Patents Represented by Attorney Thomas M. Hammond

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  • Method for the condensation of carbammate in urea-synthesis installations
    Patent number: 4082797
    Abstract: In a urea-synthesis installation, the problem of the condensation of the ammonium carbamate is solved by providing a condensation zone composed of a horizontal tube bundle which is placed under the static pressure of a liquid head. The ratio of the liquid head height to the diameter of the circumference encompassing the outermost tube layer of the bundle of tubes is critical: it should be between 5 and 30, 10 being the preferred value.
    Type: Grant
    Filed: April 20, 1976
    Date of Patent: April 4, 1978
    Assignee: Snamprogetti, S.p.A.
    Inventors: Umberto Zardi, Vincenzo Lagana', Andrea Bonetti, Giorgio Schmid