Patents Examined by Gary P. Staub
  • Apparatus and process
    Patent number: 5032373
    Abstract: Apparatus for the manufacture of sulphuric acid by the contact process of the type comprising at least one gas-concentrated sulphuric acid contacting unit and a sulphuric acid heat exchanger characterized in that the contacting unit and/or heat exchanger is formed of high silicon content austenitic steel. The steel is also of use in sulphuric acid concentrations. Reduced corrosion rates are provided.
    Type: Grant
    Filed: July 15, 1988
    Date of Patent: July 16, 1991
    Assignee: C-I-L, Inc.
    Inventors: Frederick W. S. Jones, Frank Smith