The treatment of the filtrate of black papermaking liquor after lignin extraction in Acid Precipitation has been studied with five kinds of flocculant ferric sulfate, ferrous sulfate, potassium ferrate, polysilicon ferric sulfate and polyferric sulfate respectively.
研究了硫酸铁、硫酸亚铁、高铁酸钾、聚铁、聚硅硫酸铁分别作为混凝剂对草浆黑液酸析木质素后滤液的混凝处理,试验结果表明,硫酸铁的处理效果好,且操作工艺简单,在此基础上,采用三因子二次回归正交试验设计安排实验,研究证实原水样的CODCr值、混凝剂投加量以及助凝剂投加量是影响混凝试验的重要因素,并建立了回归方程。
According to chemical analysis principle, the article puts forword a way to determine invasion filtrate volume through analysing change tendencies of some ions'contents in oil produced during well testing.
以胜利油田具有代表性的埕北１２—１井为实例，计算出该并滤液侵入量，认为污染不严重，污染来源为钻井液，固井液等的污染可视为零。
The paper studied the synthesis of allontoin with glyoxaic acid,urea and filter liquor.
采用乙醛酸、尿素和回收滤液为原料，混酸为催化剂，经真空蒸馏缩合制得尿囊素。
