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    • 67. 发明公开
    • VERFAHREN ZUR HERSTELLUNG VON POLYOXYMETHYLENDIMETHYLETHERN AUS METHANOL UND FORMALDEHYD
    • VERFAHREN ZUR HERSTELLUNG VON POLYOXYMETHYLENDIMETHYLETHERN AUS甲醇UND FORMALDEHYD
    • EP1893667A1
    • 2008-03-05
    • EP06841251.9
    • 2006-06-12
    • BASF SE
    • STROEFER, EckhardHASSE, HansBLAGOV, Sergej
    • C08G65/00
    • C08G16/0212C07C41/56C07C43/30
    • A process for preparing tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4) by reacting formaldehyde with methanol and subsequently working up the reaction mixture by distillation, comprising the steps of: a) feeding aqueous formaldehyde solution and methanol into a reactor and reacting to give a mixture a comprising formaldehyde, water, methylene glycol (MG), polyoxymethylene glycols (MGn>1), methanol, hemiformals (HF), methylal (POMDMEn=1) and polyoxymethylene glycol dimethyl ethers (POMDMEn>1); b) feeding the reaction mixture a into a first distillation column and separating into a low boiler fraction b1 and a high boiler fraction b2 comprising formaldehyde, water, methanol, polyoxymethylene glycols, hemiformals and polyoxymethylene glycol dimethyl ethers (POMDMEn>1); c) feeding the high boiler fraction b2 into a second distillation column and separating into a low boiler fraction c1 comprising formaldehyde, water, methylene glycol, polyoxymethylene glycols, methanol, hemiformals, di-, tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=2,3,4) and a high boiler fraction c2; d) feeding the low boiler fraction c1 into a third distillation column and separating into a low boiler fraction d1 and a high boiler fraction d2 substantially consisting of formaldehyde, water, methylene glycol, polyoxymethylene glycols, tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4); e) feeding the high boiler fraction d2 into a phase separation apparatus and separating into an aqueous phase e1 substantially consisting of formaldehyde, water, methylene glycol and polyoxymethylene glycols, and an organic phase e2 comprising tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4); f) feeding the organic phase e2 into a fourth distillation column and separating into a low boiler fraction f1 substantially consisting of formaldehyde, water, methylene glycol and polyoxymethylene glycols, and a high boiler fraction f2 substantially consisting of tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4).
    • 一种通过使甲醛与甲醇反应并随后通过蒸馏处理反应混合物来制备三甲醛和四甲二醇二甲醚(POMDMEn = 3,4)的方法,包括以下步骤:a)将甲醛水溶液和甲醇加入到反应器中, (MG),聚甲醛二醇(MGn> 1),甲醇,半缩甲醛(HF),甲缩醛(POMDMEn = 1)和聚甲醛二醇二甲醚(POMDMEn> 1)的混合物; b)将反应混合物a加入第一蒸馏塔并分离成低沸点馏分b1和包含甲醛,水,甲醇,聚甲醛二醇,半缩甲醛和聚甲醛二醇二甲醚(POMDMEn> 1)的高沸点馏分b2; c)将高沸点馏分b2进料到第二蒸馏塔并分离成包含甲醛,水,亚甲基二醇,聚甲醛二醇,甲醇,半缩甲醛,二 - ,三 - 和四甲二醇二甲醚(POMDMEn = 2 ,3,4)和高沸点馏分c2; d)将低沸点馏分c1加入第三蒸馏塔并分离成低沸物馏分d1和基本上由甲醛,水,亚甲基二醇,聚甲醛二醇,三甲醛和四甲二醇二甲醚(POMDMEn = 3,4); e)将高沸点馏分d2加入到相分离装置中并分离成基本上由甲醛,水,亚甲基二醇和聚甲醛二醇组成的水相e1,以及包含三和四甲撑二醇二甲醚的有机相e2(POMDMEn = 3 ,4); f)将有机相e2加入第四蒸馏塔并分离成基本上由甲醛,水,亚甲基二醇和聚甲醛二醇组成的低沸点馏分f1和基本上由三聚甲醛和四聚甲二醇二甲醚组成的高沸点馏分f2( POMDMEn = 3,4)。
    • 68. 发明公开
    • VERFAHREN ZUR HERSTELLUNG VON POLYOXYMETHYLENDIMETHYLETHERN AUS METHANOL UND FORMALDEHYD
    • 用于生产聚甲醛二甲醚甲醇和甲醛
    • EP1893660A1
    • 2008-03-05
    • EP06777305.1
    • 2006-06-12
    • BASF SE
    • STRÖFER, EckhardHASSE, HansBLAGOV, Sergej
    • C08G2/08C07C41/56
    • C07C41/48C07C41/56C07C41/58C08G2/08C07C43/30
    • The invention relates to a method for producing tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4) by reacting formaldehyde with methanol followed by a distillative processing of the reaction mixture with the following steps: a) feeding an aqueous formaldehyde solution and methanol into a reactor and reacting; b) feeding reaction mixture a into a reactive evaporator and separating it into a low-boiling fraction b1 containing formaldehyde, water, methanol, methylene glycol, polyoxymethylene glycols, hemiformals, methylal and polyoxymethylene glycol dimethyl ether (POMDMEn>i) and a high-boiling fraction b2 and returning the high-boiling fraction b2 into the reactor (step a)); c) feeding the low-boiling fraction b1 into a first distillation column and separating it into a low-boiling fraction c1 containing formaldehyde, water, methylene glycol, methanol, hemiformals, methylal, di-, tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=2,3,4) and into a high-boiling fraction c2 and returning the high-boiling fraction c2 into the reactive evaporator (step b)); d) feeding the low-boiling fraction c1 into a second distillation column and separating it into a low-boiling fraction d1 and into a high-boiling fraction d2 consisting of formaldehyde, water, methylene glycol, polyoxymethylene glycols, tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4); e) feeding the high-boiling fraction d2 into a phase separating apparatus and separating it into an aqueous phase e1 consisting of formaldehyde, water, methylene glycol and polyoxymethylene glycols and into an organic phase e2 containing tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4); f) feeding the organic phase e2 into a third distillation column and separating it into a low-boiling fraction f1 consisting of formaldehyde, water, methylene glycol and polyoxymethylene glycols and into a high-boiling fraction f2 consisting of tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4).