Patents Assigned to Metaleurop S.A.
  • Patent number: 6267923
    Abstract: A lead alloy for battery grids is disclosed. The lead alloy contains calcium with a relative concentration by weight of between 0.05% and 0.12%; tin with a relative concentration by weight of less than 3%; aluminum with a relative concentration by weight of between 0.002% and 0.04%; and barium comprising a relative concentration by weight of less than 0.02%.
    Type: Grant
    Filed: November 23, 1998
    Date of Patent: July 31, 2001
    Assignee: Metaleurop S.A.
    Inventors: Luc Albert, Alain Goguelin, Jean-Louis Caillerie
  • Patent number: 5496462
    Abstract: The invention relates to a process for obtaining a fine powder of dendritic cadmium, characterized in that it comprises the following steps:(a) electrolytic production of cadmium metal on an electrode, under conditions such that there is formed a sponge consisting of tangled polymorphic dendrites,(b) removal and washing of the sponge,(c) disintegration of the sponge in a pulpy medium under conditions such that the dendrites are released in order to obtain a dendritic powder of particle size essentially less than a specified limit.
    Type: Grant
    Filed: February 10, 1994
    Date of Patent: March 5, 1996
    Assignee: Metaleurop S.A.
    Inventor: Luc Albert
  • Patent number: 5467365
    Abstract: An electric furnace (containing an immersed electrode) and a process for the recovery of lead, arising especially from solid residues. Fines, which are a product of physically crushing spent batteries, are melted under not very reducing conditions in the presence of a small amount of carbon. This melting allows separating the crude lead and the lead-rich slag so as to remove sulphur in the form of sulphur dioxide and to optionally recover the crude lead. The lead-rich slag is then reduced with a suitable amount of carbon so as to separate the lead-free slag and the crude lead, which again can recovered.
    Type: Grant
    Filed: September 9, 1993
    Date of Patent: November 14, 1995
    Assignee: Metaleurop S.A.
    Inventors: Benoit Bied-Charreton, Pierre Chabry, Jacques Lecadet, Patrice Pasquier
  • Patent number: 5391792
    Abstract: The present invention is a germanium compound having the following general formula I: ##STR1## in which n is a positive integer less than 50 when the general formula is linear and is between 3 and 50 when the general formula is cyclic, and preferably between 3 and 6, and the R radicals, which are identical or different, are chosen independently from hydrocarbyl radicals, or, the R radicals form a hydrocarbon chain optionally containing one or two heteroatoms, optionally substituted by one or more C.sub.1 -C.sub.3 alkyl radicals, which are optionally unsaturated, the compound of general formula I being, when it is linear, terminated by two radicals R.sub.3 Ge-- and R.sub.3 Ge--O-- respectively, provided that the different R radicals cannot simultaneously correspond to a methyl radical and when the general formula I is cyclic, the two radicals attach to the same germanium atom, cannot correspond to a divalent chain of the formula: ##STR2## Z.sub.1 and Z.sub.2 being chosen from methyl radicals or hydrogen atoms.
    Type: Grant
    Filed: January 31, 1994
    Date of Patent: February 21, 1995
    Assignee: Metaleurop S.A.
    Inventors: Christian Thomas, Paolo Fossi, Elisabeth Perrier, Pierre Mazerolles
  • Patent number: 5296204
    Abstract: The invention relates to a process for extracting thallium present especially in aqueous wastes of industrial origin.The process, which makes it possible to extract and recover thallium from a solution which contains it in the form of a salt of a strong inorganic acid, comprises a stage of bringing the said solution into contact with an ion exchange resin containing a thiol group.This process exhibits good selectivity in relation to salts of metals or metalloids which are usually present in industrial aqueous wastes.
    Type: Grant
    Filed: July 27, 1992
    Date of Patent: March 22, 1994
    Assignee: Metaleurop S.A.
    Inventors: Luc Albert, Herve Masson
  • Patent number: 5264083
    Abstract: A distillation tray including a use with a distillation column tray and a heating chamber with each tray including a bottom pierced by a through hole and a rim surrounding the bottom and having at least one outside flank. The outside flank includes a plurality of relative projections regularly spaced apart along the rim and constituting undulations. The tray is applicable to metallurgy, and in particular to distilling metals such as zinc.
    Type: Grant
    Filed: May 7, 1991
    Date of Patent: November 23, 1993
    Assignees: Metaleurop S.A., Hepworth Refractories (Belgium) S.A.
    Inventors: Richard Kollar, Robert Maurage
  • Patent number: 5178334
    Abstract: A process to increase the content of germanium which is found in an iron hydroxide phase of an ore of the supergene type for later recovery by solvent extraction. The process comprises the steps of first crushing the ore, converting the ore to pulp, and then subjecting the pulp to a magnetic separation to give a magnetic fraction enriched in germanium. Also, the process can be used to increase the content of gallium which is found in a jarosite phase of an ore of the supergene type for later recovery by solvent extraction.
    Type: Grant
    Filed: March 9, 1992
    Date of Patent: January 12, 1993
    Assignee: Metaleurop S.A.
    Inventors: Patrick Hebert, Jean-Jacques Predali
  • Patent number: 5122241
    Abstract: A process of hydrometallurgical treatment of a solution of materials containing gallium and at least one metalloid from Group V of the periodic table of the elements which comprises adding hydrochloric acid and an alkali metal chloride or an alkaline earth metal chloride to said solution to form gallium chloride so that the concentration of chloride ions, not counting those bonded to gallium, is in a range of from 4 to 10 N and the acidity of said solution is in a range of from 1 to about 5 N. Then placing the adjusted solution in contact with an organic phase comprising at least one neutral pentavalent phosphorus compound having a phosphorus-oxygen double bond, wherein the gallium chloride is extracted by the organic phase and reextracting the gallium from the organic phase.
    Type: Grant
    Filed: July 24, 1989
    Date of Patent: June 16, 1992
    Assignee: Metaleurop S.A.
    Inventor: Yves Le Quesne
  • Patent number: 5019363
    Abstract: A process for the hydrometallurgical treatment of an indium chloride solution and at least one element selected from the group consisting of tin and antimony comprises the following steps: a) adjustment of the free chloride ion content by addition of alkaline or alkaline earth chloride or a mixture thereof and of their acidity by the addition of hydrochloric acid; b) bringing said indium chloride solution into contact with an organic phase containing dry trialkyl phosphate; c) extraction of said organic phase by bringing the latter into contact with a 0.1 to 3 N hydrochloric acid solution to obtain an indium chloride solution; d) basic extraction using an alkaline metal hydroxyde. Application to extractive metallurgy and recovery of indium and accompanying elements.
    Type: Grant
    Filed: July 19, 1989
    Date of Patent: May 28, 1991
    Assignee: Metaleurop S.A.
    Inventors: Yves Le Quesne, Paolo Fossi
  • Patent number: 4954322
    Abstract: The invention relates to a process for the recovery of metal values contained in a ferric gangue.The process comprises the following stages:(a) dissolution of the metal values from the ferric gangue with sulphuric acid;(b) recovery of the metal value or values by a method which is known per se,(c) evaporation of the acid ferric solution resulting from stage (b) so as to increase the acidity to a value of between about 50 and 100%,(d) crystallization from this solution, at a temperature of between -10 and 50.degree. C., of a hydrated iron sulphate of formula Fe.sub.2 (SO.sub.4).sub.3.9H.sub.2 O.Application to the recovery of strategic metals.
    Type: Grant
    Filed: July 27, 1989
    Date of Patent: September 4, 1990
    Assignee: Metaleurop S.A.
    Inventor: Jean-Michel DeMarthe