Patents by Inventor Clarence Frederick Hecklinger

Clarence Frederick Hecklinger 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).

  • Recovery of sodium nitrite from by-product process liquors containing sodium chloride
    Patent number: 3965247
    Abstract: According to the present invention, sodium nitrite is recovered from an aqueous solution containing dissolved sodium nitrite and sodium chloride by a process which comprises subjecting said solution to crystallization in a first crystallization zone under conditions sufficient to effect crystallization of sodium chloride, including operating at temperatures of from about 110.degree. to 130.degree.C, to produce a first slurry containing sodium chloride crystals; separating said crystals from said first slurry to produce a solution containing dissolved sodium nitrite; subjecting said sodium nitrite solution to crystallization in a second crystallization zone under conditions sufficient to effect crystallization of sodium nitrite from said solution, including operating at temperatures of from about 10.degree. to 60.degree.C, to form a second slurry containing sodium nitrite crystals; and recovering said sodium nitrite crystals from said second slurry.
    Type: Grant
    Filed: June 20, 1975
    Date of Patent: June 22, 1976
    Assignee: Allied Chemical Corporation
    Inventors: Clarence Frederick Hecklinger, Donald Edward Crook