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    • 1. 发明授权
    • Process for separating polyester from other materials
    • 聚酯与其他材料分离的方法
    • US06197838B1
    • 2001-03-06
    • US09327663
    • 1999-06-08
    • John A. Schwartz, Jr.Richard Perrett King
    • John A. Schwartz, Jr.Richard Perrett King
    • C08J1104
    • C08J11/16C08J11/04C08J2367/02Y02P20/143Y02W30/70Y02W30/705
    • The present invention is directed to a process for separating polyester, and particularly polyethylene terephthalate, from various contaminants and impurities. In general, the process includes the steps of contacting materials containing polyester with an alkaline composition to form a mixture. The mixture is heated causing some of the impurities to be chemically modified into a more separable form. During heating, a portion of the polyester may also be saponified. After heating, the mixture can be washed with water and the polyester can be easily separated from the remaining impurities. Through the process of the present invention, polyester can be separated and recovered from waste materials containing polyvinyl chloride and aluminum. The process is also effective at removing coatings adhered to the polyester and at removing entrained organic and inorganic compounds contained within the polyester.
    • 本发明涉及从各种污染物和杂质分离聚酯,特别是聚对苯二甲酸乙二醇酯的方法。 通常,该方法包括使包含聚酯的材料与碱性组合物接触以形成混合物的步骤。 将混合物加热,使一些杂质化学改性为更可分离的形式。 在加热期间,聚酯的一部分也可以被皂化。 加热后,混合物可用水洗涤,聚酯可以容易地与剩余的杂质分离。 通过本发明的方法,聚酯可以从含有聚氯乙烯和铝的废料中分离回收。 该方法在除去附着在聚酯上的涂层以及除去聚酯中含有的夹带的有机和无机化合物也是有效的。
    • 2. 发明授权
    • Process for recycling polyester
    • 聚酯回收工艺
    • US5395858A
    • 1995-03-07
    • US234237
    • 1994-04-28
    • John A. Schwartz, Jr.
    • John A. Schwartz, Jr.
    • C07C51/09C08J11/04
    • C07C51/09C08J11/16C08J2367/02Y02W30/705
    • A process for recycling polyester contained in waste materials is provided. The polyester is converted into ethylene glycol and terephthalic acid. The process steps generally include first combining materials containing polyester with an alkaline solution to form a slurry. The slurry is heated, causing ethylene glycol to evaporate which can then be collected. The remaining product stream is then mixed with water and filtered to remove any undissolved impurities. The aqueous filtrate can be acidified causing terephthalic acid to precipitate. Further, if silver is contained within the materials fed to the process, the silver can also be isolated and recovered.
    • 提供了一种回收废弃物中所含的聚酯的方法。 将聚酯转化为乙二醇和对苯二甲酸。 工艺步骤通常包括首先将含有聚酯的材料与碱性溶液组合以形成浆料。 加热浆料,使乙二醇蒸发,然后收集。 然后将剩余的产物流与水混合并过滤以除去任何未溶解的杂质。 可以使含水滤液酸化,使对苯二甲酸沉淀。 此外,如果将银包含在供给该方法的材料中,则也可以分离并回收银。
    • 9. 发明授权
    • Process for separating polyester from other materials
    • 聚酯与其他材料分离的方法
    • US5958987A
    • 1999-09-28
    • US631710
    • 1996-04-10
    • John A. Schwartz, Jr.Richard Perrett King
    • John A. Schwartz, Jr.Richard Perrett King
    • C08J11/06C08J11/16C08J11/04
    • C08J11/16C08J11/04C08J2367/02Y02P20/143Y02W30/70Y02W30/705
    • The present invention is directed to a process for separating polyester, and particularly polyethylene terephthalate, from various contaminants and impurities. In general, the process includes the steps of contacting materials containing polyester with an alkaline composition to form a mixture. The mixture is heated causing some of the impurities to be chemically modified into a more separable form. During heating, a portion of the polyester may also be saponified. After heating, the mixture can be washed with water and the polyester can be easily separated from the remaining impurities. Through the process of the present invention, polyester can be separated and recovered from waste materials containing polyvinyl chloride and aluminum. The process is also effective at removing coatings adhered to the polyester and at removing entrained organic and inorganic compounds contained within the polyester.
    • 本发明涉及从各种污染物和杂质分离聚酯,特别是聚对苯二甲酸乙二醇酯的方法。 通常,该方法包括使包含聚酯的材料与碱性组合物接触以形成混合物的步骤。 将混合物加热,使一些杂质化学改性为更可分离的形式。 在加热期间,聚酯的一部分也可以被皂化。 加热后,混合物可用水洗涤,聚酯可以容易地与剩余的杂质分离。 通过本发明的方法,聚酯可以从含有聚氯乙烯和铝的废料中分离回收。 该方法在除去附着在聚酯上的涂层以及除去聚酯中含有的夹带的有机和无机化合物也是有效的。