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:
Aug. 07, 2007
Filed:
Oct. 01, 2004
Michel Fauconet, Valmont, FR;
Jean-marie Destenay, Villing, FR;
Michel Fauconet, Valmont, FR;
Jean-Marie Destenay, Villing, FR;
Arkema France, Puteaux, FR;
Abstract
The present invention relates to a method for purifying (meth)acrylic acid obtained by oxidizing propane, propylene, acrolein, isobutane, isobutene, ter-butyl alcohol, (meth)acrolein and mixtures thereof by sending the gaseous reaction mixture to the bottom of a countercurrent absorption column (C) which is supplied at the top with at least one type of hydrophobic heavy solvent, sending the flow () from the bottom of column (C) to a light component separation column (C) and sending the flow from the base of column (C), stream (4) to a separation device made up of three sections, exhaustion (S), concentration (S) and rectification (S) respectively in order to extract pure (meth)acrylic acid.'