Patents by Inventor Pietro Gamba

Pietro Gamba 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 purifying crude glycerol
    Patent number: 4990695
    Abstract: The invention provides a process for purifying crude glycerol such as splitters crude, soaplye crude and methanolysis crude which comprises a microfiltration step over a filter material on a ceramic support preferably comprising alumina. Preferably the filter material comprises zirconia and/or alumina. Preferably the process further comprises the step of distillation and/or treatment with ion exchange resins. Also the process may involve a combination of microfiltration and ultrafiltration.
    Type: Grant
    Filed: August 9, 1989
    Date of Patent: February 5, 1991
    Assignee: Unilever Patent Holdings B.V.
    Inventors: Thomas Buenemann, Johannes C. Oudejans, Pietro Gamba, Aldo Rampi