Patents by Inventor Harry L. Mahl, Jr.

Harry L. Mahl, Jr. 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 prilling ammonium nitrate
    Patent number: 4076773
    Abstract: This invention comprises an improvement in a method for preparing ammonium nitrate prills wherein molten ammonium nitrate is prilled in a prill tower in the presence of cooling gas containing a predetermined amount of ammonia to retard thermal dissociation of the ammonium nitrate, thereby to decrease formation of extremely small aerosol particles of ammonium nitrate; the improvement comprises: (a) withdrawing cooling gas from an upper portion of the prill tower; (b) cooling and dehumidifying the withdrawn gas; and (c) recycling the cooled and dehumidified gas to a lower portion of the prill tower.
    Type: Grant
    Filed: March 18, 1976
    Date of Patent: February 28, 1978
    Assignee: W. R. Grace & Co.
    Inventors: Harry L. Mahl, Jr., Franklin D. Clark