Timeline for Froth floatation process - why CuSO4 is activating floating character of ZnS?
Current License: CC BY-SA 3.0
32 events
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| Jan 31, 2017 at 14:50 | history | edited | Resorcinol | CC BY-SA 3.0 |
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| Jan 12, 2017 at 16:29 | history | edited | Resorcinol | CC BY-SA 3.0 |
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| Jan 8, 2017 at 6:45 | vote | accept | Resorcinol | ||
| Jan 8, 2017 at 6:08 | history | edited | Resorcinol | CC BY-SA 3.0 |
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| S Jan 2, 2017 at 12:20 | history | bounty ended | CommunityBot | ||
| S Jan 2, 2017 at 12:20 | history | notice removed | CommunityBot | ||
| Dec 28, 2016 at 1:40 | vote | accept | Resorcinol | ||
| Jan 8, 2017 at 0:27 | |||||
| Dec 27, 2016 at 2:03 | answer | added | Resorcinol | timeline score: 3 | |
| Dec 26, 2016 at 16:51 | answer | added | permeakra | timeline score: 3 | |
| Dec 26, 2016 at 12:48 | history | edited | Resorcinol | CC BY-SA 3.0 |
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| Dec 26, 2016 at 5:34 | history | edited | Resorcinol | CC BY-SA 3.0 |
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| Dec 25, 2016 at 14:14 | history | edited | Resorcinol | CC BY-SA 3.0 |
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| Dec 25, 2016 at 10:58 | history | edited | Resorcinol | CC BY-SA 3.0 |
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| S Dec 25, 2016 at 10:56 | history | bounty started | Resorcinol | ||
| S Dec 25, 2016 at 10:56 | history | notice added | Resorcinol | Draw attention | |
| Dec 23, 2016 at 1:58 | history | edited | Resorcinol | CC BY-SA 3.0 |
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| Dec 22, 2016 at 22:57 | history | edited | Resorcinol | CC BY-SA 3.0 |
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| Dec 22, 2016 at 6:35 | history | edited | Resorcinol | CC BY-SA 3.0 |
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| Dec 12, 2016 at 1:01 | history | edited | Resorcinol | CC BY-SA 3.0 |
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| Oct 21, 2016 at 14:47 | history | edited | Resorcinol | CC BY-SA 3.0 |
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| Oct 18, 2016 at 11:34 | history | edited | Resorcinol | CC BY-SA 3.0 |
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| Oct 16, 2016 at 15:40 | history | tweeted | twitter.com/StackChemistry/status/787679625937842180 | ||
| Oct 16, 2016 at 12:54 | history | edited | Resorcinol | CC BY-SA 3.0 |
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| Oct 16, 2016 at 11:05 | comment | added | Curt F. | Can you add a link or reference to the quoted text please? It would make your very nice question even better. | |
| S Oct 16, 2016 at 4:18 | history | suggested | Shailesh | CC BY-SA 3.0 |
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| Oct 16, 2016 at 3:13 | review | Suggested edits | |||
| S Oct 16, 2016 at 4:18 | |||||
| Oct 16, 2016 at 3:04 | history | edited | Resorcinol | CC BY-SA 3.0 |
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| Oct 15, 2016 at 16:11 | history | edited | Resorcinol | CC BY-SA 3.0 |
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| Oct 15, 2016 at 12:54 | comment | added | user7951 | Ullmann’s Encyclopedia mentions “…, sphalerite ($\ce{ZnS}$) does not readily become hydrophobic in the presence of xanthates unless copper (II) ions are introduced into the aqueous pulp. In this case $\ce{CuSO4}$, used to supply copper (II) ions, is an activator.” and also includes a plot of this effect, but does not give further chemical explanation. | |
| Oct 15, 2016 at 6:39 | history | edited | Resorcinol | CC BY-SA 3.0 |
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| Oct 13, 2016 at 4:50 | comment | added | MaxW | There is obviously some interesting chemistry in this. I'd guess that the $\ce{Cu^{2+}}$ ions react with the cyanide to form complexes of some sort, probably of copper (I). Adding acid to a solution of plain cyanide anions would of course release HCN fumes which would be very dangerous otherwise. | |
| Oct 12, 2016 at 10:23 | history | asked | Resorcinol | CC BY-SA 3.0 |