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1. 发明授权

US4186176A Method of simultaneously removing sulfur dioxide and nitrogen oxides from exhaust gases 失效
标题翻译：同时从废气中除去二氧化硫和氮氧化物的方法
公开(公告)号：US4186176A
公开(公告)日：1980-01-29
申请号：US927249
申请日：1978-07-21
申请人： Taketsugu Kitamura , Hitoshi Takagi
发明人： Taketsugu Kitamura , Hitoshi Takagi
IPC分类号： B01D53/60 , C01B17/04 , B01D53/00
CPC分类号： B01D53/60
摘要： A method of simultaneously removing sulfur dioxide and nitrogen oxides from an exhaust gas which comprises the steps of:contacting the exhaust gas with an aqueous absorbing solution containing an iron chelate complex and an alkali metal sulfite to form alkali metal sulfur oxides comprising an alkali metal dithionate in the aqueous absorbing solution;separating the alkali metal sulfur oxides formed and accumulated from part or the whole of the aqueous absorbing solution by crystallization; andsubjecting the alkali metal sulfur oxides separated together with a carbonaceous material to decomposition-reduction reaction at a temperature of at least about 700.degree. C. to form an alkali metal sulfide and a gas comprising sulfur dioxide and carbon dioxide.
摘要翻译：一种同时从废气中除去二氧化硫和氮氧化物的方法，其特征在于包括以下步骤：使废气与含有铁螯合物和碱金属亚硫酸盐的吸收水溶液接触，形成碱金属硫氧化物，在吸收水溶液中; 通过结晶分离由吸收水溶液的一部分或全部形成和积聚的碱金属硫氧化物; 并且在至少约700℃的温度下将与碳质材料一起分离的碱金属硫氧化物进行分解还原反应，以形成碱金属硫化物和包含二氧化硫和二氧化碳的气体。

2. 发明授权

US4044101A Method of treating exhaust gases containing nitrogen oxides and sulfurous acid gas 失效
标题翻译：处理含有氮氧化物和亚硫酸气体的废气的方法
公开(公告)号：US4044101A
公开(公告)日：1977-08-23
申请号：US641870
申请日：1975-12-17
申请人： Tokuichi Hisamatsu , Taketsugu Kitamura , Takeshiro Saito , Hitoshi Takagi , Takuzo Sekiya
发明人： Tokuichi Hisamatsu , Taketsugu Kitamura , Takeshiro Saito , Hitoshi Takagi , Takuzo Sekiya
IPC分类号： B01D53/34 , C01B21/00
CPC分类号： B01D53/34
摘要： A method of removing NO.sub.x and SO.sub.2 from an exhaust gas containing NO.sub.x and SO.sub.2 which comprises contacting an exhaust gas containing NO.sub.x and SO.sub.2 with an aqueous solution containing M.sub.2 SO.sub.3, an iron ion and an aminopolycarboxylic acid to absorb NO.sub.x and SO.sub.2 in the aqueous solution and treating the resulting absorbing solution while preventing a contact of the solution with the exhaust gas, thereby to form M.sub.2 S.sub.2 O.sub.6 in the absorbing solution and reducing NO.sub.x to N.sub.2. The M.sub.2 S.sub.2 O.sub.6 formed in the absorbing solution can be easily removed by crystallization separation. With such method, NO.sub.x and SO.sub.2 can be removed from exhaust gases at high rates and the absorbing solution can be easily regenerated and recycled to the absorbing zone.
摘要翻译：一种从含有NO x和SO 2的废气中除去NO x和SO 2的方法，它包括使含有NO x和SO 2的废气与含有M2SO3，铁离子和氨基多羧酸的水溶液接触以吸收水溶液中的NO x和SO 2，所得到的吸收溶液同时防止溶液与废气接触，从而在吸收溶液中形成M2S2O6并将NOx还原成N2。在吸收溶液中形成的M2S2O6可以通过结晶分离容易地除去。通过这种方法，可以高效率地从废气中除去NOx和SO2，并且吸收溶液可以容易地再生并再循环到吸收区。

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