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    • 10. 发明授权
    • Process for coproducing di- and/or polyisocyanates and glycols
    • 共聚产生二 - 和/或多异氰酸酯和二醇的方法
    • US09000213B2
    • 2015-04-07
    • US13502763
    • 2010-10-27
    • Michael BockRobert BaumannAxel FranzkeEckhard StroeferGerhard Theis
    • Michael BockRobert BaumannAxel FranzkeEckhard StroeferGerhard Theis
    • C07C263/04C07C29/12C07C29/128C07C68/06
    • C07C263/04C07C29/12C07C29/128C07C68/065C07C2601/14C07C69/96C07C265/12C07C265/14C07C31/202
    • A process for coproducing di- and/or polyisocyanates and glycols, comprising process stages A, B, C and E for preparing glycols and process stages A, C, D, E, F and G for preparing di- and/or polyisocyanates,which comprises accomplishing the material coupling via the separation of the reaction mixture obtained in process stage A into process stages B and C, by in process stage A, reacting an aqueous alkylene oxide with carbon dioxide to give a reaction mixture comprising alkylene carbonate, hydrolyzing a portion of the alkylene carbonate-comprising reaction mixture obtained in process stage A to glycol in process stage B, dewatering the remaining alkylene carbonate-comprising stream of the reaction mixture from process stage A in process stage C, in process stage D, synthesizing amine by hydrogenating an aromatic nitro compound or a nitrile, in process stage E, transesterifying the dewatered alkylene carbonate-comprising mixture from process stage C with a monohydroxy alcohol to give the corresponding dialkyl carbonate, obtaining glycol as a coproduct, in process stage F, reacting the dialkyl carbonate-comprising reaction mixture obtained in process stage E with the amine obtained in process stage D to a mixture comprising the corresponding mono-, di- and/or polycarbamate, which in process stage G is cleaved to obtain the corresponding di- and/or polyisocyanate.
    • 用于共混生产二 - 和/或多异氰酸酯和二醇的方法,包括制备二元醇和工艺阶段A,C,D,E,F和G的制备二 - 和/或多异氰酸酯的工艺阶段A,B,C和E, 包括通过在工艺阶段A中将经处理阶段A获得的反应混合物分离成工艺阶段B和C来实现材料偶联,使环氧烷水溶液与二氧化碳反应,得到包含碳酸亚烷基酯的反应混合物,水解部分 在工艺阶段B中获得的含碳酸亚烷基酯的反应混合物在工艺阶段B中与二醇的混合物,在工艺阶段D中将来自反应混合物的剩余的含有碳酸亚烃的物流从工艺阶段C脱水,通过氢化合成胺 芳香族硝基化合物或腈,在工艺阶段E中,将来自工艺阶段C的脱水的含碳酸亚烷基酯混合物与单羟基醇酯交换,得到 相应的碳酸二烷基酯,在工艺阶段F中获得二醇作为副产物,将在工艺阶段E中获得的含碳酸二烷基酯的反应混合物与在工艺阶段D中获得的胺反应到包含相应的单 - ,二 - 和/ 或聚氨酯,其在工艺阶段G被切割以获得相应的二 - 和/或多异氰酸酯。