Patents by Inventor Carl Frederick Leitten

Carl Frederick Leitten 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).

  • Method for improving separation of carbohydrates from wood pulping and wood or biomass hydrolysis liquors
    Patent number: 7699958
    Abstract: A method for separating carbohydrates from pulping liquors includes the steps of providing a wood pulping or wood or biomass hydrolysis pulping liquor having lignin therein, and mixing the liquor with an acid or a gas which forms an acid upon contact with water to initiate precipitation of carbohydrate to begin formation of a precipitate. During precipitation, at least one long chain carboxylated carbohydrate and at least one cationic polymer, such as a polyamine or polyimine are added, wherein the precipitate aggregates into larger precipitate structures. Carbohydrate gel precipitates are then selectively removed from the larger precipitate structures. The method process yields both a carbohydrate precipitate and a high purity lignin.
    Type: Grant
    Filed: November 27, 2006
    Date of Patent: April 20, 2010
    Assignee: UT-Battelle, LLC
    Inventors: William Louis Griffith, Alicia Lucille Compere, Carl Frederick Leitten, Jr.
  • METHOD FOR IMPROVING SEPARATION OF CARBOHYDRATES FROM WOOD PULPING AND WOOD OR BIOMASS HYDROLYSIS LIQUORS
    Publication number: 20080121356
    Abstract: A method for separating carbohydrates from pulping liquors includes the steps of providing a wood pulping or wood or biomass hydrolysis pulping liquor having lignin therein, and mixing the liquor with an acid or a gas which forms an acid upon contact with water to initiate precipitation of carbohydrate to begin formation of a precipitate. During precipitation, at least one long chain carboxylated carbohydrate and at least one cationic polymer, such as a polyamine or polyimine are added, wherein the precipitate aggregates into larger precipitate structures. Carbohydrate gel precipitates are then selectively removed from the larger precipitate structures. The method process yields both a carbohydrate precipitate and a high purity lignin.
    Type: Application
    Filed: November 27, 2006
    Publication date: May 29, 2008
    Inventors: William Louis Griffith, Carl Frederick Leitten, Alicia Lucille Compere