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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.
Àárín
2–3 days
Ìlànà
1
1
Make calcium acetate
Make calcium acetate
Soak crushed limestone in vinegar. The acetic acid dissolves the calcium carbonate as calcium acetate.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Kábónéètì Kalisiọ̀mù - Òkúta Ẹfun Fífọ́1 as required
Ọtí kíkan1 as requiredÀwọn irinṣẹ́ tí a nílò:
Agba ìdásí2
2
Dry the salt
Dry the salt
Draw off the solution and evaporate the water to leave dry calcium acetate.
Àwọn irinṣẹ́ tí a nílò:
Ẹ̀rọ ìsọ-omi-di-èéfín3
3
Dry-distil
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.
Àwọn irinṣẹ́ tí a nílò:
Ohun ìbíra irin
Ìyípo ẹ̀rọ ìtutùÀwọn irinṣẹ́ tó nílò
4- Àyè
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