CN100503700C - 聚对苯二甲酸乙二酯的去污染方法 - Google Patents
聚对苯二甲酸乙二酯的去污染方法 Download PDFInfo
- Publication number
- CN100503700C CN100503700C CNB2004800110792A CN200480011079A CN100503700C CN 100503700 C CN100503700 C CN 100503700C CN B2004800110792 A CNB2004800110792 A CN B2004800110792A CN 200480011079 A CN200480011079 A CN 200480011079A CN 100503700 C CN100503700 C CN 100503700C
- Authority
- CN
- China
- Prior art keywords
- polyethylene terephthalate
- ethylene glycol
- pet
- terephthalate
- hydroxyethyl
- 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.)
- Expired - Lifetime
Links
- -1 polyethylene terephthalate Polymers 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 30
- 229920000139 polyethylene terephthalate Polymers 0.000 title claims description 56
- 239000005020 polyethylene terephthalate Substances 0.000 title claims description 56
- 238000005202 decontamination Methods 0.000 title description 4
- 230000003588 decontaminative effect Effects 0.000 title description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 78
- 239000000203 mixture Substances 0.000 claims abstract description 32
- 229920000642 polymer Polymers 0.000 claims abstract description 13
- 238000009835 boiling Methods 0.000 claims abstract description 5
- 239000002198 insoluble material Substances 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 16
- BCBHDSLDGBIFIX-UHFFFAOYSA-N 4-[(2-hydroxyethoxy)carbonyl]benzoic acid Chemical compound OCCOC(=O)C1=CC=C(C(O)=O)C=C1 BCBHDSLDGBIFIX-UHFFFAOYSA-N 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 abstract 3
- 229920000573 polyethylene Polymers 0.000 abstract 3
- QPKOBORKPHRBPS-UHFFFAOYSA-N bis(2-hydroxyethyl) terephthalate Chemical compound OCCOC(=O)C1=CC=C(C(=O)OCCO)C=C1 QPKOBORKPHRBPS-UHFFFAOYSA-N 0.000 abstract 1
- 239000000356 contaminant Substances 0.000 abstract 1
- UOULCEYHQNCFFH-UHFFFAOYSA-M sodium;hydroxymethanesulfonate Chemical compound [Na+].OCS([O-])(=O)=O UOULCEYHQNCFFH-UHFFFAOYSA-M 0.000 abstract 1
- 239000000047 product Substances 0.000 description 9
- 239000002594 sorbent Substances 0.000 description 7
