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Acetone by Dry Distillation of Acetate of Lime
LHcheM (Wikimedia Commons) · CC BY-SA 3.0
Charlie

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Charlie

11. uMfumfu 2026DE
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Acetone by Dry Distillation of Acetate of Lime

Before the cumene process, acetone was made from "acetate of lime", calcium acetate. Limestone (calcium carbonate) soaked in vinegar gives calcium acetate; when the dry salt is heated it breaks down into calcium carbonate and acetone: Ca(CH₃COO)₂ → CaCO₃ + (CH₃)₂CO. Charles Friedel reported this dry distillation in 1858, and until World War I it was the main commercial way to make acetone. The calcium carbonate is left behind in the retort and the acetone distils over.
Ophakathi
2–3 days

Imiyalelo

1

Make calcium acetate

Soak crushed limestone in vinegar. The acetic acid dissolves the calcium carbonate as calcium acetate.

Izinto zokwakha zalesi sinyathelo:

I-Calcium Carbonate - Itshe Lekalika ElichotshoziweI-Calcium Carbonate - Itshe Lekalika Elichotshoziwe1 as required
UvinigaUviniga1 as required

Amathuluzi adingekayo:

Ithangi lokuzikisaIthangi lokuzikisa
2

Dry the salt

Draw off the solution and evaporate the water to leave dry calcium acetate.

Amathuluzi adingekayo:

Isisetshenziswa sokuhwamulisaIsisetshenziswa sokuhwamulisa
3

Dry-distil

Heat the dry calcium acetate in a closed retort. It decomposes into calcium carbonate, which stays behind, and acetone, which comes off as vapour; condense it.

Amathuluzi adingekayo:

Isitsha sokubilisa sensimbiIsitsha sokubilisa sensimbi
Ugoqo lwe-condenserUgoqo lwe-condenser

Izinto

2

Amathuluzi Adingekayo

4

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