Recycling 2,6-naphthalenedicarboxlic acid (2, 6-NDA) contained in polyethylene naphthalate in a process to produce diesters

Recycling 2,6-naphthalenedicarboxlic acid (2, 6-NDA) contained in polyethylene naphthalate in a process to produce diesters

A process for preparing a dialkylester of a naphthalenedicarboxylic acid comprising directing a liquid phase reaction mixture comprising a low molecular weight alcohol, a naphthalenedicarboxylic acid, a dialkylester of a naphthalenedicarboxylic acid, and a polyethylene naphthalate containing materia...

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Hauptverfasser: MICHAEL J. PANZER, ALLEN B. MOSSMAN, JOHN A. MACEK, J. DEVEN CLECKLER, ROSEMARY F. MCMAHON, DAVID A. YOUNG, GREGORY P. HUSSMANN, RAYMOND J. EIFERT
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Sprache:eng
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ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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creator MICHAEL J. PANZER
ALLEN B. MOSSMAN
JOHN A. MACEK
J. DEVEN CLECKLER
ROSEMARY F. MCMAHON
DAVID A. YOUNG
GREGORY P. HUSSMANN
RAYMOND J. EIFERT
description A process for preparing a dialkylester of a naphthalenedicarboxylic acid comprising directing a liquid phase reaction mixture comprising a low molecular weight alcohol, a naphthalenedicarboxylic acid, a dialkylester of a naphthalenedicarboxylic acid, and a polyethylene naphthalate containing material, at a given temperature and pressure through series arranged reaction zones and subsequently removing a product comprising a dialkylester formed by the reaction of the naphthalenedicarboxylic acid and the polyethylene naphthalate containing material with the low molecular weight alcohol from a reaction zone. This invention is also directed to a process for preparing a purified dialkylester of a naphthalenedicarboxylic acid comprising a series of crystallization and distillation steps, and combinations thereof.
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subjects ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
title Recycling 2,6-naphthalenedicarboxlic acid (2, 6-NDA) contained in polyethylene naphthalate in a process to produce diesters
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