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1.发明授权Process for the preparation of 2,2-bis-(4-hydroxy-3,5-dichlorophenyl)-propane and 2,2-bis-(4-hydroxy-3-chlorophenyl)-propane 失效制备2,2-双（4-羟基-3,5-二氯苯基）丙酸和2,2-双（4-羟基-3-氯苯基）丙酸的方法
公开(公告)号：US3850994A
公开(公告)日：1974-11-26
申请号：US26182772
申请日：1972-06-12
Applicant: DYNAMIT NOBEL AG
Inventor： ZOCHE G , RICHTZENHAIN H , ISMAIL R
IPC: C07C37/62 , C07C39/367 , C08G63/682 , C07C37/22 , C07C37/44
CPC classification number: C07C37/62 , C07C37/84 , C08G63/6826 , C07C39/367
Abstract: 1. A PROCESS FOR THE PURIFICATION OF 2,2-BIS-(4-HYDROXY3,5-DICHLOROPHENYL)-PROPANE OBTAINED BY CHLORINATING 2,2BIS(4-HYDROXYPHENYL)-PROPANE WHICH COMPRISES FORMING A SOLUTION OF SAID 2,2-BIS-(4-HYDROXY-3,5-DICHLOROPHENYL)PROPANE BY ADMIXING THE SAME WITH AT LEAST ONE ALIPHATIC HALOGENATED HYDROCARBON SOLVENT THEREOF SELECTED FROM THE GROUP CONSISTING OF METHYLENE CHLORIDE, METHYLIODIDE ETHYLBROMIDE, TRANS-1,2-DICHLOROETHYLENE, 1,2-DICHLOROETHANE, 1,2-DIBROMOETHANE, AND 1,4-DICHLOROBUTANE, ADDING WATER THERETO WHEREBY CAUSING A CHLORINATED PRODUCT TO PRECIPITATE AND CRYSTALLIZE THEREFROM; SEPARATING SAID CHLORINATED PRODUCT FROM SAID WATER AND SAID ALIPHATIC HALOGENATED HYDROCARBON SOLVENT AND RECOVERING 2,2-BIS(4-HYDROXY-3,5-DICHLOROPHENYL)PROPANE FROM SAID CHLORINATED PRODUCT.
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