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    • 5. 发明授权
    • Process for the preparation of alpha-oxoaldehydes
    • 制备α-氧代醛的方法
    • US06313343B1
    • 2001-11-06
    • US09462527
    • 2000-01-07
    • Yoshitaka AritaAkihiko OhtaNoboru SaitoKimio Ariyoshi
    • Yoshitaka AritaAkihiko OhtaNoboru SaitoKimio Ariyoshi
    • C07C6966
    • C07C45/37C07C45/38C07C45/39C07C67/39C07C49/185C07C47/127C07C69/716
    • Alkylene glycol is oxidized in a vapor phase in the presence of alcohol (a), oxygen, and a catalyst (a) (primary reaction). &agr;-oxoaldehyde, and alcohol (b) or olefin, are oxidized in a vapor phase in the presence of oxygen and a catalyst (b) (secondary reaction). A molar ratio of the alkylene glycol to the alcohol (a) is preferably in a range of 1/100 to 5/1. It is preferable that one same compound is used as the alcohol (a) and the alcohol (b). In the case where the primary and secondary reactions are successively executed, a reaction device in which a primary reactor and a secondary reactor are connected in a two-stage connection type is preferably used. This ensures that a method is provided that is capable of producing &agr;-oxoaldehyde at a higher yield than conventionally, and further, that is capable of stably obtaining an &agr;-oxoaldehyde solution or gas with a higher concentration than conventionally.
    • 在醇(a),氧气和催化剂(a)(初级反应)的存在下,在气相中氧化亚烷基二醇。 α-氧代醛和醇(b)或烯烃在氧气和催化剂(b)的存在下在气相中被氧化(二次反应)。 亚烷基二醇与醇(a)的摩尔比优选在1/100〜5/1的范围内。 优选使用一种相同的化合物作为醇(a)和醇(b)。 在连续进行一次反应和二次反应的情况下,优选使用其中一级反应器和二级反应器以两级连接型连接的反应装置。 这确保了提供能够以比常规方法更高的产率生产α-氧代醛的方法,并且还能够稳定地获得比常规浓度高的α-氧代醛溶液或气体。