Precious metal recovery
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United States of America Patent
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Sep 13, 2016
Grant Date -
Mar 3, 2016
app pub date -
Apr 16, 2014
filing date -
Apr 17, 2013
priority date (Note) -
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Abstract
A process for treating an off-gas from the thermal processing of a precious-metal-containing feedstock, the process comprising cooling the off-gas to a temperature of from 300 to 500° C.; passing the cooled off-gas through a first particulate filter to recover particulate material; and dosing the off-gas from the first particulate filter with a sorbent material and passing the dosed off-gas through a second particulate filter; wherein at least a portion of the particulate material recovered from the first particulate filter is recycled into the thermal processing of the precious-metal-containing feedstock.
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