EP1305360A1 - Kunststoff-recycling - Google Patents
Kunststoff-recyclingInfo
- Publication number
- EP1305360A1 EP1305360A1 EP01957963A EP01957963A EP1305360A1 EP 1305360 A1 EP1305360 A1 EP 1305360A1 EP 01957963 A EP01957963 A EP 01957963A EP 01957963 A EP01957963 A EP 01957963A EP 1305360 A1 EP1305360 A1 EP 1305360A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- acid
- aqueous solution
- alkaline
- acids
- plastic body
- 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- Withdrawn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
-
- 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
Definitions
- the invention relates to a method for processing used plastic bodies and the use of plastic materials obtained from the used plastic bodies in the production of new plastic bodies. Another object of the invention are the new plastic bodies obtained in this way due to their special properties.
- Emerging Technologies in Plastic Recycling (ACS Symp. Ser. 513), Washington: ACS, 1992, pp. 196-204 describes a process that allows 10 to 20% of the material to be made in the production of new PET bottles use used PET bottles.
- the polymeric structure of the PET (from the used PET bottles) is broken up or de-polymerized. After going through several process steps, the depolymerized material is polymerized again together with new PET starting material.
- the above methods are hardly used in practical application.
- PET bottles polyethylene terephthalate
- the used PET bottles are usually perforated and pressed in one process step.
- Appropriate measures result in crushed, for example chopped, PET.
- undesirable residues must be removed from and from the shredded PET.
- the residue can be removed, for example, by washing out with aqueous solutions. After the washing process, foreign substances (lids, labels etc.) are separated off by flotation and / or separators. The washed and dried PET is now extruded and granulated.
- the washing treatment of the comminuted plastic material is usually carried out at alkaline pH values in the presence of alkali hydroxides or other alkali donors and optionally foaming surfactants at temperatures around 90.degree.
- the washing treatment takes about 20 minutes.
- the surfactant-containing product Oakite RC 83 E from FA is already used in processes. Oaktite Europe GmbH, Trakehner Str., Frankfurt / Main dissolved in water in 1-2% concentration and used for washing treatment.
- the product contains about 40% alkali hydroxide.
- the pH of the wash liquor is around 10-11.
- the object of the present invention was to improve the processing of used plastic materials in order to achieve improved quality of the processed plastic material and possibly more favorable processing conditions.
- the present invention relates to a method for processing used plastic bodies, wherein these plastic bodies are crushed during processing and treated with an alkaline aqueous solution during and / or after the crushing process
- a complexing agent or the salt form of a complexing agent selected from the groups of amino carboxylic acids, phosphonic acids, polymeric carboxylic acids and / or c) an acid or the acid form of an acid selected from gluconic acid, lactic acid, citric acid , Glycolic acid, acetic acid, propionic
- the alkalinity dispenser a) in the alkaline-aqueous solution is between 0.01 and 10% by weight, based on the total alkaline-aqueous solution, and it is particularly preferred if the alkalinity dispenser a) is an alkali hydroxide selected from sodium - and is potassium hydroxide.
- the alkaline aqueous solution preferably has a pH greater than 9.
- the proportion of a complexing agent b) in the alkaline-aqueous solution, based on the total alkaline-aqueous solution, is preferably between 5 and 40,000 ppm.
- component b) is selected from the group of amino carboxylic acids, nitrilotriacetic acid, ethylenediaminetetraacetic acid, methylglycinediacetic acid, dicarboxymethyl-L-glutamic acid, serine diacetic acid, imidosuccinic acid and / or their salts in each case are preferably selected.
- component b) is selected from the group of polycarboxylic acids, for example polyacrylic acids and copolymers of maleic anhydride and acrylic acid and the sodium salts of these polymer acids are suitable.
- Commercial products are e.g. B. Sokalan® CP 5 and PA 30 from BASF, Alcosperse® 175 and 177 from Alco, LMW® 45 N and SPO2 ND from Norsohaas.
