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328 条记录 (耗时 0.021 秒)

    Process for the extraction of zinc from sulphide concentrates
    83.
    发明授权
    Process for the extraction of zinc from sulphide concentrates 失效
    从硫化物浓缩物中提取锌的方法

    公开(公告)号：US5858315A

    公开(公告)日：1999-01-12

    申请号：US591660

    申请日：1996-04-24

    申请人： John W. Van Put ,  Francois M. I. G. Terwinghe ,  Thierry S. A. De Nys

    发明人： John W. Van Put ,  Francois M. I. G. Terwinghe ,  Thierry S. A. De Nys

    IPC分类号： C22B3/04 ,  C22B3/08 ,  C22B19/00 ,  C22B19/02 ,  C22B19/20 ,  C01G9/00

    CPC分类号： C22B19/20 ,  C22B19/02

    摘要： A portion of the concentrates is roasted and a portion of the resulting calcine is subjected to a neutral leaching step. Another portion of the concentrates is directly leached in an acidic medium in the presence of oxygen and under atmospheric conditions together with at least a portion of the neutral leaching residue. The zinc- and iron-rich solution resulting from acid leaching is neutralised with another portion of the calcine, the iron is removed and the solution is reused in the neutral leaching step. The method enables a gradual increase in the capacity of an existing zinc plant in accordance with demand, while capital costs may advantageously be spread out over time.

    摘要翻译： PCT No.PCT / EP94 / 02794 Sec。 371日期：1996年4月24日 102（e）日期1996年4月24日PCT 1994年8月24日PCT公布。 公开号WO95 / 06140 日期1995年3月2日将浓缩物的一部分焙烧，并将一部分所得的煅烧物进行中性浸出步骤。 浓缩物的另一部分在氧气存在下和酸性介质中直接浸出在大气条件下以及至少一部分中性浸出残渣。 由酸浸出产生的富含锌和铁的溶液被另一部分煅烧物中和，除去铁，并将溶液重新用于中性浸出步骤。 该方法能够根据需求逐渐增加现有锌厂的能力，同时资本成本可以有利地随着时间的推移而扩散。

    Chloride assisted hydrometallurgical copper extraction
    85.
    发明授权
    Chloride assisted hydrometallurgical copper extraction 失效
    氯化物辅助湿法冶金铜提取

    公开(公告)号：US5431788A

    公开(公告)日：1995-07-11

    申请号：US098874

    申请日：1993-07-29

    申请人： David L. Jones

    发明人： David L. Jones

    IPC分类号： C22B3/04 ,  B01D11/00 ,  B01D11/04 ,  B01D61/44 ,  C22B20060101 ,  C22B3/06 ,  C22B3/08 ,  C22B3/10 ,  C22B3/18 ,  C22B3/20 ,  C22B3/24 ,  C22B3/26 ,  C22B3/38 ,  C22B15/00 ,  C22B19/00 ,  C22B19/20 ,  C22B23/00 ,  C22B26/20

    CPC分类号： C22B3/0005 ,  C22B15/0069 ,  C22B15/0071 ,  C22B15/0084 ,  C22B19/22 ,  C22B19/26 ,  C22B23/0415 ,  C22B23/0423 ,  C22B23/043 ,  C22B23/0453 ,  C22B3/08 ,  C22B3/10 ,  C22B3/20 ,  Y02P10/234 ,  Y02P10/236

    摘要： A process for the extraction of copper from a sulphide copper ore or concentrate comprises subjecting the ore or concentrate to a first leaching at an elevated temperature and pressure in the presence of oxygen and a lixiviant which comprises an acidic solution of chloride and bisulphate or sulphate ions to produce an insoluble basic copper sulphate. The basic copper sulphate so produced is leached in a second leaching preferably at atmospheric pressure with an acidic sulphate solution to dissolve the basic copper salt to produce a leach liquor containing copper sulphate in solution. The resulting leach liquor is subjected to solvent extraction to produce a copper concentrate solution and a raffinate comprising protons and bisulphate or sulphate ions in solution. Protons, and bisulphate or sulphate ions are extracted from the raffinate to produce a sulphuric acid solution which sulphuric acid solution is then recycled to the first leaching at elevated pressure and temperature to serve as a source of bisulphate or sulphate ions in the lixiviant. According to a preferred embodiment, the extraction of the protons and bisulphate or sulphate ions from the raffinate is effected by means of an electrodialysis process. In alternative embodiments copper sulphate is also extracted from the raffinate and recycled to the first leaching step or alternatively a source of bisulphate or sulphate ions, such as a hydrolyzable metal sulphate, is introduced from another source.

