The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 25, 1995
Filed:
Sep. 23, 1994
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, Oberhausen, DE;
Eberhard von Mulmann, Oberhausen, DE;
Jurgen Weber, Oberhausen, DE;
Ernst Wiebus, Oberhausen, DE;
Carl D Frohning, Wesel, DE;
Harald Kappesser, Oberhausen, DE;
Hoechst Aktiengesellschaft, , DE;
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.