal chlorate and sulfate, wherein the concentration of sulfate exceeds about 3 moles/liter but is less than saturation; reducing chlorate ions in said reaction medium to form chlorine dioxide; withdrawing chlorine dioxide gas from the reaction medium; withdrawing reaction medium from the reactor and transferring it to an electrochemical cell; electrolysing said reaction medium to increase the acidity and decrease the content of alkali metal ions; recycling the acidified reaction medium to the reactor; adding make up alkali metal chlorate to the reaction medium before or after the electrochemical cell; wherein the process is performed substantially without crystallisation of sulfate or chlorate.
公开/授权文献
- EP0612685B1 Process for producing chlorine dioxide 公开/授权日：1996-12-11
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