公开(公告)号：US07713387B2

公开(公告)日：2010-05-11

申请号：US10583698

申请日：2004-12-21

申请人： Markus Siegert ,  Neven Lang ,  Eckhard Ströfer ,  Achim Stammer ,  Thorsten Friese ,  Hans Hasse

发明人： Markus Siegert ,  Neven Lang ,  Eckhard Ströfer ,  Achim Stammer ,  Thorsten Friese ,  Hans Hasse

IPC分类号： B01D3/00 ,  C07D323/06 ,  C07C45/78

CPC分类号： C07D323/06

摘要： A process for removing trioxane from a use stream I of formaldehyde, trioxane and water, by a) providing a use stream I of formaldehyde as the main component and trioxane and water as the secondary components, b) mixing the use stream I with a recycle stream VII to obtain a feed stream Ia, c) distilling the use stream Ia in a first distillation stage to obtain a stream II of formaldehyde as the main component and water as the secondary component, and a stream III of trioxane as the main component and water and formaldehyde as the secondary components, d) distilling the stream III in a second distillation stage having a pressure higher than in the first distillation stage, to obtain a stream IV of trioxane and a stream V of trioxane as the main component and water and formaldehyde as the secondary components, e) distilling the stream V in a third distillation stage to obtain a stream VI of water and the recycle stream VII of trioxane as the main component and water and formaldehyde as the secondary components.

摘要翻译： 一种从甲醛，三恶烷和水的使用流I中除去三恶烷的方法，通过以下步骤：a）提供以甲醛为主要成分的使用流I和作为第二组分的三恶烷和水，b）将使用流I与再循环 流VII以获得进料流Ia，c）在第一蒸馏阶段中蒸馏出使用流Ia以获得作为主要组分的甲醛的流II和作为第二组分的水，以及作为主要组分的三恶烷的流III和 水和甲醛作为次要组分，d）在具有高于第一蒸馏阶段的压力的第二蒸馏阶段中蒸馏料流III，得到三恶烷的流IV和三恶烷的流V作为主要成分， 甲醛作为次要组分，e）在第三蒸馏阶段中蒸馏物流V以获得水的流VI和三恶烷的再循环流VII作为主要成分，水和甲醛为t 他的次要成分。

公开(公告)号：US20080234459A1

公开(公告)日：2008-09-25

申请号：US12064893

申请日：2006-08-25

申请人： Neven Lang ,  Knut Zollner ,  Achim Stammer ,  Elmar Stockelmann

发明人： Neven Lang ,  Knut Zollner ,  Achim Stammer ,  Elmar Stockelmann

IPC分类号： C08G65/08

CPC分类号： C08G2/10 ,  C07D323/06 ,  C08G2/28 ,  Y02P20/582

摘要： A process for preparing polyoxymethylene homopolymers or copolymers by homopolymerization or copolymerization of trioxane or additionally of suitable comonomers, in which trioxane which still comprises residual monomers is firstly prepared in a monomer plant and is degassed in one or more stages to give one or more vapor streams (13, 14) which are, if appropriate, fed to a condenser (K) in which the condensable fractions of these vapor streams are condensed to give a condensate (15) which is recycled to the polymerization reactor (P) and one or more gaseous, formaldehyde-comprising streams (16) and also a partially degassed polyoxymethylene homopolymer or copolymer (17) which is fed to an extruder (E) or kneader and is mixed with customary additives and processing aids in this to give a polymer melt (19) and extraction of a formaldehyde-comprising extruder or kneader offgas (18) from the extruder (E) or kneader, wherein the formaldehyde-comprising secondary streams (14, 16, 18) from the polymer plant are recycled directly without addition of auxiliaries to the monomer plant, is proposed

