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PL411850A1 - Method for decolourising of PET polyethylene terephthalate wastes - Google Patents

Method for decolourising of PET polyethylene terephthalate wastes

Info

Publication number
PL411850A1
PL411850A1 PL411850A PL41185015A PL411850A1 PL 411850 A1 PL411850 A1 PL 411850A1 PL 411850 A PL411850 A PL 411850A PL 41185015 A PL41185015 A PL 41185015A PL 411850 A1 PL411850 A1 PL 411850A1
Authority
PL
Poland
Prior art keywords
pet
polyethylene terephthalate
extractants
carried out
stage
Prior art date
Application number
PL411850A
Other languages
Polish (pl)
Inventor
Piotr Grzybowski
Original Assignee
Rs Pet Spółka Z Ograniczoną Odpowiedzialnością
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rs Pet Spółka Z Ograniczoną Odpowiedzialnością filed Critical Rs Pet Spółka Z Ograniczoną Odpowiedzialnością
Priority to PL411850A priority Critical patent/PL411850A1/en
Priority to PCT/PL2015/000072 priority patent/WO2016159800A1/en
Publication of PL411850A1 publication Critical patent/PL411850A1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J11/00—Recovery or working-up of waste materials
    • C08J11/04—Recovery or working-up of waste materials of polymers
    • C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
    • C08J11/18—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material
    • C08J11/22—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds
    • C08J11/24—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds containing hydroxyl groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Przedmiotem zgłoszenia jest sposób odbarwiania odpadów politereftalanu etylenu PET. Wstępnie rozdrobnione kolorowe odpady PET poddaje się roztworzeniu w wysoko wrzącym alkoholu jednowodorotlenowym lub wielowodorotlenowym lub w ich mieszaninach z dodatkiem katalizatorów alkalicznych lub kwasowych, w podwyższonej temperaturze w zakresie od 150°C do 260°C. Po roztworzeniu otrzymaną masę poddaje się filtrowaniu i ochłodzeniu do temperatury powyżej 60°C. Następnie prowadzi się proces ekstrakcji pod ciśnieniem normalnym lub podwyższonym z zastosowaniem ekstrahentów w postaci rozpuszczalników organicznych o gęstości mniejszej lub większej, co najmniej o 100 kg/m3 od gęstości roztworu PET w mieszaninie roztwarzającej. Ekstrakcję prowadzi się w instalacjach jednostopniowych lub wielostopniowych w procesie okresowym lub korzystnie w procesie ciągłym. Otrzymany odbarwiony PET odprowadza się do zbiornika magazynowego (6). Zabarwione ekstrahenty poddaje się regeneracji, korzystnie przez destylację i zawraca się do kolejnego cyklu produkcyjnego.The subject of the application is a method for decolorizing polyethylene terephthalate PET waste. Pre-ground colored PET waste is dissolved in high boiling monohydric or polyhydric alcohol or in mixtures thereof with the addition of alkali or acid catalysts, at elevated temperatures ranging from 150 ° C to 260 ° C. After reconstitution, the obtained mass is subjected to filtration and cooling to a temperature above 60 ° C. The extraction process is then carried out at normal or elevated pressure with the use of extractants in the form of organic solvents with a density lower or higher, at least by 100 kg / m3 from the density of the PET solution in the pulping mixture. The extraction is carried out in single-stage or multi-stage installations in a batch process or preferably in a continuous process. The resulting deinked PET is discharged into a storage tank (6). The colored extractants are regenerated, preferably by distillation, and recycled to the next production cycle.

PL411850A 2015-04-01 2015-04-01 Method for decolourising of PET polyethylene terephthalate wastes PL411850A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL411850A PL411850A1 (en) 2015-04-01 2015-04-01 Method for decolourising of PET polyethylene terephthalate wastes
PCT/PL2015/000072 WO2016159800A1 (en) 2015-04-01 2015-04-29 The method for de-colorization of polyethylene terephthalate pet waste

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL411850A PL411850A1 (en) 2015-04-01 2015-04-01 Method for decolourising of PET polyethylene terephthalate wastes

Publications (1)

Publication Number Publication Date
PL411850A1 true PL411850A1 (en) 2016-10-10

Family

ID=53267538

Family Applications (1)

Application Number Title Priority Date Filing Date
PL411850A PL411850A1 (en) 2015-04-01 2015-04-01 Method for decolourising of PET polyethylene terephthalate wastes

Country Status (2)

Country Link
PL (1) PL411850A1 (en)
WO (1) WO2016159800A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2570019B (en) * 2018-09-17 2021-04-21 Impact Laboratories Ltd Plastic recycling process

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL209741A1 (en) 1978-09-21 1980-05-05 Politechnika Warszawska
NZ252649A (en) * 1992-05-18 1996-03-26 Petwest Pty Ltd Substituted Fo Removing contaminants from and depolymerisation of (used) polyethylene terephthalate (pet) by transesterification using ethylene glycol at elevated temperature and various purification steps to yield terephthalic acid
US6083283A (en) 1996-10-24 2000-07-04 Solutia Inc. Method for removing color from ionically dyeable polymeric materials
JP2004217871A (en) * 2003-01-17 2004-08-05 Teijin Fibers Ltd Method of recovering useful components from dyed polyester fiber
MXPA05009111A (en) 2003-02-27 2006-01-27 Petrecycle Ltd A method for the decontamination of polyethylene terephthalate.
US20060148914A1 (en) 2005-01-04 2006-07-06 Connor Daniel M Methods and compositions for decolorizing thermoplastics and articles made using such decolorized thermoplastics
US7959807B2 (en) * 2005-08-05 2011-06-14 Teijin Fibers Limited Method for recovering useful components from dyed polyester fiber
JP4537288B2 (en) * 2005-08-08 2010-09-01 帝人ファイバー株式会社 Method for recovering active ingredients from dyed polyester fiber

Also Published As

Publication number Publication date
WO2016159800A1 (en) 2016-10-06

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