- Suitable native polymers include, for example, oxidized starch (e.g. DE 42 28 786) and polyamino acids such as polyglutamic acid or polyaspartic acid, e.g. B. from Cygnus, Bayer, Rohm & Haas, Rhône-Poulenc or SRCHEM.
- component b) is selected from the group of phosphonic acids, 1 hydroxyethane-1, 1-diphosphonic acid, diethylenetriaminepentamethylenephosphonic acid or ethylenediaminetetramethylenephosphonic acid and in each case their alkali metal salts are suitable.
- the acid or the salt form of the acid c) in the alkaline-aqueous solution is between 5 and 20,000 ppm, and it is particularly preferred if the acid c) is selected from gluconic acid , Lactic acid, citric acid, fatty acid with 10 to 18 carbon atoms per molecule.
- alkaline aqueous solution as defoaming component d) one or more surfactants selected from the groups the nonionic surfactants, the phosphoric acid esters and their salts and the silicone compounds.
- the proportion of surfactants d) in the alkaline-aqueous solution is preferably between 5 and 20,000 ppm.
- a 1% alkaline aqueous NaOH solution containing about 200 ppm of a defoaming component d) has a defoaming effect in the Götte test at 20-90 ° C., very particularly preferably at 50-80 ° C is detectable.
- foam is an undesirable side effect when using cleaning agents.
- the foam-forming effect of raw materials and application solutions must be checked and recorded using measuring technology.
- the defoamer test is carried out in a foam blow apparatus according to Götte (DIN 53902).
- dodecylbenzenesulfonate-triethanolamine salt can be added in 100 ppm steps and the experiment repeated under these more stringent conditions.
- dodecylbenzenesulfonate-triethanolamine salt can be added in 100 ppm steps and the experiment repeated under these more stringent conditions.
- mixed ethoxylates / propoxylates of branched or unbranched alkyl alcohols having 8 to 22 carbon atoms, very particularly preferably 12 to 22 carbon atoms, are present in the alkyl chain as nonionic surfactants.
- non-ionic surfactants end-capped ethoxylates of branched or unbranched alkyl alcohols having 8 to 22 carbon atoms, very particularly preferably 12 to 22 carbon atoms, are present in the alkyl chain, the end-group capping preferably being a butyl ether or methyl ether closure.
- alkyl polyglucosides having 8 to 14 carbon atoms in the alkyl group and 1 to 5 glucose units are present as nonionic surfactants.
- the alkaline aqueous solution can contain additional hydrotropes or solubilizing agents.
- hydrotropes or solubilizing agents additionally contained in the alkaline aqueous solution are selected from sulfonates / sulfonic acids and in particular from cumene, xylene, octyl, naphthyl and alkylbenzenesulfonates / sulfonic acids, the last If the alkyl group contains between 6 and 16 carbon atoms, or mixtures of these compounds and / or other compounds which act as solubilizers.
- the process temperature at which the comminuted plastic body is treated with the alkaline aqueous solution is between 40 and 90 ° C., particularly preferably between 60 and 80 ° C.
- the treatment time of the comminuted plastic bodies with the alkaline aqueous solution is preferably between 1 and 120 minutes, particularly preferably between 1 and 40 minutes and very particularly preferably between 5 and 15 minutes.
- plastic bodies to be treated are selected at least in part from polymers selected from polyethylene terephthalate (PET), polyethylene naphthenate (PEN), polycarbonate (PC), polyethylene (PE), polyvinyl chloride (PVC), polyamide (PA), Polyurethane (PU) exist.
- PET polyethylene terephthalate
- PEN polyethylene naphthenate
- PC polycarbonate
- PE polyethylene
- PE polyvinyl chloride
- PA polyamide
- PU Polyurethane
- the process according to the invention is preferably carried out with an alkaline aqueous solution which additionally contains at least one peroxidic compound selected from hydrogen peroxide and / or peracetic acid, perpropionic acid, persuccinic acid, perglutaric acid, peradipic acid, succinic acid, perfettic acids with 8 to 18 carbon atoms per molecule.
