The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 12, 2013
Filed:
Feb. 23, 2010
Alfred Kaizik, Marl, DE;
Dirk Fridag, Haltern am See, DE;
Hans-gerd Lueken, Marl, DE;
Wilfried Bueschken, Haltern am See, DE;
Alfred Kaizik, Marl, DE;
Dirk Fridag, Haltern am See, DE;
Hans-Gerd Lueken, Marl, DE;
Wilfried Bueschken, Haltern am See, DE;
Evonik Oxeno GmbH, Marl, DE;
Abstract
The invention relates to a method for continuously producing α,β-unsaturated C-aldehydes from aliphatic C-aldehydes, comprising the following steps: aldol-condensing aliphatic C-aldehydes into α,β-unsaturated C-aldehydes in the presence of an aqueous base in a tube reactor; phase separating the output of the tube reactor into an aqueous catalyst phase and an organic product phase; separating the organic product phase into α,β-unsaturated C-aldehydes, aliphatic C-aldehydes, and auxiliary products; discharging a part of the aqueous catalyst phase to remove the reaction water and supplementing said part with liquor solution and subsequently returning said part to the tube reactor. The task of the invention is to improve a method of said kind in a way such that it requires lower energy input. This is achieved in that the aliphatic C-aldehydes and/or the α,β-unsaturated C-aldehydes are dispersed in the aqueous base as drops, wherein the average Sauter diameter of the drops is between 0.2 mm and 2 mm.