Patents by Inventor Harvey B. Cochran

Harvey B. Cochran 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).

  • Process for the purification of effluents and purge streams containing trace elements
    Patent number: 4578195
    Abstract: An improved process for treating aqueous effluents and purge streams to selectively remove polluting elements such as iron, copper, lead and mercury therefrom is described. The procedure comprises contacting the effluent with a poly(dithiocarbamate) chelating agent whereby the polluting elements are absorbed. The resin is extracted with an acidic aqueous solution having a pH of from about 4 to about 6; and removing the resin. When this is done, the residual content of these polluting elements in the effluent is reduced to a level below EPA required levels so that the effluent can safely be discharged into the surrounding ecosystem. The poly(dithiocarbamate) resin containing the polluting elements can be disposed of, for example, by being deposited in an unsecured landfill.
    Type: Grant
    Filed: July 26, 1984
    Date of Patent: March 25, 1986
    Assignee: Olin Corporation
    Inventors: Sanders H. Moore, Maurice R. Smith, Harvey B. Cochran
  • Process for producing poly(dithiocarbamate) chelating resins
    Patent number: 4518760
    Abstract: A novel process is provided for producing a poly(dithiocarbamate) resin chelating agent which comprises dissolving a polyimine in an alcohol solvent to form a polyimine solution. A polyisocyanate is admixed in the polyimine solution to produce a cross-linked polyamine-polyurea precursor resin. The cross-linked polyamine-polyurea precursor resin is then reacted with a mixture of NH.sub.4 OH and CS.sub.2 to produce a poly(dithiocarbamate) resin chelating agent.The novel process can employ a polyimine in anhydrous or aqueous suspension form and uses non-hazardous solvents for the polyisocyanate reactant.
    Type: Grant
    Filed: July 13, 1984
    Date of Patent: May 21, 1985
    Assignee: Olin Corporation
    Inventors: Maurice R. Smith, Harvey B. Cochran
  • Method of determination of alkaline earth metal ions in concentrated alkali metal chloride brines
    Patent number: 4308030
    Abstract: A method for determining low level concentrations of alkaline earth metals in a concentrated aqueous alkali metal chloride brine containing alkaline earth metal ions comprises heating a sample of the brine to a temperature sufficient to remove water and form anhydrous alkali metal chloride. The anhydrous alkali metal chloride is then further heated to a temperature range in which the alkali metal chloride undergoes a change. The anhydrous alkali metal chloride is then vaporized and the alkaline earth metals atomized and passed through an analyzer where the concentration of alkaline earth metals are determined.Using the method of the present invention, alkaline earth metals such as calcium can be detected in concentrations as low as 1 part per billion, while magnesium can be detected in concentrations as low as 0.4 parts per billion.
    Type: Grant
    Filed: January 12, 1981
    Date of Patent: December 29, 1981
    Assignee: Olin Corporation
    Inventors: Maurice R. Smith, Harvey B. Cochran