- 239000004800 polyvinyl chloride Substances 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 229920000915 polyvinyl chloride Polymers 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000005809 transesterification reaction Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 241000611009 Nematalosa come Species 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 235000014171 carbonated beverage Nutrition 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 235000021463 dry cake Nutrition 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002195 soluble material Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000001149 thermolysis Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
从PET成分中去除污染物的方法，该方法通过将乙二醇和PET原料在乙二醇沸点左右的温度混合足够的时间将聚对苯二甲酸乙二酯成分转化成溶于乙二醇的聚对苯二甲酸乙二酯多聚体且形成双(羟乙基)对苯二甲酸酯，并生成含有不溶材料的混合产物。从混合产物中回收可溶的聚对苯二甲酸乙二酯多聚体、双(羟乙基)对苯二甲酸酯和乙二醇。
Description
相关申请的相互参考
根据35 U.S.C 119(e)，本申请要求2003年2月27日注册的美国临时申请号60/450,537的优先权。
技术领域
本发明涉及聚对苯二甲酸乙二酯(PET)的去污染方法。
背景技术
PET是一种热塑性聚酯，PET的生成可通过1，2-二羟基乙烷(“乙二醇”)和对苯二甲酸直接酯化形成双(羟乙基)对苯二甲酸酯(“BHT”)，BHT随后通过催化的酯交换反应聚合形成有用的多聚体。
传统上，因为PET可用作取向薄膜或取向纤维，具有强韧性，优良的电阻性以及低吸湿性并且其熔点大约为265℃，PET被广泛使用。人们发现PET对于碳酸饮料瓶的制造特别有价值，这些瓶子必须具有好的拉伸强度防止爆炸，并具有轻的质量便于运输和使用。聚对苯二甲酸乙二酯瓶的广泛使用产生了回收PET瓶的需要。
在美国专利号5,602,187中公开了从PET中去除污染物的方法，其内容在此被完整地引用作为参考。该专利中公开的方法均要求首先进行预处理步骤使得组分中的PET成分变脆。此后，对脆化成分进一步处理从而去除污染物。特别地，首先将PET在乙二醇中脆化随后将其粉碎，去除未被粉碎的外源塑料。粉碎后的粉末通过阻滞沉降从纸纤维和胶中分离。
该脆化步骤需要大量的时间、人力和开销以获得终产品。
对PET瓶使用的增加导致了聚氯乙烯(PVC)瓶使用的减少，因为聚氯乙烯瓶更贵且难以回收。该发展使得可利用的被回收的塑料瓶原料中的PET含量显著提高。此外，如今分选技术的提高使得原料PET比早期原料的污染程度低。进一步地，洗涤技术的提高使得这些原料中的潜在有害污染物减少。
因此，需要改进从PET原料中去除污染物的方法，以利用以上提及的这些新技术的长处。
发明内容
已经发现从PET成分中去除污染物的新方法，该方法可以充分地降低现有已知方法所需要的成本、时间和人力。更特别地，已经发现可以省略将PET成分脆化的步骤而直接将这些成分转化为可溶材料且仍然可以去除污染物，获得与脆化步骤得到的相同好的去污效果。由此，可以避免此前认为必需的脆化步骤，从而大量减少了用于转化PET使其能够回收的成本、设备和时间。
该结果通过创造性方法实现，该方法包括：在乙二醇沸点左右的温度将乙二醇和PET原料混合足够的时间，将聚对苯二甲酸乙二酯成分转化为可溶于乙二醇的聚对苯二甲酸乙二酯多聚体，并形成双(羟乙基)对苯二甲酸酯并与不溶材料生成混合产物，并随后将可溶的聚对苯二甲酸乙二酯多聚体、双(羟乙基)对苯二甲酸酯和乙二醇从混合产物中回收。
具体来说，本发明提供了一种处理含有未脆化聚对苯二甲酸乙二酯成分和污染物的组分从中去除污染物的方法，该方法省略将聚对苯二甲酸乙二酯成分脆化的步骤，该方法主要包括如下步骤：
(a)在乙二醇沸点的温度范围内将乙二醇和含有污染物的未脆化聚对苯二甲酸乙二酯混合足够的时间，从而将聚对苯二甲酸乙二酯组分转化成溶于乙二醇的聚对苯二甲酸乙二酯多聚体，并形成双(羟乙基)对苯二甲酸酯，并与不溶材料生成混合产物；
(b)从上述混合物中回收可溶的聚对苯二甲酸乙二酯多聚体、双(羟乙基)对苯二甲酸酯和乙二醇。
根据上述方法，其中所述可溶的聚对苯二甲酸乙二酯多聚体和乙二醇通过过滤从产品混合物中回收。
根据上述方法，其中所述过滤为高压过滤，压力范围为0.5-8.0巴。
根据上述方法，其中在过滤前向所述混合产物中加入选自活性碳和活性碳与活性白土的混合物的材料。
根据上述方法，其中所述的聚对苯二甲酸乙二酯转化为链长为1-5个重复单元的低聚物。
根据上述方法，其中所述可溶的聚对苯二甲酸乙二酯多聚体和乙二醇通过密度分离从产品混合物中回收。
根据上述方法，其中所述的聚对苯二甲酸乙二酯为消费后的聚对苯二甲酸乙二酯。
发明的具体说明
因此本发明提供了通过解聚PET将污染物从PET成分中去除的方法，该方法包括以下步骤：
(a)通过与乙二醇反应使含有PET的材料发生酯交换，典型地，反应在压力下由链长至少为70单位的PET寡聚体混合物，以固体薄片的形式在乙二醇沸点或其附近的温度下及反应器压力下进行，将PET转化成具有大约1至5个重复单位的寡聚体，最大质量百分比大约为3。通常，反应器的绝对压力大约为0.8至5bar。
