PROCESS FOR THE PREPARATION OF POLYESTERS WITH HIGH RECYCLE CONTENT
    5.
    发明申请
    PROCESS FOR THE PREPARATION OF POLYESTERS WITH HIGH RECYCLE CONTENT 审中-公开
    制备高回收率聚酯的方法

    公开(公告)号:WO2013025186A1

    公开(公告)日:2013-02-21

    申请号:PCT/US2011/047559

    申请日:2011-08-12

    Abstract: Disclosed is a process for producing copolyesters with high levels of recycled content. Scrap or post-consumer poly(ethylene terephthalate) is depolymerized by methanolysis or glycolysis to produce a purified, recycled dimethyl terephthalate which can be repolymerized with 2 or more diols. The polyesters of this invention have physical properties and an appearance that is similar to polyesters prepared from virgin monomers. In addition to dimethyl terephthalate, the polyesters can be prepared from recycled ethylene glycol recovered from depolymerization of poly(ethylene terephthalate) and/or 1,4-cyclo-hexanedimethanol prepared by hydro genation of recycled dimethyl terephthalate or recovered from depolymerized polyester mixtures.

    Abstract translation: 公开了一种生产高回收含量的共聚酯的方法。 废料或消费后的聚对苯二甲酸乙二醇酯通过甲醇分解或糖酵解解聚以产生可用2个或更多个二醇重新聚合的纯化的,再循环的对苯二甲酸二甲酯。 本发明的聚酯具有类似于由原始单体制备的聚酯的物理性质和外观。 除了对苯二甲酸二甲酯之外,聚酯可以从回收的聚对苯二甲酸乙二醇酯和/或通过再循环的对苯二甲酸二甲酯的氢化或从解聚的聚酯混合物回收制备的1,4-环己二甲醇回收的回收的乙二醇制备。

    PROCESSES FOR PRODUCING TEREPHTHALIC ACID
    9.
    发明公开
    PROCESSES FOR PRODUCING TEREPHTHALIC ACID 审中-公开
    用于生产对苯二甲酸

    公开(公告)号:EP3049384A1

    公开(公告)日:2016-08-03

    申请号:EP14771714.4

    申请日:2014-09-09

    CPC classification number: C07C51/265 C07C63/26

    Abstract: Processes for producing terephthalic acid are disclosed, the processes including a step of combining in a reaction medium para-xylene, a solvent comprising water and a saturated organic acid having from 2-4 carbon atoms, and an oxygen-containing gas, at a temperature for example from about 145°C to about 175°C, in the presence of a catalyst composition comprising cobalt, manganese, zirconium, and bromine, wherein the zirconium is present in the reaction medium in an amount, for example, from 1 ppm to 50 ppm with respect to the weight of the liquid in the reaction medium.

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