Low lead release plumbing components made of copper based alloys containing lead, and a method for obtaining the same
    1.
    发明授权
    Low lead release plumbing components made of copper based alloys containing lead, and a method for obtaining the same 有权
    含有铅的铜基合金制造的低铅释放管道部件及其制造方法

    公开(公告)号:US06770215B2

    公开(公告)日:2004-08-03

    申请号:US10195992

    申请日:2002-07-16

    申请人: Aldo Giusti

    发明人: Aldo Giusti

    IPC分类号: B44C122

    CPC分类号: C23F1/00 C22C9/04

    摘要: Lead brass components for potable water distribution circuits (e.g., plumbing components made of CuZn39Pb3, containing 3% Pb), also chronium plated ones, are subjected to a lead-selective surface etching to reduce, in operation, the release of Pb caused by Pb surface “smearing”, resulting either from machining or molding; said elements are firstly contacted by an aqueous solution of an acid capable of forming soluble Pb salts, preferably a non-oxidizing solution, by simply dipping the components in the solution, e.g., a solution of 0.1 M sulfamic acid, at 20°-50° C. for 10 to 50 minutes, and, subsequently, the elements are passivated by immersion into a strong base aqueous solution, e.g., a solution of 0.1 M NaOH at 20°-25° C., for approximately 10 minutes; in this manner, plumbing components made of a copper based alloy containing Pb are obtained, which components, after 15 days of test according to US NSF STD61 procedure, release Pb in an amount less than 0.025 &mgr;g for each ml of the internal volume of the component delimited by metallic walls remained in contact with water during the testing period.

    摘要翻译: 用于饮用水分配回路的铅黄铜组件(例如,含有3%Pb的CuZn39Pb3制成的管道组件)也是经过镀锡的铅进行铅选择性表面蚀刻,以在操作中减少由Pb引起的Pb的释放 表面“涂抹”,由加工或成型得到; 所述元素首先通过简单地将组分浸入溶液中,例如0.1M氨基磺酸的溶液在20°-50℃下,由能够形成可溶性Pb盐,优选非氧化性溶液的酸的水溶液接触 ℃下浸泡10至50分钟,然后将元素浸入强碱性水溶液中,例如在20°-25℃下加入0.1M NaOH溶液约10分钟; 以这种方式,获得由含有Pb的铜基合金制成的管道部件,根据美国NSF STD61程序测试15天后,该组分以每ml的内部体积的百万分之一的量释放小于0.025杯的Pb 在测试期间,由金属墙界定的部件与水保持接触。

    Low lead release plumbing components made of copper based alloys containing lead, and a method for obtaining the same

    公开(公告)号:US06461534B2

    公开(公告)日:2002-10-08

    申请号:US09845439

    申请日:2001-04-30

    申请人: Aldo Giusti

    发明人: Aldo Giusti

    IPC分类号: C09K1300

    CPC分类号: C23F1/00 C22C9/04

    摘要: Lead brass components for potable water distribution circuits (e.g., plumbing components made of CuZn39Pb3, containing 3% Pb), also chronium plated ones, are subjected to a lead-selective surface etching to reduce, in operation, the release of Pb caused by Pb surface “smearing”, resulting either from machining or molding; said elements are firstly contacted by an aqueous solution of an acid capable of forming soluble Pb salts, preferably a non-oxidizing solution, by simply dipping the components in the solution, e.g., a solution of 0.1 M sulfamic acid, at 20°−50° C. for 10 to 50 minutes, and, subsequently, the elements are passivated by immersion into a strong base aqueous solution, e.g., a solution of 0.1 M NaOH at 20°−25° C., for approximately 10 minutes; in this manner, plumbing components made of a copper based alloy containing Pb are obtained, which components, after 15 days of test according to US NSF STD61 procedure, release Pb in an amount less than 0.025 &mgr;g for each ml of the internal volume of the component delimited by metallic walls remained in contact with water during the testing period.

    Dehydroisomerisation catalyst and its use in the preparation of
isobutene from N-butane
    5.
    发明授权
    Dehydroisomerisation catalyst and its use in the preparation of isobutene from N-butane 失效
    脱氢异构化催化剂及其在N-丁烷制备异丁烯中的应用

    公开(公告)号:US5336830A

    公开(公告)日:1994-08-09

    申请号:US140572

    申请日:1993-10-21

    CPC分类号: B01J23/42 C07C5/373

    摘要: A catalyst is described for the preparation of isobutene by dehydroisomerization of n-butane consisting of a solid, granular support of porous gamma-alumina on the surface of which catalytic quantities of platinum, silica and preferably also one or more promotors are deposited. In a preferred form of embodiment this catalyst is used with a second catalyst which may be formed of Boralite B or a solid granular support of gamma-alumina on the surface of which catalytic quantities of silica are deposited. The present invention relates also to the process of dehydroisomerization of n-butane to isobutene in which the catalyst is used and the relative operating conditions.

