Patents by Inventor Malcolm C. E. Bell

Malcolm C. E. Bell has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Copper smelting system
    Patent number: 5194213
    Abstract: A system for continuous smelting of sulfidic copper concentrate in which an oxygen flash furnace is operatively connected with a continuous converter and the continuous converter is operatively connected with a finishing furnace.
    Type: Grant
    Filed: April 28, 1992
    Date of Patent: March 16, 1993
    Assignee: Inco Limited
    Inventors: Carlos M. Diaz, Malcolm C. E. Bell
  • Hydrometallurgical processing of precious metal-containing materials
    Patent number: 4615731
    Abstract: A hydrometallurgical process is provided for separating heavy metal nuisance elements such as As, Sb, Bi, Sn and Pb from precious metals and/or selenium. The process can be used as a step in an overall hydrometallurgical process for treating refinery residues such as anode slimes for the separation and recovery of valuable metal values.
    Type: Grant
    Filed: February 9, 1985
    Date of Patent: October 7, 1986
    Assignee: Inco Limited
    Inventors: John A. Thomas, Norman C. Nissen, Malcolm C. E. Bell, Alexander Illis
  • Non-aqueous hydrogenation of solid carbonaceous material
    Patent number: 4502941
    Abstract: A nonaqueous process of hydrogenating and liquefying solid carbonaceous material which includes heating the material in contact with a catalyst derived from FE(CO).sub.9 in the presence of hydrogen.
    Type: Grant
    Filed: January 31, 1984
    Date of Patent: March 5, 1985
    Assignee: Inco Limited
    Inventors: Kenneth R. Dymock, Malcolm C. E. Bell
  • Process for treatment of selenium-bearing materials
    Patent number: 4358430
    Abstract: Selenium-bearing materials are treated to convert selenium values to water-soluble form in a process which comprises producing a wet pellet product of uniform composition having a specified moisture content and size from an aqueous slurry containing the selenium-bearing material and dissolved sodium carbonate-containing reagent. In a preferred embodiment the slurry is pH-adjusted to neutralize free acid and/or to precipitate nonferrous base metals. spThis is a continuation of application Ser. No. 151,349 filed May 19, 1980, abandoned.
    Type: Grant
    Filed: October 14, 1981
    Date of Patent: November 9, 1982
    Assignee: Inco Limited
    Inventors: Grigori S. Victorovich, Ramamritham Sridhar, Malcolm C. E. Bell
  • Process for the recovery of metal values from anode slimes
    Patent number: 4229270
    Abstract: A process for treating anode slimes containing silver in which the silver is converted to a form soluble in dilute nitric acid, and in which after dissolution in dilute nitric acid, the silver is electrowon from solution. The process can be carried out by a route which is entirely hydrometallurgical. In addition to recovery silver, other values such as Se, Te, Ni and precious metals can be recovered.
    Type: Grant
    Filed: April 2, 1979
    Date of Patent: October 21, 1980
    Assignee: The International Nickel Co., Inc.
    Inventors: Kohur N. Subramanian, Malcolm C. E. Bell, John A. Thomas, Norman C. Nissen
  • Roast-leach copper recovery
    Patent number: 4168217
    Abstract: A copper-containing sulfidic material is dead-roasted at a temperature of at least 750.degree. C. and the resulting calcine is leached in a sulfuric acid solution to dissolve most of the copper in preference to any iron, nickel and cobalt in the material.
    Type: Grant
    Filed: April 10, 1978
    Date of Patent: September 18, 1979
    Assignee: The International Nickel Company, Inc.
    Inventors: Ashok D. Dalvi, Ramamritham Sridhar, Malcolm C. E. Bell