Patent ID: 7482485

Claim:
A method for extracting slurry by extracting slurry from an agitation vessel having a bottom face and a side wall and housing the slurry, characterized in that the slurry is extracted from an open end of a slurry extraction tube provided at the side wall of the agitation vessel; wherein the open end of the slurry extraction tube protrudes from the side wall of the agitation vessel in a direction toward an interior of the agitation vessel; wherein the slurry flows in the agitation vessel, and a normal line direction of a surface of the open end of the slurry extraction tube is in a direction of an angle with respect to a downstream direction of a flow of the slurry of 0° or more and less than 90°; wherein the slurry comprises terephthalic acid and water, ethylene glycol, propylene glycol, tetramethylene glycol or diethylene glycol; and wherein the slurry is extracted from the agitation vessel to another agitation vessel under a lower pressure through a difference in pressure of 0.1 MPa or more.