- at least one peroxidic compound selected from hydrogen peroxide and / or peracetic acid, perpropionic acid, persuccinic acid, perglutaric acid, peradipic acid, succinic acid, perfettic acids with 8 to 18 carbon atoms per molecule.
- a further preferred embodiment of the process is present if the alkaline aqueous solution additionally contains ester quats.
- ester quats is generally understood to mean quaternized fatty acid triethanolamine ester salts. These are known substances which can be obtained by the relevant methods of preparative organic chemistry.
- German Patent DE-C1 4308794 also discloses a process for the preparation of solid ester quats. in which the quaternization of triethanolamine esters is carried out in the presence of suitable dispersants, preferably fatty alcohols.
- R 1 CO for an acyl radical with 6 to 22 carbon atoms
- R 2 and R 3 independently of one another for hydrogen or R 1 CO
- R 4 for an alkyl radical with 1 to 4 carbon atoms or a (CH CH2 ⁇ ) q H group
- m , n and p in total stand for 0 or numbers from 1 to 12
- q stands for numbers from 1 to 12
- X stands for halide, alkyl sulfate or alkyl phosphate.
- ester quats which can be used in the context of the invention are products based on caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, isostearic acid, stearic acid, oleic acid, elaidic acid, arachic acid, behenic acid and erucic acid and also their Technical blends, such as those that occur when natural fats and oils are split.
- Technical C 2 / i8 coconut fatty acids and in particular partially hardened Ci 6/18 tallow or palm fatty acids and C 6/18 fatty acid cuts rich in elaidic acid are preferably used.
- the fatty acids and the triethanolamine can be used in a molar ratio of 1.1: 1 to 3: 1 to produce the quaternized esters.
- an application ratio of 1.2: 1 to 2.2: 1, preferably 1.5: 1 to 1.9: 1 has proven to be particularly advantageous.
- the preferred ester quats are technical mixtures of mono-, di- and triesters with an average degree of esterification of 1.5 to 1.9 and are derived from technical C ⁇ 6 / ⁇ s- tallow or. Palm fatty acid (iodine number 0 to 40).
- quaternized fatty acid triethanolamine ester salts of the formula (I) have proven to be particularly advantageous in which R 1 CO for an acyl radical having 16 to 18 carbon atoms, R 2 for R 1 CO, R 3 for hydrogen, R 4 for a methyl group , m, n and p are 0 and X is methyl sulfate.
- quaternized ester salts of fatty acids with diethanolalkylamines of the formula (II) are also suitable as esterquats.
- R 1 CO stands for an acyl radical with 6 to 22 carbon atoms
- R 2 for hydrogen or R CO
- R 4 and R 5 independently of one another for alkyl radicals with 1 to 4 carbon atoms
- m and n in total for 0 or numbers from 1 to 12
- X represents halide, alkyl sulfate or alkyl phosphate.
- ester quats are the quaternized ester salts of fatty acids with 1,2-dihydroxypropyl dialkylamines of the formula (III),
- R 4 -N + -CH 2 CHCH 2 O- (CH 2 CH 2 O) n R 2 X " (III) ie in R 1 CO for an acyl radical having 6 to 22 carbon atoms, R 2 for hydrogen or R 1 CO, R 4 , R 6 and R 7 independently of one another are alkyl radicals having 1 to 4 carbon atoms, m and n in total are 0 or numbers from 1 to 12 and X is halide, alkyl sulfate or alkyl phosphate.
- the process according to the invention is preferably carried out with an alkaline aqueous solution which contains at least fluorosurfactants as defoamers d).
- alkali hydroxide is dissolved in water in one step and to this alkaline aqueous solution one or more additives are added which contain one or more of components b) to d) and particularly preferably in the form of aqueous solutions, gel, emulsion, paste, dispersion, powder, granules, flakes, beads, tablets, block-like moldings, extrudate.
