Mixtures of isomeric pentanoic acids, esters prepared therefrom, and their use as lubricants

US5410072A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Helmut Bahrmann · Hamminkeln, DE
• Wolfgang Greb · Dinslaken, DE
• Georg Dambkes · Dinslaken, DE
• Peter Heymanns · Essen, DE
• Heinz Kalbfell · Schermbeck, DE
• Peter Lappe · Dinslaken, DE
• Helmut Springer · Dinslaken, DE
• Eberhard von Mulmann · Oberhausen, DE
• Jurgen Weber · Oberhausen, DE
• Ernst Wiebus · Oberhausen, DE
• Carl D. Frohning · Wesel, DE
• Harald Kappesser · Oberhausen, DE

Key dates

• Filing date: Sep 23, 1994
• Grant date: Apr 25, 1995
• Expiry date: Sep 23, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2040/50
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Isomeric mixtures of pentanoic acids are prepared by subjecting butene-1/butene-2 mixtures to hydroformylation to form aldehyde mixtures, followed by oxidation of the aldehyde mixtures which have been separated off from the reaction product. The hydroformylation is carried out in a heterogeneous system in the presence of rhodium catalysts which are dissolved in water. The mixture of isomeric 5 carbon monocarboxylic acids produced, when esterified with polyhydric alcohols, yields mixtures of isomeric esters which are useful as lubricants for refrigerant compressors operated with chlorine-free, at least partly fluorinated hydrocarbons as the refrigerant.