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:
Mar. 27, 2012
Filed:
Sep. 17, 2010
Boo Gon Woo, Daejeon, KR;
Jun Seok Ko, Daejeon, KR;
Kyoung Su Ha, Daejeon, KR;
Seong Pil Kang, Daejeon, KR;
Seok Hwan Choi, Daejeon, KR;
Young Bae Kim, Yeosu-si, KR;
Boo Gon Woo, Daejeon, KR;
Jun Seok Ko, Daejeon, KR;
Kyoung Su Ha, Daejeon, KR;
Seong Pil Kang, Daejeon, KR;
Seok Hwan Choi, Daejeon, KR;
Young Bae Kim, Yeosu-si, KR;
LG Chem, Ltd., , KR;
Abstract
Disclosed is a shell-and-tube heat exchanger type reactor that can be used for a process of producing unsaturated acids from olefins via fixed-bed catalytic partial oxidation, which comprises at least one reaction tube, each including at least one first-step catalyst layer, in which olefins are oxidized by a first-step catalyst to mainly produce unsaturated aldehydes, and at least two second-step catalyst layers, in which the unsaturated aldehydes are oxidized by a second-step catalyst to produce unsaturated acids, wherein a first catalyst layer of the second-step catalyst layers, disposed right adjacent to the first-step catalyst layer, has an activity corresponding to 5˜30% of the activity of the catalyst layer having a highest activity among the second-step catalyst layers. A method of producing unsaturated acids from olefins by using the reactor is also disclosed.