公开(公告)号：US08409421B2

公开(公告)日：2013-04-02

申请号：US12745067

申请日：2008-11-27

Applicant: Massimo Maccagni ,  Silvano Cossali ,  Carmelita Roncaldier ,  Carlo Olper ,  Luigi Olper ,  Alessandro Olper

Inventor： Marco Olper ,  Massimo Maccagni ,  Silvano Cossali

IPC: C25C1/18

CPC classification number: C22B13/045 ,  C22B7/008 ,  C25C1/18 ,  Y02P10/122 ,  Y02P10/234

Abstract: The present invention relates to an electrolytic process for producing metallic lead starting from desulfurized lead pastel comprising the following operative phases: a) leaching the desulfurized pastel by putting it in contact with a solution comprising ammonium chloride, with the formation of a leach liquor and evolution of gaseous CO2; b) separating a first solid residue and a first clarified leach liquor from the leach liquor coming from phase a); c) leaching the solid residue separated in phase b) by putting it in contact with a solution comprising ammonium chloride and hydrogen peroxide; d) separating a second solid residue and a second clarified leach liquor from the leach liquor coming from phase c); e) joining the first clarified leach liquor coming from phase b) with the second clarified leach liquor coming from phase d) and forming a single solution; f) subjecting the solution leaving phase e) to electrolysis in a flow cell, with a current density ranging from 50 to 10,000 A/m2, said electrolysis resulting in the formation of a lead sponge. The present invention also relates to the relative desulfurization process of the pastel.

Abstract translation: 本发明涉及一种用于从脱硫铅膏制备金属铅的电解方法，其包括以下操作阶段：a）通过将脱硫粉末与包含氯化铵的溶液接触，浸出脱硫粉末，形成浸出液并进行 的气态二氧化碳; b）从第一阶段a）的浸出液中分离出第一固体残余物和第一澄清浸出液; c）通过使其与包含氯化铵和过氧化氢的溶液接触来浸出在相b）中分离的固体残余物; d）从相c）的浸出液中分离出第二固体残渣和第二澄清浸出液; e）将来自相b）的第一澄清浸出液与来自相d）的第二澄清浸出液接合并形成单一溶液; f）使离开相e）的溶液在流动池中电解，电流密度范围为50至10,000A / m 2，所述电解导致形成铅海绵。 本发明还涉及到粉笔的相对脱硫工艺。

公开(公告)号：US20110083970A1

公开(公告)日：2011-04-14

申请号：US12745067

申请日：2008-11-27

Applicant: Marco Olper ,  Carmelita Roncaldier ,  Carlo Olper ,  Luigi Olper ,  Alessandro Olper ,  Massimo Maccagni ,  Silvano Cossali

Inventor： Marco Olper ,  Carmelita Roncaldier ,  Carlo Olper ,  Luigi Olper ,  Alessandro Olper ,  Massimo Maccagni ,  Silvano Cossali

IPC: C25C1/18 ,  C22B13/00

CPC classification number: C22B13/045 ,  C22B7/008 ,  C25C1/18 ,  Y02P10/122 ,  Y02P10/234

Abstract: The present invention relates to an electrolytic process for producing metallic lead starting from desulfurized lead pastel comprising the following operative phases: a) leaching the desulfurized pastel by putting it in contact with a solution comprising ammonium chloride, with the formation of a leach liquor and evolution of gaseous CO2; b) separating a first solid residue and a first clarified leach liquor from the leach liquor coming from phase a); c) leaching the solid residue separated in phase b) by putting it in contact with a solution comprising ammonium chloride and hydrogen peroxide; d) separating a second solid residue and a second clarified leach liquor from the leach liquor coming from phase c); e) joining the first clarified leach liquor coming from phase b) with the second clarified leach liquor coming from phase d) and forming a single solution; f) subjecting the solution leaving phase e) to electrolysis in a flow cell, with a current density ranging from 50 to 10,000 A/m2, said electrolysis resulting in the formation of a lead sponge. The present invention also relates to the relative desulfurization process of the pastel.

Abstract translation: 本发明涉及一种用于从脱硫铅膏制备金属铅的电解方法，其包括以下操作阶段：a）通过将脱硫粉末与包含氯化铵的溶液接触，浸出脱硫粉末，形成浸出液并进行 的气态二氧化碳; b）从第一阶段a）的浸出液中分离出第一固体残余物和第一澄清浸出液; c）通过使其与包含氯化铵和过氧化氢的溶液接触来浸出在相b）中分离的固体残余物; d）从相c）的浸出液中分离出第二固体残渣和第二澄清浸出液; e）将来自相b）的第一澄清浸出液与来自相d）的第二澄清浸出液接合并形成单一溶液; f）使离开相e）的溶液在流动池中电解，电流密度范围为50至10,000A / m 2，所述电解导致形成铅海绵。 本发明还涉及到粉笔的相对脱硫工艺。