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    Regeneration of cupric etchants and recovery of copper sulfate
    47.
    发明授权
    Regeneration of cupric etchants and recovery of copper sulfate 失效
    铜蚀刻剂的再生和硫酸铜的回收

    公开(公告)号：US07175819B2

    公开(公告)日：2007-02-13

    申请号：US11071108

    申请日：2005-03-04

    申请人： Gang Zhao ,  H. Wayne Richardson

    发明人： Gang Zhao ,  H. Wayne Richardson

    IPC分类号： C01B7/01 ,  C01B7/03 ,  C01B17/96 ,  C01G3/00

    CPC分类号： C01G3/10 ,  B01D3/34 ,  C01B7/0712 ,  C01B17/901

    摘要： Spent, acidic solutions comprising cupric chloride and hyrdrochloric acid from the copper etching process are regenerated by a process in which the acid is subjected to distillation with sulfuric acid. In one embodiment, the process comprises (a) providing a spent etchant comprising at least about 10% by weight chloride and at least about 5% dissolved copper; (b) adding at least about 2 moles of sulfuric acid per mole of dissolved copper to the spent etching solution, thereby converting copper chloride into hydrochloric acid and precipitated copper sulfate; (c) distilling the mixture from step (b) to vaporize at least a portion of the hydrochloric acid; (d) condensing at least a portion of the vaporized hydrochloric acid; (e) separating at least a portion of the precipitated copper sulfate from the residual liquid, wherein said residual liquid comprises sulfuric acid; and (f) reusing at least a portion of the residual liquid as a sulfuric acid source in step (b).

    摘要翻译： 由铜蚀刻工艺中的包含氯化铜和二氯氯酸的废酸性溶液通过其中酸用硫酸蒸馏的方法再生。 在一个实施方案中，该方法包括（a）提供包含至少约10重量％氯化物和至少约5重量％溶解的铜的废蚀刻剂; （b）向废蚀刻溶液中加入至少约2摩尔硫酸/溶解的铜，从而将氯化铜转化为盐酸并沉淀出硫酸铜; （c）蒸馏步骤（b）的混合物以蒸发至少一部分盐酸; （d）冷凝至少一部分蒸发的盐酸; （e）从残余液体中分离出至少一部分沉淀的硫酸铜，其中所述残留液体包含硫酸; 和（f）在步骤（b）中重新使用至少一部分残留液体作为硫酸源。

    Liquid hydrate regeneration of contaminated acids
    48.
    发明授权
    Liquid hydrate regeneration of contaminated acids 失效
    污染酸液体水合物再生

    公开(公告)号：US06451269B1

    公开(公告)日：2002-09-17

    申请号：US09618640

    申请日：2000-07-18

    申请人： Lawrence D. Conant

    发明人： Lawrence D. Conant

    IPC分类号： B01D900

    CPC分类号： C01B17/901 ,  C01B21/46 ,  Y10S117/90 ,  Y10T117/10

    摘要： A process and apparatus for the regeneration of contaminated acid. The process involves cooling the contaminated acid to a lower temperature sufficient to form at least one liquid hydrate of the acid without forming a solid hydrate of the acid, maintaining the contaminated acid at the lower temperature for a time sufficient to form at least one liquid hydrate of the acid and precipitate an amount of the contaminants, separating the precipitated contaminants from the cooled acid, and warming the acid to decompose the liquid hydrate.

    摘要翻译： 一种污染酸再生的方法和装置。 该方法包括将受污染的酸冷却至足以形成酸的至少一种液体水合物的较低温度，而不形成酸的固体水合物，将污染的酸保持在较低温度下足以形成至少一种液体水合物 的酸，并沉淀出一定量的污染物，将沉淀的污染物与冷却的酸分离，并加热酸分解液体水合物。

    Liquid hydrate regeneration of contaminated acids
    49.
    发明授权
    Liquid hydrate regeneration of contaminated acids 失效

    公开(公告)号：US6106795A

    公开(公告)日：2000-08-22

    申请号：US790512

    申请日：1997-01-29

    申请人： Lawrence D. Conant

    发明人： Lawrence D. Conant

    IPC分类号： C01B17/90 ,  C01B21/46

    CPC分类号： C01B17/901 ,  C01B21/46 ,  Y10S117/90 ,  Y10T117/10

    摘要： A process and apparatus for the regeneration of contaminated acid. The process involves cooling the contaminated acid to a lower temperature sufficient to form at least one liquid hydrate of the acid without forming a solid hydrate of the acid, maintaining the contaminated acid at the lower temperature for a time sufficient to form at least one liquid hydrate of the acid and precipitate an amount of the contaminants, separating the precipitated contaminants from the cooled acid, and warming the acid to decompose the liquid hydrate.

    Liquid medium extraction purification method
    50.
    发明授权
    Liquid medium extraction purification method 失效
    液体培养基提取纯化方法

    公开(公告)号：US5989508A

    公开(公告)日：1999-11-23

    申请号：US981469

    申请日：1998-02-05

    申请人： Mohamed Takhim

    发明人： Mohamed Takhim

    IPC分类号： C02F1/26 ,  B01D3/38 ,  B01D11/04 ,  C01B17/90 ,  C01B17/96 ,  C01B25/22 ,  C01B25/223 ,  C01B25/234 ,  C01F11/46 ,  C07B63/00 ,  C22B3/20 ,  C22B3/44 ,  C01B25/16

    CPC分类号： C22B3/20 ,  B01D3/38 ,  C01B17/901 ,  C01B17/96 ,  C01B25/223 ,  C01B25/234 ,  C22B3/44 ,  Y02P10/234

    摘要： Method of purification by extraction of at least one substance to be isolated from a liquid medium, comprising an addition to the latter of an organic compound, entrainable by a vapor, which has a molecule with an acidic-basic character in the Lewis sense due to at least one atom of N, O and/or S forming one or more active sites provided with a free electron pair, this pair or these pairs being in resonance with at least one other pair carried by the molecule, this addition being carried out in a quantity sufficient to give rise to a product of an equilibrium reaction between the organic compound and the said at least one substance to be isolated, and sufficient to cause a precipitation of this equilibrium reaction product, a filtration of the precipitate and an entrainment by vapor of the organic compound from the precipitate, with a yield of the substance to be isolated in purified form.

    摘要翻译： PCT No.PCT / BE96 / 00066 Sec。 371日期：1998年2月5日 102（e）1998年2月5日PCT PCT 1996年6月21日PCT公布。 出版物WO97 / 00714 日期1997年1月9日通过萃取从液体介质中分离出的至少一种物质进行纯化的方法，其包括向后者中加入可由蒸气夹带的有机化合物，所述有机化合物具有酸性碱性特征的分子 由于至少一个N，O和/或S的原子形成一个或多个具有自由电子对的活性位点的路易斯感，该对或这些对与分子携带的至少一个其它对共振，这一点 加入量足以产生有机化合物与所述至少一种待分离物质之间的平衡反应的产物，并且足以引起该平衡反应产物的沉淀，过滤沉淀物 以及来自沉淀物的有机化合物的蒸气夹带，以纯化形式分离的物质的产率。