EP1353984A1 - Method for separating at least one selected polymer from a mixture of polymers - Google Patents
Method for separating at least one selected polymer from a mixture of polymersInfo
- Publication number
- EP1353984A1 EP1353984A1 EP01995593A EP01995593A EP1353984A1 EP 1353984 A1 EP1353984 A1 EP 1353984A1 EP 01995593 A EP01995593 A EP 01995593A EP 01995593 A EP01995593 A EP 01995593A EP 1353984 A1 EP1353984 A1 EP 1353984A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- solvent
- solid
- polymer mixture
- solution
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
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
- C08J11/06—Recovery or working-up of waste materials of polymers without chemical reactions
- C08J11/08—Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
- B29B2017/0203—Separating plastics from plastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
- B29B2017/0213—Specific separating techniques
- B29B2017/0293—Dissolving the materials in gases or liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
- B29K2023/0608—PE, i.e. polyethylene characterised by its density
- B29K2023/0625—LLDPE, i.e. linear low density polyethylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
- B29K2023/0608—PE, i.e. polyethylene characterised by its density
- B29K2023/0633—LDPE, i.e. low density polyethylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
- B29K2023/0608—PE, i.e. polyethylene characterised by its density
- B29K2023/0641—MDPE, i.e. medium density polyethylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
- B29K2023/0608—PE, i.e. polyethylene characterised by its density
- B29K2023/065—HDPE, i.e. high density polyethylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
-
- 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
Definitions
- the invention relates to a method for separating at least one selected polymer from a polymer mixture.
- EP 0 491 836 B1 proposes the polymers LDPE (low density polyethylene, low density polyethylene), HDPE (high density polyethylene, high density polyethylene), PP (polypropylene), PS (polystyrene) and PVC (polyvinyl chloride) separate this species with suitable solvents.
- LDPE low density polyethylene, low density polyethylene
- HDPE high density polyethylene, high density polyethylene
- PP polypropylene
- PS polystyrene
- PVC polyvinyl chloride
- a method for separating at least one selected polymer from a polymer mixture comprises the steps:
- a method for separating at least one selected polymer from a polymer mixture comprises the steps:
- LDPE Low Density Polyethylene
- LLDPE linear low density polyethylene
- MDPE medium density polyethylene
- HDPE high density polyethylene
- UHDPE ultra high density Polyethylene
- PP polypropylene
- the concentration of the polymer mixture in the first solvent is preferably 2 to 40% by weight and more preferably 5 to 20% by weight.
- temperatures T1 and T2 or T3 and T4 depends on the polymers and solvents used.
- the temperature T2 should be approximately 5 to 40 ° C. and preferably approximately 10 to 30 ° C. above the temperature T1.
- the temperature T4 should also be about 5 to 40 ° C and preferably about 10 to 30 ° C above the falling temperature T3.
- the first solvent and the second solvent can be chemically identical, but the second solvent is always a "fresh" solvent and is therefore not contaminated with polymers.
- Aliphatic, aromatic or cyclic, saturated or unsaturated hydrocarbons, alcohols, carboxylic acids, amines, esters, ketones, tetrahydrofuran, dimethylformamide, dimethyl sulfoxide, N-methylpyrrolidone or mixtures thereof can be used as solvents.
- the precipitation of the solid is supported by a precipitation agent.
- the mixtures of the above-mentioned polyethylenes and polypropylene treated by the processes according to the invention contain more than 85% by weight of LDPE and LLDPE in the mother liquor, conversely less than about 20 to 30% by weight of LDPE or LLDPE are contained in the rewashed solid. This can be demonstrated by conventional techniques and is shown, for example, in the absence of a shoulder in the curve obtained with a differential scanning calorimeter (DSC curve) in the melting range of LDPE or LLDPE.
- DSC curve differential scanning calorimeter
- a mixture of 10 g LDPE, 10 g HDPE and 10 g PP is dissolved in 570 g n-dean at 155 ° C.
- a suspension is obtained by cooling to 76 ° C. This is separated into solid and mother liquor in a filter funnel. The solid is stirred at 94 ° C. for 30 minutes with 890 g of n-decane and then filtered again. The mother liquor and the washing filtrate are evaporated, the fibers are dried.
- the plastic contained in the particles contains in addition to PP and HDPE, no LDPE share, which is demonstrated by the lack of a shoulder in the DSC curve at the melting point of the pure LDPE.
- a mixture of 40 g LDPE, 40 g HDPE and 20 g PP is dissolved in 825 g n-octane at 155 ° C.
- a suspension is obtained by cooling to 76 ° C.
- This suspension is diluted with 435 g of n-octane.
- the suspension is stirred at 92 ° C. for 34 minutes and then filtered again.
- the mother liquor and the washing filtrate are evaporated, the fibers are dried.
- the plastic contained in the mother liquor consists of more than 80% by weight of LDPE.
- the plastic contained in the particles does not contain any LDPE, which is demonstrated by the lack of a shoulder in the DSC curve at the melting point of the pure LDPE.
