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40 条记录 (耗时 0.024 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。

    Oxymethylene copolymers and the use thereof and process for the preparation of oxymethylene copolymers
    7.
    发明授权
    Oxymethylene copolymers and the use thereof and process for the preparation of oxymethylene copolymers 失效
    甲醛共聚物及其用途和制备甲醛共聚物的方法

    公开(公告)号：US08133966B2

    公开(公告)日：2012-03-13

    申请号：US12423625

    申请日：2009-04-14

    申请人： Michael Haubs ,  Michael Hoffmockel ,  Jürgen Lingnau ,  Robert Gronner ,  Michael Gene Yearwood

    发明人： Michael Haubs ,  Michael Hoffmockel ,  Jürgen Lingnau ,  Robert Gronner ,  Michael Gene Yearwood

    IPC分类号： C08G12/00

    CPC分类号： C08G2/24 ,  C08G2/04 ,  C08G2/34

    摘要： Oxymethylene copolymers having a high proportion of terminal alkyl ether groups and having terminal hydroxyalkylene groups are described. These polymers are distinguished by high thermal stability and high hot water resistance. Furthermore, a process for the preparation of oxymethylene copolymers is described in which the polymerization of at least one monomer forming —CH2—O— units is effected in the presence of at least one acetal of formaldehyde and of at least one initiator of cationic polymerization and the initiator of cationic polymerization is used in an amount of less than or equal to 10−4 mol %, based on the amount of the monomers present at the beginning of the polymerization and forming —CH2—O— units, in which starting materials of the polymerization are used such that the content of water and formic acid at the beginning of the polymerization is less than or equal to 40 ppm, and in which the initiator and/or the active polymer chains are deactivated by treatment of the prepared polymer with a base-containing protic solvent.

    摘要翻译： 描述了具有高比例的末端烷基醚基团并具有末端羟基亚烷基的甲醛共聚物。 这些聚合物的特征在于高热稳定性和高耐热水性。 此外，描述了制备甲醛共聚物的方法，其中形成-CH 2 -O-单元的至少一种单体的聚合在至少一种甲醛缩醛和至少一种阳离子聚合引发剂的存在下进行，并且 基于聚合开始时存在的单体的量和形成-CH 2 -O-单元，阳离子聚合引发剂的用量小于或等于10-4mol％，其中起始原料为 使用聚合，使得聚合开始时的水和甲酸的含量小于或等于40ppm，并且其中引发剂和/或活性聚合物链通过用制备的聚合物处理而失活 含碱性质子溶剂。

    Process for preparation of polymer blends composed of polyoxymethylenes and of thermoplastic elastomers
    9.
    发明授权
    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：US07906594B2

    公开(公告)日：2011-03-15

    申请号：US11520415

    申请日：2006-09-13

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

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

    IPC分类号： C08L61/02

    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 producing and dehydrating cyclic formals
    10.
    发明申请
    Method for producing and dehydrating cyclic formals 审中-公开
    生产和脱水循环甲醛的方法

    公开(公告)号：US20090200153A1

    公开(公告)日：2009-08-13

    申请号：US11665047

    申请日：2005-10-06

    申请人： Reinhard Wagener ,  Michael Haubs ,  Juergen Lingnau ,  Matthias Göring ,  Michael Hoffmockel

    发明人： Reinhard Wagener ,  Michael Haubs ,  Juergen Lingnau ,  Matthias Göring ,  Michael Hoffmockel

    IPC分类号： B01D61/36

    CPC分类号： B01D61/362 ,  B01D53/22 ,  C07D317/12

    摘要： Processes are described which comprise: (a) providing a mixture comprising a cyclic formal and water, wherein the mixture has a cyclic formal concentration and a water concentration; (b) bringing the mixture into contact with an aqueously selective membrane; (c) creating a pressure differential across the membrane; and (d) obtaining a permeate having a higher water concentration and a lower cyclic formal concentration than the mixture, and a retentate having a lower water concentration and a higher cyclic formal concentration than the mixture.

    摘要翻译： 描述了方法，其包括：（a）提供包含环状缩甲醛和水的混合物，其中所述混合物具有环形形式浓度和水浓度; （b）使混合物与高选择性的膜接触; （c）跨过膜产生压力差; 和（d）获得具有比混合物更高的水浓度和较低的环状甲醛浓度的渗透物，以及具有比混合物低的水浓度和较高的环状甲醛浓度的滞留物。