发明授权
- 专利标题： Process for removing sulfur dioxide contained in a gas
- 专利标题（中）： 用于除去气体中所含的二氧化硫的方法
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申请号： US516918申请日： 1974-10-22
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公开(公告)号： US3974257A公开(公告)日： 1976-08-10
- 发明人: Claude Dezael , Andre Deschamps , Henri Gruhier
- 申请人： Claude Dezael , Andre Deschamps , Henri Gruhier
- 申请人地址： FR Rueil-Malmaison
- 专利权人： Institut Francais du Petrole, des Carburants et Lubrifiants et Entreprise de Recherches et d'Activities Petrolieres Elf
- 当前专利权人： Institut Francais du Petrole, des Carburants et Lubrifiants et Entreprise de Recherches et d'Activities Petrolieres Elf
- 当前专利权人地址： FR Rueil-Malmaison
- 优先权： FR73.37655 19731022
- 主分类号： B01D53/50
- IPC分类号： B01D53/50 ; C01B17/60 ; C01B17/00
摘要：
A SO.sub.2 containing gas, for example a stack gas, is purified according to a multi-step process, which comprises washing said gas with an aqueous ammonia solution, treating the resulting solution with hydrochloric acid, whereby SO.sub.2 and an aqueous ammonium chloride solution are obtained and separated. The ammonium chloride solution is then reacted with magnesium oxide to recovery ammonia and the resulting magnesium chloride is cracked to produce hydrochloric acid and magnesium oxide, the ammonia, hydrochloric acid and magnesium oxide being recycled to the process.
公开/授权文献
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