Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Reexamination Certificate
2010-07-15
2011-10-25
Wyszomierski, George (Department: 1733)
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
C075S739000, C075S740000, C075S743000, C423S027000, C423S034000, C423S053000, C423S055000, C423S087000, C588S315000, C588S318000
Reexamination Certificate
active
08043399
ABSTRACT:
A method for detoxifying spent CCA (copper, chromium, arsenic) treated wood, from which CCA is efficiently removed from the wood, allowing both the CCA and the wood to be reused has been developed. The method comprises the steps of (1) microwave-enhanced acid extraction of CCA, (2) separation of the acid-containing CCA solution from the wood, (3) separation/precipitation of CCA from the acid extract, (4) recovery and regeneration of CCA-bearing precipitant for reuse in the wood preservation industry, (5) recycling recovered acid solution, (6) microwave-assisted liquefaction of the extracted wood, and (7) use of detoxified liquefied wood to form polymeric materials such as polyurethanes and phenolic resin adhesives. The recovered CCA may be used to treat wood. The recovered acids may be used to extract CCA from CCA-treated wood, and the liquefied wood may be used as phenolic or polyurethane resins.
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Hse Chung-Yun
Pan Hui
Shupe Todd Finley
Yu Bin
Board of Supervisors of Louisiana State University and Agricultu
Carver James C.
McGuthry Banks Tima M
The Carver Law Firm
Wyszomierski George
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