Patents by Inventor George Bentu

George Bentu 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 3-methyl-2-butanone from formic acid by extractive distillation with DMSO
    Patent number: 5190619
    Abstract: 3-Methyl-2-butanone cannot be separated from formic acid by distillation because of the presence of the maximum boiling azeotrope. 3-Methyl-2-butanone can be readily removed from formic acid by extractive distillation using dimethylsulfoxide (DMSO). Typical effective agents are: DMSO and heptanoic acid; DMSO, octanoic acid and butyl benzoate.
    Type: Grant
    Filed: March 30, 1992
    Date of Patent: March 2, 1993
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, George Bentu
  • Separation of m-xylene from o-xylene by extractive distillation using esters
    Patent number: 5019217
    Abstract: m-Xylene is difficult to separate from o-xylene by conventional distillation or rectification because of the close proximity of their boiling points. m-Xylene can be readily separated from o-xylene by using extractive distillation in which the extractive agent is a higher boiling ester. Typical examples of effective agents are diisononyl adipate, glycerol triacetate and dimethyl phthalate.
    Type: Grant
    Filed: February 7, 1990
    Date of Patent: May 28, 1991
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, George Bentu
  • Separation of 4-methyl-2-pentanone from formic acid by extractive distillation with dimethylamides
    Patent number: 4994151
    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 using dimethylamides. Typical effective agents are dimethylformamide; dimethylacetamide and acetyl salicyclic acid; dimethylacetamide, heptanoic acid and methyl benzoate.
    Type: Grant
    Filed: July 14, 1989
    Date of Patent: February 19, 1991
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, George Bentu
  • Separation of 3-methyl-2-butanone from formic acid by extractive distillation with sulfolane
    Patent number: 4957595
    Abstract: 3-Methyl-2-butanone cannot be separated from formic acid by distillation because of the presence of the maximum boiling azotrope. 3-Methol-2-butanoe can be readily removed from formic acid by extractive distillation using sulfolane. Typical effective agents are: sulfolane and ethylene glycol diacetate; sulfolane, m-toluic acid and anisole.
    Type: Grant
    Filed: November 7, 1989
    Date of Patent: September 18, 1990
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, George Bentu
  • Separation of 4-methyl-2-pentanone from formic or acetic acid by extractive distillation with sulfolane
    Patent number: 4948471
    Abstract: 4-Methyl-2-pentanone cannot be easily separated from formic acid or acetic acid by distillation because of the closeness of their boiling points. 4-Methyl-2-pentanone can be readily removed from formic acid or acetic acid by extractive distillation. Typical effective agents are sulfolane; sulfolane and heptanoic acid; sulfolane, azelaic acid and ethylene glycol diacetate.
    Type: Grant
    Filed: August 1, 1989
    Date of Patent: August 14, 1990
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, George Bentu