Patent · US Active

Preparation of rhodium(III)-2-ethylhexanoate

US11225498B2 · kind B2 · utility

0Cited by

4References

7Claims

0Family size

Assignee

UMICORE AG & CO. KG · DE

Inventors

Angelino Doppiu · Seligenstadt, DE
Birgit Emrich · Michelstadt, DE
Ralf Karch · Kleinostheim, DE
Andreas Rivas-Nass · Schriesheim, DE
Eileen Woerner · Nidderau, DE

Key dates

Filing date	Nov 21, 2019
Grant date	Jan 18, 2022
Priority date	—
Expiry date	Apr 29, 2040

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C53/128
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The present invention provides a method for preparing rhodium (III) 2-ethylhexanoate solutions which supplies the reaction product with higher space yield, as well as lower sodium and chloride ion content. An aqueous solution of an alkali salt of 2-ethylhexanoate is thereby initially converted with a rhodium (III) precursor. The rhodium (III) precursor is selected from rhodium (III) chloride solution, rhodium (III) chloride hydrate, and rhodium (III) nitrate. The mixture is heated for several hours. After cooling to room temperature, the rhodium (III) 2-ethylhexanoate formed is extracted from the aqueous solution with an alcohol that is immiscible in water or a carboxylic acid that is immiscible in water, and optionally washed with aqueous mineral acid. The rhodium (III) 2-ethylhexanoate solution obtainable in this way may be used directly as catalyst in hydroformylation reactions.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.