Patents by Inventor John P. Motlow

John P. Motlow 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 producing ultra-high purity isopropanol
    Patent number: 6733637
    Abstract: A process for producing high purity isopropyl alcohol. In one embodiment, the process includes the steps of: (a) feeding a feed stream comprising at least about 99.9 wt. % isopropyl alcohol into a separation column; (b) separating the isopropyl alcohol into an overhead stream taken overhead from the separation column and a bottoms stream taken as bottoms from the separation column; and (c) removing the high purity isopropyl alcohol at a point: (i) below where the feed stream enters the separation column but above the bottoms stream, or (ii) above where the feed stream enters the separation column but below the overhead stream. The high purity isopropyl alcohol has a metals content of less than about 1 ppb and a water content of less than about 100 ppm.
    Type: Grant
    Filed: June 2, 2000
    Date of Patent: May 11, 2004
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Paul E. Burton, Dennis J. Davoren, Timothy P. Dean, John P. Motlow, Charles M. Yarbrough