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LI Yanfang,CAO Zubin,LI Dandong,HAN Dongyun,SHI Junfeng
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李艳芳,曹祖宾,李丹东,韩冬云,石俊峰
Abstract:
Isolation of β-methylnaphthalene from the 230~250℃ fractions of ethylene tar was studied by using an extraction-rectification method. The quinoline compounds and indole in the ethylene tar were firstly extracted with 80% sulfuric acid,through which the extracted residue contains only trace amount of quinoline,and the amount of indole is reduced from 2.06% to 0.08%. The extracted ethylene tar was then rectified yielding β-methylnaphthalene with 96.73% purity and an yield close to 60%. Compared with the distillation,crystallization and recrystallization process,the current method provides β-methylnaphthalene with lower impurity content and higher purity.
摘要:
介绍了一种从乙烯焦油中提取β-甲基萘的方法,研究了以乙烯焦油230~250 ℃馏分为原料,利用萃取-精馏相结合的方法提取β-甲基萘。结果表明,采用浓度为80%的硫酸作溶剂萃取原料中的喹啉类物质和吲哚,萃取后喹啉类为痕量,吲哚从2.06%减小到0.08%。萃取后的馏分进行精馏得到纯度96.73%的β-甲基萘,产品收率接近60%。该法与精馏、结晶、重结晶的工艺相比得到的β-甲基萘杂质含量低、纯度高。
LI Yanfang,CAO Zubin,LI Dandong,HAN Dongyun,SHI Junfeng. Isolation of ?-methylnaphthalene from ethylene tar through extraction-rectification[J]. .
李艳芳,曹祖宾,李丹东,韩冬云,石俊峰. 萃取-精馏法从乙烯焦油中提取β-甲基萘 [J]. CIESC Journal.
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https://hgxb.cip.com.cn/EN/Y2010/V29/I11/2049