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    • 8. 发明申请
    • Method for separating trioxane from a mixture containing trioxane, formaldehyde and water
    • 从含有三恶烷,甲醛和水的混合物中分离三恶烷的方法
    • US20070155972A1
    • 2007-07-05
    • US10583696
    • 2004-12-21
    • Neven LangEckhard StroeferAchim StammerThorsten FrieseMarkus SiegertMichael OttHans HasseThomas GrutznerSergej Blagov
    • Neven LangEckhard StroeferAchim StammerThorsten FrieseMarkus SiegertMichael OttHans HasseThomas GrutznerSergej Blagov
    • C07D305/12C07C41/03
    • C07D323/06B01D3/146B01D3/36Y02P20/127
    • A process for removing trioxane from a mixture I of formaldehyde, trioxane and water, by a) distilling the mixture I in a first distillation stage at a pressure of from 0.1 to 2 bar to obtain a stream II which comprises formaldehyde and a stream III which comprises predominantly trioxane and additionally water and formaldehyde, b) mixing the stream III with a recycle stream VII which comprises predominantly trioxane and additionally water and formaldehyde to obtain a stream IIIa which comprises predominantly trioxane and additionally water and formaldehyde, c) distilling the stream IIIa, if appropriate after removing low boilers from the stream III or IIIa in a further distillation stage, in a second distillation stage at a pressure of from 0.2 to 10 bar, the pressure in the second distillation stage being at least 0.1 bar higher than the pressure in the first distillation stage, to obtain a stream IV of trioxane and a stream V which comprises predominantly trioxane and additionally water and formaldehyde, d) distilling the stream V in a third distillation stage at a pressure of from 0.1 to 4 bar to obtain a stream VI which comprises predominantly water and additionally formaldehyde, and the recycle stream VII which comprises predominantly trioxane and additionally water and formaldehyde, e) if appropriate, distilling the stream VI in a fourth distillation stage to obtain a stream VIII which comprises predominantly water, and a stream IX which comprises predominantly formaldehyde.
    • 一种从甲醛,三恶烷和水的混合物I中除去三恶烷的方法,通过以下步骤a)在0.1至2巴的压力下在第一蒸馏阶段中蒸馏混合物I以获得包含甲醛和流III的流II 主要包含三恶烷,另外还含有水和甲醛,b)将流III与主要包含三恶烷,另外含有水和甲醛的再循环流VII混合,得到主要含有三恶烷,另外含有水和甲醛的流IIIa,c)蒸馏流IIIa 如果适当,则在进一步蒸馏阶段从流III或IIIa除去低锅炉后,在0.2至10巴的压力的第二蒸馏阶段中,第二蒸馏阶段中的压力比压力高至少0.1巴 在第一蒸馏阶段,获得三恶烷的流IV和主要包含三恶烷并另外包含的流V 和d)在0.1至4巴的压力下在第三蒸馏阶段中蒸馏物流V以获得主要包含水和另外甲醛的物流VI,以及主要包含三恶烷和另外的水的再循环流VII,以及 甲醛,e)如果合适,在第四蒸馏阶段中蒸馏物流VI以获得主要包含水的物流VIII和主要包含甲醛的物流IX。