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19 条记录 (耗时 0.022 秒)

    Process for preparing copolymers of trioxane
    13.
    发明授权
    Process for preparing copolymers of trioxane 失效
    制备三恶烷共聚物的方法

    公开(公告)号：US4045415A

    公开(公告)日：1977-08-30

    申请号：US587839

    申请日：1975-06-18

    申请人： Gunter Sextro ,  Karlheinz Burg ,  Klemens Gutweiler ,  Klaus Durichen

    发明人： Gunter Sextro ,  Karlheinz Burg ,  Klemens Gutweiler ,  Klaus Durichen

    IPC分类号： B01J8/00 ,  B01J19/00 ,  C08G2/24 ,  C08G2/10 ,  C08F3/00 ,  C08F6/00

    CPC分类号： B01J19/0013 ,  B01J8/002 ,  C08G2/24 ,  B01J2219/00076 ,  B01J2219/00162 ,  B01J2219/00168 ,  B01J2219/00184 ,  Y10S526/914

    摘要： Copolymers of trioxane with cyclic acetals may be prepared by copolymerization of the monomers in solid phase. For this purpose the monomers are first mixed homogeneously in a liquid phase with a catalyst, the mixture is then solidified by cooling and finally polymerized by heating, while maintaining it in a solid phase. The liquid phase mixture is cooled to solidify it immediately after mixing and prior to development of turbidity in the liquid mixture. Cooling can be effected, for example, on a chilled rotating roll. The moulding composition, obtained after having worked up the copolymer as usual, is a suitable material for the preparation of molded semi-finished products and finished articles.

    摘要翻译： 三恶烷与环状缩醛的共聚物可以通过固相中的单体的共聚来制备。 为此，首先将单体与催化剂在液相中均匀混合，然后通过冷却使混合物固化，最后通过加热聚合，同时保持固相。 将液相混合物在混合后立即冷却，并在液体混合物中发生浑浊之前固化。 冷却可以例如在冷却的旋转辊上进行。 通常将共聚物处理后得到的成型组合物是制备成型半成品和成品的合适材料。

    Process for separating formaldehyde and trioxane
    16.
    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
    17.
    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。