Patents by Inventor Marc W. Paffhausen

Marc W. Paffhausen 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).

  • Separation of 4-methyl-2-pentanone from formic acid by extractive distillation with DMSO
    Patent number: 5232558
    Abstract: 4-Methyl-2-pentanone cannot be easily separated from formic acid by distillation because of the closeness of their boiling points. 4-Methyl-2-pentanone can be readily removed from formic acid by extractive distillation. Typical effective agents are dimethylsulfoxide (DMSO) and 2-undecanone; DMSO and octanoic acid; DMSO and hexyl acetate.
    Type: Grant
    Filed: October 8, 1992
    Date of Patent: August 3, 1993
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, Marc W. Paffhausen
  • Separation of 4-methyl-2-pentanone from acetic acid by extractive distillation with DMSO
    Patent number: 5194123
    Abstract: 4-Methyl-2-pentanone cannot be easily separated from acetic acid by distillation because of the closeness of their boiling points. 4-Methyl-2-pentanone can be readily removed from acetic acid by extractive distillation. Typical effective agents are dimethlsulfoxide (DMSO); DMSO and adipic acid; DMSO, adipic acid and adiponitrile.
    Type: Grant
    Filed: July 6, 1992
    Date of Patent: March 16, 1993
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, Marc W. Paffhausen
  • Separation of 4-methyl-2-pentanone from acetic acid by extractive distillation with DMFA
    Patent number: 5092965
    Abstract: 4-Methyl-2-pentanone cannot be easily separated from acetic acid by distillation because of the closeness of their boiling points. 4-Methyl-2-phentanone can be readily removed from acetic acid by extractive distillation. Typical effective agents are dimethylformamide (DMFA); DMFA and m-toluic acid; DMFA, p-toluic acid and isobutyl heptyl ketone.
    Type: Grant
    Filed: May 2, 1991
    Date of Patent: March 3, 1992
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, Marc W. Paffhausen
  • Separation of vinyl acetate from ethyl acetate by extractive distillation
    Patent number: 4897161
    Abstract: Vinyl acetate cannot be easily removed from ethyl acetate by distillation because of the closeness of their boiling points. Vinyl acetate can be readily separated from ethyl acetate by means of extractive distillation using certain glycols or glycol ethers. Typical effective agents are 2-methyl -2,4-pentanediol, 1,3-butanediol, ethylene glycol methyl ether and diethylene glycol ethyl ether.
    Type: Grant
    Filed: March 20, 1989
    Date of Patent: January 30, 1990
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, Marc W. Paffhausen
  • Recovery of 4-methyl-2-pentanone from acetic acid by distillation
    Patent number: 4861436
    Abstract: When 4-methyl-2-pentanone and acetic acid mixtures are subjected to extractive distillation with a dimethyl sulfoxide - pelargonic acid mixture as the agent, the acetic acid is converted to gaseous ketene which is easily recovered from the 4-methyl-2-pentanone.
    Type: Grant
    Filed: February 7, 1989
    Date of Patent: August 29, 1989
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, Richard R. Rall, Marc W. Paffhausen