Patents by Inventor Carlos Roberto Xavier

Carlos Roberto Xavier 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: 6368413
    Abstract: Disclosed is a process for preparing an improved sugar product comprising (a) providing a raw sugar solution having color of 50 to 1,000 Icumsa units and a concentration of 10 to 70 Brix; (b)(1) injecting ozone into the raw sugar solution while imparting agitation to the solution effective to reduce the size of said color-imparting particles into smaller particles, and then (b)(2) discontinuing said injection, but continuing said agitation for a period of time in excess of the duration of step (b)(1), wherein said smaller particles react with ozone, and (c) optionally repeating steps (b)(1) and (b)(2) at least once, wherein the solution is at no point subjected to a precipitation or carbonation step.
    Type: Grant
    Filed: July 26, 2000
    Date of Patent: April 9, 2002
    Assignees: Praxair Technology, Inc., Dulcini S/A
    Inventors: Philippe Georges Charlet, Jorge Luiz Colodette, Carlos Roberto Xavier, Julio Cesar Mascioli
  • Patent number: 6159302
    Abstract: Methods and compositions for clarifying sugar are disclosed. Compositions of a condensation polymer of a dihaloalkyl compound and a dialkylamine compound and a phosphate compound are effective at clarifying the sugar syrup during its production as well as reducing the total amount of phosphate used.
    Type: Grant
    Filed: January 13, 1999
    Date of Patent: December 12, 2000
    Assignee: BetzDearborn Inc.
    Inventors: Carlos Roberto Xavier, Claudio Candido Luiz, Luiz Antonio Fernandes
  • Patent number: 6146465
    Abstract: An improved process for clarifying sugar syrup in the flotation system of a sugar making operation. Neutral phosphate-based compounds are added to the flotation system to aid in clarifying the sugar syrup. The use of the neutral phosphate-based compounds will eliminate the use of phosphoric acid and the commensurate need for neutralizing chemical as well as elimination of the tanks for phosphoric acid and neutralizing chemical mixing at field installations.
    Type: Grant
    Filed: January 13, 1999
    Date of Patent: November 14, 2000
    Assignee: Betzdearborn Inc.
    Inventors: Carlos Roberto Xavier, Claudio Candido Luiz, Luiz Antonio Fernandes