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:
Jun. 27, 2006
Filed:
Jun. 09, 2004
Yasuyuki Sakakura, Tokyo, JP;
Shuhei Yada, Yokkaichi, JP;
Hirochika Hosaka, Yokkaichi, JP;
Yasushi Ogawa, Yokkaichi, JP;
Yoshiro Suzuki, Yokkaichi, JP;
Yasuyuki Sakakura, Tokyo, JP;
Shuhei Yada, Yokkaichi, JP;
Hirochika Hosaka, Yokkaichi, JP;
Yasushi Ogawa, Yokkaichi, JP;
Yoshiro Suzuki, Yokkaichi, JP;
Mitsubishi Chemical Corporation, Tokyo, JP;
Abstract
In the process for producing (meth)acrolein or (meth)acrylic acid, which comprises feeding a raw material of the (meth)acrolein or (meth)acrylic acid, and a molecular oxygen-containing gas mixed with a diluting gas and compressed by a compressor, to an oxidation reactor to conduct a catalytic gas-phase oxidation reaction therebetween; feeding the obtained reaction gas to an absorption column to contact with water; recovering an aqueous solution of the (meth)acrolein or (meth)acrylic acid from a bottom of the absorption column and an exhaust gas from a top of the absorption column; and recycling a part or whole of the thus recovered exhaust gas to use as the diluting gas, the temperature of the mixed gas at a suction inlet of the compressor is controlled to a temperature higher than a dew point thereof. According to the process of the present invention, the compressor is prevented from suffering from clogging or damage thereto.