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. 13, 2007
Filed:
Dec. 13, 2002
Gunther Bub, Marl, DE;
Jurgen Mosler, Castrop-Rauxel, DE;
Dietrich Maschmeyer, Recklinghausen, DE;
Andreas Sabbagh, Moers, DE;
Roland Fornika, Dulmen, DE;
Matthias Peuckert, Hunxe, DE;
Gunther Bub, Marl, DE;
Jurgen Mosler, Castrop-Rauxel, DE;
Dietrich Maschmeyer, Recklinghausen, DE;
Andreas Sabbagh, Moers, DE;
Roland Fornika, Dulmen, DE;
Matthias Peuckert, Hunxe, DE;
Stockhausen GmbH, Krefeld, DE;
Abstract
The present invention relates to a process for the production of acrylic acid (AA) comprising the steps wherein: a) a 1st gas mixture comprising propylene, oxygen, an inert gas and steam is subjected to a 1st catalytic oxidation reaction stage thereby converting the propylene in the presence of a catalyst mainly into acrolein being contained in a 2nd gas mixture from said 1st catalytic oxidation reaction, b) said 2nd gas mixture from the 1st catalytic oxidation reaction stage is subjected to a 2nd catalytic oxidation reaction stage thereby converting the acrolein in the presence of a catalyst mainly into AA, being contained in a product gas, c) said product gas is subjected to a quench tower, wherein said AA is recovered as an aqueous solution comprising said AA being contained in the process water, wherein a process vent gas is obtained at the top of said quench tower, wherein, said 1st gas mixture has a steam/propylene ratio of >0.3 and <2 and, the amount of said process water is less or equal to the amount of water in said aqueous solution withdrawn from the quench tower.