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40 条记录 (耗时 0.03 秒)

    Process for separating formaldehyde and trioxane
    4.
    发明授权
    Process for separating formaldehyde and trioxane 失效
    甲醛和三恶烷分离方法

    公开(公告)号：US5872263A

    公开(公告)日：1999-02-16

    申请号：US431100

    申请日：1995-04-28

    申请人： Michael Hoffmockel ,  Karl-Friedrich Muck ,  Gunter Sextro

    发明人： Michael Hoffmockel ,  Karl-Friedrich Muck ,  Gunter Sextro

    IPC分类号： C07C45/78 ,  C07C45/82 ,  C07C47/058 ,  C07D323/06

    CPC分类号： C07D323/06 ,  C07C45/783 ,  C07C45/82

    摘要： A process for separating a gaseous reaction mixture in the preparation of trioxane is described, in which a) the gaseous mixture leaving the reactor is scrubbed in countercurrent with an organic solvent whose boiling point is above 135.degree. C. in which the trioxane predominantly dissolves and which leaves the formaldehyde predominantly in the gas phase which is returned to the reactor, b) the trioxane together with residual formaldehyde is stripped from the solvent by distillation via a column, the overhead product being partially condensed in the temperature range from 62.degree. to 100.degree. C. c) some of the resulting condensate is applied to the column as reflux and some is taken off as product and d) the non-condensed portion is returned to the scrubbing step a).

    摘要翻译： 描述了在三恶烷制备中分离气态反应混合物的方法，其中a）离开反应器的气体混合物与沸点高于135℃的有机溶剂逆流洗涤，其中三恶烷主要溶于其中， 其主要在气相中离开甲醛，其返回到反应器中，b）通过柱蒸馏将三恶烷与残余甲醛一起从溶剂中汽提，塔顶产物在62℃至100℃的温度范围内部分冷凝 c）将一些所得的冷凝物作为回流加到塔上，一些作为产物取出，d）将未冷凝的部分返回到洗涤步骤a）。

    Process for the preparation of polyacetal copolymers
    5.
    发明授权
    Process for the preparation of polyacetal copolymers 失效
    制备聚缩醛共聚物的方法

    公开(公告)号：US5587449A

    公开(公告)日：1996-12-24

    申请号：US521998

    申请日：1995-08-31

    申请人： Dietrich Fleischer ,  Michael Hoffmockel ,  Karl-Friedrich Muck ,  Gunter Sextro

    发明人： Dietrich Fleischer ,  Michael Hoffmockel ,  Karl-Friedrich Muck ,  Gunter Sextro

    IPC分类号： C08G2/10 ,  C08G2/00 ,  C08G2/18 ,  C08G2/24 ,  C08G2/28 ,  C08G4/00

    CPC分类号： C08G2/24 ,  C08G2/00 ,  C08G2/28

    摘要： In the process for the preparation, with simultaneous end group stabilization, of polyacetal copolymers in a homogeneous phase and working up thereof, cyclic formaldehyde oligomers are copolymerized with cyclic acetals in the presence of an initiator in a polymerization reactor and immediately thereafter the initiator is deactivated by addition of basic substances, the unstable chain ends being degraded down to 0.01% to 1% in the presence of residual monomer, the product losing the majority of the residual monomer at the reactor outlet by letting down into a pelletizing device and the residual monomer which remains and the impurities dissolved in the product being removed by extraction with solvents and the product being pelletized, after drying and stabilization.

    摘要翻译： 在制备方法中，同时进行端基稳定化，聚缩醛共聚物在均相和加工中，环状甲醛低聚物在聚合反应器中在引发剂存在下与环状缩醛共聚，此后引发剂失活 通过添加碱性物质，在残留单体存在下，不稳定的链末端降解至0.01％至1％，产物通过放入造粒装置而丢失大部分残留单体，并将剩余的单体 其残留并且溶解在产物中的杂质通过用溶剂萃取除去，产物在干燥和稳定后被造粒。

    Process for preparing polyoxymethylene homo- and copolymers and apparatus suitable for this purpose
    6.
    发明申请
    Process for preparing polyoxymethylene homo- and copolymers and apparatus suitable for this purpose 审中-公开
    制备聚甲醛均聚物和共聚物的方法及适用于此目的的设备

    公开(公告)号：US20060252912A1

    公开(公告)日：2006-11-09

    申请号：US11405140

    申请日：2006-04-17

    申请人： Michael Hoffmockel ,  Matthias Kramer ,  Karl-Friedrich Muck ,  Horst Roschert

    发明人： Michael Hoffmockel ,  Matthias Kramer ,  Karl-Friedrich Muck ,  Horst Roschert

    IPC分类号： C08G65/34

    CPC分类号： C08L59/04 ,  C08G2/08 ,  C08G2/10 ,  C08L59/02

    摘要： Process for preparing polyoxymethylene homo- and copolymers and apparatus suitable for this purpose An apparatus is described for preparing polyoxymethylene homo- and copolymers. This has the following elements: A) reactor (1) encompassing a polymerization zone (2) and a deactivation zone (3) directly downstream thereof for polymerizing and deactivating polyoxymethylene homo- and copolymers in a homogeneous phase in a manner known per se, B) depressurizing assembly (4), which, if appropriate, has a metering apparatus (5) for additives for the polymer, C) pelletizer (6), D) extraction apparatus (7), and E) if appropriate, a drying apparatus (8). Use of the apparatus and of the polymerization process carried out therein can achieve particularly low residual monomer contents in a simple manner which saves energy.

