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    • 6. 发明授权
    • Method for separating tioxane from a trioxane/formaldehyde/water mixture by means of pressure change rectification
    • 通过压力变换精馏从三恶烷/甲醛/水混合物中分离二恶烷的方法
    • US08350063B2
    • 2013-01-08
    • US12682294
    • 2008-09-22
    • Markus SiegertNeven LangLaszlo SzarvasChristoph SigwartFranz Niklaus WindlinEckhard Stroefer
    • Markus SiegertNeven LangLaszlo SzarvasChristoph SigwartFranz Niklaus WindlinEckhard Stroefer
    • C07D323/06C07D45/00B01D3/10
    • C07D323/06
    • A process for separating trioxane from a feed stream I comprising formaldehyde, trioxane and water, in which a) a feed stream I comprising formaldehyde as main component and trioxane and water as secondary components is provided, b) the feed stream I, a recycle stream V and a recycle stream VII comprising formaldehyde as main component and water and trioxane as secondary components are fed into a first distillation stage and distilled at a pressure of from 0.1 to 2.5 bar to give a stream II comprising formaldehyde as main component and water as secondary component and a stream III comprising trioxane as main component and water and formaldehyde as secondary components and a stream X comprising water, trioxane and formaldehyde, c) the stream III is, if appropriate after removal of low boilers from the stream III in a low boiler removal stage, distilled in a second distillation stage at a pressure of from 0.2 to 17.5 bar, with the pressure in the second distillation stage being from 0.1 to 15 bar higher than the pressure in the first distillation stage, to give a stream IV consisting essentially of trioxane and the recycle stream V comprising trioxane as main component and water and formaldehyde as secondary components, c1) the stream IV is purified in at least one further trioxane distillation stage at a pressure at the top of from 0.5 to 2 bar to give purified trioxane as side offtake stream XII in the enrichment section of the column, d) the stream X and, if appropriate, a stream IX comprising water as main component are fed into a third distillation stage and distilled at a pressure of from 1 to 10 bar to give a stream VI consisting essentially of water and a recycle stream VII comprising formaldehyde as main component and water and trioxane as secondary components, is described.
    • 提供了从包含甲醛,三恶烷和水的进料流I中分离三恶烷的方法,其中a)以甲醛为主要成分的进料流I和作为次要组分的三恶烷和水,b)进料流I,再循环流 V和包含甲醛作为主要成分的再循环料流VII和作为次要成分的水和三恶烷进料到第一蒸馏阶段并在0.1至2.5巴的压力下蒸馏,得到包含甲醛作为主要成分的流II和作为次要的水 组分和包含三恶烷作为主要组分的流III和作为次要组分的水和甲醛,以及包含水,三恶烷和甲醛的流X,如果在低锅炉中从流III中除去低锅炉之后,则流III 去除阶段,在第二蒸馏阶段在0.2至17.5巴的压力下蒸馏,第二蒸馏阶段的压力为0.1 得到基本上由三恶烷组成的物流IV和包含三恶烷作为主要成分的再循环流V,以及作为次要组分的水和甲醛,c1)流IV至少纯化 在0.5至2巴的顶部的压力下进一步进一步三恶烷蒸馏阶段,以在柱的富集部分中提供作为侧馏出物流XII的纯化的三恶烷,d)流X和如果合适的话,将包含水的流IX 主要组分进料到第三蒸馏阶段并在1至10巴的压力下蒸馏,得到基本上由水组成的料流VI和包含甲醛作为主要成分的再循环料流VII和作为次要成分的水和三恶烷。
    • 9. 发明申请
    • METHOD FOR SEPARATING TIOXANE FROM A TRIOXANE/FORMALDEHYDE/WATER MIXTURE BY MEANS OF PRESSURE CHANGE RECTIFICATION
    • 通过压力变化方法从三氧化E /甲醛/水混合物中分离三氧化二锑的方法
    • US20100270140A1
    • 2010-10-28
    • US12682294
    • 2008-09-22
    • Markus SiegertNeven LangLaszlo SzarvasChristoph SigwartFranz Niklaus WindlinEckhard Stroefer
    • Markus SiegertNeven LangLaszlo SzarvasChristoph SigwartFranz Niklaus WindlinEckhard Stroefer
    • B01D3/10B01D3/36
    • C07D323/06
    • A process for separating trioxane from a feed stream I comprising formaldehyde, trioxane and water, in which a) a feed stream I comprising formaldehyde as main component and trioxane and water as secondary components is provided, b) the feed stream I, a recycle stream V and a recycle stream VII comprising formaldehyde as main component and water and trioxane as secondary components are fed into a first distillation stage and distilled at a pressure of from 0.1 to 2.5 bar to give a stream II comprising formaldehyde as main component and water as secondary component and a stream III comprising trioxane as main component and water and formaldehyde as secondary components and a stream X comprising water, trioxane and formaldehyde, c) the stream III is, if appropriate after removal of low boilers from the stream III in a low boiler removal stage, distilled in a second distillation stage at a pressure of from 0.2 to 17.5 bar, with the pressure in the second distillation stage being from 0.1 to 15 bar higher than the pressure in the first distillation stage, to give a stream IV consisting essentially of trioxane and the recycle stream V comprising trioxane as main component and water and formaldehyde as secondary components, c1) the stream IV is purified in at least one further trioxane distillation stage at a pressure at the top of from 0.5 to 2 bar to give purified trioxane as side offtake stream XII in the enrichment section of the column, d) the stream X and, if appropriate, a stream IX comprising water as main component are fed into a third distillation stage and distilled at a pressure of from 1 to 10 bar to give a stream VI consisting essentially of water and a recycle stream VII comprising formaldehyde as main component and water and trioxane as secondary components, is described.
    • 提供了从包含甲醛,三恶烷和水的进料流I中分离三恶烷的方法,其中a)以甲醛为主要成分的进料流I和作为次要组分的三恶烷和水,b)进料流I,再循环流 V和包含甲醛作为主要成分的再循环料流VII和作为次要成分的水和三恶烷进料到第一蒸馏阶段并在0.1至2.5巴的压力下蒸馏,得到包含甲醛作为主要成分的流II和作为次要的水 组分和包含三恶烷作为主要组分的流III和作为次要组分的水和甲醛,以及包含水,三恶烷和甲醛的流X,如果在低锅炉中从流III中除去低锅炉之后,则流III 去除阶段,在第二蒸馏阶段在0.2至17.5巴的压力下蒸馏,第二蒸馏阶段的压力为0.1 得到基本上由三恶烷组成的物流IV和包含三恶烷作为主要成分的再循环流V,以及作为次要组分的水和甲醛,c1)流IV至少纯化 在0.5至2巴的顶部的压力下进一步进一步三恶烷蒸馏阶段,以在柱的富集部分中提供作为侧馏出物流XII的纯化的三恶烷,d)流X和如果合适的话,将包含水的流IX 主要组分进料到第三蒸馏阶段并在1至10巴的压力下蒸馏,得到基本上由水组成的料流VI和包含甲醛作为主要成分的再循环料流VII和作为次要成分的水和三恶烷。