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  • METHOD AND APPARATUS FOR RECOVERING A METAL AND SEPARATING ARSENIC FROM AN ARSENIC CONTAINING SOLUTION
    Publication number: 20120138529
    Abstract: A method and apparatus for recovering a metal and separating arsenic from an arsenic-containing solution. The method includes contacting the arsenic-containing solution with a fixing agent that comprises a rare earth compound to produce an arsenic-depleted solution and an arsenic-laden fixing agent. The fixing agent comprises a rare earth-containing compound that can include cerium, lanthanum, or praseodymium. The fixing agent is separated from the arsenic-depleted solution and a recoverable metal is separated from one or more of the arsenic-containing solution and the arsenic-depleted solution. Recoverable metals can include metal from Group IA, Group IIA, Group VIII and the transition metals. The arsenic-containing solution can be formed by contacting an arsenic-containing material with a leaching agent. Arsenic-depleted solids formed during the leach can also be separated and recovered.
    Type: Application
    Filed: December 18, 2007
    Publication date: June 7, 2012
    Applicant: MOLYCORP MINERALS, LLC
    Inventors: John L. Burba, III, Carl R. Hassler, C. Brock O'Kelley, Charles F. Whitehead
  • Elastic solids having reversible stress-induced fluidity
    Patent number: 5721198
    Abstract: Elastic solids having reversible stress-induced fluidity are prepared, e.g., by combining liquid formulations with a crystalline mixed metal hydroxide conforming substantially to the formulaLi.sub.m D.sub.d T(OH).sub.(m+2d+3+n.multidot.a) (A.sup.n).sub.a .multidot.xH.sub.2 Owhere m is amount of Li, d is amount of divalent metal D, T is a trivalent metal, A represents at least one anion or negative-valence radical of valence n and a is the amount of A, and xH.sub.2 O represents excess waters of hydration, if any. These make useful coatings.The instantly reversible fluidization of these unique elastic solids may be expressed as:.sigma.=k.sub..alpha. .epsilon. when .epsilon.<F, for the solid phase; and.sigma.=f(d.epsilon.'/dt) when .epsilon.'>F, (this equation represents a generalized form for the usual theological equations); for a cycle of .epsilon., -xF <.epsilon.<xF, and when .epsilon.' equals 0 the liquid phase changes back to the solid phase, andwhere the symbol .sigma. represents stress; k.
    Type: Grant
    Filed: August 18, 1995
    Date of Patent: February 24, 1998
    Assignee: The Dow Chemical Company
    Inventors: John L. Burba, III, Christopher P. Christenson
  • Elastic solids having reversible strain-induced fluidity
    Patent number: 5443761
    Abstract: Elastic solids having reversible stress-induced fluidity are prepared, e.g., by combining liquid formulations with a crystalline mixed metal hydroxide conforming substantially to the formulaLi.sub.m D.sub.d T(OH).sub.(m+2d+3+n.a) (A.sup.n).sub.a.xH.sub.2 Owhere m is amount of Li, d is amount of divalent metal D, T is a trivalent metal, A represents at least one anion or negative-valence radical of valence n and a is the amount of A, and xH.sub.2 O represents excess waters of hydration, if any. These make useful coatings.The instantly reversible fluidization of these unique elastic solids may be expressed as:.tau.=ka.epsilon.,When .epsilon.<F, for the solid phase; and.epsilon.=f(d.epsilon.'/dt)when .epsilon.'<F, (this equation represents a generalized form for the usual rheological equations); for a cycle of .epsilon., -xF<.epsilon.<xF, and when .epsilon.' equals 0 the liquid phase changes back to the solid phase, andwhere the symbol .sigma. represents stress; k.sub.
    Type: Grant
    Filed: October 11, 1991
    Date of Patent: August 22, 1995
    Assignee: The Dow Chemical Company
    Inventors: John L. Burba, III, Christopher P. Christenson
  • Polyvinyl chloride plastisols
    Patent number: 4533524
    Abstract: What are disclosed are plastisols comprising a finely divided vinyl chloride polymer and the usual fillers, additives, and plasticizers, to which plastisols is added, as an adhesion promoter, the condensation product formed between (1) a polyaminoamide, comprising polymerized fatty acids and an excess of a polyalkylene polyamine and (2) a carboxylic acid or an ester thereof, and methods for coating or adhering a substrate with such plastisols by applying said plastisols to the substrate and baking at temperatures of 90.degree. C. and up.
    Type: Grant
    Filed: December 30, 1982
    Date of Patent: August 6, 1985
    Assignee: Schering AG.
    Inventors: Christian Burba, Ulrich Goeke, Norbert Esper
  • Polyvinyl chloride plastisols
    Patent number: 4673710
    Abstract: Plastisols comprising a finely divided vinyl chloride polymer and the usual fillers, additives, and plasticizers, to which plastisols is added, as an adhesion promoter, an adduct formed between an epoxy compound and the condensation product formed between (1) a polyaminoamide, comprising polymerized fatty acids and an excess of a polyalkylene polyamine and (2) a carboxylic acid or an ester thereof, and methods for coating or adhering a substrate with such plastisols by applying said plastisols to the substrate and baking at temperatures of 90.degree. C. and up.
    Type: Grant
    Filed: January 28, 1985
    Date of Patent: June 16, 1987
    Assignee: Schering AG
    Inventors: Christian Burba, Ulrich Goeke, Norbert Esper
  • Method and apparatus for using light to identify a key
    Patent number: 6064747
    Abstract: An apparatus and method for identifying a key using a housing having a support that allows light to pass therethrough adjacent the key, a light source for emitting light through at least a portion of the support so as to form a first image of at least a portion of the profile of the key, a substantially planar light beam directed at the key so as to form a second image as the light beam interfaces with the side of the key, and a receiving means for receiving the first image of the profile of the key and receiving the second image so that the non-planar portion of the side of the key forms a non-linear segment across the width of the key. The present invention then can digitize the first and second images and create key information from the digitized images, in which the information is compared to stored information about a plurality of reference keys.
    Type: Grant
    Filed: May 13, 1997
    Date of Patent: May 16, 2000
    Assignee: Axxess Technologies, Inc.
    Inventors: Phillip R. Wills, Roger F. Kromann, Norman N. Axelrod, Wesley A. Schroeder, James A. Berilla, Bryce Burba
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