- a mixture of 10 g LDPE, 10 g HDPE and 10 g PP is dissolved in 570 g n-dean at 155 ° C.
- a suspension is obtained by cooling to 76 ° C. This is separated into solid and mother liquor in a filter funnel. The solid is stirred at 890 g n-decane at 76 ° C. for 30 minutes and then filtered again. The mother liquor and the washing filtrate are evaporated, the fibers are dried.
- the plastic contained in the mother liquor consists of more than 80% by weight of LDPE.
- the plastic contained in the particles also contains a significant proportion of LDPE, which is demonstrated by a shoulder in the DSC curve at the melting point of the pure LDPE.
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Sustainable Development (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10062432 | 2000-12-15 | ||
DE2000162432 DE10062432A1 (en) | 2000-12-15 | 2000-12-15 | Process for separating at least one selected polymer from a polymer mixture |
PCT/DE2001/004705 WO2002048245A1 (en) | 2000-12-15 | 2001-12-14 | Method for separating at least one selected polymer from a mixture of polymers |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1353984A1 true EP1353984A1 (en) | 2003-10-22 |
Family
ID=7667204
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01995593A Withdrawn EP1353984A1 (en) | 2000-12-15 | 2001-12-14 | Method for separating at least one selected polymer from a mixture of polymers |
Country Status (8)
Country | Link |
---|---|
US (1) | US20040116563A1 (en) |
EP (1) | EP1353984A1 (en) |
JP (1) | JP2004525998A (en) |
CN (1) | CN1481412A (en) |
AU (1) | AU2002226291A1 (en) |
BR (1) | BR0116165A (en) |
DE (1) | DE10062432A1 (en) |
WO (1) | WO2002048245A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10140913A1 (en) * | 2001-08-21 | 2003-03-06 | Der Gruene Punkt Duales Syst | Process for cleaning plastics |
EP3305839A1 (en) * | 2016-10-10 | 2018-04-11 | Fraunhofer Gesellschaft zur Förderung der Angewand | Method for recycling polyolefin containing waste |
CN113396178A (en) * | 2019-02-15 | 2021-09-14 | 罗伯特·博世有限公司 | Particles for selective laser sintering, method for producing said particles and their use |
EP4074770A1 (en) * | 2021-04-15 | 2022-10-19 | Borealis AG | A process for extracting polymers from waste material |
EP4098689A1 (en) * | 2021-06-01 | 2022-12-07 | Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO | Energy efficient separation of polyolefins |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5198471A (en) * | 1989-09-11 | 1993-03-30 | Rensselaer Polytechnic Institute | Polymer recycling by selective dissolution |
DE69730368T2 (en) * | 1996-02-19 | 2005-09-01 | Atofina Research, Seneffe | Method for sorting polymers |
DE19726796A1 (en) * | 1997-06-24 | 1999-01-07 | Basf Ag | Propylene polymers |
DE19744436A1 (en) * | 1997-10-08 | 1999-04-15 | Lindner Wolfgang | Separation of polyolefin from polyolefinic polymer fraction or mixture |
DE19822234A1 (en) * | 1998-05-07 | 1999-11-18 | Stefan Bosewitz | Recovery of pure olefins from solution and separation of plastics with close precipitation temperatures |
DE19905029A1 (en) * | 1999-01-29 | 2000-11-16 | Bgb Ges Tu Berlin | Mixed polyolefin separation used for low density polyethylene and high density polyethylene in waste involves using lower alkane as solvent and different lower alkane as separation aid |
KR100565151B1 (en) * | 1999-02-04 | 2006-03-30 | 미쓰이 가가쿠 가부시키가이샤 | Polypropylene block-copolymer resin and process for producing it |
-
2000
- 2000-12-15 DE DE2000162432 patent/DE10062432A1/en not_active Withdrawn
-
2001
- 2001-12-14 US US10/450,419 patent/US20040116563A1/en not_active Abandoned
- 2001-12-14 BR BR0116165A patent/BR0116165A/en not_active Application Discontinuation
- 2001-12-14 WO PCT/DE2001/004705 patent/WO2002048245A1/en not_active Application Discontinuation
- 2001-12-14 JP JP2002549771A patent/JP2004525998A/en active Pending
- 2001-12-14 EP EP01995593A patent/EP1353984A1/en not_active Withdrawn
- 2001-12-14 AU AU2002226291A patent/AU2002226291A1/en not_active Abandoned
- 2001-12-14 CN CNA01820631XA patent/CN1481412A/en active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO0248245A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP2004525998A (en) | 2004-08-26 |
DE10062432A1 (en) | 2002-06-20 |
CN1481412A (en) | 2004-03-10 |
BR0116165A (en) | 2004-01-13 |
WO2002048245A1 (en) | 2002-06-20 |
AU2002226291A1 (en) | 2002-06-24 |
US20040116563A1 (en) | 2004-06-17 |
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