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本文以ｍ－甲酚为代表性酚类，Ｂａ（２＋）离子为沉淀剂首次采用沉淀法对酚类的回收过程进行了系统研究。获得了混合一元酚类回收过程的数学方程。结果表明，酚类沉淀率（ＰｅｒｃｅｎｔａｇｅｏｆＰｒｅｃｉｐｉｔａｔｉｏｎｏｆＰｈｅｎｏｌｓ）是沉淀平衡后的ｐＨ值、Ｂａ（２＋）离子浓度以及酚类原始浓度的函数。该方程与实验结果验证得极好，为进一步研究和认识离子沉淀法回收酚类过程以及指导工程设计提供计算方法和理论依据。该法对ＭＲＦ（ＭｕｌｔｉｓｔａｇｅＲｏｔａｒｙＦｕｒｎａｃｅ）低温热解焦油１７０～２１０℃馏分中酚类回收率可高达９０％，对焦化含酚废水的脱酚率＞９５％。
In this paper, m-cresol as a representative phenolic, Ba (2+) as a precipitating agent for the first time by precipitation method for the recovery of phenols were systematically studied. The mathematical equation for the recovery of mixed monohydric phenols was obtained. The results show that the precipitation rate (Percentage of Precipitation of Phenols) is a function of the pH after precipitation equilibrium, the concentration of Ba (2+) ions and the initial concentration of phenols. The equation and the experimental results proved to be very good, which provided the calculation method and theoretical basis for the further study and understanding of the phenolic recovery process and the engineering design. The method of MRF (Multistage Rotary Furnace) low-temperature pyrolysis of tar 170 ~ 210 ℃ fraction of phenol recovery rate of up to 90%, coking wastewater phenol de-phenol rate of> 95%.