Patents Assigned to Lloyd Berg
  • 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 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 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 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
  • 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