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    • 45. 发明申请
    • INTEGRATED METHOD FOR THE PREPARATION OF TRIOXANE FROM FORMALDEHYDE
    • 用于从甲醛制备三氧化二铁的综合方法
    • US20090187033A1
    • 2009-07-23
    • US12304223
    • 2007-06-11
    • Markus SiegertNeven LangEckhard StroeferChristophe Sigwart
    • Markus SiegertNeven LangEckhard StroeferChristophe Sigwart
    • C07D323/06
    • C07D323/06Y02P20/125
    • An integrated process for preparing trioxane from formaldehyde, comprising the steps of: a) feeding a feed stream A1 comprising formaldehyde and water and a recycle stream B3 comprising predominantly water and additionally formaldehyde and trioxane to a formaldehyde concentration unit and separating it into a formaldehyde-rich stream A2 and a stream A3 consisting essentially of water; b) feeding a product stream C1 comprising trioxane, water and formaldehyde, a recycle stream E1 comprising trioxane, water and formaldehyde, and, if appropriate, the stream A2 to a first low-pressure distillation column and distilling at a pressure of from 0.1 to 1.5 bar, and withdrawing a trioxane-enriched stream B comprising predominantly trioxane and additionally water and formaldehyde, a bottom draw stream B2 consisting essentially of formaldehyde and water, and the recycle stream B3 comprising predominantly water and additionally formaldehyde and trioxane as a side draw stream; c) feeding the bottom draw stream B2 and, if appropriate, the stream A2 to a trioxane synthesis reactor and allowing them to react to obtain the stream C1 comprising trioxane, water and formaldehyde; d) feeding the stream B1 to a medium-pressure distillation column and distilling at a pressure of from 1.0 to 3.0 bar to obtain a low boiler stream D1 comprising methanol, methylal and methyl formate, and a stream D2 comprising predominantly trioxane and additionally formaldehyde and water; e) feeding the stream D2 to a high-pressure distillation column and distilling at a pressure of from 2.5 to 10.0 bar to obtain the recycle stream E1 comprising trioxane, water and formaldehyde, and a product stream E2 consisting essentially of trioxane; the stream A2 being fed either to the low-pressure distillation column or to the trioxane synthesis reactor or to both.
    • 一种用于从甲醛制备三恶烷的综合方法,包括以下步骤:a)将包含甲醛和水的进料流A1和主要包含水,再加甲醛和三恶烷的再循环流B3进料至甲醛浓缩装置,并将其分离成甲醛 - 富流A2和基本上由水组成的流A3; b)将包含三恶烷,水和甲醛的产物流C1,包含三恶烷,水和甲醛的循环流E1,以及如果合适的话,将流A2加入到第一低压蒸馏塔中,并在0.1至0.1的压力下蒸馏 包括主要为三恶烷,另外为水和甲醛的三恶烷富集流B,主要由甲醛和水组成的底部牵引流B2,主要包含水和另外的甲醛和三恶烷作为侧馏分流的再循环流B3 ; c)将底部牵引流B2和(如果合适的话)将料流A2加入到三恶烷合成反应器中并使其反应以获得包含三恶烷,水和甲醛的料流C1; d)将料流B1加入到中压蒸馏塔中并在1.0-3.0巴的压力下蒸馏,得到包含甲醇,甲缩醛和甲酸甲酯的低沸点物流D1,以及主要包含三恶烷和另外甲醛的物流D2,以及 水; e)将料流D2加入到高压蒸馏塔中并在2.5至10.0巴的压力下蒸馏以获得包含三恶烷,水和甲醛的再循环流E1和基本上由三恶烷组成的产物流E2; 流A2被供给至低压蒸馏塔或三恶烷合成反应器或两者。
    • 46. 发明申请
    • Process for Producing Trioxane and at Least One Comonomer
    • 生产三恶烷和至少一种共聚单体的方法
    • US20080283384A1
    • 2008-11-20
    • US12091976
    • 2006-10-27
    • Neven LangRalf BoehlingAchim StammerJan OldenburgMarkus SiegertEckhard Stroefer
    • Neven LangRalf BoehlingAchim StammerJan OldenburgMarkus SiegertEckhard Stroefer
    • C08G2/10B01D3/34C07D317/12C07D323/06
    • C08G2/10C07D317/12C07D323/06C08G2/20Y02P20/127Y02P20/582
    • 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.
    • 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。
    • 50. 发明授权
    • Production of high-concentration formaldehyde solutions
    • 生产高浓度甲醛溶液
    • US07345207B2
    • 2008-03-18
    • US10547732
    • 2004-03-04
    • Eckhard StroeferNeven LangHans HasseThomas GrütznerMichael Ott
    • Eckhard StroeferNeven LangHans HasseThomas GrütznerMichael Ott
    • G07C45/78C08G8/04
    • C07C45/002C07C45/82C07C47/04
    • Process for preparing high-concentration formaldehyde solutions having a CH2O content of ≧50% by weight from an aqueous formaldehyde solution having a lower CH2O content by evaporation of part of this solution (partial evaporation), in which the aqueous formaldehyde solution is heated to an evaporation temperature T at which the gas phase becomes enriched in water relative to the liquid phase and the gas phase formed is taken off continuously or discontinuously, wherein the evaporation temperature T obeys the relationship: T[° C.]
    • 通过蒸发具有较低CH 2 O 2含量的甲醛水溶液制备CH 2 O 2含量> 50重量%的高浓度甲醛溶液的方法 该部分溶液(部分蒸发),其中甲醛水溶液被加热到气相相对于液相富集水的蒸发温度T,形成的气相连续或不连续地取出,其中 蒸发温度T遵循以下关系:<?in-line-formula description =“In-line Formulas”end =“lead”?> T [°C。] <°C] <?in-line-formula description =“In-line Formulas”end =“tail”?> <?in-line-formula description =“In-line Formulas”end =“lead”?>其中T < (c)= A + Bx(c / 100)+ Cx(c / 100)2 + Dx(c / 100)3 < line-formula description =“In-line Formulas”end =“tail”?> A = + 68.759,B = + 124.77,C = -12.851,D = -10.095,其中c是瞬时CH 2, / 在蒸发期间甲醛水溶液的重量百分比为20〜99重量%。