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    • 2. 发明授权
    • Method of producing 3-bromobenzaldehyde
    • 生产3-溴苯甲醛的方法
    • US4945186A
    • 1990-07-31
    • US455782
    • 1990-01-02
    • Shinichi MatsuuraOsamu Miyano
    • Shinichi MatsuuraOsamu Miyano
    • B01J27/125C07C45/00C07C45/63C07C47/55C07C67/00
    • C07C45/63
    • A method of producing 3-bromobenzaldehyde is disclosed, wherein, upon producing 3-bromobenzaldehyde by allowing benzaldehyde to react with bromine in the presence of brominating catalyst in 1,2-dichloroethane being a reaction solvent, 1,2-dichloroethane having been used for aforesaid reaction as a reaction solvent is recovered and, after the recovered solvent is allowed first to react with chlorine in the presence of above brominating catalyst, the reaction is performed by the addition of benzaldehyde and bromine. Foregoing 1,2-dichloroethane recovered may be brought to the reaction with chlorine with or without adding fresh 1,2-dichloroethane and above brominating catalyst is preferably aluminum chloride.
    • 公开了一种生产3-溴苯甲醛的方法,其中在溴代催化剂存在下,在1,2-二氯乙烷为反应溶剂中,通过使苯甲醛与溴反应生成3-溴苯甲醛时,将1,2-二氯乙烷用于 回收作为反应溶剂的上述反应,在回收的溶剂首先在上述溴化催化剂存在下与氯反应后,通过加入苯甲醛和溴进行反应。 回收的前述1,2-二氯乙烷可与带有或不加入新鲜的1,2-二氯乙烷的氯反应,并且上述溴化催化剂优选为氯化铝。