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33 条记录 (耗时 0.024 秒)

    Recovery of antimony catalyst residues from bromination reaction mixtures
    12.
    发明申请
    Recovery of antimony catalyst residues from bromination reaction mixtures 失效
    从溴化反应混合物中回收锑催化剂残留物

    公开(公告)号：US20050143528A1

    公开(公告)日：2005-06-30

    申请号：US10751060

    申请日：2003-12-31

    申请人： Thanikavelu Manimaran ,  Alvin Harkins ,  Samuel Dubois ,  Thomas Callender

    发明人： Thanikavelu Manimaran ,  Alvin Harkins ,  Samuel Dubois ,  Thomas Callender

    IPC分类号： C08F6/02 ,  C08F8/20 ,  C08F8/22 ,  C08F8/00

    CPC分类号： C08F6/02 ,  C08F8/20 ,  Y02P20/584 ,  C08L25/04 ,  C08L25/18 ,  C08F12/08

    摘要： A process for brominating a styrenic polymer in an organic solvent in the presence of an antimony trihalide catalyst such that a reaction mass containing brominated styrenic polymer in an organic phase is formed is improved by mixing hydrochloric acid or hydrobromic acid, or both, with said reaction mass at least once to extract antimony catalyst residues from said reaction mass as an acidic aqueous phase. Preferably, catalyst residues are recovered from the acidic aqueous phase and still more preferably, recovered antimony trihalide catalyst residues are recycled to constitute at least a portion of the antimony trihalide catalyst used in preparing the brominated styrenic polymer.

    摘要翻译： 在三卤化锑催化剂的存在下，在有机溶剂中溴化苯乙烯类聚合物的方法，通过将盐酸或氢溴酸或二者混合，形成有机相中含有溴化苯乙烯类聚合物的反应物质， 质量至少一次以从酸性水相从所述反应物料中提取锑催化剂残余物。 优选地，从酸性水相中回收催化剂残余物，还更优选回收的三卤化锑催化剂残余物被再循环以构成用于制备溴化苯乙烯聚合物的至少一部分三卤化锑催化剂。

    Process for the preparation of tetrabromobisphenol-A
    13.
    发明授权
    Process for the preparation of tetrabromobisphenol-A 有权
    制备四溴双酚A的方法

    公开(公告)号：US06300527B1

    公开(公告)日：2001-10-09

    申请号：US09614818

    申请日：2000-07-12

    申请人： Thanikavelu Manimaran ,  Hassan Y. Elnagar ,  Richard A. Holub ,  Alvin E. Harkins, Jr. ,  Bonnie G. McKinnie

    发明人： Thanikavelu Manimaran ,  Hassan Y. Elnagar ,  Richard A. Holub ,  Alvin E. Harkins, Jr. ,  Bonnie G. McKinnie

    IPC分类号： C07C3916

    CPC分类号： C07C37/62 ,  C07C39/367

    摘要： This invention relates, inter alia, to a process for the production of tetrabromobisphenol-A by the bromination of bisphenol-A and/or underbrominated bisphenol-A, which process features: a water and water-miscible organic solvent reaction medium; a relatively high reaction temperature; and the presence, in the reaction medium, of both (i) excess unreacted Br2 during the feed of bisphenol-A to the reactor, and (ii) sufficient HBr to protect the tetrabromobisphenol-A produced against undesirable color formation. Tetrabromobisphenol-A precipitates from the reaction mass and is easily recovered. Product of high purity (97% or more) and very low color (APHA of 50 or less) can be produced, even when using large excesses of bromine in the reaction.

    摘要翻译： 本发明尤其涉及通过双酚A和/或二溴双酚A的溴化生产四溴双酚A的方法，其特征在于：水和水可混溶的有机溶剂反应介质; 相对较高的反应温度; 以及在反应介质中存在（i）在将双酚-A进料到反应器中过量的未反应Br 2的存在，和（ii）足够的HBr以保护所产生的四溴双酚A而导致不希望的颜色形成。 四溴双酚A从反应物质中沉淀出来，容易回收。 即使在反应中使用大量过量的溴，也可以生产高纯度（97％以上）和非常低的颜色（APHA为50以下）的产品。

    Enantiomeric resolution of aryl-substituted aliphatic carboxylic acids
    14.
    发明授权
    Enantiomeric resolution of aryl-substituted aliphatic carboxylic acids 失效
    芳基取代的脂族羧酸的对映异构体拆分

    公开(公告)号：US5278337A

    公开(公告)日：1994-01-11

    申请号：US960620

    申请日：1992-10-14

    申请人： Thanikavelu Manimaran ,  G. Patrick Stahly ,  R. Carl Herndon, Jr.

    发明人： Thanikavelu Manimaran ,  G. Patrick Stahly ,  R. Carl Herndon, Jr.

