Patent · US Active

Process for preparing aldehydes and cooling a stream of matter

US11820739B2 · kind B2 · utility

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20Claims

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Assignee

Evonik Operations GmbH · DE

Inventors

Ana Markovic · Haltern am See, DE
Frank Geilen · Haltern am See, DE
Alexander Brächer · Haltern am See, DE
Benedikt Dercks · Bochum, DE
Stefan Drees · Delmsen, DE
Tonia Weber · Darmstadt, DE
Robert Franke · Marl, DE
Dirk Fridag · Haltern am See, DE

Key dates

Filing date	Nov 15, 2022
Grant date	Nov 21, 2023
Priority date	—
Expiry date	Nov 15, 2042

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C45/81
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for preparing aldehydes by a homogeneously catalysed hydroformylation of C4 to C20 olefins involves withdrawing a biphasic stream (liquid/gaseous) and expanding in two stages. Before, between, or after the two stages, the liquid phase is cooled. Only after expansion and cooling is the homogeneously dissolved rhodium catalyst system separated from the residual stream.

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