Patents by Inventor Philip D. T. Davies

Philip D. T. Davies 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 separating sulfuric acid and carboxylic acids
    Patent number: 4838998
    Abstract: The amount of water required to effect efficient separation of a mixture of sulfuric acid and carboxylic acids by distillation, is reduced, by diluting the mixture while in the distillation column in a prescribed manner with sufficient water to provide a water:sulfuric acid mole ratio of about 1:1. The heat generated by the internal dilution reduces the energy requirement of the column. Feeding the dilution water to the column below the feed mixture is a key element of the process.
    Type: Grant
    Filed: December 4, 1987
    Date of Patent: June 13, 1989
    Assignee: Rohm and Haas Company
    Inventors: Philip D. T. Davies, Lawrence S. Kirch