Gold Refining and Parting
Gold parting is primarily the removing of silver from gold and therefore increasing the purity of gold. The parting of gold from silver has been done since ancient times starting in Lydia in the 6th century BC. Various techniques have been practised; salt cementation from ancient times, parting using distilled mineral acids from medieval times, and in modern times using chlorination using the Miller process and electrolysis using the Wohlwill process.
Read more about this topic: Gold Extraction
Famous quotes containing the words gold, refining and/or parting:
“There is, of course, a gold mine or a buried treasure on every mortgaged homestead. Whether the farmer ever digs for it or not, it is there, haunting his daydreams when the burden of debt is most unbearable.”
—Fawn M. Brodie (1915–1981)
“Involuntary mental hospitalization is like slavery. Refining the standards for commitment is like prettifying the slave plantations. The problem is not how to improve commitment, but how to abolish it.”
—Thomas Szasz (b. 1920)
“Is all the counsel that we two have shared,
The sisters’ vows, the hours that we have spent
When we have chid the hasty-footed time
For parting us—O, is all forgot?
All schooldays’ friendship, childhood innocence?”
—William Shakespeare (1564–1616)