摘要翻译： 通过三恶烷或另外合适的共聚单体的均聚或共聚制备聚甲醛均聚物或共聚物的方法，其中仍然包含残余单体的三恶烷首先在单体植物中制备，并在一个或多个阶段中脱气以产生一种或多种蒸气流 （13,14），如果合适的话，它们被供给到冷凝器（K），在该冷凝器（K）中这些蒸汽流的可冷凝馏分被冷凝，得到一个冷凝物（15），其被循环到聚合反应器（P）和一个或多个 气态的含甲醛的物流（16），以及部分脱气的聚甲醛均聚物或共聚物（17），其被输送到挤出机（E）或捏合机中，并与常规添加剂和加工助剂混合，得到聚合物熔体（19 ）和从挤出机（E）或捏合机中提取含甲醛的挤出机或捏合机废气（18），其中含甲醛的二次流（14,16 ，18）从聚合物植物中直接回收而不添加助剂到单体植物

公开(公告)号：US07390932B2

公开(公告)日：2008-06-24

申请号：US10547440

申请日：2004-03-03

申请人： Eckard Stroefer ,  Neven Lang ,  Ulrich Steinbrenner ,  Hans Hasse ,  Michael Ott ,  Thomas Grützner

发明人： Eckard Stroefer ,  Neven Lang ,  Ulrich Steinbrenner ,  Hans Hasse ,  Michael Ott ,  Thomas Grützner

IPC分类号： C07C45/78

CPC分类号： C07C45/002 ,  C07C45/82 ,  C07C47/04

摘要： Process for preparing high-concentration gaseous formaldehyde having a molar CH2O:H2O ratio of ≧0.6 from an aqueous formaldehyde solution by evaporation of at least part of the solution, in which the aqueous formaldehyde solution is heated to a vaporization temperature T and the gas phase formed is taken off, wherein the evaporation temperature T obeys the relationship: T[° C.]≧T′min[° C.] where T′min(c)=A+B×(c/100)+C×(c/100)2+D×(c/100)3 and A=+68.759, B=+124.77, C=−12.851, D=−10.095, where c is the instantaneous CH2O content of the aqueous formaldehyde solution during the evaporation in percent by weight and is from 20 to 99% by weight.

摘要翻译： 从甲醛水溶液中制备具有摩尔CH 2 H 2 O:H 2 O 2比值> 0.6的高浓度气态甲醛的方法，通过蒸发至少部分 溶液，其中将甲醛水溶液加热至汽化温度T，取出形成的气相，其中蒸发温度T遵循以下关系：<？in-line-formula description =“In-line formula”end = “lead”？> T [°C]> = T'分钟<°C。<？in-line-formula description =“In-line Formulas”end =“tail”？> 其中T'分钟（c）= A + Bx（c / 100）+ Cx（c / 100）2 + Dx（c / 100） / SUP>和A = + 68.759，B = + 124.77，C = -12.851，D = -10.095，其中c是蒸发期间甲醛水溶液的瞬时CH 2 O 2含量百分比 为20〜99重量％。

公开(公告)号：US07342139B2

公开(公告)日：2008-03-11

申请号：US10588662

申请日：2005-02-10

申请人： Bernd Rumpf ,  Eckhard Ströfer ,  Ortmund Lang ,  Neven Lang

发明人： Bernd Rumpf ,  Eckhard Ströfer ,  Ortmund Lang ,  Neven Lang

IPC分类号： C07C45/78

CPC分类号： C07C45/82 ,  C07C47/04

摘要： A process for preparing a high-concentration formaldehyde solution by removing water from a lower-concentration formaldehyde solution having a formaldehyde content of from 5 to 50% by weight, in which the lower-concentration formaldehyde solution is fed to a preheater and heated in the preheater, depressurized via a pressure maintenance device and concentrated in a helical tube evaporator to give a vapor stream and the high-concentration formaldehyde solution as bottom stream, wherein the heated lower-concentration formaldehyde hyde solution is depressurized in the pressure maintenance device to give a two-phase mixture which is fed into the helical tube evaporator, is proposed.

摘要翻译： 通过从甲醛含量为5〜50重量％的低浓度甲醛溶液中除去水而制备高浓度甲醛溶液的方法，其中将低浓度甲醛溶液加入到预热器中并在 预热器，通过压力维持装置减压，并浓缩在螺旋管蒸发器中，得到蒸气流，高浓度甲醛溶液作为底部流，其中加压的低浓度甲醛海藻溶液在压力维持装置中减压，得到 提出了进入螺旋管蒸发器的两相混合物。