- the additives mentioned in the previous paragraph contain additional tracer substances, such as halides, for example Potassium iodide, or like fluorescent dyes, as reference substances for determining the concentration of the active substances present in the alkaline aqueous solution by, for example, ion-selective measurement or quantitative measurement of the fluorescent portions of the solution.
- additional tracer substances such as halides, for example Potassium iodide, or like fluorescent dyes
- the surface of the comminuted plastic bodies is preferably brought into contact with the alkaline aqueous solution by dipping and / or by means of auxiliary means, such as, for example, a spray device and, if appropriate, by mechanical action.
- auxiliary means such as, for example, a spray device and, if appropriate, by mechanical action.
- Another object of the present invention is that the crushed plastic bodies treated in a method according to the invention are used in the production of new plastic bodies. Due to the high quality of the shredded plastic bodies, for example, in the production of new PET bottles, more than 10%, particularly preferably more than 20%, of the PET starting material can come from the reprocessing according to the method according to the invention. The qualitative advantages that the use of material prepared according to the invention offers are evident, inter alia, from the examples.
- An object of the present invention also consists of plastic bodies which can be obtained by recycling plastic material prepared according to the invention. Depending on the proportion of material processed according to the invention and the individual conditions of the method for processing used plastic bodies, the properties of the newly produced plastic body can advantageously be set.
- the washed plastic reusable bottles for example based on PET, PEN or PC
- the automatic inspection has the disadvantage that after the washing process on the inside and / or outside surface of the reusable plastic bottles can still have drops of water left behind. Depending on the size of the water drops, this can lead to them being detected as residues due to the sensitivity of the automatic inspection device, and consequently the affected washed plastic reusable bottles to be removed. Because of this "incorrect discharge", plastic bottles are disposed of in many factories, which are actually still in perfect condition. Since the bottle pool is a very important economic asset for a beverage manufacturing company, there is a great need, the number of To keep "false discharges" as low as possible due to water droplets remaining on the surface of washed plastic reusable bottles.
- organofluorine component particularly preferably an additional organofluorine polymer, such as polytetrafluoroethylene and / or an organofluorine surfactant, has been added in the preparation process.
- Labeling adhesive synthetic resin glue with casein content
- a reusable PET bottle weighs about 80 to 100g. There is an average of about 0.5 g of labeling adhesive and about 1 g of label on a reusable PET bottle.
- the reusable PET bottles equipped in this way are subjected to identical wash cycles in the same bottle washer with highly loaded lye (COD> 10,000 mg / L) under identical conditions.
- PET bottles pretreated in this way are chopped into pieces of approx. 1 x 1 cm. About 10 g of the pieces are selected per experiment so that the proportion of labeled PET surface and labeling adhesive per test is approximately the same.
- These PET pieces are placed in 1000 ml of the inventive or the comparative solutions and stirred at 80 ° C. with a commercially available magnetic laboratory stirrer with a stirring speed of approx. 400 revolutions / min for 10 minutes. After the time has elapsed, the PET pieces are removed from the lye using a sieve.
