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 tetrachloroethylene from a butyl alcohol by extractive distillation
    Patent number: 5160585
    Abstract: Tetracholorethylene cannot be completely separated from n-butanol, isobutanol or 2-butanol by conventional distillation or rectification because of minimum boiling azeotropes. Tetrachloroethylene can be readily separated from n-butanol, isobutanol or 2-butanol by extractive distillatiion. Typical effective agents are: for n-butanol, dipropylene glycol methyl ether; for isobutanol, dimethylsulfoxide and isobutyl butyrate; for 2-butanol, ethylene glycol methyl ether and isobornyl acetate.
    Type: Grant
    Filed: July 23, 1991
    Date of Patent: November 3, 1992
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Dehydration of acetic acid by azeotropic distillation
    Patent number: 5160412
    Abstract: Acetic acid is difficult to separate from water by conventional distillation or rectification because of the close proximity of their boiling points. Acetic acid can be readily separated from water by using azeotropic distillation. Typical examples of effective agents are ethyl n-valerate and 4-methyl-2-pentanone.
    Type: Grant
    Filed: March 10, 1992
    Date of Patent: November 3, 1992
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Dehydration of acrylic acid by extractive distillation
    Patent number: 5154800
    Abstract: Acrylic acid cannot be completely separated from water by conventional distillation or rectification because of the minimum boiling azeotrope. Acrylic acid can be readily separated from water by extractive distillation. Effective agents are dimethylsulfoxide, sulfolane, dimethylformamide or dimethylacetamide.
    Type: Grant
    Filed: January 31, 1992
    Date of Patent: October 13, 1992
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of methylene chloride from the lower alcohols by extractive distillation
    Patent number: 5152876
    Abstract: Methylene chloride cannot be completely separated from methanol or ethanol by conventional distillation or rectification because of the mimimum boiling azeotrope. Methyelne chloride can be readily separated from methanol or ethanol by azeotropic or extractive distillation. Typical effective agents are: for methanol by azeotropic distillation, isopropanol or t-butanol; by extractive distillation, 1-nitropropane or n-butanol; for ethanol by extractive distillation, isobutanol or n-propyl acetate.
    Type: Grant
    Filed: March 27, 1991
    Date of Patent: October 6, 1992
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, Zuyin Yang
  • Dehydration of 2-methoxyethanol by extractive distillation
    Patent number: 5151160
    Abstract: 2-Methoxyethanol cannot be completely separated from water by conventional distillation or rectification because of the minimum boiling azeotrope. 2-Methoxyethanol can be readily separated from water by extractive distillation. Effective agents are dimethylsulfoxide, sulfolane, dimethylformamide or 1,4-butanediol.
    Type: Grant
    Filed: April 6, 1992
    Date of Patent: September 29, 1992
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of ketone isomers by extractive distillation
    Patent number: 5147512
    Abstract: The higher boiling ketone isomers are difficult to separate one from another by conventional distillation or rectification because of the close proximity of their boiling points. Ketone isomers can be readily separated from each other by extractive distillation. Typical examples of effective agents are: for 3-pentanone from 2-pentanone, dipropylene glycol; 3-hexanone from 2-hexanone, butoxypropanol; 3-heptanone from 2-heptanone, 50% ethylene glycol--50% butoxypropanol; 3-octanone from 2-octanone, ethylene glycol diacetate.
    Type: Grant
    Filed: June 28, 1991
    Date of Patent: September 15, 1992
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, Thomas A. Edison
  • Separation of chloroform from a lower alcohol by extractive distillation
    Patent number: 5131985
    Abstract: Chloroform cannot be completely separated from methanol, ethanol or isopropanol by conventional distillation or rectification because of the minimum boiling azeotrope between chloroform and the alcohols. Chloroform can be readily separated from methanol, ethanol or isopropanol by extractive distillation. Typical effective agents are: for methanol, isopropanol or 4-methyl-2-pentanone; for ethanol, n-butanol or isobutyl acetate; for isopropanol, butyl acetate or ethylene glycol ethyl ether.
    Type: Grant
    Filed: June 3, 1991
    Date of Patent: July 21, 1992
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, Zuyin Yang
  • Dissolution of coal with petroleum pitch
    Patent number: 5125932
    Abstract: A meltable pumpable homogeneous carbonaceous mixture is produced by mixing powdered coal into molten petroleum pitch.
    Type: Grant
    Filed: September 30, 1991
    Date of Patent: June 30, 1992
    Assignee: Lloyd Berg
    Inventors: John C. Orth, Lloyd Berg
  • Separation of methylene chloride from ethyl vinyl ether by extractive distillation
    Patent number: 5124005
    Abstract: Methylene chloride cannot be completely separated from ethyl vinyl ether by conventional distillation or rectification because of the minimum boiling azeotrope. Methylene chloride can be readily separated from ethyl vinyl ether by extractive distillation. Typical effective agents are ethylene glycol methyl ether acetate, 2-hexanone and 1-nitropropane.
    Type: Grant
    Filed: April 25, 1991
    Date of Patent: June 23, 1992
    Assignee: Lloyd Berg
    Inventors: Zuyin Yang, Lloyd Berg
  • Separation of trichloroethylene from a butyl alcohol by extractive distillation
    Patent number: 5118392
    Abstract: Trichloroethylene cannot be completely separated from n-butanol, isobutanol, 2-butanol or t-butanol by conventional distillation or rectification because of the minimum boiling azeotropes. Trichloroethylene can be readily separated from n-butanol, isobutanol, 2-butanol or t-butanol by extractive distillation. Typical effective agents are: for n-butanol, dimethylsulfoxide; for isobutanol, n-octanol; for 2-butanol, 2-methyl-1-pentanol and for t-butanol, n-butyl acetate.
