Patents Assigned to Lloyd Bert
  • 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