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. 22, 2005
Filed:
Jul. 01, 2002
Sei Nakahara, Himeji, JP;
Kazuhiko Sakamoto, Himeji, JP;
Yukihiro Matsumoto, Kobe, JP;
Kenji Sanada, Himeji, JP;
Masatoshi Ueoka, Himeji, JP;
Sei Nakahara, Himeji, JP;
Kazuhiko Sakamoto, Himeji, JP;
Yukihiro Matsumoto, Kobe, JP;
Kenji Sanada, Himeji, JP;
Masatoshi Ueoka, Himeji, JP;
Nippon Shokubai Co., Ltd., Osaka, JP;
Abstract
The present invention provides an apparatus for producing (meth)acrylic acid and a process for producing (meth)acrylic acid with this apparatus wherein the apparatus enables the production of (meth)acrylic acid stably for a long period of time by effectively inhibiting the polymerization of (meth)acrylic acid in its production process (for example, in a reboiler). At least a part of the apparatus is made of a nickel-chromium-iron alloy with a molybdenum content of 3 to 20 mass %, but not including 3 mass %, or with a molybdenum content of 1 to 4 mass % and a copper content of 0.5 to 7 mass %.