摘要
选用焦化厂自产中间馏分作为溶剂、先用第一溶剂从粗蒽中提取蒽和咔唑中间产品,确定分离的最佳方案。再用第二溶剂分离蒽和咔唑,找出制取精蒽(纯度高于94％)的条件。结合蒸馏、重结晶方法提取精制咔唑产品(纯度高于91％)。本方法使用溶剂可循环,具有产品质量好、回收率高、生产成本低等特点。
We first determined the best method for extracting the middle product of anthrancene and carbazole from crude anthrancene by selecting a middle fraction made in a coking plant as the frist solvent, After that, the second solvent was found for separating anthranene from the middle product and the conditions were determined for refining the anthrancene (purity over 94％ wt). Sintaneously the refined carbazole products with high purity (over 91％) were obtained by means of distillation and recrystal, The method this paper describes is in practive.
关键词
蒽
咔唑
结晶
蒸馏
煤焦油
anthrancene
carbazole
crystal
distillaticn.
