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I know the famous reaction:

Soda lime reaction with Sodium Benzoate

I was thinking of extension of this reaction to other salts of Benzoic Acids such as: $$\ce{Potassium Benzoate + KOH ->[CaO,Δ] Benzene + K2CO3}$$ Is this reaction really carried out in Lab or there is not a favorable outcome/different product/unfeasible reaction such as in case of Kolbe's Reaction we obtain different products(basically isomers) for Na containing compound and for K containing compound.

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    $\begingroup$ Benzene is cheap and widely available, no-one needs to make benzene this way. $\endgroup$
    – Waylander
    Commented Dec 4, 2022 at 15:55
  • $\begingroup$ @Waylander Ok , if not for practical purposes , consider this question for theoretical interest. $\endgroup$
    – CHEMUMAN
    Commented Dec 4, 2022 at 16:42
  • $\begingroup$ It certain works for sodium salts so I don't see why it would not work for potassium salts chem.libretexts.org/Bookshelves/Organic_Chemistry/… $\endgroup$
    – Waylander
    Commented Dec 4, 2022 at 17:06
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    $\begingroup$ And since expense is no object, try RbOH and CsOH... but not FrOH. Benzene is enough of a health hazard. $\endgroup$
    – DrMoishe Pippik
    Commented Dec 4, 2022 at 17:38
  • $\begingroup$ CaCO3, not K2CO3. $\endgroup$
    – Poutnik
    Commented Dec 29, 2022 at 9:39

1 Answer 1

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The reaction is famously known as soda-lime decarboxylation because of its use of sodalime which is mixture of $\ce{CaO}$ (75%) and $\ce{NaOH}$ (3%). It also contains trace amount of $\ce{KOH}$ (0.1%). You can however alter the composition where $\ce{KOH}$ is in majority while $\ce{NaOH}$ is in trace and the reaction will work in similar manner since the chemistry is not altered.

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