Patents by Inventor Tal Reuveni

Tal Reuveni 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).

  • Process for the preparation of long-chain alkylglycosides
    Patent number: 6274349
    Abstract: The invention provides a process for the preparation of long-chain alkyl glycosides, comprising reacting at least one substrate selected from a group consisting a carbohydrates and carbohydrates sources and at least one fatty alkanol of at least eight carbon atoms in a medium consisting of at least one glycosidase enzyme having a temperature optimum greater than 60° C. and having thermal stability half-life of greater than 24 hours at 80° C.
    Type: Grant
    Filed: August 23, 1999
    Date of Patent: August 14, 2001
    Assignee: Yissum Research Development Company of the Hebrew University of Jerusalem
    Inventors: Aharon Meir Eyal, Asher Vitner, Tal Reuveni
  • Process for the production of erythorbic acid
    Patent number: 6172242
    Abstract: The invention provides a process for the recovery of erythorbic acid from an aqueous feed solution containing values of erythorbic acid at a concentration of less than 0.7 mol/kg, comprising extracting said erythorbic acid with a water-immiscible organic extractant composition comprising at least one secondary or tertiary alkyl amine in which the aggregate number of carbon atoms is at least 20, as a primary extractant, and a polar extraction enhancer compound; wherein said extractant composition comprises at least 2 moles of said polar extraction enhancer compound per one mole of primary extractant; separating said erythorbic acid-containing organic extractant composition from residual aqueous solution, and subjecting said erythorbic acid-containing organic extractant composition to a stripping operation with aqueous solution at a temperature of at least 20° C.
    Type: Grant
    Filed: April 22, 1999
    Date of Patent: January 9, 2001
    Assignee: Yissum Research Development Company of the Hebrew University of Jerusalem
    Inventors: Aharon Meir Eyal, Asher Vitner, Tal Reuveni, Betty Hazan
  • Process for the production of erythorbic acid
    Patent number: 5859262
    Abstract: The invention provides a process for the recovery of erythorbic acid from an aqueous feed solution containing values of erythorbic acid at a concentration of less than 0.7 mol/kg, comprising adsorbing a major portion of said erythorbic acid with a solid phase adsorbent resin selected from resins carrying a pyridine function and resins of similar or weaker basicity; separating said erythorbic acid-containing resin from residual aqueous solution, and subjecting said erythorbic acid-containing resin to a desorbing operation with a neutral solvent at a temperature of at least 20.degree. C. higher than the temperature at which said adsorption is carried out, whereby there is obtained a solution of erythorbic acid in solvent in which the concentration of erythorbic acid is at least equal to its concentration in said aqueous feed solution.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: January 12, 1999
    Assignee: Yissum Research Development Company
    Inventors: Aharon Meir Eyal, Asher Vitner, Tal Reuveni, Betty Hazan