Carbonylation process for the production of aromatic acids or esters
    63.
    发明授权
    Carbonylation process for the production of aromatic acids or esters 失效
    用于生产芳香酸或酯的羰基化方法

    公开(公告)号:US4654436A

    公开(公告)日:1987-03-31

    申请号:US887488

    申请日:1986-07-21

    CPC classification number: C07C51/10 C07C67/36

    Abstract: This invention relates to a novel carbonylation process for the production of aromatic carboxylic acids or esters of aromatic. More particularly, this invention relates to a process for the carbonylation of aromatic iodides or bromides with carbon monoxide in the presence of a palladium catalyst promoted with a Group VIB carbonyl and in the presence of an alcohol or water in a base reaction medium having a pKa greater than about 8. When the alcohol is used the product is the ester. When water is used the product is the carboxylic acid.

    Abstract translation: 本发明涉及用于生产芳族羧酸或芳香族酯的新型羰基化方法。 更具体地说,本发明涉及在用VIB羰基化合物促进的钯催化剂存在下,在醇或水存在下,在具有pKa的碱性反应介质中,用一氧化碳羰基化芳族碘化物或溴化物的方法 大于约8.当使用醇时,产物是酯。 当使用水时,产物是羧酸。

    Process for the separation of isophthalic acid from terephthalic acid
    64.
    发明授权
    Process for the separation of isophthalic acid from terephthalic acid 失效
    从对苯二甲酸中分离间苯二甲酸的方法

    公开(公告)号:US4391985A

    公开(公告)日:1983-07-05

    申请号:US321948

    申请日:1981-11-16

    CPC classification number: C07C51/42

    Abstract: The present invention provides a process whereby by-product isophthalic acid is easily removed from terephthalic acid. The process thus provides a terephthalic acid product of improved purity. The process involves cooling at least a portion of a hot acetic acid production stream from which precipitated terephthalic acid has been removed so as to precipitate at least a portion of the isophthalic acid dissolved therein. The precipitated isophthalic acid is then removed and the production stream is recycled to a reactor from the production of terephthalic acid. The total production stream is thereby rendered unsaturated in isophthalic acid. Following the reaction in the terephthalic acid reactor, pure terephthalic acid in the substantial absence of isophthalic acid is recovered from the production stream as a precipitate. In a preferred embodiment, the cooling step involves cooling about 15 to 75%, and, at times, perhaps up to 100%, of the total hot acetic acid production stream to a temperature below about 50.degree. C.

    Abstract translation: 本发明提供了一种方法,其中副产物间苯二甲酸容易从对苯二甲酸中除去。 因此该方法提供了改进纯度的对苯二甲酸产物。 该方法包括冷却至少一部分已经除去沉淀的对苯二甲酸的热乙酸生产物流,以使至少一部分溶解在其中的间苯二甲酸沉淀。 然后除去沉淀的间苯二甲酸,并从生产对苯二甲酸将生产流循环到反应器中。 总生产物流在间苯二甲酸中变得不饱和。 在对苯二甲酸反应器中反应后,基本上不存在间苯二甲酸的纯对苯二甲酸作为沉淀物从生产物流中回收。 在优选的实施方案中,冷却步骤包括将总热乙酸生产流的约15至75%,有时可能高达100%,冷却至低于约50℃的温度。

    Polymer compositions and articles having improved reheat characteristics
    66.
    发明授权
    Polymer compositions and articles having improved reheat characteristics 有权
    具有改进的再加热特性的聚合物组合物和制品

    公开(公告)号:US08445086B2

    公开(公告)日:2013-05-21

    申请号:US12519444

    申请日:2007-12-19

    Abstract: Polymer compositions, for example of polyethyleneterephthalate bottles or preforms, include a reheat additive which has reducing transmission/increasing absorbance across the IR region as the wavelength increases. The reheat additive may be a titanium nitride, made by a plasma vapor deposition technique. Advantageously, the material may be used at a lower level than hitherto known materials or may be used at the same levels as hitherto but provide a greater reheat effect. Example 3a shown in the figure illustrates the absorbance of a preferred material.

    Abstract translation: 聚合物组合物,例如聚对苯二甲酸乙二醇酯瓶或预型件,包括再加热添加剂,随着波长的增加,其具有降低的透射/增加的IR区域的吸光度。 再加热添加剂可以是通过等离子体气相沉积技术制成的氮化钛。 有利地,该材料可以比迄今为止已知的材料更低的水平使用,或者可以以与迄今相同的水平使用,但是提供更大的再热效果。 图中所示的实施例3a示出了优选材料的吸光度。

    Method to decrease the aldehyde content of polyesters
    69.
    发明授权
    Method to decrease the aldehyde content of polyesters 有权
    降低聚酯醛含量的方法

    公开(公告)号:US06911523B2

    公开(公告)日:2005-06-28

    申请号:US10621636

    申请日:2003-07-17

    Applicant: Mark Rule

    Inventor: Mark Rule

    CPC classification number: C08K3/22 C08G63/183 Y10S220/906 Y10T428/1352

    Abstract: A method to decrease an aldehyde content of a polyester. The method comprises incorporating an effective amount of an additive that is capable of catalyzing a hydride-transfer reaction between an organic donor molecule and an aldehyde in the polyester.

    Abstract translation: 降低聚酯醛含量的方法。 该方法包括加入有效量的能够在聚酯中催化有机供体分子和醛之间的氢化物转移反应的添加剂。

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