Patents by Inventor Diane Elizabeth Allen

Diane Elizabeth Allen 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).

  • Acrylic acid recovery utilizing ethyl acrylate and selected co-solvents
    Publication number: 20030146081
    Abstract: A method of recovering acrylic acid from a mixture comprising acrylic acid, water and acetic acid is disclosed, which includes: (a) extracting acrylic acid from the mixture with a solvent mixture comprising ethyl acrylate as the preponderant component thereof and an organic co-solvent selected from the group consisting of toluene, heptane, 1-heptene, methylcyclohexane, cycloheptane, cycloheptadiene, cycloheptatriene, 2,4-dimethyl-1,3 pentadiene, methylcyclohexene and methylenecyclohexene to form an extracted composition; and (b) azeotropically distilling the extracted composition to recover acrylic acid.
    Type: Application
    Filed: January 8, 2002
    Publication date: August 7, 2003
    Inventors: Salvador Aldrett, Diane Elizabeth Allen, Nathan K. Powell, Christopher Lawrence Wilkins, Edmund Jungpiao Yang
  • Alternate extraction solvent for acrylic acid purification process
    Publication number: 20030121768
    Abstract: A process for the separation and purification of acrylic acid is disclosed, wherein ethyl propionate is employed as an extraction solvent.
    Type: Application
    Filed: December 13, 2001
    Publication date: July 3, 2003
    Inventors: Salvador Aldrett Lee, Diane Elizabeth Allen, Christopher Lawrence Wilkins