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Potassium Persulfate by Electrolysis of Potassium Bisulfate
Charlie

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Charlie

17. Ukwakira 2026DE
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Potassium Persulfate by Electrolysis of Potassium Bisulfate

Potassium persulfate, the initiator that starts emulsion polymerisation (PVA glue), is made by electrolysing a cold, concentrated potassium bisulfate solution at about 1 A/dm² on a platinum anode with a graphite cathode. Sulfate is oxidised to persulfate at the anode, and the sparingly soluble salt crystallises out. It is a strong oxidant: keep it away from organic matter. The picture: our diagram of the cell.
Hagati
One to several days

Amabwiriza

1

Make a strong, cold solution

Dissolve the potassium bisulfate in distilled water to a concentrated solution and keep it cold. A dilute solution gives oxygen instead of persulfate.

Ibikoresho by'iyi ntambwe:

Bisulfate ya potasiyumuBisulfate ya potasiyumu400 g
Amazi YatunganyijweAmazi Yatunganyijwe1 litiro

Ibikoresho bikenewe:

Ikigega cya elegitorolizeIkigega cya elegitorolize
Iminzani ya Digitale yo mu GikoniIminzani ya Digitale yo mu Gikoni
Igipima UbushyuheIgipima Ubushyuhe
Uturindantoki Turwanya IbinyabutabireUturindantoki Turwanya Ibinyabutabire
Amadarubindi y'umutekanoAmadarubindi y'umutekano
2

Electrolyse at high current density

Use a platinum anode and a graphite cathode. Run about 1 A per dm² of anode; hydrogen comes off at the cathode.

Ibikoresho bikenewe:

Insinga ya platineInsinga ya platine
Elegitorode ya garafiteElegitorode ya garafite
Inkomoko y'amashanyarazi y'umurongo umweInkomoko y'amashanyarazi y'umurongo umwe
Ikigega cya elegitorolizeIkigega cya elegitorolize
Igipima UbushyuheIgipima Ubushyuhe
3

Collect the crystals

Potassium persulfate crystallises out as it forms. Filter it off, rinse with a little cold distilled water and dry it (our method).

Ibikoresho bikenewe:

Ifonelo ya Büchner (ya porcelaine)Ifonelo ya Büchner (ya porcelaine)
Urupapuro rwo KuyungururaUrupapuro rwo Kuyungurura
Isahani ifunguye yo kumishaIsahani ifunguye yo kumisha
Uturindantoki Turwanya IbinyabutabireUturindantoki Turwanya Ibinyabutabire
4

Use as initiator

For emulsion polymerisation, about 0.1–0.5 % is used, usually at 75–95 °C. Store it apart from organic materials.

Ibikoresho bikenewe:

Iminzani ya Digitale yo mu GikoniIminzani ya Digitale yo mu Gikoni
5

Charge and time

Gupakira ikaye ya Jupyter…

Ibikoresho

2

Ibikoresho bikenewe

11

Iki gishushanyo gikora

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Agateganyo

Igitangiza cya persulfate

Free

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