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    Thermally stable polyester, process for its preparation and its use
    2.
    发明授权
    Thermally stable polyester, process for its preparation and its use 失效
    热稳定聚酯，其制备方法及其用途

    公开(公告)号：US06841604B2

    公开(公告)日：2005-01-11

    申请号：US10295933

    申请日：2002-11-15

    Applicant: Uwe Bayer ,  Jürgen Popp ,  Thomas Wehrmeister

    Inventor： Uwe Bayer ,  Jürgen Popp ,  Thomas Wehrmeister

    IPC: C08G63/85 ,  C08K3/04 ,  C08K3/08 ,  C08K3/20 ,  C08L67/00

    CPC classification number: C08K3/04 ,  C08G63/85 ,  C08K3/08 ,  C08K2003/0881 ,  Y10T428/2913 ,  Y10T442/30 ,  Y10T442/60 ,  C08L67/02

    Abstract: A polyester with a carbon black content of up to 20% by weight, based on the polyester, is condensed, after transesterification of DMT with diol, or after esterification of terephthalic acid with diol, with the aid of a titanium-based catalyst. The carbon black is added in the form of a carbon black dispersion together with the polycondensation catalyst to the transesterification product or esterification product. The carbon black dispersion comprises gas black or furnace black and a dispersing agent, and these are dispersed in diol. The diameter of the carbon black particles is below that of carbon black particles in a polyester using an antimony compound as catalyst.

    Abstract translation: 在DMT与二醇的酯交换反应之后，或者通过钛基催化剂将对苯二甲酸与二醇酯化后，将碳黑含量高达20重量％的聚酯与基于聚酯的聚酯缩合。 将炭黑与缩聚催化剂一起以炭黑分散体的形式加入到酯交换产物或酯化产物中。 炭黑分散体包括气黑或炉黑和分散剂，并将它们分散在二醇中。 在使用锑化合物作为催化剂的聚酯中，炭黑粒子的直径低于炭黑粒子的直径。

    SEPARATING A SOLVENT FROM A NICKEL CATALYST BY DISTILLATION
    4.
    发明申请
    SEPARATING A SOLVENT FROM A NICKEL CATALYST BY DISTILLATION 审中-公开
    通过蒸馏从镍催化剂分离溶剂

    公开(公告)号：US20160168081A1

    公开(公告)日：2016-06-16

    申请号：US14904726

    申请日：2014-07-16

    Applicant: INVISTA TECHNOLOGIES S.À R.L.

    Inventor： Sudhir N.V.K. AKI ,  James M. GARNER ,  William J. TENN ,  Thomas E. VOS

    IPC: C07C253/10 ,  C07C253/34 ,  B01D3/14 ,  B01J31/18

    Abstract: A solvent is at least partially separated from a catalyst. The catalyst comprises nickel and a bidentate phosphorus-containing ligand. The method for separation involves distilling a catalyst solution. The ratio of 2-pentenenitrile to 3-pentenenitrile in distillation column bottoms is controlled to reduce the amount of 3-pentenenitrile which is isomerized to form 2-methyl-3-butenenitrile. Isomerization of 3-pentenenitrile to 2-methyl-3-butenenitrile and subsequent isomerization of 2-methyl-3-butenenitrile to 2-methyl-2-butenenitrile, and/or hydrocyanation of 2-methyl-3-butenenitrile to methylglutaronitrile represents a loss in adiponitrile yield in a process for making adiponitrile.

    Abstract translation: 溶剂至少部分地与催化剂分离。 该催化剂包括镍和二齿含磷配体。 分离方法包括蒸馏催化剂溶液。 控制蒸馏柱底部中2-戊烯腈与3-戊烯腈的比例，以减少异构化形成2-甲基-3-丁烯腈的3-戊烯腈的量。 3-戊烯腈异构化为2-甲基-3-丁烯腈，随后将2-甲基-3-丁烯腈异构化为2-甲基-2-丁烯腈，和/或2-甲基-3-丁烯腈氢化为甲基戊二烯代表损失 在己二腈的制备方法中的己二腈产率。

    REDUCTION OF ORGANONITRILE IMPURITY LEVELS IN HCN FROM AN OXYGEN ANDRUSSOW PROCESS
    5.
    发明申请
    REDUCTION OF ORGANONITRILE IMPURITY LEVELS IN HCN FROM AN OXYGEN ANDRUSSOW PROCESS 审中-公开
    从氧气和硫酸过程中减少HCN中的有机物污染物浓度

    公开(公告)号：US20160200586A1

    公开(公告)日：2016-07-14

    申请号：US14741952

    申请日：2013-12-12

    Applicant: Stewart FORSYTH ,  Aiguo LIU ,  Martin J. RENNER ,  Brent J. STAHLMAN

    Inventor： Stewart FORSYTH ,  Aiguo LIU ,  Martin J. RENNER ,  Brent J. STAHLMAN

    IPC: C01C3/02

    CPC classification number: C01C3/0212

    Abstract: The invention provides an oxygen Andrussow process for production of hydrogen cyanide from a methane-containing feedstock such as natural gas in the presence of oxygen and ammonia over a platinum catalyst, wherein the production of byproduct organonitrile impurities, such as acrylonitrile, is reduced. Limiting the content of C2 hydrocarbons in the methane feedstock in the oxygen Andrussow process, in contrast to the air Andrussow process, has been found to reduce formation of organonitriles, such as acrylonitrile. The organonitrile impurities can require additional processing for removal cause fouling of equipment, and can also contribute to hydrogen cyanide polymerization. Reduction of C2+ hydrocarbon levels to less than 2 wt %, or 1 wt %, or less than 0.1 wt %, in the methane can provide an improved yield of higher purity HCN. Reduction of C2+ hydrocarbon levels also solves the problem of polymer buildup in process equipment, reducing downtime required for cleaning when higher C2+ hydrocarbon levels are present in the reaction feed.

    Abstract translation: 本发明提供了一种用于在铂催化剂上在氧和氨存在下从含甲烷的原料例如天然气生产氰化氢的氧气Andrussow方法，其中副产物有机腈杂质如丙烯腈的生产减少。 已经发现，与空气Andrussow方法相反，限制了氧气Andrussow方法中甲烷原料中的C2烃的含量，以减少有机腈如丙烯腈的形成。 有机腈杂质可能需要额外的处理以除去设备的结垢，也可能导致氰化氢聚合。 在甲烷中将C2 +烃水平降低至小于2重量％，或1重量％或小于0.1重量％可提供更高纯度HCN的提高的产率。 降低C2 +烃水平也解决了工艺设备中聚合物积聚的问题，减少反应进料中较高的C2 +烃含量时清洗所需的停机时间。

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