Patents by Inventor Frank R. Broersma

Frank R. Broersma 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).

  • Method of preparing a controlled pore volume alumina with citric acid
    Patent number: 4179411
    Abstract: A method for preparing an alumina having controlled pore volume distribution is disclosed. The method requires the presence of 0.1-15% by weight of a water soluble aliphatic polycarboxylic acid having from 2-12 carbon atoms based on the dry weight of Al.sub.2 O.sub.3, during alumina precipitation. The resultant calcined alumina has a pore volume distribution such that:A. Nitrogen desorption measurements indicate that less than 10% of the total pores as determined by said method fall between 100-1200A in diameter;B. Nitrogen adsorption measurements indicate that between 10-50% of the total pore volume as determined fall between 100-1200A in diameter; andC. Mercury penetration porisimetry indicates that less than 10% of the total pores as determined by both nitrogen desorption and mercury methods fall between 100-50,000A in diameter.
    Type: Grant
    Filed: November 10, 1977
    Date of Patent: December 18, 1979
    Assignee: Nalco Chemical Company
    Inventors: Frank R. Broersma, Monica E. Choca
  • Ozonization catalyst
    Patent number: 4040982
    Abstract: Contaminants are removed from contaminated waste water by passing such waste water intimately mixed with ozone into contact with an ozone catalyst comprising ferric oxide supported on catalytically active alumina.
    Type: Grant
    Filed: January 12, 1976
    Date of Patent: August 9, 1977
    Assignee: Nalco Chemical Company
    Inventors: Michael R. Basila, Frank R. Broersma