Patent · US Active

Process for preparing aldehydes and cooling a stream of matter

US11773041B2 · kind B2 · utility

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20Claims

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Assignee

Evonik Operations GmbH · DE

Inventors

Frank Geilen · Haltern am See, DE
Alexander Brächer · Haltern am See, DE
Stefan Drees · Delmsen, DE
Benedikt Dereks · Bochum, DE
Robert Franke · Marl, DE
Ana Markovic · Haltern am See, DE
Armin Matthias Rix · Marl, DE
Martin Oldemeyer · Haltern am See, DE
Dirk Fridag · Haltern am See, DE

Key dates

Filing date	Nov 16, 2022
Grant date	Oct 3, 2023
Priority date	—
Expiry date	Nov 16, 2042

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C2523/46
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for preparing aldehydes by a homogeneously catalyzed 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 in a three-stage removal.

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