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plante1999
International Hazard
Posts: 1936
Registered: 27-12-2010
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Mood: Mad as a hatter
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it is very common to find 85% nickel coin in canada but for geting the nickel the best way I find is disolve the alloy in 30%HCl with 3% H2O2, than is
precipitating the sulfide , leaching the sulfide with chlorine to solubilise copper but, dont solubilise nickel sulfide , prety hard process but very
effective.
for your ''i had NaOH and the precipitate was black'' , this process dont work , this is just theorie , when i test this it was non-worcking.
but , why you dont post that on the nickel extraction post , also i wasn't usefull in the post of the extraction of nickel.
about CrCl3 leaching process , it work good , altoug after a certain amont of time it stop to disolve and whe need to lets it in air with HCl to get
again CrCl3. some iron impurity is observed.
i thing for beter inprouvement , ading na2s to solution of ss 18/0 to precipitate sulfide and than leach the crushed sulfide with CrCl3.
but for worcking process i think at this time the best process is the one i explain up ther , (you can replace the lead acetate by satured sol of zinc
chloride).
at this time i am in work for making a video about the extraction of Cr.
[Edited on 11-4-2011 by plante1999]
[Edited on 11-4-2011 by plante1999]
[Edited on 11-4-2011 by plante1999]
I never asked for this.
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plante1999
International Hazard
Posts: 1936
Registered: 27-12-2010
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Mood: Mad as a hatter
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today something very special appen , i made a solution of 4% sodium hydrogen carbonate and i electrolise 18/0 ss and after a certain amont of time i
stop the electrolisis and i ad other sodium hydrogen carbonate , at the start nothing but , after 15seconde very vigourus reaction ocured relaching a
gas that smell carbon dioxide , wath is this!
also it react with all sodium hydrogen carbonate i ad, over 40g was aded to 70ml of solution , migh the solution is a catalyst for decomposition of
sodium hydrogen carbonate.
I never asked for this.
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cyanureeves
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would not that be a hydroxide?dude i electrolyzed for three days and every day i would add a bunch of sodium carbonate and its like it disappears to
nowhere with only a tad of precipitate.carbon dioxide smell?is that like the smell of scentless lye soap?is your solution chromium yellow or ferrous
green?
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plante1999
International Hazard
Posts: 1936
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Mood: Mad as a hatter
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my sol is green and when i ad the NaHCO3 lot of buble are producted the same smell as when i make carbon dioxide from NaHCO3 , i suspect something
like this:
....................catalyst
2NaHCO3 ---------->Na2CO3 + CO2 + H2O
[Edited on 14-4-2011 by plante1999]
[Edited on 14-4-2011 by plante1999]
[Edited on 14-4-2011 by plante1999]
I never asked for this.
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Arthur Dent
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An even better, from 1955 to 1981, all canadian 5 cent pieces were made out of solid 99.9% nickel! That's how I made myself a small batch of nickel
chloride, I dissolved 6 or 7 coins in HCl (took months) until they were nearly completely gone. The resulting solution was a beautiful emerald green
color.
Robert
--- Art is making something out of nothing and selling it. - Frank Zappa ---
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blogfast25
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CO2 is odourless.
Measure the pH when the bicarbonate starts fizzing. Electrolysis seems to have rendered your solution aicdic. Your 'catalyst' is H3O+.
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cyanureeves
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wikipedia shows canadian coins made prior to 1999 to be of 99% nickel, 1968 quarters to be of 50% silver and all main streets paved in gold. whoa!
nickels were changed in composite in 1981 but not the quarters, canada's money value is backed by nickel?plante1999 maybe your effervesence is just
oxide build up on annode or cathode contact and is causing a delay in reaction. cool reaction you got figured out i just thought that and oxygen atom
gets pushed out at the annode and hydrogen at the cathode.it will be interesting to see where the chromium will end up.
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Zyklon-A
International Hazard
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After searching through all my "silverware", I found three fork that said: SS, 18CR. So does that mean that it's composition is 18% Cr and 82% Fe? It
didn't say: 18/0 or 0 Ni, so should I just assume it contains no nickel?
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blogfast25
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Stainless steel is supposed to be 10.5 % minimum of Cr. No Ni.
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Zyklon-A
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I don't know if that's what SS is supposed to be. But many kinds of SS silverware contains nickel. 18/10 SS is 72% Fe, 18% Cr and 10% Ni.
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Crowfjord
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There are many different grades of stainless steel with their own specifications on elemental percentages. The most common I've dealt with are 304 and
316, which can contain between 16 to 19 or so percent Cr (the highest I have seen was about 25 percent Cr, I think), 8-10 percent Ni, up to 2 percent
Mo and about 1 percent Mn. I rarely see stainless steel without at least a couple weight percent nickel, with 400 series steels like 410 and 416 type
steels being an exception.
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Zyklon-A
International Hazard
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This site says that there are two kinds of silverware, 18/10 and 18/0, which the "18" is the Cr and the "10 or 0" is the Ni.
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