Patents by Inventor Ponnampalam Elankovan

Ponnampalam Elankovan 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).

  • Patent number: 7238837
    Abstract: The invention provides a process for the recovery of lactic acid from aqueous solutions containing at least one water-soluble lactate salt and having a pH of about between 4 and 14, comprising the steps of: contacting said aqueous solution with a cation exchanger which is at least partially in its acid form, said cation exchanger being water immiscible in both acid and salt form, whereby ion exchange is effected, protons are transferred from the cation exchanger to the aqueous solution to acidulate it and to form lactic acid therein and cations from the aqueous solution are bound by the cation exchanger; reacting the cations carrying cation exchanger to convert it into a cation exchanger which is at least partially in its acid form and to a second product, which second product is basic and comprises the cation of the salt; and recovering lactic acid from the lactic acid-containing acidulated aqueous solution by methods known per se.
    Type: Grant
    Filed: October 2, 1997
    Date of Patent: July 3, 2007
    Inventors: Aharon Meir Eyal, Ponnampalam Elankovan
  • Patent number: 5525365
    Abstract: A method for processing food, and particularly fruit, wherein the leaching discharge stream is separated, for example by desalting electrodialysis, into reusable brine and residual solutions. First, the fruit is brined using conventional techniques. The fruit is then leached or flushed with water to reduce the concentration of brine materials. The discharge stream from the leaching process is separated into a sugar solution and a brine solution, preferably through desalting electrodialysis. The dilute sugar solution is returned to the leaching process to return the natural sugar and color to the fruit. The brine solution preferably is returned to the brining process.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: June 11, 1996
    Assignees: Gray & Company, Michigan Biotechnology Institute
    Inventor: Ponnampalam Elankovan
  • Patent number: 5034105
    Abstract: A process for preparing a carboxylic acid of high purity comprises preparing an undersaturated solution of a salt of the carboxylic acid; subjecting the undersaturated salt solution to water-splitting electrodialysis to form base and a supersaturated solution of the carboxylic acid; and, then crystallizing the carboxylic acid from the supersaturated solution. In the preferred embodiment, the undersaturated solution is a fermentation broth containing sodium succinate and the carboxylic acid obtained is succinic acid.
    Type: Grant
    Filed: July 27, 1989
    Date of Patent: July 23, 1991
    Assignee: Michigan Biotechnology Institute
    Inventors: Kris A. Berglund, Ponnampalam Elankovan, David A. Glassner