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    • 56. 发明申请
    • METHOD AND DEVICE FOR PROCESSING OILS AND SOLVENTS CONTAMINATED BY RADIOACTIVE SUBSTANCES
    • 用于处理放射性物质污染的油和溶剂的方法和装置
    • WO1996024937A1
    • 1996-08-15
    • PCT/FR1996000225
    • 1996-02-12
    • DEGUITRE, Joanes, PierreSTINGRE, Maurice
    • G21F09/18
    • G21F9/18Y10S210/912
    • The process includes the following steps: a) a predetermined volume of water is provided which has predetermined characteristics as to the content of dissolved oxygen, pH and REDOX potential; b) to said water volume is added a predetermined charge of oils and solvents contaminated by radioactive substances, said charge corresponding to a volume of oils and solvents which is a predetermined fraction of the predetermined water volume; c) said charge is subjected to the action of micro-organisms at a predetermined temperature and duration; d) at least part of the effluent obtained is taken; e) the water is separated from the materials contained in such effluent; f) the materials separated from said water are recycled or evacuated; g) the water free of materials contained in the effluent is regenerated so that it recovers said predetermined characteristics; h) at least part of said regenerated water is recycled; i) the cycle from the step a) is repeated.
    • 该方法包括以下步骤:a)提供预定体积的水,其具有关于溶解氧的含量,pH和REDOX电势的预定特性; b)向所述水体积加入被放射性物质污染的预定量的油和溶剂,所述电荷对应于作为预定水体积的预定分数的一定体积的油和溶剂; c)所述电荷在预定温度和持续时间内经受微生物的作用; d)取出所得废水的至少一部分; e)将水与包含在这些流出物中的物质分开; f)从所述水分离的材料被回收或抽空; g)再生含有流出物中的物质的水,使其回收所述预定特性; h)再循环至少部分所述再生水; i)重复步骤a)的循环。
    • 58. 发明申请
    • FLUID EXTRACTION
    • 流体萃取
    • WO1995033542A1
    • 1995-12-14
    • PCT/US1995006938
    • 1995-06-02
    • IDAHO RESEARCH FOUNDATION, INC.
    • IDAHO RESEARCH FOUNDATION, INC.WAI, ChienSMART, NeilLIN, Yuehe
    • B01D11/04
    • G21F9/125B01D11/0203B01D11/0288B01D11/0403B01D11/0407B01D11/0492B08B7/0021B09C1/02C01F17/0006C22B3/0021C22B3/0024C22B3/0068C22B3/1641Y02P10/234Y02P20/544Y10S210/912
    • A method for extracting metalloid and metal species from a solid or liquid material by exposing the material to a fluid solvent, particularly supercritical carbon dioxide, containing a chelating agent is described. The chelating agent forms chelates that are soluble in the fluid to allow removal of the species from the material. In preferred embodiments, the extraction solvent is supercritical carbon dioxide and the chelating agent comprises a trialkyl phosphate, a triaryl phosphate, an alkyl-aryl phosphate, a trialkylphosphine oxide, a triarylphosphine oxide, an alkyl-arylphosphine oxide, and mixtures thereof. The method provides an environmentally benign process for removing contaminants from industrial waste. The method is particularly useful for extracting actinides from acidic solutions, and the process can be aided by the addition of salts, such as nitrate salts, and modifiers, such as water and the lower alkyl alcohols and esters. The chelate and supercritical fluid can be regenerated, and the contaminant species recovered, to provide an economic, efficient process.
    • 描述了通过将材料暴露于含有螯合剂的流体溶剂,特别是超临界二氧化碳,从固体或液体材料中提取准金属和金属物质的方法。 螯合剂形成可溶于流体中的螯合物,以允许物质从材料中除去。 在优选的实施方案中,提取溶剂是超临界二氧化碳,螯合剂包括磷酸三烷基酯,磷酸三芳基酯,磷酸烷基酯,三烷基氧化膦,三芳基氧化膦,烷基 - 芳基氧化膦及其混合物。 该方法为从工业废物中除去污染物提供了环境友好的过程。 该方法特别可用于从酸性溶液中提取锕系元素,并且可以通过加入盐例如硝酸盐和改性剂如水和低级烷基醇和酯来帮助该方法。 可以再生螯合物和超临界流体,回收污染物质,以提供经济,有效的方法。