US 12,741,924 B2 · Purification device

Abstract

The present invention provides a method for obtaining high-quality products. The present invention relates to a purification apparatus that purifies crystals, the purification apparatus including: a hydraulic wash column that includes a discharging port for a crystal-containing circulation slurry and a return port for a circulation liquid containing a melt of discharged crystals; a pipe that feeds a crystal-containing slurry to the hydraulic wash column; a filter that filters the crystal-containing slurry in the hydraulic wash column; a pipe that is connected to the filter and discharges a mother liquor; and a unit that melts crystals in a circulation slurry discharged through the discharging port, wherein a distance between a lower end of the filter and an average bottom surface level of the hydraulic wash column is 1000 mm or more.

Claims19

Dependent claims

A purification apparatus that purifies crystals, the purification apparatus comprising:

a hydraulic wash column that includes a discharging port for a crystal-containing circulation slurry and a return port for a circulation liquid containing a melt of discharged crystals;
a pipe that feeds a crystal-containing slurry to the hydraulic wash column;
a filter that filters the crystal-containing slurry in the hydraulic wash column;
a pipe that is connected to the filter and discharges a mother liquor;
and
a unit that melts crystals in a circulation slurry discharged through the discharging port,
wherein a distance between a lower end of the filter and an average bottom surface level of the hydraulic wash column is 1000 mm or more.

4 more elements

Dependencies are inferred from the claim text.

Purification device

Life of this patent

Purification device

Life of this patent

Abstract

Claims19