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For composition exactly at C, only a solid of eutectic (2.6% Ag + 97.4% Pb)
composition crystallizes out. This eutectic of Pb and Ag melts exactly at 303°C.
14.4.4 Desilverisation of Lead Pattinson's Process A knowledge of the phase
diagram of ...
2
The Metallurgy of Lead & Silver: Lead.- pt.II. Silver
Arsenic, Com unds ofin the lead blast furnace, 129. in roasting, 76. influencing
desilverisation, 275. interfering with Parkes process,305. ,, ,, Pattinson process,
296. skimmings, 28!. Ashcroft electrolytic process, 268. ,, ,, Difficulties of, 270. ,,
zinc ...
Henry Francis Collins, 1899
3
A Practical Treatise on Metallurgy, Adapted from the Last ...
At Tarnowitz* (Hungary), experiments were made to de- silverise raw lead
containing 1£ or 2 ozs. of silver by this method, and 1£ per cent of zinc was
required to effect this desilverisation ; the remaining lead contained o-0o8 of an
oz. of silver.
G.R.B. Kerl, Ernst Otto Röhrig, William Crookes, 1868
4
A Practical Treatise on Metallurgy: Copper, iron
Extraction of Copper at the Desilverisation of Matt. At 0eblarn,* in Upper Styria, a
mixture of copper pyrites, fallow ore, and red silver ore, containing 1 per cent of
copper, from o'oo6 to 0*007 of silver, and some gold, is roasted in open heaps, ...
Bruno Kerl, Sir William Crookes, Ernst Otto Röhrig, 1869
5
The Mining and Smelting Magazine
The object of the first process (Rohprozesse) is the production from the low-
produce ores described of a regulus, called concen- tration-regulus, which
contains from 65% to 69% of copper, and is ready for desilverisation. As in this
process ...
6
A treatise on chemistry
Silver is also generally present and is removed by special processes, which are
described later, and which enable the silver to be recovered. It is also necessary
to remove impurities before desilverisation, as copper, antimony and arsenic ...
Henry Enfield Roscoe, Carl Schorlemmer, 1913
7
Comprehensive Engineering Chemistry
Desilverisation of Argentiferrous Lead (Pattinsons Process) The process, which is
used for the recovery of silver from argentiferrous lead is called Pattinsons
process and involves the desilverisation of lead in accordance to the phase
diagram ...
Devender Singh, Satish Kumar Vats, 2007
8
Iit Objective Chemistry
Arun Syamal. 22. In which of the following processes, the metal is purified by the
formation of a volatile coordination compound? (A) Thermit process (B) Van Arkel
process (C) Mond process (D) Carter and Brown process. 23. Desilverisation of ...
9
Competition Science Vision
Desilverisation of lead may be carried out by using the — (A) Parke's process (B)
Mac-Arthur-Forrest process (C) Parting process (D) Cyanide process 31 . Impure
nickel is purified by — (A) The Van Arkel process (B) Electrolytic refining (C) ...
10
The Experimental Basis of Chemistry; Suggestions for a ...
Various methods are employed industrially for the ' desilverisation' of the lead
alloy, which in this case means production of the pure silver. Amongst these are
some which make use of the fact that in the alloy each of the metals retains its
own ...