(b)将吸附剂与酯交换步骤中的产物混合，吸附剂能够吸收混合物中的染料和其它污染物。吸附剂如活性碳和活性白土为优选。吸附剂的数量可以根据起始材料中的污染物水平变化。例如，对于相对透明的起始薄片材料，可以使用大约各为0.2％的活性碳和白土。但是，对于含有大量PVC和琥珀PET的薄片，该数量可以增加。典型地，吸附剂被混合并搅拌大约15至30分钟；
(c)随后在产物和吸附剂的混合物中加入助滤剂，并对该混合物进行压力过滤。获得干净的去污染物的滤液。
此前通过“三级”或化学方法对消费后PET的去污要求去除PVC至含量的1％以下，其中因为PVC的热分解生成的氯化氢可以被活性碳吸收由此限制了氯化氢反应颜色的生成。
本发明通过以下非限定性实施例加以说明。
实施例1
将1500lb干净的消费后薄片(已用热水清洗并通过浮/沉池分离漂浮标签和聚烯烃瓶盖等)转移至套层(jacketed)搅拌压力反应器并加入1000lb乙二醇。将温度升至210℃，压力回流升至2bar。在PET和乙二醇反应2小时产生大部分溶解的PET寡聚体后，加入额外的1000lb的乙二醇将反应物的温度从大约210℃冷却至170—180℃，乙二醇还降低了粘度。伴随着持续搅拌将15lb活性碳和15lb活性白土加入其中。
同时，通过将100b粗硅藻土在180℃悬浮于3000lb乙二醇并迅速地将一层密实硅藻土沉降于滤器叶片上准备加压叶滤机(Amafilter42V-160)。通过在压力下引入热氮气去除乙二醇来干燥滤饼(filtercake)。随后将151b精硅藻土加入反应器，将内容物通过滤器分离出吸附有色素、胶和未溶解颜料和未被酯交换的外源塑料如PVC和聚烯烃的吸附剂。回收的滤液没有颗粒。
由于对所述步骤的修改是多样的且对本领域技术人员而言是显而易见的，应当明白本发明不限于所述特定具体实施方案。
Claims (7)
1、一种处理含有未脆化聚对苯二甲酸乙二酯成分和污染物的组分从中去除污染物的方法，该方法省略将聚对苯二甲酸乙二酯成分脆化的步骤，该方法主要包括如下步骤：
(a)在乙二醇沸点的温度范围内将乙二醇和含有污染物的未脆化聚对苯二甲酸乙二酯混合足够的时间，从而将聚对苯二甲酸乙二酯组分转化成溶于乙二醇的聚对苯二甲酸乙二酯多聚体，并形成双(羟乙基)对苯二甲酸酯，并与不溶材料生成混合产物；
(b)从上述混合物中回收可溶的聚对苯二甲酸乙二酯多聚体、双(羟乙基)对苯二甲酸酯和乙二醇。
2、如权利要求1所述的方法，其中所述可溶的聚对苯二甲酸乙二酯多聚体和乙二醇通过过滤从产品混合物中回收。
3、如权利要求2所述的方法，其中所述过滤为高压过滤，压力范围为0.5-8.0巴。
4、如权利要求2所述的方法，其中在过滤前向所述混合产物中加入选自活性碳和活性碳与活性白土的混合物的材料。
5、如权利要求1所述的方法，其中所述的聚对苯二甲酸乙二酯转化为链长为1-5个重复单元的低聚物。
6、如权利要求1所述的方法，其中所述可溶的聚对苯二甲酸乙二酯多聚体、双(羟乙基)对苯二甲酸酯及其混合物通过密度分离从产品混合物中回收。
7、如权利要求1所述的方法，其中所述的聚对苯二甲酸乙二酯为消费后的聚对苯二甲酸乙二酯。
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US45053703P | 2003-02-27 | 2003-02-27 | |
| US60/450,537 | 2003-02-27 | ||
| US10/788622 | 2004-02-27 | ||
| US10/788,622 US7214723B2 (en) | 2003-02-27 | 2004-02-27 | Method for the decontamination of polyethylene terephthalate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1863855A CN1863855A (zh) | 2006-11-15 |
| CN100503700C true CN100503700C (zh) | 2009-06-24 |
Family
ID=33456722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800110792A Expired - Lifetime CN100503700C (zh) | 2003-02-27 | 2004-02-27 | 聚对苯二甲酸乙二酯的去污染方法 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US7214723B2 (zh) |
| EP (1) | EP1603861B1 (zh) |
| CN (1) | CN100503700C (zh) |
| AU (1) | AU2004315532B2 (zh) |
| BR (1) | BRPI0408055A (zh) |
| MX (1) | MXPA05009111A (zh) |
| WO (1) | WO2005079140A2 (zh) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2838941B1 (en) | 2012-04-20 | 2019-11-06 | Perpetual Global Technologies Limited | Flakes of ester mixtures and methods for their production |
| CN105074800A (zh) * | 2012-12-21 | 2015-11-18 | 艾利丹尼森公司 | 再循环处理和用于其中的标签和粘合剂 |