- the inventive or the comparative solutions are alkaline aqueous solutions which contain 0.5% by weight of NaOH and 0.3% by weight of an additive A v (comparative embodiment according to the prior art) or an additive A x (inventive embodiment) ,
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)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10035780 | 2000-07-22 | ||
| DE2000135780 DE10035780A1 (de) | 2000-07-22 | 2000-07-22 | Kunststoff-Recycling |
| PCT/EP2001/008112 WO2002008324A1 (de) | 2000-07-22 | 2001-07-13 | Kunststoff-recycling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1305360A1 true EP1305360A1 (de) | 2003-05-02 |
Family
ID=7649886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01957963A Withdrawn EP1305360A1 (de) | 2000-07-22 | 2001-07-13 | Kunststoff-recycling |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1305360A1 (de) |
| DE (1) | DE10035780A1 (de) |
| PL (1) | PL365737A1 (de) |
| WO (1) | WO2002008324A1 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2003270729A1 (en) * | 2002-09-18 | 2004-04-08 | Ecolab Inc. | Additive for use in bottle washing compositions additive |
| EP2194089A1 (de) * | 2008-12-05 | 2010-06-09 | Macdermid Italiana S.R.L. | Additiv zur Verbesserung der Trennung von Polyethylenterephthalat und Polyethylen |
| US20130261197A1 (en) * | 2012-04-03 | 2013-10-03 | Luigi Bacchiocchi | Additive for Use in Wash Step of PET Recycling Process |
| CN108918450B (zh) * | 2018-08-07 | 2021-02-26 | 黄春梁 | 再生塑料的自动智能判断方法及系统 |
| DE102023005141B3 (de) | 2023-12-14 | 2025-04-17 | Exipnos GmbH | Verfahren zur Behandlung eines Polyester-Formkörpers oder einer Polyester-Schmelze und danach erhältliche Polyester-Schmelze oder Polyester-Granulat |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4134019A1 (de) * | 1991-10-15 | 1993-04-22 | Bayer Ag | Reinigung von polycarbonat- und polyester-abfaellen |
| JPH08509782A (ja) * | 1993-03-11 | 1996-10-15 | ワトソン、ダナ・エル | 廃棄物の再生処理方法およびそのための装置 |
| DE4322328A1 (de) * | 1993-07-05 | 1995-01-12 | Henkel Kgaa | Verfahren zur Eliminierung migrierter Bestandteile aus Mehrweg-Kunststoffgebinden für Lebensmittel |
| DE4407900A1 (de) * | 1994-03-09 | 1995-09-14 | Basf Magnetics Gmbh | Verfahren zur Wiedergewinnung von Rohmaterialien aus magnetischen Aufzeichnungsträgern |
| DE19531886A1 (de) * | 1995-08-30 | 1997-03-06 | Basf Magnetics Gmbh | Kontinuierlich ablaufendes Verfahren zur Wiedergewinnung von Rohmaterialien aus beschichteten Folien |
| US5840772A (en) * | 1996-09-18 | 1998-11-24 | Ppg Industries, Inc. | Methods of recycling and compositions used therein |
| DE19642600A1 (de) * | 1996-10-16 | 1998-04-23 | Henkel Ecolab Gmbh & Co Ohg | Reinigungsmittel für Kunststoff-Mehrweggebinde oder kunststoffbeschichtete Mehrwegglasgebinde sowie Verfahren zu deren Reinigung |
| DE19817160C2 (de) * | 1998-04-17 | 2001-05-17 | Rueb F A Holding Gmbh | Verfahren zur Wiederaufbereitung von siliconharzhaltigem Polyamidmaterial |
-
2000
- 2000-07-22 DE DE2000135780 patent/DE10035780A1/de not_active Ceased
-
2001
- 2001-07-13 PL PL01365737A patent/PL365737A1/xx unknown
- 2001-07-13 WO PCT/EP2001/008112 patent/WO2002008324A1/de not_active Ceased
- 2001-07-13 EP EP01957963A patent/EP1305360A1/de not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0208324A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2002008324A1 (de) | 2002-01-31 |
| PL365737A1 (pl) | 2005-01-10 |
| DE10035780A1 (de) | 2002-02-07 |
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Legal Events
| Date | Code | Title | Description |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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| 17P | Request for examination filed |
Effective date: 20030109 |
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| AK | Designated contracting states |
Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
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| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: ECOLAB INC. |
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| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: KUEPPER, STEFAN Inventor name: WERSHOFEN, THOMAS Inventor name: PREIBSCH, WOLFGANG |
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| GRAP | Despatch of communication of intention to grant a patent |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| 18D | Application deemed to be withdrawn |
Effective date: 20050831 |