Title: Method for vapor phase catalytic oxidation
Application Number: 02827630 Application Date: 2002.12.20
Publication Number: 1617843 Publication Date: 2005.05.18
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C07C27/14;C07C45/33;C07C45/35;C07C47/22;C07C51/25;C07C57/05;C07B33/00;B01J8/02
Applicant(s) Name: Mitsubishi Chem Corp. Address:
Inventor(s) Name: Saito Teruo;Suzuki Yoshiro;Yada Shuhei;Goriki Masa
Attorney & Agent: bian xinqin wu xiaonan
Abstract:
    A method for vapor phase catalytic oxidation involving using a fixed bed multi-tube heat-exchanger type reactor having a plurality of reaction tubes, feeding a raw material gas for reaction to the inside of the reaction tube packed with a catalyst to produce a reaction product gas, characterized in that the pressure loss of each reaction tube having a catalyst packed therein is adjusted in a manner wherein a reaction tube showing a pressure loss less than an average pressure loss for the total reaction tubes is additionally packed with an inert material in its portion near the entrance of a raw material gas, or is removed of the catalyst and re-packed with the catalyst, and a reaction tube showing a pressure loss greater than the above average value is removed of the catalyst and then re-packed with the catalyst, so as for the each reaction tube to show a pressure loss within the range of - 20 % of the average value. The method can provide a vapor phase catalytic oxidation method which is almost free of variations in the reaction states in respective reaction tubes.
Time: 6
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