W. Min
2008
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Journal
Shandong Chemical Industry
Abstract
Used 1,4-butanediol and the hydrobromic acid synthesized with solid superacid catalyst SO~(2-)4/MXOY to catalysis 1,4-dibromobutane.Meanwhile the impact of the different condition including different temperature,different proportion and rate of feed on the catalysis reaction was studied and discussed.The products were purified and characterized by GC,IR and MS.It is shown that the optimal temperature for the catalytic synthesis is about 185℃,mole ration 1,4-butanediol and hydrobrodicacid is 13(mol/mol),amount of catalyst 5%,reaction time 4h,the yields of piperazine is up to 80%~90%.