The result shows that high valued 3,5-xylenol with a purity of over 95% can be extracted from industry level xylenol fraction by rectification.

• 以焦油中低附加值产品工业二甲酚后馏分为原料,用精馏的方法可以得到质量分数>95%25的3,5-二甲酚高附加值产品。