METHOD OF PROCESSING POLYCRYSTALLINE DIAMOND MATERIAL
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United States of America Patent
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Issued Date -
Dec 4, 2014
app pub date -
Dec 20, 2012
filing date -
Dec 29, 2011
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Abandoned
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Abstract
A method of processing a polycrystalline diamond (PCD) material having a non-diamond phase comprising a diamond catalyst/solvent material comprises leaching an amount of the diamond catalyst/solvent from the PCD material by exposing at least a portion of the PCD material to a leaching mixture. The leaching mixture comprises hydrochloric acid and one or more additional mineral acids, the molar concentration of the hydrochloric acid being greater than the molar concentration of the one or more additional mineral acids in the leaching mixture.
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