JP2002167341A5 - - Google Patents
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- JP2002167341A5 JP2002167341A5 JP2000362784A JP2000362784A JP2002167341A5 JP 2002167341 A5 JP2002167341 A5 JP 2002167341A5 JP 2000362784 A JP2000362784 A JP 2000362784A JP 2000362784 A JP2000362784 A JP 2000362784A JP 2002167341 A5 JP2002167341 A5 JP 2002167341A5
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- depolymerization
- alkylene glycol
- difficult
- oil
- 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.)
- Granted
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- -1 alkylene glycol Chemical compound 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000012691 depolymerization reaction Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229910017464 nitrogen compound Inorganic materials 0.000 description 1
- 150000002830 nitrogen compounds Chemical class 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Description
【００１８】
工程（ａ）においては、前処理工程を通過したポリエステル繊維固形物を公知の解重合触媒、公知の触媒濃度で１２０〜２１０℃の温度下、過剰のアルキレングリコール中で解重合反応させる。ここで、該アルキレングリコールの温度が１２０℃未満であると、解重合時間が非常に長くなり効率的ではなくなる。一方、２１０℃を越えると該繊維屑に含まれる油剤等の熱分解が顕著になり、分解して発生した窒素化合物等が回収モノマーに分散して後の精製工程では分離困難となる。該温度は好ましくは、１４０〜１９０℃である。既存のケミカルリサイクル技術では高温での操作を必要とするため、油剤の混入への対応が困難であった。[0018]
In step (a), the polyester fiber solid that has passed through the pretreatment step is subjected to a depolymerization reaction in a known depolymerization catalyst, an excess of alkylene glycol at a known catalyst concentration at a temperature of 120 to 210 ° C. Here, if the temperature of the alkylene glycol is less than 120 ° C., the depolymerization time becomes very long and it is not efficient. On the other hand, if the temperature exceeds 210 ° C. , the thermal decomposition of the oil agent and the like contained in the fiber waste becomes remarkable, and the nitrogen compound etc. generated by the decomposition disperses in the recovered monomer and it becomes difficult to separate in the subsequent purification step. The temperature is preferably 140-190 ° C. Since the existing chemical recycling technology requires high temperature operation, it has been difficult to cope with the mixing of the oil.
Priority Applications (11)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000362784A JP4065658B2 (en) | 2000-11-29 | 2000-11-29 | Method for recovering active ingredients from polyethylene terephthalate fiber waste |
| TW90128842A TW528773B (en) | 2000-11-27 | 2001-11-21 | Dimethyl terephthalate composition and process for producing the same |
| AU2002224082A AU2002224082B2 (en) | 2000-11-27 | 2001-11-22 | Dimethyl terephthalate composition and process for producing the same |
| KR1020037006969A KR100746678B1 (en) | 2000-11-27 | 2001-11-22 | Terephthalate dimethyl composition and preparation method thereof |
| MXPA03004661A MXPA03004661A (en) | 2000-11-27 | 2001-11-22 | Dimethyl terephthalate composition and process for producing the same. |
| AU2408202A AU2408202A (en) | 2000-11-27 | 2001-11-22 | Dimethyl terephthalate composition and process for producing the same |
| HK04104846.4A HK1061840B (en) | 2000-11-27 | 2001-11-22 | Dimethyl terephthalate composition and process for porducing the same |
| EP01997193.6A EP1344765B1 (en) | 2000-11-27 | 2001-11-22 | Process for producing a dimethyl terephthalate composition |
| US10/432,822 US7078440B2 (en) | 2000-11-27 | 2001-11-22 | Dimethyl terephthalate composition and process for producing the same |
| CNB018212786A CN1234676C (en) | 2000-11-27 | 2001-11-22 | dimethyl terephthalate composition and process for producing the same |
| PCT/JP2001/010241 WO2002042253A1 (en) | 2000-11-27 | 2001-11-22 | Dimethyl terephthalate composition and process for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000362784A JP4065658B2 (en) | 2000-11-29 | 2000-11-29 | Method for recovering active ingredients from polyethylene terephthalate fiber waste |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2002167341A JP2002167341A (en) | 2002-06-11 |
| JP2002167341A5 true JP2002167341A5 (en) | 2004-11-04 |
| JP4065658B2 JP4065658B2 (en) | 2008-03-26 |
Family
ID=18833998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000362784A Expired - Lifetime JP4065658B2 (en) | 2000-11-27 | 2000-11-29 | Method for recovering active ingredients from polyethylene terephthalate fiber waste |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4065658B2 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE60103074T2 (en) | 2001-12-13 | 2005-04-21 | Overseas Diamonds Technologies | Device for generating data for the determination of properties of gemstones and method for the determination of properties of gemstones |
| US6786733B2 (en) | 2002-10-15 | 2004-09-07 | Overseas Diamonds Inc. | Computer-implemented method of and system for teaching an untrained observer to evaluate a gemstone |
| 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 |
| CN101616971B (en) * | 2007-02-23 | 2012-11-07 | 帝人纤维株式会社 | Method for separation/removal of foreign material from polyester fiber waste |
| JP2010090184A (en) * | 2008-10-03 | 2010-04-22 | Teijin Fibers Ltd | Method for removing dye from dyed polyalkylene terephthalate fiber |
| JP5134563B2 (en) * | 2009-02-02 | 2013-01-30 | 帝人株式会社 | Method for removing foreign materials from polyalkylene terephthalate fibers |
| CN115181358B (en) * | 2022-06-30 | 2023-05-16 | 重庆长安汽车股份有限公司 | Waste polyester cotton fabric modified reinforced polypropylene composite material and preparation method thereof |
| WO2024117056A1 (en) * | 2022-11-29 | 2024-06-06 | 帝人フロンティア株式会社 | Method for recovering polyester and method for manufacturing recycled polyester |
| CN116410085A (en) * | 2023-01-13 | 2023-07-11 | 济宁长兴塑料助剂有限公司 | Process for preparing DOTP from polyester waste cloth |
-
2000
- 2000-11-29 JP JP2000362784A patent/JP4065658B2/en not_active Expired - Lifetime
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