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    VERFAHREN ZUR HERSTELLUNG VON ISOCYANATEN
    51.
    发明公开
    VERFAHREN ZUR HERSTELLUNG VON ISOCYANATEN 有权

    公开(公告)号：EP1976825A1

    公开(公告)日：2008-10-08

    申请号：EP07703734.9

    申请日：2007-01-09

    Applicant: BASF SE

    Inventor： KLÖTZER, Matthias ,  STROEFER, Eckhard ,  BLANKERTZ, Heinrich-Josef

    IPC: C07C263/06 ,  C07C265/14

    CPC classification number: C07C263/06 ,  C07C2601/14 ,  C07C265/14

    Abstract: The invention relates to a multi-stage method for continuously producing organic, distillable polyisocyanates, preferably diisocyanates, especially preferred aliphatic or cycloaliphatic diisocyanates, by reacting the corresponding organic polyamines with urea to give low-molecular monomeric polyureas. The invention also relates to the thermal decomposition of said substances.

    Abstract translation: 本发明涉及用于连续生产有机可蒸馏的多异氰酸酯，优选二异氰酸酯，特别优选的脂族或脂环族二异氰酸酯的多步方法，通过使相应的有机多胺与脲反应生成低分子量的单体聚脲。 本发明还涉及所述物质的热分解。

    VERFAHREN ZUR HERSTELLUNG VON POLYOXYMETHYLENDIMETHYLETHERN AUS METHANOL UND FORMALDEHYD
    52.
    发明公开
    VERFAHREN ZUR HERSTELLUNG VON POLYOXYMETHYLENDIMETHYLETHERN AUS METHANOL UND FORMALDEHYD 有权
    VERFAHREN ZUR HERSTELLUNG VON POLYOXYMETHYLENDIMETHYLETHERN AUS甲醇UND FORMALDEHYD

    公开(公告)号：EP1893667A1

    公开(公告)日：2008-03-05

    申请号：EP06841251.9

    申请日：2006-06-12

    Applicant: BASF SE

    Inventor： STROEFER, Eckhard ,  HASSE, Hans ,  BLAGOV, Sergej

    IPC: C08G65/00

    CPC classification number: C08G16/0212 ,  C07C41/56 ,  C07C43/30

    Abstract: 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).

    Abstract translation: 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）。

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