Patents by Inventor Bahram Amirijafari

Bahram Amirijafari 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).

  • Combination thermal and solvent extraction oil recovery process and apparatus
    Patent number: 4495057
    Abstract: A combination process disclosed utilizes a thermal (pyrolysis) operation (12) and solvent extraction operation (11) that operate simultaneously on an infeed of crushed tar sand (13). In a heat recovery operation (15) the solvent extraction operation receives waste heat from hot spent sand from the thermal operation to increase operating efficiency of the process. Makeup solvent is taken from the oil product derived from the extraction operation and recycled to be used in the solvent extraction operation. In a blending operation (16) the sand from both thermal and solvent extraction operations are blended in a sand mixer (34) to improve the quality of the sand discharged and the oil products from both operations are blended by a product mixer (31) to increase the viscosity of the final oil product.
    Type: Grant
    Filed: May 7, 1982
    Date of Patent: January 22, 1985
    Inventors: Bahram Amirijafari, Herbert E. Nuttall, Jr.