Title:
METHODS AND MATERIALS FOR DEPOLYMERIZING POLYESTERS
Document Type and Number:
WIPO Patent Application WO/2015/056377
Kind Code:
A1
Abstract:
Provided is a method of depolymerizing polyesters from post-consumer products, such as beverage bottles, to produce a high purity reaction product. For the depolymerization reaction, the polyesters are reacted with an alcohol having 2 to 5 carbons and an amine organocatalyst at a temperature of about 150 degrees C to about 250 degrees C. In one application, the use an organocatalyst with a boiling point significantly lower than the boiling point of the reactant alcohol allows for the ready recycling of the amine organocatalyst. In another application, performing the depolymerization reaction under pressure at a temperature above that of the alcohol allows for accelerated depolymerization rates and the recovery of the organocatalyst with no further heat input. In a further application, glycolytic depolymerization of poly(ethylene terephthalate) (PET) from post-consumer beverage bottles produces a pure reaction product of bis(2-hydroxyethyl)terephthalate (BHET), which may in turn be used to produce high purity beverage bottle grade PET, in a closed loop process with minimal output and waste.
Inventors:
ALLEN ROBERT DAVID (US)
BAJJURI KRISHNA MOHAN (US)
BREYTA GREGORY (US)
HEDRICK JAMES LUPTON (US)
LARSON CARL ERIC (US)
BAJJURI KRISHNA MOHAN (US)
BREYTA GREGORY (US)
HEDRICK JAMES LUPTON (US)
LARSON CARL ERIC (US)
Application Number:
PCT/JP2014/004047
Publication Date:
April 23, 2015
Filing Date:
August 01, 2014
Export Citation:
Assignee:
IBM (US)
IBM JAPAN (JP)
IBM JAPAN (JP)
International Classes:
C07C51/09; C08G63/00; C08J11/18; C08J11/24
Foreign References:
| US20120223270A1 | 2012-09-06 | |||
| JP2012072400A | 2012-04-12 |
Other References:
FUKUSHIMA, KAZUKI ET AL.: "Unexpected efficiency of cyclic amidine catalysts in depolymerizing poly(ethylene terephthalate", J. POLYM. SCI. PART A: POLYM. CHEM., vol. 51, no. 7, pages 1606 - 1611
FUKUSHIMA, KAZUKI ET AL.: "Organocatalytic Depolymerization of Poly(ethylene terephthalate", J. POLYM. SCI. PART A: POLYM. CHEM., vol. 49, 2011, pages 1273 - 1281
KAMIMURA, AKIO ET AL.: "Efficient chemical recycling of waste fiber-reinforced plastics: use of reduced amounts of dimethylaminopyridine and activated charcoal for the purification of recovered monomer", J MATER CYCLES WASTE MANAG, vol. 12, no. 2, 2010, pages 93 - 97
ACAR, ISIL ET AL.: "The Effect of Xylene as Aromatic Solvent to Aminoglycolysis of Post Consumer PET Bottles", POLYM ENG SCI, vol. 53, no. 11, 23 February 2013 (2013-02-23), pages 2429 - 2438
FUKUSHIMA, KAZUKI ET AL.: "Organocatalytic Depolymerization of Poly(ethylene terephthalate", J. POLYM. SCI. PART A: POLYM. CHEM., vol. 49, 2011, pages 1273 - 1281
KAMIMURA, AKIO ET AL.: "Efficient chemical recycling of waste fiber-reinforced plastics: use of reduced amounts of dimethylaminopyridine and activated charcoal for the purification of recovered monomer", J MATER CYCLES WASTE MANAG, vol. 12, no. 2, 2010, pages 93 - 97
ACAR, ISIL ET AL.: "The Effect of Xylene as Aromatic Solvent to Aminoglycolysis of Post Consumer PET Bottles", POLYM ENG SCI, vol. 53, no. 11, 23 February 2013 (2013-02-23), pages 2429 - 2438
Attorney, Agent or Firm:
UENO, Takeshi et al. (IBM Japan Ltd., NBF TOYOSU CANAL FRONT Bldg., 6-52, Toyosu 5-chome, Koto-k, Tokyo 11, JP)
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