Isomeric nonanols and decanols, their preparation, phthalic esters obtained therefrom and their use as plasticizers

US6482972B1 · kind B1 · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Helmut Bahrmann · Hamminkeln, DE
• Wilfried Fenske · Hamminkeln, DE
• Wolfgang Greb · Dinslaken, DE
• Peter Heymanns · Essen, DE
• Peter Lappe · Dinslaken, DE
• Thomas Muller · Bad Homburg vor der Höhe, DE
• Jurgen Szameitat · Wesel, DE
• Ernst Wiebus · Oberhausen, DE

Key dates

• Filing date: May 8, 1995
• Grant date: Nov 19, 2002
• Expiry date: May 8, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C12C11/02
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Mixtures of isomeric nonanols and decanols are obtained by joint aldol condensation of n-butanal and pentanals, and up to 1% by weight of 3-methylbutanal, hydrogenation of the aldol condensation product to the corresponding saturated alcohols, and separation from the reaction mixture of the components boiling at temperatures lower than those of the nonanols and decanols. The pentanals are mixtures of 60 to 90% by weight of n-pentanal and 10 to 40% by weight of 2-methylbutanal. The alcohol mixture is especially suitable for preparing ester plasticizers.