Preparation of polyhalo phenols
    1.
    发明授权
    Preparation of polyhalo phenols 失效
    多酚酚的制备

    公开(公告)号:US3702871A

    公开(公告)日:1972-11-14

    申请号:US3702871D

    申请日:1969-06-12

    IPC分类号: C07C37/02 C07C39/32

    CPC分类号: C07C37/02 C07C39/32

    摘要: A PROCESS IS PROVIDED FOR THE CONTROLLED HYDROLYSIS OF POLYHALOBENZENES AND, PARTICULARLY, TETRAHALOBENZENES TO POLYHALOPHENOLS IN GOOD YIELD AND PURITY. THIS IS ATTAINED BY CAUSING ALKALINE HYDROLYSIS OF A POLYHALOBENZENE CONTAINING AT LEAST THREE HALO ATOMS TO OCCUR UNDER CONTROLLED CONDITIONS WHICH INVOLVE THE PRESENCE OF AN HYDROLYSIS CONTROLLING REAGENT, A POLYHYDRIC ALCOHOL SOLVENT, HIGH CONCENTRATIONS OF RESULTANT PHENATE AT PREDETERMINED PH RANGES AND THE DIRECT RECOVERY OF SAID SOLVENT. ADVANTAGEOUSLY, THE PROCESS IS SUBSTANTIALLY FREE FROM EXPLOSION HAZARDS AND AVOIDS THE PREPARATION OF CHLORACENE-PRODUCING SUBSTANCES.