Patents by Inventor Lloyd Berg

Lloyd Berg 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 tertiary butyl alcohol from water by azeotropic or extractive distillation
    Patent number: 5084142
    Abstract: t-Butyl alcohol cannot be completely separated from water by conventional distillation or rectification because of the minimum boiling azeotrope. t-Butyl alcohol can be readily separated from water by using azeotropic or extractive distillation. Typical examples of effective agents are: by azeotropic distillation, vinyl n-butyl ether and propylene glycol dimethyl ether; by extractive distillation, 1,3-butanediol and triethylene glycol.
    Type: Grant
    Filed: February 21, 1991
    Date of Patent: January 28, 1992
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, Zuyin Yang
  • Separation of cyclohexane from cyclohexene by azeotropic or extractive distillation
    Patent number: 5069756
    Abstract: Cyclohexane cannot be readily separated from cyclohexene by conventional distillation or rectification because of the close proximity of their boiling points. Cyclohexane can be separated from cyclohexene by azeotropic or extractive distillation. Typical examples of effective agents are: for azeotropic; ethylene glycol methyl ether and n-butanol; for extractive; propylene glycol methyl ether and diacetone alcohol.
    Type: Grant
    Filed: November 26, 1990
    Date of Patent: December 3, 1991
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of methylene chloride from methylal by extractive distillation
    Patent number: 5051153
    Abstract: Methylal cannot be completely separated from methylene chloride by conventional distallation or rectification because of the maximum boiling azeotrope. Methylal can be readily separated from methylene chloride by extractive distillation. Typical effective agents are n-butyl acetate, diisobutyl ether and 4-methyl-2-pentanone.
    Type: Grant
    Filed: May 20, 1991
    Date of Patent: September 24, 1991
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of m-xylene from p-xylene or o-xylene by azeotropic distillation
    Patent number: 5039380
    Abstract: m-Xylene is difficult to separate from p-xylene or o-xylene by conventional distillation or rectification because of the close proximity of their boiling points. m-Xylene can be readily separated from p-xylene or o-xylene by using azeotropic distillation in which the agent is an aliphatic ester. Typical examples of effective agents are: for m-xylene from p-xylene, propyl butyrate or methyl valerate; for m-xylene from o-xylene, hexyl formate or methyl valerate.
    Type: Grant
    Filed: April 3, 1991
    Date of Patent: August 13, 1991
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • 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
  • Dehydration of formic acid by extractive distillation
    Patent number: 5006205
    Abstract: Formic acid cannot be completely removed from formic acid and water mixtures by distillation because of the presence of the maximum azeotrope. Formic acid can be readily removed from formic acid - water mixtures by extractive distillation in which the extractive agent is a mono carboxylic acid mixed with certain high boiling organic compounds. Examples of effective agents are: hexanoic acid and butyl benzoate; octanoic acid and nitrobenzene; heptanoic acid, benzyl benzoate and pelargonic acid.
    Type: Grant
    Filed: January 17, 1989
    Date of Patent: April 9, 1991
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, Kraig M. Wendt, Rudolph J. Szabados
  • Conversion of acetic acid into diketene and water using dimethylsulfoxide and pelargonic acid
    Patent number: 4996333
    Abstract: Acetic acid can be almost completely converted into diketene and water by heating it with a mixture of dimethylsulfoxide and pelargonic acid at 120.degree.-150.degree. C. for fifteen to thirty minutes.
    Type: Grant
    Filed: July 23, 1990
    Date of Patent: February 26, 1991
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • 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
  • Removal of sulfur from petroleum coke with lime
    Patent number: 4981667
    Abstract: The sulfur in petroleum pitches and cokes can be converted to calcium sulfate instead of sulfur dioxide during combustion when calcium oxide or calcium carbonate is added to the molten pitch before burning.
    Type: Grant
    Filed: April 13, 1990
    Date of Patent: January 1, 1991
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, John W. Berg
  • Recovery of triethylene glycol from triols by azeotropic distillation
    Patent number: 4980033
    Abstract: Triethylene glycol cannot be easily separated from glycerine or 1,2,4-butanetriol by atmospheric or reduced pressure distillation because of the closeness of their boiling points. Triethylene glycol can be readily separated from glycerine or 1,2,4-butanetriol by azeotropic distillation. Effective agents are p-xylene, alphapinene and diisobutyl ketone.
