Patenton — panteon of patents

(19)

RU

(11)

2 458 946

(13)

C2

(51)

IPC

C08J11/10(2006-01-01)

C07C67/03(2006-01-01)

C07C69/82(2006-01-01)

C07C69/80(2006-01-01)

C07C51/23(2006-01-01)

C07C63/15(2006-01-01)

C07C63/16(2006-01-01)

C07C63/24(2006-01-01)

C07C63/26(2006-01-01)

C07C63/38(2006-01-01)

B01J19/18(2006-01-01)

(21) (22)

Application

2008130998/05, 2006-12-20

(24)

Start date

2006-12-20

(22)

Actual filing date

2006-12-20

(45)

Published

2012-08-20

(72)

Inventor

Anderson Ronal'D L.Sikkenga Dehvid L.

(73)

Holder

Bp Korporejshn Nort Amerika Ink.

METHOD FOR ETHANOLYSIS OF POLY(ETHYLENE TEREPHTHALATE) (PET) WITH FORMATION OF DIETHYLENE TEREPHTHLATE (DET) Russian patent published in 2012 - IPC C08J11/10 C07C67/03 C07C69/82 C07C69/80 C07C51/23 C07C63/15 C07C63/16 C07C63/24 C07C63/26 C07C63/38 B01J19/18 

Abstract RU 2458946 C2

FIELD: chemistry.

SUBSTANCE: invention relates to a method of processing polyethylene terephthalate wastes. The method involves ethanolysis of polyethylene terephthalate (PET), in which material containing PET reacts with ethanol. Ethylene glycol and an aromatic diethyl ester, such as diethyl isophthalate and/or diethyl terephthalate, are separated. PET or a terpolymer containing a terephthalate monomer and ethylene glycol monomers react with ethanol and ethanol, diethyl terephthalate, ethylene glycol and optionally diethyl isophthalate are separated. The separated diethyl components can undergo liquid-phase oxidation to obtain an aromatic carboxylic acid. Acetic acid can also be obtained via liquid-phase oxidation of the separated diethyl components. Aromatic carboxylic acid can be used to obtain polymers. The invention also describes apparatus for processing polyethylene terephthalate wastes. The apparatus includes a reactor, a distillation column operating at atmospheric pressure and a vacuum distillation column.

EFFECT: high efficiency of the method.

29 cl, 1 dwg, 8 tbl, 8 ex

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RU 2 458 946 C2

Authors

Anderson Ronal'D L.

Sikkenga Dehvid L.

Dates

2012-08-20—Published

2006-12-20—Filed

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