in addition, the higher content of free phenol in waste water was due to the incompleted reaction resulted by the exceedingly high molar ratio of phenol to formaldehyde.
废水中挥发酚含量过高,是苯酚与甲醛的摩尔比过高,致使反应不完全造成。
consequently , the study of low cost and low content of free formaldehyde and free phenol pf resin adhesives in production and use are pressingly required.
因此,开发使用低成本、低醛、低酚的环保型酚醛树脂胶粘剂势在必行。
the free phenol removal rate of the waste water containing phenol and processed by the method can be 99 percent.
经本发明处理后的含酚废水,游离酚去除率可达99%。
on the basis of our experience, the paper describes start with prevention to reduce the free phenol content of waste water in adhesive manufacture shop.