PROCEDE DE TRAITEMENT D'UN SOLIDE AMIANTE
    71.
    发明公开
    PROCEDE DE TRAITEMENT D'UN SOLIDE AMIANTE 有权
    方法石棉物质的治疗

    公开(公告)号:EP2285455A2

    公开(公告)日:2011-02-23

    申请号:EP09750046.6

    申请日:2009-05-06

    IPC分类号: A62D3/36

    摘要: The invention relates to a method for treating an asbestos solid (1), said method comprising at least one hot acid treatment step (4) for treating the asbestos (3) of the asbestos solid (1) at atmospheric pressure with an aqueous solution (5) of hydrochloric acid at a temperature close to the boiling temperature of the aqueous solution (5) of hydrochloric acid, in such a way as to obtain a so-called non-silicic solution (8) of at least one non-silicic constituent of the asbestos (3) in the aqueous solution (5) of hydrochloric acid and a so-called silicic solid (9). Said method is characterised in that the non-silicic solution (8) is subjected to a so-called precipitation treatment (13), wherein a selective precipitation (13) of the cationic species of iron present in said non-silicic solution (8) is carried out.

    ELIMINATION OF CYANIDES IN THE DEHALOGENATION OF HALOFLUOROCARBONS
    77.
    发明公开
    ELIMINATION OF CYANIDES IN THE DEHALOGENATION OF HALOFLUOROCARBONS 失效
    ENTFERNUNG VON CYANIDEN BEI DER DEHALOGENIERUNG VON HALOFLUORKOHLENWASSERSTOFFEN

    公开(公告)号:EP0799079A4

    公开(公告)日:1998-03-18

    申请号:EP95944504

    申请日:1995-12-19

    申请人: COMMODORE LAB INC

    摘要: Ozone depleting fluorocarbon compounds (18) are dehalogenated through more economic reduction reaction with solvated electrons formed from lower equivalents of reactive metals (14) than previously used by reacting the partial reduction products with nitrogen-containing bases, such as ammonia (12) or alternatively, without any reactive metal by reacting with the base alone. Mixtures of fluorocarbon refrigerants including difficult-to-separate azeotropes of dichlorodifluoromethane contaminated with clorodifluoromethane are reclaimed by treating only with weak non-aqueous nitrogen-containing bases to provide essentially chemically pure dichlorodifluoromethanerefrigerant suitable for recycling/reuse. Hazardous cyanides which may develop are converted to relatively benign products during the process by introducing a base (22) to convert volatile cyanides to more stable salts which in turn are converted to useful compounds of lesser toxicity.

    摘要翻译: 消耗臭氧的碳氟化合物通过更多的经济还原反应被脱卤反应,与由反应性金属的较低当量形成的溶剂化电子比先前通过使部分还原产物与含氮碱(例如氨)反应所使用,或者通过与 单独的基地。 包括难以分离被二氯二氟甲烷污染的氯代二氟甲烷共沸物的氟碳制冷剂的混合物只能用弱的非水性含氮碱处理,以提供基本上化学纯的二氯二氟甲烷制冷剂,适用于再循环/再利用。 通过引入碱将挥发性氰化物转化为更稳定的盐,而这些盐转化成毒性较小的有用化合物,可能会在生产过程中将有害的氰化物转化成相对良性的产物。

    METHOD OF DECOMPOSING HALOGENATED AROMATIC COMPOUND.
    79.
    发明公开
    METHOD OF DECOMPOSING HALOGENATED AROMATIC COMPOUND. 失效
    VERFAHREN ZUM ABBAU EINER HALOGENIERTEN AROMATISCHEN VERBINDUNG。

    公开(公告)号:EP0657189A4

    公开(公告)日:1995-08-23

    申请号:EP94918552

    申请日:1994-06-23

    CPC分类号: A62D3/36 A62D2101/22

    摘要: A method of decomposing halogenated aromatic compounds safely without fail, which comprises bringing a solution of a halogenated aromatic compound in a hot-alkali-resistant polar solvent into contact with an alkaline substance at about 100 to about 300 DEG C to decompose the aromatic compound and removing the salt and alkaline substance precipitated in the solvent to recycle the used solvent.

    摘要翻译: 一种安全可靠地分解卤代芳香族化合物的方法,其包括使卤代芳香族化合物在耐热碱性极性溶剂中的溶液与碱性物质在约100〜约300℃下接触,分解芳香族化合物, 除去在溶剂中沉淀的盐和碱性物质以循环使用的溶剂。