Patent ID: 8632729

Claim:
A fixed bed reactor for carrying out a gas/liquid mixed phase reaction, comprising a single fixed bed or multiple fixed beds arranged in parallel said fixed bed or beds being composed of microchannels having a cross-sectional area of 0.0001 cm 2 to 0.008 cm 2 and having a packing material structure wherein a packing material is filled into the microchannels of the fixed bed or fixed beds, a gas phase introduction portion; and a liquid phase introduction portion, located upstream of said gas phase introduction portion and an outlet portion for recovering a reaction product; wherein said gas phase introduction portion and said liquid phase introduction portion have a piping structure composed of microchannels, said piping structure having certain cross-sectional area so as to satisfy the condition ΔP g >5ΔP l under mixed gas/liquid phase reaction conditions, wherein said packing material structure promotes formation of a mixed gas/liquid phase and is formed so as to satisfy the conditions, ΔP g >5ΔP l under mixed gas/liquid phase reaction conditions where ΔP g represents the pressure drop of the piping of the gas phase introduction portion when the gas phase has passed therethrough and ΔP l represents the pressure drop when the liquid phase has passed through the fixed bed reactor via the liquid phase introduction portion.