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    • 7. 发明公开
    • VERFAHREN ZUR HERSTELLUNG VON ISOCYANATEN
    • EP1483235A1
    • 2004-12-08
    • EP03709737.5
    • 2003-02-28
    • BASF AKTIENGESELLSCHAFT
    • STRÖFER, EckhardOCHSE, MichaelKRASE, VolkerSCHMIDT, AndreasKLÖTZER, MatthiasMURRAR, ImbridtFRANZKE, Gisbert
    • C07C263/04
    • C07C263/04C07C265/14
    • The invention relates to a method for producing isocyanates made from carbamic acid esters, wherein (i) a mixture containing a single or multiple functional carbamic acid ester is continually introduced into a fission reactor or a cascade made from two or more fission reactors, (ii) the carbamic acid esters undergo thermal fission to form isocyanates and alcohol, (iii) the fission gas escaping from the fission reactor(s), containing the isocyanate, alcohol, optionally non-fissioned and/or partially fissioned carbamic acid esters and sub-constituents, is at least partially brought into contact with a liquid coolant and condensing agent and is coded and at least partially condensed, (iv) the isocyanate and the alcohol are obtained from the cooled fission gas and the condensate in a rectifying column, wherein a partial stream of the obtained alcohol is used as a liquid cooling and condensing agent for the cooling and the condensation of the fission gas.
    • 本发明涉及由氨基甲酸酯制备的异氰酸酯的制备方法,其中(i)将含有单个或多个官能氨基甲酸酯的混合物连续引入由两个或更多个裂变反应器制成的裂变反应器或级联中,(ii) )氨基甲酸酯经历热裂变以形成异氰酸酯和醇,(iii)从裂变反应器逸出的含有异氰酸酯,醇,任选未分裂的和/或部分分裂的氨基甲酸酯和亚烷基二醇的裂变气体, 至少部分地与液体冷却剂和冷凝剂接触并且被编码并且至少部分地冷凝,(iv)异氰酸酯和醇从冷却的裂变气体和精馏塔中的冷凝物获得,其中a 使用所得醇的部分流作为用于冷却和凝聚裂变气体的液体冷却和冷凝剂。