Patents by Inventor Walter A. Braunlin

Walter A. Braunlin 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 heating coal-oil slurries
    Patent number: 4424108
    Abstract: Controlling gas to slurry volume ratio to achieve a gas holdup of about 0.4 when heating a flowing coal-oil slurry and a hydrogen containing gas stream allows operation with virtually any coal to solvent ratio and permits operation with efficient heat transfer and satisfactory pressure drops. The critical minimum gas flow rate for any given coal-oil slurry will depend on numerous factors such as coal concentration, coal particle size distribution, composition of the solvent (including recycle slurries), and type of coal. Further system efficiency can be achieved by operating with multiple heating zones to provide a high heat flux when the apparent viscosity of the gas saturated slurry is highest.
    Type: Grant
    Filed: January 8, 1982
    Date of Patent: January 3, 1984
    Assignee: The Pittsburg & Midway Coal Mining Co.
    Inventors: Walter A. Braunlin, Alan Gorski, Leo J. Jaehnig, Clifford J. Moskal, Joseph D. Naylor, Krishnia Parimi, John V. Ward