to iodine dissolved in potassium hydroxide formic acid is slowly added until the white ppt(potassium iodate) dissolves then adjusting the pH of the solution with either formic acid (if basic) or KOH (if acidic) to pH 7 now we have solution of KI, without KIO3 made from iodine and KOH: 3I2 + 6KOH + H2O -> 5KI+KIO3+H2O further formic acid reduces KIO3 from the previous reaction to KI, water and carbon dioxide KIO3 + 3HCOOH ->KI + 3H2O + 3CO2. once the KI solution is prepared more iodine is dissolved in it until the liquid becomes very dark brown KI(aq) + I2(s) ->KI3(aq) once we have the Lugol’s solution we can dissolve some gold in it if during the leach the solution is brown but you can see through it when put against light you need to add more iodine and the leach will start working again that was the case here (solution was brown-red but transparent – CPU was intact) so I’ve added more iodine and the gold started dissolving you can tell if it’s ok by the yellow film the solution leaves on the wall of the beaker when shaken OOOPS I dropped it rinsing in another beaker precipitating with ascorbic acid (vitamin C) you can find more about the process on the other videos

Iodine – GOLD extraction from ceramic CPU

29 thoughts on “Iodine – GOLD extraction from ceramic CPU

  • July 17, 2017 at 8:49 am
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    I need chemical ingredients. KOH
    And how to use to gold

    Reply
  • July 17, 2017 at 9:49 am
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    I am not good at English Print to remove translation.Sedimentation

    Reply
  • July 17, 2017 at 9:58 am
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    NaOH Mix Hcl

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  • July 17, 2017 at 10:00 am
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    What is black

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  • July 17, 2017 at 11:29 am
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    KCl + Koh + iodine
    Is that correct

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  • July 17, 2017 at 2:00 pm
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    Koh + water 7 Ph + Kl + Iodide Is it correct

    Reply
  • July 19, 2017 at 3:58 pm
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    Very dangerous Experimental results Iodide

    Reply
  • July 20, 2017 at 11:39 am
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    Combustible chemicals

    Reply
  • July 20, 2017 at 1:19 pm
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    I Use google Translate
    Dangerous smoke Iodide
    I Use acid gold
    Thank You to Reply back

    Reply
  • July 20, 2017 at 1:30 pm
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    I' m in thailand

    Reply
  • July 22, 2017 at 2:07 am
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    I did not succeed Iodide

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  • July 22, 2017 at 4:43 am
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    Ha Ha Ha !

    Reply
  • July 22, 2017 at 4:48 am
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    Thai people are not good at English

    Reply
  • July 22, 2017 at 4:54 am
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    I invented a box No smoke acid Have succeeded

    Reply
  • July 22, 2017 at 5:02 am
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    Where do you come from

    Reply
  • July 24, 2017 at 12:45 pm
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    I2:KI:H2O =1:4:40 ok

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  • July 25, 2017 at 3:09 am
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    Potassium iodide price expensive find buy Hard

    Reply
  • August 1, 2017 at 7:20 pm
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    HELLO I CAN USE KOH + I2 + H2O? AND PRECIPITATE WITH MSB?

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  • August 3, 2017 at 6:00 pm
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    hi. dear l i want say my first work with bag labtab ic chips … I add 100 bag ic in a steel pot then i add sulfric acid for 50 minutes then all desolved then i washed four times they become clean then i added nitric acid all copper and metal desolved then i wash three times  the gold weirs and then i added the rega aqui slowly the gold weirs desoleved. And got yellow color then i filtered and then added some water and added urea but urea didn't ricted then added more water with smb and the solution got brown color  unfortunately a shak a metal  spoon in solution but the spoon eated and know it is three days that  the gold powder is not settled down the plastuc can…. please know me thanks

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  • August 4, 2017 at 2:59 am
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    hi dear it was made from iron

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  • August 4, 2017 at 3:00 am
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    hi dear the spoon was made from iron

    Reply
  • August 4, 2017 at 3:42 am
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    hi dear the color got brown thanks

    Reply
  • August 4, 2017 at 7:10 am
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    no dear but a little

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  • August 4, 2017 at 7:23 am
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    the spoon a little desolved dear sir

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  • August 4, 2017 at 7:43 am
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    hi dear sir what if. i did not add urea then i add smb what happening in my solution

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  • August 4, 2017 at 8:05 am
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    hi dear know my solution is brown flum

    Reply
  • November 17, 2017 at 12:21 am
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    Интересно

    Reply
  • April 4, 2018 at 6:12 am
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    Добрый день, подскажите сколько грамм гидроксида калия нужно и сколько грамм йода для начального растворения.

    Reply

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