【摘要】 工业生产中,热塑性酚醛树脂的合成过程会产生大量废水,废水中含有部分游离态的苯酚、甲醛,为了合理回收利用废水,需要对游离酚含量进行测定。本文比较并分析了目前现有的两种不同的测定游离酚的方法,得出用溴量法更适合于测定废水中的游离酚,该方法准确度及精确度较高,适合测定热塑性酚醛树脂废水中的游离酚含量。将合成过程产生的废水分步脱出,用溴量法测定其酚含量,然后将分步脱出的废水采取不同方法再回收使用。更多还原

【Abstract】 In industrial production,the synthesizing process of thermoplastic phenol-formaldehyde resin will produce large quantities ofwaste water,which contains part of free phenol and formaldehyde.In order to recycle the waste water reasonably,it is necessary to determine the content of free phenol.This paper compares and analyzes the two methods of determining free phenol content nowadays.The analysis results show that bromometry is better for the determination.It has high accuracy,and bromometry is suitable for determining the free phenol content in the thermal plastic phenol-formaldehyde resinwastewater.Free phenol content that occur during the fractional dewatering step is determined by bromometry,and the waste water of different dewatering step is recycled by different methods.更多还原