CARBONATE ESTER PURIFICATION METHOD, CARBONATE ESTER SOLUTION PRODUCTION METHOD, AND CARBONATE ESTER PURIFICATION APPARATUS

CARBONATE ESTER PURIFICATION METHOD, CARBONATE ESTER SOLUTION PRODUCTION METHOD, AND CARBONATE ESTER PURIFICATION APPARATUS

A carbonate ester purification apparatus including a first distillation column in which an alcohol and a first solution containing a carbonate ester and formaldehyde, or a first solution containing a carbonate ester, formaldehyde and an alcohol is supplied to obtain a distillate containing the forma...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: II Hirofumi, TAKEBAYASHI Koji, FUKUI Yuya, NAKAO Naoto, SHIMASAKI Yohei, OKANO Koji
Format: Patent
Sprache:eng
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 carbonate ester purification apparatus including a first distillation column in which an alcohol and a first solution containing a carbonate ester and formaldehyde, or a first solution containing a carbonate ester, formaldehyde and an alcohol is supplied to obtain a distillate containing the formaldehyde and the alcohol from a column top part while obtaining a carbonate ester solution with a lower content of formaldehyde than in the first solution from a column bottom part, a reactor having a catalyst for producing an acetal and/or a hemiacetal by reacting the formaldehyde to the alcohol and a reflux part refluxing a fluid containing the acetal and/or the hemiacetal to the first distillation column.