    Type: Grant
    Filed: July 25, 1991
    Date of Patent: June 2, 1992
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of 1,1,1-trichloroethane from N-hexane by extractive distillation
    Patent number: 5106460
    Abstract: 1,1,1-Trichloroethane cannot be completely separated from n-hexane by conventional distillation or rectification because of the minimum boiling azeotrope. 1,1,1-Trichloroethane can be readily separated from n-hexane by extractive distillation. Typical effective agents are: methyl isoamyl ketone, amyl acetate and isobutanol.
    Type: Grant
    Filed: September 9, 1991
    Date of Patent: April 21, 1992
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of p-menthane from p-cymene by extractive distillation
    Patent number: 5106459
    Abstract: p-Cymene and p-menthane are difficult to separate one from another by conventional distillation or rectification because of the close proximity of their boiling points. p-Cymene and p-menthane can be readily separated one from another by using azeotropic or extractive distillation. Typical examples of effective agents, for azeotropic distillation: diethyelene glycol ethyl ether, 1-pentanol and isobutanol; for extractive distillation: butyl benzoate, undecyl alcohol and methyl benzoate.
    Type: Grant
    Filed: December 14, 1990
    Date of Patent: April 21, 1992
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of pyridine from water by extractive distillation
    Patent number: 5100514
    Abstract: Pyridine cannot be completely separated from water by conventional distillation or rectification because of the minimum boiling azeotrope. Pyridine can be readily separated from water by using azeotropic or extractive distillation. Typical examples of effective agents are: by azeotropic distillation, methyl isoamyl ketone and propylene glycol dimethyl ether; by extractive distillation, isophorone and sulfolane.
    Type: Grant
    Filed: March 1, 1991
    Date of Patent: March 31, 1992
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, Zuyin Yang
  • Separation of m-xylene from p-xylene or o-xylene by extractive distillation with alcohols
    Patent number: 5094723
    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 extractive distillation in which the agent is an alcohol. Typical examples of effective agents are: for m-xylene from o-xylene, 1-octanol and cyclododecanol; for p-xylene from m-xylene, diisobutyl carbinol and cyclododecanolphenethyl alcohol mixture.
    Type: Grant
    Filed: January 2, 1991
    Date of Patent: March 10, 1992
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of methylene chloride from the lower formates by extractive distillation
    Patent number: 5094724
    Abstract: Methylene chloride cannot be completely separated from methyl formate or ethyl formate by conventional distillation or rectification because of the minimum boiling azeotrope. Methylene chloride can be readily separated from methyl formate or ethyl formate by extractive distillation. Typical effective agents are: for methyl formate, n-butyl acetate and 3-hexanone; for ethyl formate, isobornyl acetate and 2-heptanone.
    Type: Grant
    Filed: April 19, 1991
    Date of Patent: March 10, 1992
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, Zuyin Yang
  • Separation of m-xylene from o-xylene by extractive distillation with esters
    Patent number: 5094725
    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 agent is an aliphatic ester. Typical examples of effective agents are diethyl maleate, diethyl malonate or 2-ethyl hexyl acetate.
    Type: Grant
    Filed: April 4, 1991
    Date of Patent: March 10, 1992
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • 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 methylene chloride from ethyl ether by extractive distillation
    Patent number: 5092966
    Abstract: Ethyl ester cannot be completely separated from methylene chloride by conventional distillation or rectification because of the maximum boiling azeotrope. Ethyl ether can be readily separated from methylene chloride by extractive distillation. Typical effective agents are t-butyl alcohol, n-propyl acetate or propoxypropanol.
    Type: Grant
    Filed: April 1, 1991
    Date of Patent: March 3, 1992
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, Zuyin Yang
  • Separation of p-xylene from m-xylene by extractive distillation
    Patent number: 5091059
    Abstract: p-Xylene is difficult to separate from m-xylene by conventional distillation or rectification because of the close proximity of their boiling points. p-Xylene can be readily separated from m-xylene by using extractive distillation in which the agent is an ester. Typical examples of effective agents are butyl butyrate, methyl caproate and methyl heptanoate.
    Type: Grant
    Filed: October 22, 1991
    Date of Patent: February 25, 1992
    Assignee: Lloyd Berg
    Inventor: Lloyd Berg
  • Separation of the propyl alcohols from water by azeotropic or extractive distillation
    Patent number: 5085739
    Abstract: Isopropanol and n-propanol cannot be completely separated from water by conventional distillation or rectification because of the minimum boiling azeotrope. Isopropanol and n-propanol can be readily separated from water by using azeotropic or extractive distillation. Typical examples of effective agents are: for isopropanol by azeotropic distillation, vinyl n-butyl ether; by extractive distillation, polyethylene glycol; for n-propanol by azeotropic distillation, amyl formate; by extractive distillation, n-butyl acetate.
    Type: Grant
    Filed: January 30, 1991
    Date of Patent: February 4, 1992
    Assignee: Lloyd Berg
    Inventors: Lloyd Berg, Zuyin Yang