| PL411850A1 (pl) | 2015-04-01 | 2016-10-10 | Rs Pet Spółka Z Ograniczoną Odpowiedzialnością | Sposób odbarwiania odpadów politereftalanu etylenu PET |
| KR102325729B1 (ko) | 2018-11-28 | 2021-11-15 | 주식회사 엘지화학 | 가압 구간을 포함하는 테레프탈레이트계 조성물의 제조방법 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH550753A (it) * | 1970-11-26 | 1974-06-28 | Sir Soc Italiana Resine Spa | Procedimento per la depolimerizzazione di polietilentereftalato. |
| GB2123403A (en) * | 1982-07-09 | 1984-02-01 | Celanese Mexicana Sa | Continuous procedure for obtaining pure terephthalic acid and glycol starting from polyethylene terephthalate waste |
| JPS60248646A (ja) * | 1984-05-25 | 1985-12-09 | Toray Ind Inc | ポリエステル屑の解重合方法 |
| US5602187A (en) * | 1992-05-18 | 1997-02-11 | Swig Pty Ltd. | Polyethylene terephthalate decontamination |
| US5298530A (en) * | 1992-11-25 | 1994-03-29 | Eastman Kodak Company | Process of recovering components from scrap polyester |
| BR9406886A (pt) | 1993-07-05 | 1996-04-02 | Ici Plc | Processo para efetuar a despolimerização de poliésteres com o objetivo de recuperar o acido dicarbixilico e o diol constituintes dos poliesteres e processo para a produção de um acido dicarboxilico |
| AUPM499394A0 (en) | 1994-04-11 | 1994-05-05 | Petwest Pty Ltd | Improved polyethylene terephthalate decontamination |
| JP3808672B2 (ja) | 1999-11-26 | 2006-08-16 | 東洋製罐株式会社 | 回収ポリエチレンテレフタレート粉砕品からのテレフタル酸の工業的回収方法 |
| JPWO2003101929A1 (ja) | 2002-06-04 | 2005-09-29 | 株式会社アイエス | ビス（２−ヒドロキシエチル）テレフタレートの精製方法 |
-
2004
- 2004-02-27 AU AU2004315532A patent/AU2004315532B2/en not_active Expired
- 2004-02-27 US US10/788,622 patent/US7214723B2/en active Active
- 2004-02-27 EP EP04821424.1A patent/EP1603861B1/en not_active Expired - Lifetime
- 2004-02-27 WO PCT/IB2004/004448 patent/WO2005079140A2/en active Application Filing
- 2004-02-27 MX MXPA05009111A patent/MXPA05009111A/es active IP Right Grant
- 2004-02-27 CN CNB2004800110792A patent/CN100503700C/zh not_active Expired - Lifetime
- 2004-02-27 BR BRPI0408055 patent/BRPI0408055A/pt not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| EP1603861A4 (en) | 2007-01-17 |
| US7214723B2 (en) | 2007-05-08 |
| AU2004315532B2 (en) | 2010-01-28 |
| EP1603861B1 (en) | 2016-07-20 |
| WO2005079140A2 (en) | 2005-09-01 |
| CN1863855A (zh) | 2006-11-15 |
| MXPA05009111A (es) | 2006-01-27 |
| EP1603861A2 (en) | 2005-12-14 |
| AU2004315532A1 (en) | 2005-10-20 |
