Patents Assigned to Alcoa Company of America
  • Publication number: 20050262967
    Abstract: The present invention relates to a method of recycling aluminum clad materials. In particular, the method relates to recycling clad materials such as brazing sheet comprised of two or more aluminum alloys, by selective melting of one of the alloys. The feedstock is agitated during heating to allow separation of the molten alloy from the unmelted core, and the molten alloy is removed, such as by draining off during the process.
    Type: Application
    Filed: May 27, 2004
    Publication date: December 1, 2005
    Applicant: Alcoa Company of America
    Inventor: David Leon
  • Patent number: 5207914
    Abstract: The invention includes a process for performing high performance liquid chromatography in the reverse phase. The present process for high performance separations by liquid chromatography uses a separations media, including separations packing materials for packed column separations, of polybutadiene coated and crosslinked on a surface of generally spherical metal oxide/hydroxide support particles comprising crystals of metal oxide/hydroxide with the crystals extending radially outward from a central core region and having a shape selected from principally acicular to principally lamellar. It has been found that liquid chromatography using the process of the present invention works particularly well in separating basic, nitrogen-containing compounds.
    Type: Grant
    Filed: August 13, 1991
    Date of Patent: May 4, 1993
    Assignee: Alcoa Company of America
    Inventor: GwoChung Lin