Continuous resin recovery apparatus and recovery method

• Main Authors: NINOMIYA DAISUKE, KURASHIMA KAZUYOSHI, ETOH YASUO, MINEZAKI KUMIKO, SUMI YOSHITERU
• Format: Patent
• Language: English
• Published: 21.09.2005
• Edition: 7
• Subjects: BLASTING; CHEMISTRY; COMPOSITIONS BASED THEREON; DRYING; DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM; HEATING; LIGHTING; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; MECHANICAL ENGINEERING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WEAPONS

The present invention provides a continuous resin recovery method for recovering resin from which foreign matters and volatile components are sufficiently removed and which is highly purified and suitable for optical use. The continuous resin recovery method comprises a step of heating a resin solution in a heating pipe at a temperature at least the boiling point of the solvent, a step of introducing the resin solution heated at a temperature at least the boiling point of the solvent into a rough drying chamber maintained at a reduced pressure, a step of separating the resin from the solvent vapor in the rough drying chamber, a step of melting the separated resin, a step of introducing the molten resin in a precise drying chamber kept at a reduced pressure, and a step of passing the molten resin through a perforated plate in the precise drying chamber.