| WO2005079140A3 (en) | 2006-05-04 |
| WO2005079140A8 (en) | 2006-02-23 |
| BRPI0408055A (pt) | 2006-02-14 |
| US20040242712A1 (en) | 2004-12-02 |
| AU2004315532A8 (en) | 2008-09-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6706843B1 (en) | Method for separating and recovering dimethyl terephthalate and ethylene glycol from polyester waste | |
| WO2019001137A1 (zh) | 一种将废弃纺织物制备可应用于纺织品加工的纤维级聚酯切片的方法 | |
| EP1082375B1 (en) | Improved conversion of contaminated polyethylene terephthalate to decontaminated polybutylene terephthalate | |
| KR101561528B1 (ko) | Pet 폐기물의 화학적 재활용 방법 | |
| CA2569772C (en) | Crystallized polyethylene terephthalate, which contains silicon, and process for its preparation | |
| US20050187306A1 (en) | Process for controlled polymerization of a mixed polymer | |
| CA2136080C (en) | Improved poly ethylene terephthalate decontamination | |
| JP2005089572A (ja) | ポリブチレンテレフタレートの製造方法 | |
| CN103360260A (zh) | 一种对苯二甲酸乙二酯的制备工艺和聚酯的制备方法 | |
| CN100503700C (zh) | 聚对苯二甲酸乙二酯的去污染方法 | |
| JP2022117425A (ja) | 黒色ポリエステルフィルム及びその製造方法 | |
| CN101413156B (zh) | 氨纶丝醇解生产工艺 | |
| CN111187445A (zh) | 废旧聚酯整瓶回收方法和应用 | |
| JP2007145885A (ja) | 染着ポリエステル繊維の染料抽出解重合方法 | |
| KR20230116001A (ko) | 재활용 공정을 위한 폴리에스터 폐기물의 공급 원료 정제 | |
| KR101610768B1 (ko) | 폴리에스테르 합성 공정 슬러지의 화학적 재활용 방법 | |
| JP2023551806A (ja) | リサイクルプロセスのためのポリエステル廃棄物の原料エンジニアリング | |
| US5602187A (en) | Polyethylene terephthalate decontamination | |
| JP2001192492A (ja) | 精製熱可塑性ポリエステル樹脂の製造方法 | |
| US20230416183A1 (en) | A process for recycling of polyethylene terephthalate (pet) waste | |
| CN1216029C (zh) | 从含氧化钛或氧化铁的聚酯加乙二醇分解产物除去氧化钛或氧化铁的方法 | |
| RU2137787C1 (ru) | Способ переработки материалов, содержащих полиэтилентерефталат, с удалением загрязнений из полиэтилентерефталата (варианты) | |
| TW202400549A (zh) | 雙－（２－羥乙基）對苯二甲酸酯的製造方法及再生聚對苯二甲酸乙二酯的製造方法 | |
| JP2004277639A (ja) | 異種プラスチックの除去方法 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181112 Address after: Mauritius AI Ben Patentee after: PerPETual GLOBAL TECHNOLOGIES Ltd. Address before: Australia Melbourne Patentee before: Petrecycle Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220119 Address after: Paderborn, Germany Patentee after: Hengjin Technology Co.,Ltd. Address before: Mauritius Aiben Patentee before: PerPETual GLOBAL TECHNOLOGIES Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090624 |
|
| CX01 | Expiry of patent term |