Patents Assigned to Lloyd Berg
  • Separation of formic acid from acetic acid by azeotropic distillation
    Patent number: 5633402
    Abstract: Formic acid is difficult to separate from acetic acid by conventional distillation or rectification because of the proximity of their boiling points. Formic acid can be readily separated from acetic acid by using azeotropic distillation. Effective agents are acetonitrile and isopropyl acetate.
    Type: Grant
    Filed: September 1, 1995
    Date of Patent: May 27, 1997
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of formic acid from acetic acid by extractive distillation
    Patent number: 5599979
    Abstract: Formic acid is 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 extractive distillation. Effective agents are propionic acid, butyric acid, valeric acid and 2-ethyl hexanoic acid.
    Type: Grant
    Filed: September 8, 1995
    Date of Patent: February 4, 1997
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of 3-carene and limonene by extractive distillation
    Patent number: 5597455
    Abstract: 3-Carene and limonene cannot be separated from each other by rectification because of the closeness of their boiling points. They are readily separated by extractive distillation. Effective agents are: diethylene glycol phenyl ether, nonyl phenol, tripropylene glycol methyl ether, ethyl salicylate, 4-ethylphenol and 2-phenoxyethanol.
    Type: Grant
    Filed: January 16, 1996
    Date of Patent: January 28, 1997
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of 3-carene and limonene by azeotropic distillation
    Patent number: 5582693
    Abstract: 3-Carene and limonene cannot be separated from each other by rectification because of the closeness of their boiling points. They are readily separated by azeotropic distillation. Effective agents are: cyclopentanol, 2-nitropropane, ethyl formate amyl acetate dimethyl carbonate, tetrahydrofuran, acetic acid and 2-amino-amethyl-1-propanol.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: December 10, 1996
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of butyraldehyde from ethanol by azeotropic distillation
    Patent number: 5580427
    Abstract: Butyraldehyde cannot be separated from ethanol by conventional distillation or rectification because they form a minimum boiling azeotrope. Butyraldehyde can be readily separated from ethanol by azeotropic distillation. Effective agents are ethyl formate, hexane and isopropyl ether.
    Type: Grant
    Filed: November 7, 1995
    Date of Patent: December 3, 1996
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of isopropanol from 2-butanone by extractive distillation
    Patent number: 5470443
    Abstract: Isopropanol is difficult to separate from 2-butanone by conventional distillation or rectification because of the proximity of their boiling points. Isopropanol can be readily separated from 2-butanone by extractive distillation. Effective agents are o-cresol, ethylene glycol and nitroethane.
    Type: Grant
    Filed: January 10, 1995
    Date of Patent: November 28, 1995
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of o-xylene from p-xylene and m-xylene by azeotropic distillation
    Patent number: 5466345
    Abstract: o-Xylene cannot be separated from p-xylene and m-xylene by conventional distillation or rectification because of the proximity of their boiling points. o-Xylene can be readily separated from mixtures of p-xylene and m-xylene by azeotropic distillation. Effective agents are 3-methyl-1-butanol, methyl propionate and 3-pentanone.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: November 14, 1995
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of 1-hexene from hexane by extractive distillation
    Patent number: 5460700
    Abstract: 1-Hexene is difficult to separate from hexane by conventional distillation or rectification because of the proximity of their boiling points. 1-Hexene can be readily separated from hexane by extractive distillation. Effective agents are hexyl acetate, methyl amyl alcohol and acetophenone.
    Type: Grant
    Filed: May 19, 1994
    Date of Patent: October 24, 1995
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of benzene from close boiling hydrocarbons by extractive distillation
    Patent number: 5458741
    Abstract: Benzene is difficult to separate from cyclohexane or cyclohexene by conventional distillation or rectification because of the close proximity of their boiling points. Benzene can be readily separated from cyclohexane or cyclohexene by using extractive distillation. Effective agents are: for benzene from cyclohexane, methyl acetoacetate; for benzene from cyclohexene, ethyl acetoacetate.
    Type: Grant
    Filed: January 14, 1994
    Date of Patent: October 17, 1995
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of ethanol from 2-butanone by extractive distillation
    Patent number: 5453166
    Abstract: Ethanol is impossible to separate from 2-butanone by conventional distillation or rectification because of the minimum boiling azeotrope between these two. Ethanol can be readily separated from 2-butanone by extractive distillation. Effective agents are dipromyl amine, phenol and dimethylsulfoxide.
    Type: Grant
    Filed: November 7, 1994
    Date of Patent: September 26, 1995
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of xylenes by extractive distillation
    Patent number: 5453167
    Abstract: p-Xylene cannot be separated from m-xylene by distillation or rectification because of the proximity of their boiling points. p-Xylene can be separated from m-xylene by means of extractive distillation. Effective agents are 3-ethylphenol and isopropyl palmitate. Effective agents for separating mixtures of p-xylene, m-xylene and o-xylene are 2-butoxyethyl acetate and 1,1,1-trichloroethane.