    摘要翻译： 制备聚甲醛均聚物和共聚物的方法以及适用于该目的的装置描述了一种用于制备聚甲醛均聚物和共聚物的装置。 这具有以下要素：A）包含聚合区（2）和直接在其下游的失活区（3）的反应器（1），用于以本身已知的方式使均聚相中的聚甲醛均聚物和共聚物聚合和失活，B 减压组件（4），如果合适，其具有用于聚合物的添加剂的计量装置（5），C）造粒机（6），D）提取装置（7）和E）如果合适，可以使用干燥装置 8）。 在其中进行的设备和聚合方法的使用可以以简单的方式实现特别低的残留单体含量，从而节省能量。

    Process for preparation of polymer blends composed of polyoxymethylenes and of thermoplastic elastomers
    7.
    发明申请
    Process for preparation of polymer blends composed of polyoxymethylenes and of thermoplastic elastomers 失效
    由聚甲醛和热塑性弹性体组成的聚合物共混物的制备方法

    公开(公告)号：US20070060715A1

    公开(公告)日：2007-03-15

    申请号：US11520415

    申请日：2006-09-13

    申请人： Karl-Friedrich Muck ,  Ernst Hofmann ,  Michael Hoffmockel

    发明人： Karl-Friedrich Muck ,  Ernst Hofmann ,  Michael Hoffmockel

    IPC分类号： C08L71/02 ,  C08L75/04 ,  B32B27/00

    CPC分类号： C08L59/00 ,  C08L75/04 ,  Y10T428/31942 ,  C08L2666/20

    摘要： The invention relates to a process for preparation of polymer blends comprising at least one polyoxymethylene and at least one thermoplastic elastomer, where the thermoplastic elastomer is micropelletized by a pelletizing process and the pellets obtained in a) are dispersed in the polyoxymethylene matrix via melting of the components and mixing of these at low shear forces, and also to the use of micropelletized thermoplastic elastomers for preparation of polyoxymethylenes with low formaldehyde emission.

    摘要翻译： 本发明涉及一种制备包含至少一种聚甲醛和至少一种热塑性弹性体的聚合物共混物的方法，其中热塑性弹性体通过造粒工艺进行微胶体化，并且将a）中获得的颗粒分散在聚甲醛基体中， 组分和这些在低剪切力下的混合，以及使用微胶体化热塑性弹性体制备低甲醛释放的聚甲醛。

    Method for the produciton of trioxane
    9.
    发明申请
    Method for the produciton of trioxane 审中-公开
    三恶烷生产方法

    公开(公告)号：US20060058537A1

    公开(公告)日：2006-03-16

    申请号：US10538787

    申请日：2003-12-12

    申请人： Michael Haubs ,  Matthias Goring ,  Michael Hoffmockel ,  Jurgen Lingnau ,  Karl-Friedrich Muck

    发明人： Michael Haubs ,  Matthias Goring ,  Michael Hoffmockel ,  Jurgen Lingnau ,  Karl-Friedrich Muck

    IPC分类号： C07D323/06

    CPC分类号： C07D323/06

    摘要： The invention relates to a process for preparing trioxane from aqueous formaldehyde solutions in the presence of acidic catalysts. The reaction of the formaldehyde to give trioxane takes place in a reaction column equipped with a circulation evaporator, and the formaldehyde solution used as the starting solution is mixed with a sidestream from the bottom of the reaction column and fed to the upper section of the reaction column via a tubular reactor. The process is notable for a low energy requirement and little by-product formation.

    摘要翻译： 本发明涉及一种在酸性催化剂存在下由甲醛水溶液制备三恶烷的方法。 甲醛与三氧杂环己烷的反应在装有循环蒸发器的反应塔中进行，用作起始溶液的甲醛溶液与反应塔底部的侧流混合，并进料至反应的上部 柱通过管式反应器。 该过程对于低能量需求和小的副产物形成是显着的。

    Polyoxymethylene copolymers, their preparation and use
    10.
    发明申请
    Polyoxymethylene copolymers, their preparation and use 审中-公开
    聚甲醛共聚物，其制备和用途

    公开(公告)号：US20060009616A1

    公开(公告)日：2006-01-12

    申请号：US11226518

    申请日：2005-09-14

    申请人： Karl-Friedrich Muck ,  Klaus Kurz ,  Michael Hoffmockel

    发明人： Karl-Friedrich Muck ,  Klaus Kurz ,  Michael Hoffmockel

    IPC分类号： C08G65/34

    CPC分类号： C08G2/38

    摘要： Copolymers are described containing blocks of the structural repeat units of the formula I and blocks containing structural units of the formula II [—O—CH2—]x  (I), [—O—R1—]  (II), where R1 is a divalent radical derived from a hydroxy-terminated aliphatic or cycloaliphatic oligomer or polymer which, where appropriate, has ether groups and/or carbonyloxy groups in the chain, and x is a whole number, at least 10. The copolymers may be used for producing moldings.

    摘要翻译： 描述共聚物，其包含式I的结构重复单元的嵌段和含有式II的结构单元的嵌段<？in-line-formula description =“In-line Formulas”end =“lead”→[ - O-CH （I），<？in-line-formula description =“In-line Formulas”end =“tail”？> <？in-line-formula- 公式描述=“在线公式”end =“lead”？> [ - OR 1 - ]（II），<？in-line-formula description =“In-line Formulas”end = 其中R 1是衍生自羟基封端的脂族或脂环族低聚物或聚合物的二价基团，其在适当的情况下在链中具有醚基和/或羰氧基，x 是整数，至少为10.共聚物可用于生产模制品。