    摘要翻译: 描述了一种催化剂,用于通过由多孔γ-氧化铝的固体粒状载体组成的正丁烷的脱氢异构化来制备异丁烯,其表面上催化量的铂,二氧化硅,并且优选还含有一种或多种促进剂。 在一个优选形式的实施方案中,该催化剂与第二催化剂一起使用,该第二催化剂可由Boreite B或γ-氧化铝的固体颗粒载体形成,其表面上沉积有催化量的二氧化硅。 本发明还涉及正丁烷与使用催化剂的异丁烯的脱氢异构化方法和相对操作条件。

    Low lead release plumbing components made of copper based alloys containing lead, and a method for obtaining the same
    7.
    发明授权
    Low lead release plumbing components made of copper based alloys containing lead, and a method for obtaining the same 失效
    含有铅的铜基合金制造的低铅释放管道部件及其制造方法

    公开(公告)号:US06270590B1

    公开(公告)日:2001-08-07

    申请号:US08875881

    申请日:1997-11-19

    申请人: Aldo Giusti

    发明人: Aldo Giusti

    IPC分类号: C23C806

    摘要: A method for treating a component made of a copper-based alloy containing lead. The component has Pb and Pb salts on a surface thereof. The method includes the step of etching the surface of the component selectively to remove almost entirely the Pb and Pb salts from the surface. The etching includes treating the surface with an acidic aqueous solution that is a) a non-oxidizing acidic aqueous solution of an acid capable of forming soluble Pb salts or b) an oxidizing acidic aqueous solution of an organic acid mixed with peroxide. The method also includes the step of passivating the etched surface whereby to inhibit release of any Pb or Pb salts remaining in the component when the passivated surface is in contact with water.

    摘要翻译: 一种处理由含铅的铜基合金制成的部件的方法。 该组分在其表面上具有Pb和Pb盐。 该方法包括选择性地蚀刻该组分的表面以从表面几乎完全去除Pb和Pb盐的步骤。 蚀刻包括用酸性水溶液处理表面,酸性水溶液是a)能够形成可溶性Pb盐的酸的非氧化性酸性水溶液,或b)与过氧化物混合的有机酸的氧化性酸性水溶液。 该方法还包括钝化蚀刻表面的步骤,从而当钝化表面与水接触时,抑制残留在组分中的任何Pb或Pb盐的释放。

    Dehydroisomerization catalyst and its use in the preparation of
isobutene from n-butane
    8.
    发明授权
    Dehydroisomerization catalyst and its use in the preparation of isobutene from n-butane 失效
    脱氢异构催化剂及其在正丁烷制备异丁烯中的应用

    公开(公告)号:US5275995A

    公开(公告)日:1994-01-04

    申请号:US737067

    申请日:1991-07-29

    CPC分类号: B01J23/42 C07C5/373

    摘要: A catalyst is described for the preparation of isobutene by dehydroisomerization of n-butane consisting of a solid, granular support of porous gamma-alumina on the surface of which catalytic quantities of platinum, silica and preferably also one or more promotors are deposited. In a preferred form of embodiment this catalyst is used with a second catalyst which may be formed of Boralite B or a solid granular support gamma-alumina on the surface of which catalytic quantities of silica are deposited.The present invention relates also to the process of dehydroisomerization of n-butane to isobutene in which the catalyst is used and the relative operating conditions.

    摘要翻译: 描述了一种催化剂,用于通过由多孔γ-氧化铝的固体粒状载体组成的正丁烷的脱氢异构化来制备异丁烯,其表面上催化量的铂,二氧化硅,并且优选还含有一种或多种促进剂。 在优选的实施方案中,该催化剂与第二催化剂一起使用,第二催化剂可以由Boreite B或其表面上沉积有催化量的二氧化硅的固体颗粒载体γ-氧化铝形成。 本发明还涉及使用催化剂的正丁烷与异丁烯的脱氢异构化方法和相对的操作条件。