    IPC分类号： C07B57/00 ,  C07C51/487

    CPC分类号： C07B57/00 ,  C07C51/487

    摘要： A process for obtaining a substantially pure enantiomer of an aryl-substituted aliphatic carboxylic acid is described. The process utilizes first an enantiomerically enriched mixture the of aryl-substituted aliphatic carboxylic acid obtained from kinetic resolution, diastereomeric crystallization or asymmetric synthesis processes. This enriched mixture is reacted with a base producing a salt that has the following properties:1) has at least one eutectic point;2) a composition that is not at the eutectic point; and3) a eutectic composition that is closer to the racemic composition than is the eutectic composition of said aryl-substituted carboxylic acid.Substantially pure, enantiomeric salt is separated, leaving a mother liquor comprising the solvent and aryl-substituted aliphatic carboxylic acid enriched in the other enantiomer.

    摘要翻译： 描述了获得芳基取代的脂肪族羧酸的基本上纯的对映异构体的方法。 该方法首先利用从动力学拆分，非对映体结晶或不对称合成方法获得的芳基取代的脂族羧酸的对映体富集混合物。 该富集的混合物与产生具有以下性质的盐的碱反应：1）具有至少一个共晶点; 2）不在共晶点的组成; 和3）比所述芳基取代的羧酸的共晶组成更接近外消旋组合物的共晶组合物。 分离基本上纯的对映异构体盐，留下含有溶剂的母液和富集在另一对映异构体中的芳基取代的脂族羧酸。

    Process For Producing N-Propyl Bromide or Other Aliphatic Bromides
    15.
    发明申请
    Process For Producing N-Propyl Bromide or Other Aliphatic Bromides 有权
    生产N-丙酰溴或其他脂肪族溴的方法

    公开(公告)号：US20090054709A1

    公开(公告)日：2009-02-26

    申请号：US12296629

    申请日：2007-04-11

    申请人： James E. Torres ,  Alvin E. Harkins, JR. ,  Thanikavelu Manimaran ,  B. Gary McKinnie

    发明人： James E. Torres ,  Alvin E. Harkins, JR. ,  Thanikavelu Manimaran ,  B. Gary McKinnie

    IPC分类号： C07C17/08

    CPC分类号： C07C17/08 ,  C07C19/075

    摘要： A process for the production of an aliphatic bromide in which the bromine atom is attached to a terminal carbon atom, which process comprises continuously feeding olefin having a terminal double bond, gaseous hydrogen bromide, and a molecular oxygen-containing gas into a liquid phase reaction medium comprised of aliphatic bromide to cause anti-Markovnikov addition of HBr to terminal olefin, the feeds being proportioned and maintained to provide a molar excess of hydrogen bromide relative to terminal olefin in the range of about 1 to about 5 percent, and a molar ratio of molecular oxygen to terminal olefin of less than 0.005. The process is especially suited for production of n-propyl bromide.

    摘要翻译： 一种生产其中溴原子连接到末端碳原子上的脂族溴化物的方法，该方法包括将具有末端双键的烯烃，气态溴化氢和含分子氧的气体连续进料到液相反应 介质由脂肪族溴化物引起，使马可夫尼科夫将HBr加入到末端烯烃中，进料成比例并保持为相对于末端烯烃的摩尔过量的溴化氢为约1至约5％，摩尔比 的分子氧与末端烯烃的摩尔比小于0.005。 该方法特别适用于生产正丙基溴。

    Process for the preparation of tetrabromobisphenol-A
    20.
    发明授权
    Process for the preparation of tetrabromobisphenol-A 有权

    公开(公告)号：US06313355B1

    公开(公告)日：2001-11-06

    申请号：US09614819

    申请日：2000-07-12

    申请人： Thanikavelu Manimaran ,  Richard A. Holub ,  Randall S. Barton

    发明人： Thanikavelu Manimaran ,  Richard A. Holub ,  Randall S. Barton

    IPC分类号： C07C3916

    CPC分类号： C07C37/62 ,  C07C39/367

    摘要： Tetrabromobisphenol-A is produced in a bromination process where no bromine or only a very small proportion of bromine is fed to the reactor. In the process aqueous hydrobromic acid, is the sole source or a major source of the bromine. In the process there are at least three concurrent continuous feeds to the reactor. One is composed of bisphenol-A and/or underbrominated bisphenol-A and a water-miscible organic solvent. The second is gaseous hydrogen bromide or preferably, aqueous hydrobromic acid, and the third is aqueous hydrogen peroxide. Optionally a small additional continuous feed of bromine can be employed. The feeds are proportioned to maintain a liquid phase containing (i) from above about 15 to about 85 wt % water, based upon the amount of water and water-miscible organic solvent in such liquid phase, and (ii) an amount of unreacted bromine that is in excess over the stoichiometric amount theoretically required to convert the bisphenol-A and/or underbrominated bisphenol-A to tetrabromobisphenol-A. The tetrabromobisphenol-A continuously forms as a solids phase in a yield of at least about 90% based on bisphenol-A and/or underbrominated bisphenol-A fed. The reaction mass is agitated and/or refluxed to maintain a substantially uniform slurry in the reactor. An amount of the slurry is continuously removed so that the volume of the contents of the reactor remains substantially constant.