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. 03, 2009
Filed:
Apr. 28, 2005
Seong Pil Kang, Daejeon, KR;
Seok Hwan Choi, Daejeon, KR;
Kyoung Su Ha, Daejeon, KR;
Jun Seok Ko, Seoul, KR;
Boo Gon Woo, Daejeon, KR;
Young Bae Kim, Jeollanam-do, KR;
Seong Pil Kang, Daejeon, KR;
Seok Hwan Choi, Daejeon, KR;
Kyoung Su Ha, Daejeon, KR;
Jun Seok Ko, Seoul, KR;
Boo Gon Woo, Daejeon, KR;
Young Bae Kim, Jeollanam-do, KR;
LG Chem, Ltd., Seoul, KR;
Abstract
Disclosed is a simplified method for recovering acrylic acid from a mixture containing acrylic acid, acrylic acid dimer and impurities with high boiling point, in a stable and efficient manner. The method comprises the steps of: introducing the mixture into an acrylic acid recovering device comprising an acrylic distillation unit integrated with an acrylic acid dimer pyrolysis tank; carrying out decomposition of acrylic acid dimmer under reduced pressure and recovering acrylic acid. The method optionally further comprises a step of recycling a portion of the solution obtained from the bottom of the acrylic acid recovering device to the acrylic acid recovering device.