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    PROCESS FOR PRODUCING CARBONIC ESTER
    12.
    发明公开
    PROCESS FOR PRODUCING CARBONIC ESTER 有权
    工艺生产二氧化碳酯

    公开(公告)号：EP1535896A4

    公开(公告)日：2006-08-02

    申请号：EP03784544

    申请日：2003-08-06

    申请人： ASAHI KASEI CHEMICALS CORP

    发明人： MIYAKE NOBUHISA ,  WATANABE TOMONARI

    IPC分类号： C07C68/04 ,  C07C68/08 ,  C07C69/96

    CPC分类号： C07C68/04 ,  C07C69/96

    摘要： A process for carbonic ester production, characterized by: (1) reacting carbon dioxide with an organometallic-compound mixture comprising a reactive organometallic compound having at least two metal-oxygen-carbon bonds per molecule and a non-reactive compound which is derived from the reactive organometallic compound and is unable to be regenerated to thereby obtain a reaction mixture comprising a carbonic ester formed by the reaction, the non-reactive compound unable to be regenerated, and a modified organometallic compound derived from the reactive organometallic compound and capable of being regenerated; (2) separating the reaction mixture into a first part comprising the carbonic ester and the non-reactive compound unable to be regenerated and a second part comprising the modified organometallic compound capable of being regenerated; and (3) reacting the second part of the reaction mixture with an alcohol to form water and an organometallic-compound mixture comprising a reactive organometallic compound having at least two metal-oxygen-carbon bonds per molecule and a non-reactive compound which is derived from the reactive organometallic compound and is unable to be regenerated, and removing the water from the organometallic-compound mixture.

    METHOD FOR PRODUCING ISOCYANATE
    19.
    发明公开
    METHOD FOR PRODUCING ISOCYANATE 审中-公开
    异氰酸酯的制备方法

    公开(公告)号：EP2980066A4

    公开(公告)日：2016-11-23

    申请号：EP14774772

    申请日：2014-03-28

    申请人： ASAHI KASEI CHEMICALS CORP

    发明人： SHINOHATA MASAAKI ,  TAKEUCHI KOUJI ,  FUJIMOTO NAOKI ,  MIYAKE NOBUHISA

    IPC分类号： C07C263/04 ,  C07C263/20 ,  C07C265/14 ,  C07C269/04 ,  C07C271/06

    CPC分类号： C07C263/04 ,  C07C269/04 ,  C07C265/14 ,  C07C271/06

    摘要： A method for producing an isocyanate, comprising: a carbamation step of generating an N-substituted carbamate from an organic primary amine, urea and an organic hydroxy compound according to a carbamation reaction, and then recovering a first gaseous phase component containing the urea and/or a compound having a carbonyl group derived from the urea, the organic hydroxy compound, and ammonia; a condensation step of condensing the first gaseous phase component with a condenser; an isocyanate production step of producing an isocyanate by subjecting the N-substituted carbamate to pyrolysis; an ammonia absorption step of allowing a second gaseous phase component containing ammonia recovered as a gaseous phase component from the condenser as a main component, to be absorbed by absorption water, and generating gas-absorbed water; and an ammonia stripping step of heating the gas-absorbed water to separate ammonia from the gas-absorbed water.