Patents by Inventor Douglas Edward Schepp

Douglas Edward Schepp 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 the production and purification of N-butyl acrylate
    Patent number: 6180820
    Abstract: A process for the production of n-butyl acrylate (BuAcA) including the steps of esterifying acrylic acid (HAcA) with a n-butanol (n-BuOH) in a reaction zone, obtaining a condensate from the overhead vapors from the reaction zone which separates into organic and aqueous phases, feeding the organic phase comprising a major portion of BuAcA and minor portions of BuOH, water and light ends impurities to a finishing fractionation zone from which is obtained a side stream of a finished high purity BuAcA and an overhead condensate comprising BuAcA, BuOH, water, and light ends, recycling most of the overhead condensate from the finishing zone to the reaction zone, feeding the remainder of such condensate to a purge recovery zone together with a stream of makeup water, obtaining an overhead condensate from the purge recovery zone which separates into organic and aqueous phases each containing a portion of light ends produced in the reaction, recycling a portion of the organic phase as reflux to the purge recovery zone
    Type: Grant
    Filed: September 14, 1999
    Date of Patent: January 30, 2001
    Assignee: Celanese International Corporation
    Inventors: Mahmood Nayyer Azam Jawaid, Douglas Edward Schepp
  • Process for the production and purification of n-butyl acrylate
    Patent number: 6172258
    Abstract: A process for the production of n-butyl acrylate (BuAcA) including the steps of esterifying acrylic acid (HAcA) with n-butanol (n-BuOH) in a reaction zone, obtaining a condensate from the overhead vapors from the reaction zone which separates into organic and aqueous phases, feeding the organic phase comprising a major portion of BuAcA and minor portions of BuOH, water and light ends impurities to a finishing fractionation zone from which is obtained a side stream of a finished high purity BuAcA and an overhead condensate comprising BuAcA, BuOH, water and light ends, recycling most of the overhead condensate from the finishing zone to the reaction zone, feeding the remainder of such condensate to a purge recovery zone, obtaining an overhead condensate from the purge recovery zone which separates into organic and aqueous phases each containing a portion of light ends produced in the reaction, recycling a portion of the organic phase as reflux to the purge recovery zone and discarding the remainder.
    Type: Grant
    Filed: September 14, 1999
    Date of Patent: January 9, 2001
    Assignee: Celanese International Corporation
    Inventors: Mahmood Nayyer Azam Jawaid, Douglas Edward Schepp