    Type: Grant
    Filed: September 4, 1990
    Date of Patent: December 25, 1990
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of lactate esters by extractive distillation
    Patent number: 4975157
    Abstract: The lower lactate esters are difficult to separate one from another by conventional distillation or rectification because of the close proximity of their boiling points. Lactate esters can be readily separated from each other by extractive distillation. Typical examples of effective agents are: for methyl lactate from ethyl lactate, ethylene glycol; ethyl lactate from isopropyl lactate, diethylene glycol; isopropyl lactate from n-propyl lactate, isophorone; n-propyl lactate from butyl lactate, 2-hydroxyacetophenone.
    Type: Grant
    Filed: July 12, 1990
    Date of Patent: December 4, 1990
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Recovery of glycerine from polyols by azeotropic distillation
    Patent number: 4975158
    Abstract: Glycerine cannot be easily separated from triethylene glycol and 1,2,4-butanetriol by atmospheric or reduced pressure distillation because of the closeness of their boiling points. Glycerine can be readily separated from triethylene glycol and 1,2,4-butanetriol by azeotropic distillation. Typical effective agents are m-xylene, dipentene and 2-methoxyethyl ether.
    Type: Grant
    Filed: April 6, 1990
    Date of Patent: December 4, 1990
    Assignee: Lloyd Bert
    Inventor: Lloyd Berg
  • Separation of 2-methyl-butanol-1 from pentanol-1 by extractive distillation
    Patent number: 4969977
    Abstract: 2-Methyl butanol-1 cannot be completely removed from 2-methyl butanol-1-pentanol-1 mixtures by distillation because of the proximity of their boiling points. 2-methyl butanol-1 can be readily removed from mixtures of these alcohols by using extractive distillation in which the extractive agent is a mixture of aromatic carboxylic acids or aromatic carboxylic esters. Typical examples of effective agents are: benzoic acid, ethyl salicylate and salicylic acid; methyl benzoate, methyl p-hydroxy benzoate and phenyl salicylate.
    Type: Grant
    Filed: January 30, 1989
    Date of Patent: November 13, 1990
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Recovery of ethylene glycol from butanediol isomers by azeotropic distillation
    Patent number: 4966658
    Abstract: Ethylene glycol cannot be easily separated from 1,2-butanediol or 1,3-butanediol by atmospheric or reduced pressure distillation because of the closeness of their boiling points. Ethylene glycol can be readily separated from the butanediols by azeotropic distillation. Typical effective agents are ethyl benzene, 3-heptanone or diisobutyl ketone.
    Type: Grant
    Filed: July 5, 1990
    Date of Patent: October 30, 1990
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of styrene from ethyl benzene or o-xylene by azeotropic or extractive distillation with esters
    Patent number: 4966656
    Abstract: Styrene cannot be easily removed from ethyl benzene or o-xylene by distillation because of the closeness of their boiling points. Styrene can be readily separated from ethyl benzene or o-xylene by means of azeotropic or extractive distillation using certain esters. Typical effective agents are ethyl isovalerate, propyl caproate, butyl propionate and hexyl formate.
    Type: Grant
    Filed: June 4, 1990
    Date of Patent: October 30, 1990
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of styrene from ethyl benzene by extractive distillation
    Patent number: 4959128
    Abstract: Ethyl benzene cannot be easily removed from styrene by distillation because of the closeness of their boiling points. Ethyl benzene can be readily separated from styrene by means of extractive distillation using certain nitrogenous organic compounds. Typical effective agents are adiponitrile, methyl glutaronitrile and nitrobenzene.
    Type: Grant
    Filed: February 26, 1990
    Date of Patent: September 25, 1990
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • 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
  • Separation of formic acid from dioxane by extractive distillation with amides
    Patent number: 4948469
    Abstract: Dioxane cannot be completely removed from dioxane and formic acid mixtures by distillation because of the presence of the maximum azeotrope. Dioxane can be readily removed from dioxane - formic acid mixtures by extractive distillation in which the extractive agent is dimethylformamide, dimethylacetamide or these with certain high boiling organic compounds.
    Type: Grant
    Filed: December 5, 1988
    Date of Patent: August 14, 1990
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, Richard R. Rall
  • Separation of 2,3-butanediol from propylene glycol by azeotropic distillation
    Patent number: 4935102
    Abstract: A complex mixture of polyols cannot be easily separated by atmospheric or reduced pressure distillation because of the closeness of their boiling points. A mixture of polyols can be readily separated by azeotropic distillation. Typical effective agents are: p-xylene for propylene glycol from 2,3-butanediol and 1,2-butanediol; diisobutyl ketone for ethylene glycol from 1,2-butanediol and 1,3-butanediol; dipentene for glycerine from triethylene glycol and 1,2,4-butanetriol; propylene glycol isobutyl ether for 2,3-butanediol from propylene glycol.
    Type: Grant
    Filed: December 27, 1989
    Date of Patent: June 19, 1990
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg