FEEDSTOCK RECYCLING APPARATUS FROM POLYESTER WASTES

• Main Authors: KIM, OK GI, SON, WON KEUN, HAN, MYUNG WAN, JEONG, GEUN JOONG, KANG, KYUNG SEOK, KIM, TAE IL
• Format: Patent
• Language: English; Korean
• Published: 18.09.2015
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MAKING GRANULES OR PREFORMS; METALLURGY; ORGANIC CHEMISTRY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

The present invention relates to a process and an apparatus for decomposing polyester waste and, more specifically, to a process and an apparatus for recycling polyester waste, which make polyethyleneterephthalate (PET) into raw materials of polyester, dimethyl terephthalate (DMT) and ethylene glycol (EG). A continuous melting device is: divided into a plurality of separate melting rooms to be continuously operated; equipped with a transfer device comprising an electrical or a manual screw and a check valve to transfer to the gradationally separate melting rooms; and provided with a high pressure pump which enables an EG collecting condenser capable of collecting EG easy to evaporate in a melting process and a final reactant in the melting device to be put into a first reactor. Due to the continuous melting device, which saves entire process time, reaction time, and energy lost by stopping the first reactor to put a product from the melting device into the first reactor compared with a batch melting device, the entire process speed is increased and the process time is reduced so that energy loss is minimized and the process is economically operated.