Chemical agents for leaching polycrystalline diamond elements
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United States of America Patent
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May 7, 2013
Grant Date -
Jun 21, 2012
app pub date -
Jun 24, 2011
filing date -
Dec 21, 2010
priority date (Note) -
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Abstract
The disclosure provides to a PDC element protective system including a mask configured to protect a non-leached portion of a leached polycrystalline diamond compact (PDC) element during a leaching process. The mask may be formed from or coated with polytetrafluoroethylene (PTFE). The disclosure also provides a leaching system containing such a mask and a leaching vessel as well as methods of using the protective and leaching systems. The disclosure further provides a Lewis acid-based leaching agent and methods of its use. Finally, the disclosure provides a method of recycling a PDC or carbide element using a Lewis acid-based leaching agent.
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