Patents by Inventor B. Frank Wood

B. Frank Wood 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).

  • Processes for cystallizing 4, 4'-dimethyl bibenzoate (DMBB) recovered from polyester byproduct streams
    Patent number: 5801269
    Abstract: Processes for recovering 4,4'-dimethyl bibenzoate (DMBB) from byproduct streams of dimethyl terephthalate (DMT) production are disclosed. The byproduct streams are treated to produce an overhead stream which includes DMBB. In one aspect of the invention, the overhead product stream is added to an organic solvent under conditions sufficient to rapidly form a suspension of crystallized DMBB. In another aspect of the invention, the overhead is dissolved in an appropriate organic solvent and cooled to form a suspension of DMBB crystals in the solvent. A portion of the suspension is removed, and the remaining portion of the suspension centrifuged to recover DMBB crystals. In still another aspect of the invention, the overhead stream is treated with an organic solvent to form a slurry of DMBB crystals, and the resultant slurry thermally treated to increase the concentration of DMBB crystals therein while also solubilizing any organic contaminants.
    Type: Grant
    Filed: April 30, 1997
    Date of Patent: September 1, 1998
    Assignee: Hoechst Celanese Corp.
    Inventors: Carrie A. Feeney, Ida L. Jones, Bennett C. Ward, Thomas M. Kenesson, Charles B. Hilton, Michael R. Ahern, Gregory M. Adams, Edward M. de la Garza, B. Frank Wood, Jr., Thomas L. Grantland, Kan J. Tsai, James L. Ragan
  • Color control & stability in acetaminophen
    Patent number: 5399760
    Abstract: A method is provided for purifying crude N-acetyl-para-aminophenol (APAP) containing color bodies or their precursors, the method comprising: a) forming a solution of the crude APAP; and b) subsequently contacting the solution with substoichiometric quantifies of an acetylating agent for a sufficient period of time to convert said color bodies or their precursors to substantially non-color bodies/stable, colorless substances; said quantities of acetylating agent provided is such that substantially none of the APAP is converted to other compounds.
    Type: Grant
    Filed: August 11, 1993
    Date of Patent: March 21, 1995
    Assignee: Hoechst Celanese Corporation
    Inventors: Edward G. Zey, Olan S. Fruchey, Thomas H. Shockley, Joe S. Trevino, B. Frank Wood, Daniel D. Lindley
  • Process for the preparation of arylethylamines and substituted arylethylamines
    Patent number: 5220066
    Abstract: This invention provides a process for directly preparing arylethylamines and their salts from (.alpha.-halo-.alpha.-oximino)acetophenones. The process involves hydrogenation in presence of a transition metal catalyst. The process is illustrated by conversion of 4-hydroxy-(.alpha.-chloro-.alpha.
    Type: Grant
    Filed: March 30, 1992
    Date of Patent: June 15, 1993
    Assignee: Hoechst Celanese Corporation
    Inventors: Ahmed Tafesh, B. Frank Wood, Joseph A. McDonough, Graham N. Mott
  • Process for the preparation of arylethylamines and substituted arylethylamines
    Patent number: 5220067
    Abstract: This invention provides a process for directly preparing hydrohalide salts of arylethylamines from (.alpha.-chloro-.alpha.-oximino)acetophenones. The process involves hydrogenation in presence of a transition metal catalyst in an organic acid in substantial absence of moisture. The process is illustrated by conversion of 4-hydroxy (.alpha.-chloro-.alpha.
    Type: Grant
    Filed: March 30, 1992
    Date of Patent: June 15, 1993
    Assignee: Hoechst Celanese Corporation
    Inventors: Ahmed Tafesh, B. Frank Wood, Joseph A. McDonough, Graham N. Mott