Sustainable Process for the Recycling of Polyethylene Phthalate

Number of patents in Portfolio can not be more than 2000

United States of America Patent

APP PUB NO 20170253714A1
SERIAL NO

15363235

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Abstract

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A method of processing one or more streams in a phthalate-containing polymer recycling system, the method comprising receiving an extract stream and a raffinat4e stream from a liquid chromatography unit, which is part of the polymer recycling system, wherein the extract stream comprises a bis(hydroxyalkyl) phthalate monomer, C2-5 alkylene diol, and solvent, and wherein the raffinate stream comprises first impurities, C2-5 alkylene diol, and solvent; vacuum distilling the extract stream to produce a first solvent stream and a monomer and diol stream comprising the bis(hydroxyalkyl) phthalate monomer and C2-5 alkylene diol; subjecting the monomer and diol stream to steam separation to produce a monomer stream comprising the bis(hydroxyalkyl) phthalate monomer and water, and a diol stream comprising C2-5 alkylene diol and water; and vacuum distilling the raffinate stream to produce a second solvent stream and a first impurities stream comprising first impurities and C2-5 alkylene diol.

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Patent Owner(s)

Patent OwnerAddress
SABIC GLOBAL TECHNOLOGIES B VPLASTICSLAAN 1 BERGEN OP ZOOM 4612 PX

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
ASTHANA, Navinchandra Sugar Land, US 5 144
LIU, Zheng Sugar Land, US 216 748

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