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1. 发明授权

US5433932A Process to recover azide values from azide-based gas generating materials 失效
标题翻译：从叠氮化物气体发生材料中回收叠氮化物值的方法
公开(公告)号：US5433932A
公开(公告)日：1995-07-18
申请号：US3557
申请日：1993-01-13
申请人： John F. Clausen , Christopher C. Shih
发明人： John F. Clausen , Christopher C. Shih
IPC分类号： A62D3/00 , A62B35/04 , B60R21/16 , C01B11/18 , C01B21/08 , C06B21/00 , B01D9/02
CPC分类号： C06B21/0091 , C01B11/18 , C01B21/08 , Y10S149/124
摘要： In a process for recovering an alkali metal azide from a waste gas generating material containing the alkali metal azide and a metal oxide reactable with the azide, the gas generating material is mixed with a solvent for the alkali metal azide. This produces a slurry comprising (i) a solution comprising the solvent and the alkali metal azide, and (ii) the metal oxide. The slurry is separated into a liquid stream comprising primarily the solution and a sludge stream comprising primarily the metal oxide. The liquid stream is filtered in a filter to produce a filtrate which is substantially free of metal oxide and is then concentrated by evaporation of the solvent to produce crystals of the alkali metal azide. The separation may be carried out by a filter or centrifuge to produce a filter or centrifuge cake. The sludge obtained from the slurry is reslurried to recover additional azide, and the resulting slurry is again separated into a sludge and a liquid stream by a filter or centrifuge. The filtrate or centrate is recycled and can be used for dissolution of additional waste gas generating material.
摘要翻译：在从含有碱金属叠氮化物的废气产生材料和与叠氮化物反应的金属氧化物中回收碱金属叠氮化物的方法中，气体发生材料与碱金属叠氮化物的溶剂混合。这产生浆料，其包含（i）包含溶剂和碱金属叠氮化物的溶液，和（ii）金属氧化物。将浆料分离成主要包含溶液的液体物流和主要包含金属氧化物的污泥流。将液体流在过滤器中过滤以产生基本上不含金属氧化物的滤液，然后通过蒸发溶剂浓缩以产生碱金属叠氮化物的晶体。分离可以通过过滤器或离心机进行以产生过滤器或离心饼。将从浆料获得的污泥重新浆化以回收另外的叠氮化物，并且通过过滤器或离心机将所得浆料再次分离成污泥和液体流。滤液或浓缩液循环使用，可用于其他废气产生材料的溶解。

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