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US 4,057,583 AGranted
Process for the preparation of pinacolone
AssigneeBayer Aktiengesellschaft
InventorsWalter Merz, Dieter Nachtsheim
Life of this patent
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Abstract
The invention provides a novel synthesis for pinacolone comprising reacting 2-methyl-but-2-ene and/or 2-methyl-but-1-ene with an aqueous inorganic acid, adding formaldehyde gradually at a temperature between 50.degree. and 200.degree. C at a rate of 0.5 - 1.5 moles of formaldehyde per mole of butene compound, allowing the mixture to react further, and separating the pinacolone by distillation.
Claims16
Process for the preparation of pinacolone which process comprises
- 1. mixing a butene compound selected from
- a. 2-methyl-but-2-ene of the formula ##STR8## b. 2-methyl-but-1-ene of the formula ##STR9## c. the addition products of the two said butenes of the general formula ##STR10## in which X is Cl, Br, HSO.sub.4 or H.sub.2 PO.sub.4,
- and mixtures of said compounds with an aqueous solution of hydrochloric or hydrobromic acid to provide 15% to 40% by weight of said acid in the aqueous phase of the resulting mixture;
- 2.
1 more element
Dependencies are inferred from the claim text.