    摘要翻译： 从硫化铜矿石或浓缩物中提取铜的方法包括使矿石或浓缩物在升高的温度和压力下在氧气和浸液的存在下进行第一次浸出，该浸出物包含氯化物和硫酸氢盐或硫酸根离子的酸性溶液 以产生不溶性碱性硫酸铜。 如此生产的碱性硫酸铜在第二次浸出中优选在大气压下用酸性硫酸盐溶液浸出以溶解碱性铜盐以产生溶液中含有硫酸铜的浸出液。 将所得浸出液进行溶剂萃取以产生铜浓缩液和在溶液中含有质子和硫酸氢盐或硫酸根离子的萃余液。 从萃余液中提取质子和硫酸氢盐或硫酸根离子以产生硫酸溶液，然后将硫酸溶液在升高的压力和温度下再循环至第一次浸出，以作为浸取液中硫酸盐或硫酸根离子的来源。 根据优选的实施方案，通过电渗析方法从提余液中萃取质子和硫酸氢盐或硫酸根离子。 在替代实施方案中，硫酸铜也从萃余液中提取并再循环至第一浸出步骤，或者另外从另一来源引入硫酸氢根离子源，例如可水解金属硫酸盐。

    Bis-bibenzimidazole composition
    86.
    发明授权
    Bis-bibenzimidazole composition 失效
    双联苯并咪唑组合物

    公开(公告)号：US5258524A

    公开(公告)日：1993-11-02

    申请号：US843405

    申请日：1992-02-28

    申请人： Peter M. Quan ,  Derek Thorp ,  Raymond F. Dalton

    发明人： Peter M. Quan ,  Derek Thorp ,  Raymond F. Dalton

    IPC分类号： B01D11/04 ,  C07C13/00 ,  C07D235/20 ,  C07D487/14 ,  C07D487/16 ,  C22B3/20 ,  C22B3/26 ,  C22B3/36 ,  C22B19/00 ,  C07D233/54

    CPC分类号： C07D487/14 ,  C07D235/20 ,  C22B3/0036 ,  Y02P10/234 ,  Y10S423/14

    摘要： A composition of bibenzimidazoles of the Formula (I): ##STR1## wherein X & Y which may be the same or different and, taken together, contain a total of from 12 to 52 saturated carbon atoms, are (a) each selected from --R, --COR, --CH.sub.2 COOR, --CH(COOR).sub.2 and --COOR; or (b) together form a group selected from ##STR2## wherein R is an optionally substituted hydrocarbyl group,A & B taken together with the two carbon atoms to which they are linked form an optionally substituted benzene ring; andC & D taken together with the two carbon atoms to which they are linked form an optionally substituted benzene ring;characterised in that at least 50% by weight of the bibenzimidazoles in the composition are of Formula (II) ##STR3## wherein X and Y are as hereinbefore defined;T, U, V & W which may be the same or different, are H, R.sup.1 or OR.sup.1 provided at least one of T, U, V & W is R.sup.1 or OR.sup.1 ;and R.sup.1 is C.sub.1-6 -alkyl;which are suitable for use in the extraction of zinc from aqueous solutions of zinc in the presence of other metals.

    Process for recovering zinc from zinc ferrite material
    90.
    发明授权
    Process for recovering zinc from zinc ferrite material 失效
    锌铁氧体材料回收锌的工艺

    公开(公告)号：US4510028A

    公开(公告)日：1985-04-09

    申请号：US508693

    申请日：1983-06-28

    申请人： Gerald L. Bolton ,  Donald R. Weir

    发明人： Gerald L. Bolton ,  Donald R. Weir

    IPC分类号： C22B19/00 ,  C22B20060101 ,  C22B19/20 ,  C22B19/22

    CPC分类号： C22B19/22 ,  Y02P10/234

    摘要： A process for recovering zinc from material containing zinc ferrite includes leaching the ferrite containing material together with zinc sulphide containing material in a leach step, with the relative amounts of ferrite material and zinc sulphide material being such that the zinc present as zinc ferrite is a minor proportion of the total zinc content of the ferrite material and the zinc sulphide material. The leach step is carried out in aqueous sulphuric acid solution at elevated pressure under oxidizing conditions and at a temperature above the melting point of sulphur, with the sulphuric acid to zinc molar ratio being less than about 1.2:1, to cause dissolution of a substantial amount of zinc from the ferrite material and from the sulphide material.

    摘要翻译： 从含有锌铁氧体的材料中回收锌的方法包括在浸出步骤中将含铁素体的材料与含硫化锌的材料一起浸出，铁氧体材料和硫化锌材料的相对量使锌铁氧体存在的锌是次要的 铁素体材料和硫化锌材料的总锌含量的比例。 浸出步骤在硫酸水溶液中在氧化条件下和高于硫的熔点的温度下进行，硫酸与锌的摩尔比小于约1.2:1，导致大量 来自铁氧体材料和来自硫化物材料的锌的量。