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:
Sep. 19, 2006
Filed:
Aug. 01, 2003
Harunori Hirao, Hyogo, JP;
Yukihiro Matsumoto, Hyogo, JP;
Kenji Sanada, Hyogo, JP;
Takeshi Nishimura, Hyogo, JP;
Harunori Hirao, Hyogo, JP;
Yukihiro Matsumoto, Hyogo, JP;
Kenji Sanada, Hyogo, JP;
Takeshi Nishimura, Hyogo, JP;
Nippon Shokubai Co., LTD, Osaka, JP;
Abstract
A method is disclosed which produces acrylic acid in a high yield as maintaining the conditions for purifying acrylic acid in constant ranges and preventing the acrylic acid from polymerization. By using single a single reactor, propylene concentration adjusting in the range of 7–15 vol. % and water concentration adjusting in the range of 0–10 vol. % are introduced thereinto thereby obtaining an acrylic acid-containing gas. Then the gas is introduced to an acrylic acid absorption column to adjust water concentration in the range of 1–45 wt. %, thereby preventing from polymerization.