    Type: Grant
    Filed: April 7, 1995
    Date of Patent: September 26, 1995
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of 2-pentanol, 3-methyl-2-butanol and 1-butanol by azeotropic distillation
    Patent number: 5447608
    Abstract: 3-Methyl-2-butanol, 2-pentanol and 1-butanol are difficult to separate by conventional distillation or rectification because of the proximity of their boiling points. Mixtures of these three can be readily separated from each other by azeotropic distillation. Effective agents are hexyl acetate, hexane and 3-methyl pentane.
    Type: Grant
    Filed: August 1, 1994
    Date of Patent: September 5, 1995
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of m-xylene from xylenes by azeotropic distillation
    Patent number: 5445715
    Abstract: m-Xylene is very difficult to separate from mixtures of p-xylene and o-xylene by conventional distillation or rectification because of the proximity of their boiling points. m-Xylene can be readily separated from p-xylene and mixtures of p-xylene and o-xylene by azeotropic distillation. An effective agent is tetraethyl ortho silicate.
    Type: Grant
    Filed: March 27, 1995
    Date of Patent: August 29, 1995
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of ethanol from isopropanol by extractive distillation
    Patent number: 5445716
    Abstract: Ethanol is difficult to separate from isopropanol by conventional distillation or rectification because of the proximity of their boiling points. Ethanol can be readily separated from isopropanol by extractive distillation. Effective agents are dipentene, anisole and ethyl benzene.
    Type: Grant
    Filed: October 18, 1994
    Date of Patent: August 29, 1995
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of heptane from 1-heptene by extractive distillation
    Patent number: 5443697
    Abstract: Heptane is difficult to separate from 1-heptene by conventional distillation or rectification because of the proximity of their boiling points. Heptane can be readily separated from 1-heptene by extractive distillation. Effective agents are diacetone alcohol, ethyl butyrate and dimethylsulfoxide.
    Type: Grant
    Filed: May 19, 1994
    Date of Patent: August 22, 1995
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of xylenes by extractive distillation
    Patent number: 5441608
    Abstract: p-Xylene cannot be separated from m-xylene by distillation or rectification because of the proximity of their boiling points. p-Xylene can be separated from m-xylene by means of extractive distillation. Effective agents are 3-ethylphenol and 1,1,2-trichloroethane. Effective agents for separating mixtures of p-xylene, m-xylene and o-xylene are 2-butoxyethyl acetate and 1,1,1-trichloroethane.
    Type: Grant
    Filed: May 23, 1994
    Date of Patent: August 15, 1995
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of 3-methyl-2-butanol from 2-pentanol by azeotropic
    Patent number: 5439561
    Abstract: 3-Methyl-2-butanol is difficult to separate from 2-pentanol by conventional distillation or rectification because of the proximity of their boiling points. 3-Methyl-2-butanol can be readily separated from 2-pentanol by azeotropic distillation. Effective agents are 2,2-dimethyl butane, ethyl acetate and dioxane.
    Type: Grant
    Filed: November 28, 1994
    Date of Patent: August 8, 1995
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of ethanol from isopropanol by azeotropic distillation
    Patent number: 5437770
    Abstract: Ethanol is difficult to separate from isopropanol by conventional distillation or rectification because of the proximity of their boiling points. Ethanol can be readily separated from isopropanol by azeotropic distillation. Effective agents are sec. butyl acetate, hexene-1 and 1,3-dioxolane.
    Type: Grant
    Filed: September 13, 1994
    Date of Patent: August 1, 1995
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of methylene chloride from tetrahydrofuran by extractive distillation
    Patent number: 5425854
    Abstract: Methylene chloride is difficult to separate from tetrahydrofuran by conventional distillation or rectification because of the proximity of their vapor pressures. Methylene chloride can be readily separated from tetrahydrofuran by extractive distillation. Effective agents are 1-pentanol, 1,2-butanediol and 3-nitrotoluene.
    Type: Grant
    Filed: January 17, 1995
    Date of Patent: June 20, 1995
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of ethyl benzene from p-xylene by extractive distillation
    Patent number: 5425855
    Abstract: Ethyl benzene is difficult to separate from p-xylene by conventional distillation or rectification because of the closeness of their boiling points. Ethyl benzene can be readily separated from p-xylene by extractive distillation. An effective agent is 5-methyl-2-hexanone, also called methyl isoamyl ketone.
    Type: Grant
    Filed: April 8, 1994
    Date of Patent: June 20, 1995
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg