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134 条记录 (耗时 0.017 秒)

    Process for Producing Trioxane and at Least One Comonomer
    72.
    发明申请
    Process for Producing Trioxane and at Least One Comonomer 审中-公开
    生产三恶烷和至少一种共聚单体的方法

    公开(公告)号：US20080283384A1

    公开(公告)日：2008-11-20

    申请号：US12091976

    申请日：2006-10-27

    申请人： Neven Lang ,  Ralf Boehling ,  Achim Stammer ,  Jan Oldenburg ,  Markus Siegert ,  Eckhard Stroefer

    发明人： Neven Lang ,  Ralf Boehling ,  Achim Stammer ,  Jan Oldenburg ,  Markus Siegert ,  Eckhard Stroefer

    IPC分类号： C08G2/10 ,  B01D3/34 ,  C07D317/12 ,  C07D323/06

    CPC分类号： C08G2/10 ,  C07D317/12 ,  C07D323/06 ,  C08G2/20 ,  Y02P20/127 ,  Y02P20/582

    摘要： The invention relates to a process for preparing trioxane and at least one comonomer for preparing (co)polymers based on trioxane, in which, in a first step, formaldehyde the at least one comonomer reactant are reacted in aqueous solution to give trioxane and comonomer, to obtain a reaction mixture A1 comprising trioxane, comonomer, formaldehyde and water, with or without comonomer reactant. In a second step, the reaction mixture A1 is distilled in a first distillation stage at a first pressure to obtain a stream B1 enriched in trioxane and comonomer and a stream B2 comprising essentially water and formaldehyde, with or without comonomer reactant. In a third step, stream B1 is distilled in a second distillation stage at a pressure which is above the pressure of the first distillation stage to obtain a stream C1 comprising trioxane, comonomer and water and a product stream C2 consisting essentially of comonomer and trioxane.

    摘要翻译： 本发明涉及一种制备三恶烷和至少一种共聚单体的方法，该共聚单体用于制备基于三恶烷的（共）聚合物，其中在第一步中，甲醛将至少一种共聚单体反应物在水溶液中反应得到三恶烷和共聚单体， 得到含有或不含共聚单体反应物的三恶烷，共聚单体，甲醛和水的反应混合物A 1。 在第二步中，将反应混合物A 1在第一压力下在第一蒸馏阶段进行蒸馏，以获得富含三恶烷和共聚单体的物流B 1和基本上含有水和甲醛的物流B 2，具有或不含共聚单体反应物。 在第三步骤中，在第二蒸馏阶段，在高于第一蒸馏阶段的压力的压力下蒸馏出料流B 1，以获得包含三恶烷，共聚单体和水的料流C 1和基本上由共聚单体组成的产物流C 2 和三恶烷。

    Process for producing oxymethylene copolymer
    73.
    发明授权
    Process for producing oxymethylene copolymer 有权
    生产甲醛共聚物的方法

    公开(公告)号：US6433128B2

    公开(公告)日：2002-08-13

    申请号：US85578101

    申请日：2001-05-16

    申请人： MITSUBISHI GAS CHEMICAL CO

    发明人： NAKAMURA TAKAHIRO ,  OKAMURA AKIRA ,  FURUKAWA MASANORI ,  MASUMOTO ISAMU ,  YOSHIOKA KANEO ,  MAJI KAZUMASA

    IPC分类号： C08G2/10 ,  C08G6/00 ,  C08G10/02

    CPC分类号： C08G2/10

    摘要： A process for producing an oxymethylene copolymer by polymerizing trioxan and 1,3-dioxolan in the presence of a cationically active catalyst, wherein(1) 1,3-dioxolan is used in an amount of 0.01 to 2.9 mol % based on trioxan; and(2) the cationically active catalyst is used in an amount of 1x10-7 to 1.2x10-4 mol based on 1 mol of trioxan. The process of the present invention makes it possible to obtain at a high yield an oxymethylene copolymer which has almost as high mechanical strength and stiffness as an oxymethylene homopolymer while retaining the tenacity and heat stability of an oxymethylene copolymer.

    摘要翻译： 一种在阳离子活性催化剂存在下聚合三氧杂环己烷和1,3-二氧戊环的甲醛共聚物的制备方法，其中（1）1,3-二氧戊环的用量相对于三烷为0.01〜2.9摩尔％ 和（2）阳离子活性催化剂的用量为1×10-7至1.2×10-4摩尔，相对于1摩尔的trioxan。 本发明的方法可以高效率地获得具有与甲醛均聚物几乎具有几乎相同的机械强度和刚度的甲醛共聚物，同时保持甲醛共聚物的强度和热稳定性。

    Thermally stable polyoxymethylene copolymer
    74.
    发明授权
    Thermally stable polyoxymethylene copolymer 失效
    热稳定性聚甲醛共聚物

    公开(公告)号：US5837781A

    公开(公告)日：1998-11-17

    申请号：US804507

    申请日：1997-02-24

    申请人： Noritaka Tanimura ,  Yukio Tanigawa

    发明人： Noritaka Tanimura ,  Yukio Tanigawa

    IPC分类号： C08G2/10 ,  C08G2/18 ,  C08G2/24 ,  C08L61/02 ,  C08G4/00 ,  C08G6/00

    CPC分类号： C08G2/24

    摘要： A polyoxymethylene copolymer prepared by copolymerizing a mixture comprising trioxane and 1,3-dioxolane in the presence of at least one polymerization catalyst selected from the group consisting of boron trifluoride, a boron trifluoride hydrate and a coordination complex compound of an organic compound containing an oxygen atom or a sulfur atom with boron trifluoride, wherein the 1,3-dioxolane has a 2-methyl-1,3-dioxolane content of not more than 500 ppm by weight and a 1,3-dioxolane peroxide content of not more than 15 ppm by weight in terms of hydrogen peroxide, and contains at least one hindered phenol in an amount of from 10 to 500 ppm by weight, each based on the weight of the 1,3-dioxolane.

    摘要翻译： 在选自三氟化硼，三氟化硼水合物和含有氧的有机化合物的配位络合物的至少一种聚合催化剂的存在下共聚含有三恶烷和1,3-二氧戊环的混合物制备的聚甲醛共聚物 原子或硫原子与三氟化硼反应，其中1,3-二氧戊环的2-甲基-1,3-二氧戊环含量不超过500重量ppm，1,3-二氧戊环过氧化物含量不超过15 以过氧化氢计，按重量计，含有至少一种量为10-500ppm（重量）的受阻苯酚，各自以1,3-二氧戊环的重量计。

    Process for the preparation of polyacetals
    75.
    发明授权
    Process for the preparation of polyacetals 失效
    制备聚缩醛的方法

    公开(公告)号：US5608030A

    公开(公告)日：1997-03-04

    申请号：US290377

    申请日：1994-08-15

    申请人： Michael Hoffmockel ,  Karl-Friedrich M uck ,  Helmut Schlaf ,  Karlheinz Burg

    发明人： Michael Hoffmockel ,  Karl-Friedrich M uck ,  Helmut Schlaf ,  Karlheinz Burg

    IPC分类号： B01J19/24 ,  C08G2/00 ,  C08G2/10 ,  C08G2/30 ,  C08G63/78

    CPC分类号： B01J19/2415 ,  C08G2/10 ,  C08G2/30 ,  B01J2219/00162 ,  B01J2219/00166

    摘要： Process for continuous preparation of homo- and copolyoxymethylenes with stable end groups in a homogeneous phase, in which in a tubular reactor with static mixing elements cyclic formaldehyde oligomers are polymerized in the presence of protonic acids as initiators in amounts of 0.005 to 500 ppm in a polymerization zone, in which the residence time of the reaction components in this zone is 0.1 to 10 min and in which the initiator is deactivated immediately after polymerization, there being a fluid transition between the polymerization and deactivator zones which is determined solely by the addition of deactivator, and in which, besides deactivation, stabilization of the chain ends is carried out in the presence of residual monomers, with the volatile constituents being removed from the reaction mixture in a subsequent vent unit. Stabilization is carried out in the presence of alkaline substances, either at temperatures of 150.degree. C. to 250.degree. C., if necessary in the presence of water or primary alcohols, or at 175.degree. C. to 250.degree. C. in the absence of these additives.

    摘要翻译： 在均相中连续制备具有稳定端基的均聚和共聚氧亚甲基的方法，其中在具有静态混合元件的管式反应器中，环状甲醛低聚物在质子酸作为引发剂存在下聚合，其量为0.005-500ppm 聚合区，其中反应组分在该区域中的停留时间为0.1至10分钟，其中引发剂在聚合后立即失活，在聚合和失活区之间存在流体转变，其仅通过加入 除去失活之外，在残留单体的存在下进行链端的稳定化，其中挥发性成分在随后的通风单元中从反应混合物中除去。 在碱性物质的存在下，如果需要，在水或伯醇的存在下，或在175℃至250℃下，在不存在碱的条件下，在碱性物质的存在下，在150℃至250℃的温度下进行稳定化 的这些添加剂。

    Process for producing oxymethylene copolyer
    79.
    发明授权
    Process for producing oxymethylene copolyer 失效
    生产甲醛共聚物的方法

    公开(公告)号：US4681927A

    公开(公告)日：1987-07-21

    申请号：US866959

    申请日：1986-05-27

    申请人： Toshikazu Umemura ,  Isamu Masumoto ,  Yukihiro Iha

    发明人： Toshikazu Umemura ,  Isamu Masumoto ,  Yukihiro Iha

    IPC分类号： C08G2/00 ,  C08G2/18 ,  C08G2/22 ,  C08G2/24 ,  C08G2/10 ,  C08G2/16

    CPC分类号： C08G2/18

    摘要： A process for producing an oxymethylene copolymer by copolymerizing trioxane with at least one cyclic comonomer selected from the group consisting of cyclic ethers and cyclic formals, said process comprising (1) polymerizing trioxane alone or with a cyclic comonomer in the presence of a polymerization catalyst until the conversion of trioxane reaches 10 to 95%, and(2) thereafter adding a cyclic comonomer and a polymerization catalyst to the reaction system and continuing the polymerization.

    摘要翻译： 一种通过将三恶烷与至少一种选自环醚和环状缩甲醛的环状共聚单体共聚制备甲醛共聚物的方法，所述方法包括（1）在聚合催化剂存在下单独或与环状共聚单体聚合三恶烷直到 三恶烷的转化率达到10〜95％，（2）向反应体系中加入环状共聚单体和聚合催化剂，继续聚合。