Patent ID: 8293181

Claim:
A tubular flow reactor comprising: a cylindrical channel; a mixing shaft which is concentric with the cylindrical channel; and a mixing blade directly attached to the mixing shaft, wherein the tubular flow reactor satisfy the following requirements: t<2C t/2C<A/C≧1, provided that C is a radius of the mixing shaft, t is a thickness of the mixing blade; A is a distance between a mixing blade plane B located at a forward position in a rotating direction of the mixing blade and a plane S passing through the center of the mixing shaft in a shaft direction, when plane B and plane S are parallel; and the mixing blade plane B is located at a more forward position in the rotating direction than the plane S; a center plane L of the mixing blade is located at a more forward position in the rotating direction than the plane S; 0.80≧Lb/La≧0.99, provided that La is a length of the cylindrical channel and Lb is a length of the mixing blade; and C/d is in the range of 0.1 to 0.4, provided that d is a diameter of the mixing blade.