摘要
研究了 4,4′-双 (氯甲基 )联苯 ( BCMB)的合成方法及工艺条件。以多聚甲醛、联苯、氯化氢气体为原料 ,氯化锌为催化剂 ,经氯甲基化反应合成 BCMB,最佳工艺条件 :多聚甲醛∶联苯∶氯化锌 =2 .1～ 2 .3∶ 1∶ 1.68(摩尔比 ) ,氯化锌∶水 =2 .8(质量比 ) ,反应温度 5 6～ 60°C,反应时间 5 h。产品熔点 12 7-13 3°C,收率 (以联苯计 )达 48%。
Synthetic method and technical conditions for BCMB were studied. The title compound was prepared by chloromethylation of biphenyl with paraformaldehyde and gaseous HCl with ZnCl 2 as catalyst. The synthetic conditions were paraformaldehyde∶ biphenyl= 2.1 ~2.3(molar ratio); ZnCl 2∶biphenyl=1.68(molar ratio); ZnCl 2∶H 2O=2.8(weight ratio), temperature of reaction: 58~60°C, time of reaction: 5 hours, yield of BCMB was 48% based on biphenyl.
出处
《化学世界》
CAS
CSCD
2000年第5期259-261,275,共4页
Chemical World
关键词
多聚甲醛
联苯
双(氯甲基)
合成
paraformaldehyde
biphenyl
chloromethylation
4,4′ bis(chloromethyl) biphenyl
