Patents by Inventor Randi W. Wytcherley

Randi W. Wytcherley 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 hexane from vinyl acetate and methyl acrylate by extractive distillation
    Patent number: 5393385
    Abstract: Hexane is difficult to separate from vinyl acetate and/or methyl acrylate by conventional distillation or rectification because of the closeness of their boiling points. Hexane can be readily separated from vinyl acetate and/or methyl acrylate by extractive distillation. Effective agents are dimethylsulfoxide and dimethylformamide.
    Type: Grant
    Filed: March 14, 1994
    Date of Patent: February 28, 1995
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, Randi W. Wytcherley
  • Separation of formic acid from acetic acid by azeotropic distillation
    Patent number: 5264086
    Abstract: Formic acid difficult to separate from acetic acid by conventional distillation or rectification because of the close proximity of their boiling points. Formic acid can be readily separated from acetic acid by using azeotropic distillation. Effective agents are cyclopentane and tetrachloroethylene.
    Type: Grant
    Filed: January 29, 1993
    Date of Patent: November 23, 1993
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, Randi W. Wytcherley
  • Separation of octene-1 from its isomers by azeotropic and extractive distillation
    Patent number: 5262015
    Abstract: Octene-1 is difficult to separate from several of its isomers by conventional distillation or rectification because of the closeness of their boiling points. Octene-1 can be readily separated from its close boiling isomers by azeotropic or extractive distillation. Effective agents are: for azeotropic distillation, t-amyl methyl ether; for extractive distillation, isophorone.
    Type: Grant
    Filed: February 26, 1993
    Date of Patent: November 16, 1993
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, Randi W. Wytcherley
  • Separation of hexane from vinyl acetate by azeotropic distillation
    Patent number: 5256259
    Abstract: Hexane cannot be separated from vinyl acetate by conventional distillation or rectification because of the minimum boiling azeotrope. Hexane can be readily separated from vinyl acetate by using azeotropic distillation. Typical examples of effective agents are acetone, acetonitrile or methyl t-butyl ether.
    Type: Grant
    Filed: March 29, 1993
    Date of Patent: October 26, 1993
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, Randi W. Wytcherley
  • Separation of toluene from methyl isobutyl ketone by azeotropic distillation
    Patent number: 5250157
    Abstract: Toluene cannot be separated from methyl isobutyl ketone by conventional distillation or rectification because of the minimum boiling azeotrope. Toluene can be readily separated from methyl isobutyl ketone by using azeotropic distillation. Typical examples of effective agents are 1-butanol, 2-methoxyethanol and n-heptane.
    Type: Grant
    Filed: February 22, 1993
    Date of Patent: October 5, 1993
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, Randi W. Wytcherley
  • Separation of vinyl acetate from methyl acrylate by extractive distillation
    Patent number: 5240567
    Abstract: The separation of vinyl acetate from methyl acrylate by distillation is difficult because of the closeness of their boiling points. Vinyl acetate can be readily removed from methyl acrylate by extractive distillation. Typical effective agents are phenol, methoxyethanol and isobutyl vinyl ether.
    Type: Grant
    Filed: April 2, 1993
    Date of Patent: August 31, 1993
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, Randi W. Wytcherley
  • Separation of hexane from vinyl acetate and methyl acrylate by extractive distillation
    Patent number: 5236559
    Abstract: Hexane cannot be removed from hexane--vinyl acetate--methyl acrylate mixtures because of the ternary azeotrope. Hexane can be readily removed from hexane--vinyl acetate--methyl acrylate mixtures by extractive distillation. Typical effective agents are phenol, diethylene glycol methyl ether and 2-nitropropane.
    Type: Grant
    Filed: January 22, 1993
    Date of Patent: August 17, 1993
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, Randi W. Wytcherley
  • Separation of formic acid from acetic acid by extractive distillation
    Patent number: 5227029
    Abstract: Formic acid cannot be easily removed from formic acid-acetic acid mixtures by distillation because of the closeness of their boiling points. Formic acid can be readily removed from mixtures containing it and acetic acid by extractive distillation. Typical effective agents are 2-nitrotoluene, 1-nitropropane and m-nitrobenzoic acid.
    Type: Grant
    Filed: January 29, 1993
    Date of Patent: July 13, 1993
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, Randi W. Wytcherley
  • Separation of N-hexane from vinyl acetate by extractive distillation
    Patent number: 5225050
    Abstract: Hexane cannot be removed from hexane - vinyl acetate mixtures by distillation because of the minimum boiling azeotrope. Hexane can be readily removed from vinyl acetate by extractive distillation. Typical effective agents are phenol, 1-nitropropane and benzyl alcohol.
    Type: Grant
    Filed: December 15, 1992
    Date of Patent: July 6, 1993
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, Randi W. Wytcherley