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. 21, 2007
Filed:
Apr. 21, 2004
Shuhei Yada, Yokkaichi, JP;
Kimikatsu Jinno, Yokkaichi, JP;
Yasushi Ogawa, Yokkaichi, JP;
Yoshiro Suzuki, Yokkaichi, JP;
Shuhei Yada, Yokkaichi, JP;
Kimikatsu Jinno, Yokkaichi, JP;
Yasushi Ogawa, Yokkaichi, JP;
Yoshiro Suzuki, Yokkaichi, JP;
Mitsubishi Chemical Corporation, Tokyo, JP;
Abstract
A method for collecting acrylic acid is provided, which includes the step of collecting acrylic acid using an aqueous medium from a reaction gas containing acrylic acid obtained by catalytic vapor-phase oxidation of propane, propylene, and/or acrolein, the step being conducted so as to satisfy the following formula (1) (B/A)<1.25 (1) wherein A represents a weight fraction of acrylic acid to all condensable ingredients in the reaction gas before collecting acrylic acid and B represents a weight fraction of acrylic acid in bottoms of a collection device used in the step of collecting. According to the method, acrylic acid can be efficiently collected from the reaction gas containing acrylic acid obtained by catalytic vapor-phase oxidation.