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:
Jul. 05, 1994
Filed:
Mar. 08, 1993
Yoshinori Kobayashi, Ehime, JP;
Yasuo Matsumoto, Ehime, JP;
Tadashi Mizuno, Ehime, JP;
Masamitu Fukuda, Ehime, JP;
Sumitomo Chemical Co., Ltd., Osaka, JP;
Abstract
A process for producing acrolein which comprises bringing a reaction gas resulting from a catalytic oxidation of propylene into contact in a cooling tower with a condensate which is being circulated through the cooling tower and a circulating part, thereby to cool and separate the reaction gas and discharge an effluent gas from the cooling tower, the condensate in a bottom part of the cooling tower having a temperature of from 35.degree. to 50.degree. C., the effluent gas discharged from the cooling tower having a temperature of from 35.degree. to 55.degree. C., the temperature of the effluent gas being kept nearly equal to or higher than the temperature of the condensate in the bottom part of the cooling tower, and a process for producing acrolein which comprises bringing a reaction gas resulting from the catalytic oxidation of propylene into contact in a cooling tower with a condensate which is being circulated through the cooling tower and a circulating part, thereby to cool and separate the reaction gases, the period of the residence time of the condensate in the cooling tower and the circulating part being from 0.5 to 3 hours.