06552295 is referenced by 30 patents.

A method and apparatus for plasma waste disposal of hazardous waste material, where the hazardous material is volatilized under vacuum inside a containment chamber to produce a pre-processed gas as input to a plasma furnace including a plasma-forming region in which a plasma-forming magnetic field is produced. The pre-processed gas is passed at low pressure and without circumvention through the plasma-forming region and is directly energized to an inductively coupled plasma state such that hazardous waste reactants included in the pre-processed gas are completely dissociated in transit through the plasma-forming region. Preferably, the plasma-forming region is shaped as a vacuum annulus and is dimensioned such that there is no bypass by which hazardous waste reactants in the pre-processed gas can circumvent the plasma-forming region. The plasma furnace is powered by a high frequency power supply outputting power at a fundamental frequency. The power supply contains parasitic power dissipation mechanisms to prevent non-fundamental, parasitic frequencies from destabilizing the fundamental frequency output power. These power loss mechanisms use either distributed resistance or frequency-selective power-loss devices to prevent parasitic oscillations from instantaneously turning on the high frequency power oscillator at non-fundamental frequencies.

Title
Plasma furnace disposal of hazardous wastes
Application Number
9/739748
Publication Number
6552295 (B2)
Application Date
December 20, 2000
Publication Date
April 22, 2003
Inventor
Raymond Thomas
Chapel Hill
NC, US
Robert C Hendry
Hillsborough
NC, US
John B Posthill
Chapel Hill
NC, US
Robert J Markunas
Chapel Hill
NC, US
Agent
Oblon Spivak McClelland Maier & Neustadt P C
US
Assignee
Research Triangle Institute
NC, US
IPC
B23K 10/00
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