Citation:
FEI Xue-Ning, YANG Shao-Bin, LIU Li-Juan, SHI Bo-Jie, ZHANG Bao-Lian. Study on Ullmann Condensation Reaction of Bromamine Acid[J]. Chinese Journal of Applied Chemistry,
;2007, 24(10): 1136-1139.
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The catalytic system of sulfuric acid-water-copper used in Ullmann condensation reaction of bromamine acid was replaced with a strong acid ion exchange resin-ethanol-copper system. The effect of the ion exchange resin loading, the kind of solvent, and the reaction temperature on the yield of the condensation product was investigated. The results show that the yield of the condensation product could reach 94.0% in ethanol-water(9:1) at 70℃ after 3 h. The strong acid ion exchange resin, copper powder and ethanol could be reused under the reaction conditions. The activity of the resin was not obviously reduced after reusing 5 times, and 70%~80% ethanol and 85%~90% copper powder in the reaction can be recovered.
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