混合C_9芳烃与异丁烯合成西藏麝香的工艺研究

Study on Synthesis of Musk Tibetene From Mixed C_9 Aromatic Hydrocarbon and Isobutene

以催化重整C9芳烃分离装置分离出均三甲苯、偏三甲苯后的副产品重组分溶剂(169～178℃馏分)——混合C9芳烃为原料,其中含连三甲苯40％-50％,以三氯化铝为催化剂与异丁烯进行烷基化反应,合成出5-叔丁基-1,2,3-三甲基苯中间体,经蒸馏后,用混酸进行硝化反应得到西藏麝香。本方法不但具有工艺路线简单、生产成本低的特点,同时也解决了富集连三甲苯的利用问题。

In this process , the heavy fraction solvent (169-178℃)--mixed C9 aromatic hydrocarbon, namely, the by - product of Mesitylene and Pseudocumene which are separated from C9 aromatic hydrocarbon catalytic reforming separation facility , will be the feedstock. And then it is alkylated by isobutene in presence of aluminium trichloride as catalyst to synthesize 5 - tert - butyl - 1, 2, 3 - trimethyl benzene intermediate product which , after distillation , is nitrated with ni-tro - sulfuric acid to obtain musk tibetene. This method is of low cost and simple in design , and the pregnant hemimellitene is fully used in this process.