Patents Assigned to Millbrook Lead Recycling Technologies Limited
  • Publication number: 20120186397
    Abstract: An all-wet process for reclaiming the lead content of impure electrode paste or slime from discarded lead batteries and/or lead minerals, in form of high purity lead compound, comprises a) suspending the impure lead containing material in a lead sulphate dissolving aqueous solution of a salt belonging to the group composed of the acetates of sodium, potassium and ammonium; b) adding to the suspension sulphuric acid in an amount sufficient to convert all lead oxides to lead sulphate soluble in the acetate salt solution and slowly adding to the suspension either hydrogen peroxide or a sulphite or bubbling sulphurous anhydride through it, in a measure adapted to reduce any lead dioxide to lead oxide converted eventually to soluble lead sulphate by the sulphuric acid; c) separating a limpid acetate salt solution containing dissolved lead sulphate from a solid phase residue including all undissolved compounds and impurities; d) adding to the separated solution of lead sulphate either carbonate or hydroxide of the
    Type: Application
    Filed: July 30, 2009
    Publication date: July 26, 2012
    Applicant: Millbrook Lead Recycling Technologies Limited
    Inventor: Federica Martini
  • Patent number: 8147780
    Abstract: Wet process of low environmental impact recovers the lead content of an electrode slime and/or of lead minerals in the valuable form of high purity-lead carbonates that are convertible to highly pure lead oxide by heat treatment in oven at relatively low temperature, perfectly suited for making active electrode pastes of new batteries or other uses.
    Type: Grant
    Filed: January 15, 2008
    Date of Patent: April 3, 2012
    Assignee: Millbrook Lead Recycling Technologies Limited
    Inventor: Federica Martini
  • Patent number: 7998440
    Abstract: An outstandingly low environmental impact wet process recovers the lead content of an electrode slime and/or of lead minerals in the valuable form of high purity lead oxide or compound convertible to highly pure lead oxide by heat treatment in oven at relatively low temperature, perfectly suited for making active electrode pastes of new batteries or other uses.
    Type: Grant
    Filed: November 3, 2009
    Date of Patent: August 16, 2011
    Assignee: Millbrook Lead Recycling Technologies Limited
    Inventor: Federica Martini
  • Patent number: 7772452
    Abstract: A process for recovery of the silica present in the separators located between the elements of lead-acid batteries characterized in that it comprises the following operations: a) washing the heavy plastics to remove the lead compounds and other foreign bodies, b) separating the plastics from the washing solution, c) lead recovery and regeneration of the washing solution, d) rinsing of the plastics, e) drying of the plastics, f) separation of the granular plastics from the thin plastics (polyethylene with silica filler, PVC, fabrics) by drawing them up in a flow of air making use of the shape effect, g) separation of the PVC and fabrics from the polyethylene with silica filler through fragmentation, h) pyrolysis of the polyethylene with silica filler, i) cracking of the pyrolysis gases and vapours in order to reduce their molecular weight and render them more suitable for handling and combustion to provide the heat necessary for pyrolysis, j) oxidation of the pyrolysis residue to remove carbonaceous residues a
    Type: Grant
    Filed: February 3, 2005
    Date of Patent: August 10, 2010
    Assignee: Millbrook Lead Recycling Technologies Limited
    Inventor: Giovanni Modica
  • Publication number: 20100043600
    Abstract: An outstandingly low environmental impact wet process recovers the lead content of an electrode slime and/or of lead minerals in the valuable form of high purity lead oxide or compound convertible to highly pure lead oxide by heat treatment in oven at relatively low temperature, perfectly suited for making active electrode pastes of new batteries or other uses.
    Type: Application
    Filed: November 3, 2009
    Publication date: February 25, 2010
    Applicant: Millbrook Lead Recycling Technologies Limited
    Inventor: Federica Martini
  • Publication number: 20100034715
    Abstract: Wet process of low environmental impact recovers the lead content of an electrode slime and/or of lead minerals in the valuable form of high purity-lead carbonates that are convertible to highly pure lead oxide by heat treatment in oven at relatively low temperature, perfectly suited for making active electrode pastes of new batteries or other uses.
    Type: Application
    Filed: January 15, 2008
    Publication date: February 11, 2010
    Applicant: Millbrook Lead Recycling Technologies Limited
    Inventor: Federica Martini