METHOD FOR PRODUCING CRYSTALS OF BIS-2-HYDROXYETHYL TEREPHTHALATE AND APPARATUS FOR PRODUCING CRYSTALS OF BIS-2-HYDROXYETHYL TEREPHTHALATE

A method for producing crystals of bis-2-hydroxyethyl terephthalate of the present invention includes performing a step of, with use of a crystallizer (10) that performs a crystallization operation of an aqueous solution including 20% to 30% by weight of BHET and a vacuum apparatus (32) that depress...

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Bibliographische Detailangaben
Hauptverfasser:	SUZUKI Kenji, OGAWA Ayako, FUJIWARA Taku, NISHIZAWA Daisuke
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMISTRY METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING
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Beschreibung
Zusammenfassung:	A method for producing crystals of bis-2-hydroxyethyl terephthalate of the present invention includes performing a step of, with use of a crystallizer (10) that performs a crystallization operation of an aqueous solution including 20% to 30% by weight of BHET and a vacuum apparatus (32) that depressurizes the inside of the crystallizer (10), obtaining a slurry (13) including crystals of BHET in the crystallizer (10) by adiabatically cooling the aqueous solution by evaporating water which is a solvent of the aqueous solution; and a step of obtaining the crystals of BHET and a mother liquid by supplying the slurry (13) discharged from the crystallizer (10) to a solid-liquid separator (20).