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首页> 外文期刊>Chemical Engineering & Technology: Industrial Chemistry -Plant Equipment -Process Engineering -Biotechnology >Synthesis of High-Purity Methylal via Extractive Catalytic Distillation
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Synthesis of High-Purity Methylal via Extractive Catalytic Distillation

机译：萃取催化蒸馏法合成高纯度甲缩醛

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摘要

An integrated continuous process, which combines catalytic distillation and extractive distillation in one column, is investigated for the synthesis of high-purity methylal from methanol and formalin in the presence of a cation-exchange resin catalyst. A feed with methanol:formaldehyde 2:1 molar ratio is chosen to evaluate the effects of operating parameters, such as extractant feeding position, ratio of extractant to feed, reflux ratio, and reboiler temperature, on the continuous synthesis of methylal. Under the optimum operating conditions and with water as extractant, the extractive catalytic distillation process operated continuously, producing a methylal purity of 98.7% (H2O: < 1.30%) with 98.0% formaldehyde conversion.
机译：为了在阳离子交换树脂催化剂的存在下，由甲醇和福尔马林合成高纯度的甲缩醛，研究了一种将催化蒸馏和萃取蒸馏结合在一起的一体化连续工艺。选择甲醇：甲醛为2∶1摩尔比的进料，以评价操作参数，例如萃取剂的进料位置，萃取剂与进料的比率，回流比和再沸器温度对连续合成甲缩醛的影响。在最佳操作条件下，以水为萃取剂，萃取催化蒸馏过程连续进行，可制得98.7％（H2O：<1.30％）的甲缩醛，甲醛转化率为98.0％。

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