Han Xiao-lan
2007
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Journal
Fine and Specialty Chemicals
Abstract
2,2',4-Trihydroxybenzophenone was prepared by the FriedelCrafts reaction using 1,3-benzenediol and salicylic acid as raw materials,chlorobenzene as solvent in presence of anhydrous zinc chloride as catalyst.The factors such as reaction temperature,reaction time and ratio of raw materials influencing on the yield were investigated.The optimum conditions were as follow: molar ratio of 1,3-benzenediol to salicylic acid was 1∶1.2,reaction temperature was 120℃,reaction time was 3h.Under the above mentioned conditions,the yield could be reached 90%.The final product was characterized by IR and UV spectrum,and it was showed that the product was a compound of benzophenone type,hence it could be used as an UV absorbent.