Patents Assigned to Minerals Technology Inc.
  • Method for reducing thermal and light-induced brightness reversion in lignin-containing pulps
    Patent number: 5360515
    Abstract: A method and article of manufacture thereof is provided for reducing brightness reversion in bleached lignin-containing pulps or newsprint by the treatment of the bleached lignin-containing pulp or newsprint with 2,5-dihydroxydioxane. In one embodiment, calcium carbonate is added to enhance the activity of 2,5-dihydroxydioxane.
    Type: Grant
    Filed: August 25, 1993
    Date of Patent: November 1, 1994
    Assignees: The Research Foundation of the State University of New York, Minerals Technology Inc.
    Inventors: Raymond C. Francis, Daniel B. Evans