Patent ID: 7667072
Filing Date: 2010-02-23
Classification: B01J,C07C

Abstract:
1. A method for vapor phase catalytic oxidation for obtaining a reaction product gas by using a fixed bed multi-tube heat-exchanger type reactor provided with a plurality of reaction tubes and by feeding a raw material gas inside the reaction tubes packed with a catalyst while leaving an empty portion in the upper portion of the reaction tubes, wherein the method comprises: adjusting pressure losses of the respective reaction tubes so that the pressure losses of the respective reaction tubes after catalyst packing is within ±20% of an average pressure loss of the reaction tubes by: packing an inert substance into the empty portion at a raw material gas inlet portion of the reaction tubes or removing and re-packing the catalyst packed, for a reaction tube having a pressure loss lower than the average pressure loss of the reaction tubes; and removing and re-packing the catalyst packed, for a reaction tube having a pressure loss higher than the average pressure loss of the reaction tubes.