Preparation of higher &agr;, &bgr;-unsaturated alcohols

US6828468B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Andreas Ansmann · Wiesloch, DE
• Jochem Henkelmann · Mannheim, DE
• Alois Kindler · Haßloch, DE
• Heinz Etzrodt · Neustadt, DE
• Carsten Oost · Bad Dürkheim, DE
• Susanne Stutz · Weinheim, DE
• Christian Tragut · Monsheim, DE
• Bernhard Bockstiegel · Wasserburg am Inn, DE
• Klaus Reimer · Mutterstadt, DE
• Manfred Stroezel · Ilvesheim, DE
• Walter Dobler · Schwetzingen, DE

Key dates

• Filing date: May 6, 2002
• Grant date: Dec 7, 2004
• Expiry date: Oct 11, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C45/676
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Higher &agr;,&bgr;-unsaturated alcohols are prepared by monoethynylation of a ketone by the NH3/KOH method, if desired hydrogenation of the acetylene alcohol in the presence of hydrogen over a Pd-containing thin layer catalyst, purifying distillation of the hydrogenation product, preferably in a dividing wall column with recirculation of the unreacted ketone to the ethynylation step, and, if desired, preparation of higher alcohols having in each case 5 more carbon atoms in the chain by reacting the alcohols prepared by monoethynylation and, if desired, partial hydrogenation with alkyl acetoacetates diketene in a Carroll reaction to form ketones and using these as starting materials for the steps ethynylation, optional hydrogenation and fractional distillation.