Patents by Inventor Richard E. Fuller

Richard E. Fuller 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 recovery of reusable chemicals from C10.sub.2 generator effluent
    Patent number: 4483740
    Abstract: Method for the recovery of acidic effluent from pulp mill chlorine dioxide generators using the Mathieson or Solvay system. The spent generator acid is directed through a three-stage evaporation/crystallization process in which spent acid from the generator is evaporated and crystallized to produce stage 1 sodium bisulfate crystals. The first stage crystals are then redissolved to form a second solution which is crystallized in order to yield stage 2 sodium sesquisulfate crystals and, finally, the second stage crystals are redissolved in a third stage evaporation/crystallization stage to yield sodium sulfate crystals. Besides salt cake, the system also produces reusable sulfuric acid for the chlorine dioxide generator. No chemicals are added during the recovery steps.
    Type: Grant
    Filed: August 3, 1983
    Date of Patent: November 20, 1984
    Assignee: A. H. Lundberg Associates, Inc.
    Inventors: John R. Parkinson, Richard E. Fuller, Bruce Der