US 11,858,890 B2
Reactor and process for producing alkyl (meth)acrylates
Steffen Krill, Muehltal (DE); Belaid Ait Aissa, Darmstadt (DE); Andreas Rühling, Darmstadt (DE); Mounir Stitou, Wuppertal (DE); Andreas Gräff, Riedstadt-Erfelden (DE); and Olaf Merker, Gondelsheim (DE)
Assigned to Röhm GmbH, Darmstadt (DE)
Filed by Röhm GmbH, Darmstadt (DE)
Filed on May 25, 2022, as Appl. No. 17/804,057.
Claims priority of application No. 21176498 (EP), filed on May 28, 2021.
Prior Publication US 2022/0388941 A1, Dec. 8, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C07C 67/42 (2006.01); B01J 19/18 (2006.01); B01J 35/02 (2006.01)
CPC C07C 67/42 (2013.01) [B01J 19/1856 (2013.01); B01J 35/023 (2013.01); B01J 35/026 (2013.01); B01J 2219/00481 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A process for producing alkyl (meth)acrylates, comprising:
reacting (meth)acrolein with an alkyl alcohol in a reactor, in the presence of an oxygen-containing gas and a particulate, pulverulent catalyst in a liquid phase, to obtain an alkyl (meth)acrylate;
wherein a reaction medium is discharged from the reactor during the reaction, wherein the reaction medium comprises a first portion of the catalyst and a product solution, wherein the first portion of the catalyst is discharged in a classifying manner,
wherein a second portion of the catalyst remaining in the reactor has a higher particle size distribution compared to the first portion of the catalyst,
wherein the first portion of the catalyst is collected in at least one filter,
wherein, optionally, the first portion of the catalyst is at least partially recycled into the reactor, and
wherein, optionally, the first portion of the catalyst is at least partially removed and sent to a workup for recovery of at least one employed catalyst metal of the catalyst.