Patents Assigned to AAPA Trust
  • Method and apparatus for introducing sulphur dioxide into aqueous solutions
    Patent number: 6689326
    Abstract: This invention presents a sulphurous acid generator which employs a combination of novel blending, contact and mixing mechanisms which injects sulphur gases into aqueous solution or which maximize the efficiency and duration of contact between sulphur dioxide gas and water or aqueous solution to form sulphurous acid in an open nonpressurized system, without employing a countercurrent absorption tower. The present invention also incorporates a novel high temperature concrete for use in constructing portions of the present invention.
    Type: Grant
    Filed: October 27, 2000
    Date of Patent: February 10, 2004
    Assignee: AAPA Trust
    Inventor: Edward W. Jackson
  • Open system sulphurous acid generator
    Patent number: 6506347
    Abstract: This invention presents a sulphurous acid generator which employs a combination of novel blending, contact and mixing mechanisms which maximize the efficiency and duration of contact between sulphur dioxide gas and water to form sulphurous acid in an open nonpressurized system, without employing a countercurrent absorption tower. The present invention also incorporates a novel high temperature concrete for use in constructing portions of the present invention.
    Type: Grant
    Filed: August 21, 2000
    Date of Patent: January 14, 2003
    Assignee: AAPA Trust
    Inventor: Edward W. Jackson