Back to results
US 11,840,506 B2Granted
Process for preparing C5 aldehydes
AssigneeEvonik Operations GmbH
InventorsDirk Fridag, Johannes Knossalla, Alexander Brächer, Peter Kucmierczyk, Anna Chiara Sale, Robert Franke, Ana Markovic
Life of this patent
Estimating the term…
Abstract
A process for preparing C5 aldehydes involves hydroformylation of butenes with synthesis gas in the presence of a homogeneous catalyst system and a solvent. It is a feature of the process that the aldehyde concentration in the reaction mixture is limited.
Claims17
A process for preparing C5 aldehydes by hydroformylation of butenes, the process comprising:
- reacting the butenes with synthesis gas in at least one reaction zone of a reactor, in the presence of a homogeneous catalyst system and of a solvent, wherein a cycle gas containing at least a portion of product aldehydes, unconverted butenes, and butanes is removed from the at least one reaction zone, and
- wherein an aldehyde concentration in a liquid reaction mixture in the reactor is kept below 15% by mass by the cycle gas.
A liquid mixture, comprising:
- an aldehyde,
- cobalt or rhodium,
- an organic phosphorus-containing ligand, and
- a solvent,
- wherein an aldehyde concentration in the liquid mixture is below 15% by mass.
2 more elements
Dependencies are inferred from the claim text.