parting

parting
/pahr"ting/, n.
1. the act of a person or thing that parts.
2. a division or separation.
3. a place of division or separation.
4. a departure or leave-taking.
5. death.
6. something that serves to part or separate things.
7. Mineral. a fracture of a crystal along a plane determined by twinning or pressure rather than along a cleavage plane.
8. Metall. See parting line.
adj.
9. given, happening, taken, done, etc., at parting: a parting glance.
10. of or pertaining to parting, leave-taking, departure, or death: parting words.
11. ending or taking leave: the parting day.
12. dying.
13. dividing or separating.
[1250-1300; ME partyng (ger.). See PART, -ING1, -ING2]

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In metallurgy, the separation of gold and silver by chemical or electrochemical means.

Gold and silver are often extracted together from the same ores or recovered as by-products from the extraction of other metals. A solid mixture of the two, known as bullion or doré, can be parted by boiling in nitric acid. The silver is dissolved as silver nitrate, leaving a gold residue that is filtered off and washed; silver is precipitated out of solution by adding ferrous sulfate. This is the traditional method used in assaying the content of gold and silver samples.

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      in metallurgy, the separation of gold (gold processing) and silver (silver processing) by chemical or electrochemical means. Gold and silver are often extracted together from the same ores or recovered as by-products from the extraction of other metals. A solid mixture of the two, known as bullion, or doré, can be parted by boiling in nitric acid. The silver is dissolved as silver nitrate, leaving a residue of gold that is filtered off and washed; silver is precipitated out of solution by the addition of ferrous sulfate. This is the traditional method used in assaying the content of gold and silver samples.

      Most gold and silver are parted electrolytically after being recovered in the slimes left over from copper refining or as a metallic by-product of lead or zinc smelting. The bullion is cast into anodes, which are placed into an electrolytic cell and subjected to an electric current. Silver dissolves in the electrolyte and then deposits onto the cathodes. Gold and trace amounts of silver are recovered in the slimes and are parted either electrolytically or by boiling in sulfuric acid and potassium nitrate to dissolve the silver.

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Universalium. 2010.

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Look at other dictionaries:

  • Parting — Par ting (p[aum]rt [i^]ng), a. [From {Part}, v.] 1. Serving to part; dividing; separating. [1913 Webster] 2. Given when departing; as, a parting shot; a parting salute. Give him that parting kiss. Shak. [1913 Webster] 3. Departing. Speed the… …   The Collaborative International Dictionary of English

  • Parting — Par ting (p[aum]rt [i^]ng), n. 1. The act of parting or dividing; the state of being parted; division; separation. The parting of the way. Ezek. xxi. 21. [1913 Webster] 2. A separation; a leave taking. Shak. [1913 Webster] And there were sudden… …   The Collaborative International Dictionary of English

  • Parting — may refer to one of the following:*Departure *Farewell *Parting traditions *Cleavage (crystal) …   Wikipedia

  • parting — [adj] farewell departing, final, goodbye, last, valedictory; concept 267 Ant. greeting, introductory parting [n] goodbye, separation adieu, bisection, break, breaking, breakup, crossroads*, departure, detachment, divergence, division, farewell,… …   New thesaurus

  • parting — ► NOUN 1) the action or an act of parting. 2) Brit. a line of scalp revealed by combing the hair away in opposite directions on either side …   English terms dictionary

  • parting — [pärt′iŋ] adj. 1. dividing; separating 2. departing 3. given, spoken, done, etc. at parting n. 1. the act of breaking, dividing, or separating 2. a place of division or separation; dividing point or line 3. something that separates or divides …   English World dictionary

  • Parting — Parting. См. Разделение. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) …   Словарь металлургических терминов

  • parting — index divergent, division (act of dividing), egress, estrangement, leave (absence), rift (disagreement) …   Law dictionary

  • parting — part|ing1 [ˈpa:tıŋ US ˈpa:r ] n 1.) [U and C] an occasion when two people leave each other ▪ an emotional parting at the airport ▪ the moment of parting on parting ▪ He gave her a light kiss on parting. 2.) BrE the line on your head made by… …   Dictionary of contemporary English

  • parting — [[t]pɑ͟ː(r)tɪŋ[/t]] partings 1) N VAR Parting is the act of leaving a particular person or place. A parting is an occasion when this happens. Parting from any one of you for even a short time is hard... It was a dreadfully emotional parting. 2)… …   English dictionary

  • parting — {{Roman}}I.{{/Roman}} noun ADJECTIVE ▪ final ▪ amicable ▪ It was an amicable parting and we greatly value the years we spent together. ▪ bitter ▪ The divorce was a bitter parting that …   Collocations dictionary

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