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焦化厂的煤焦油是在高温隔氧条件下形成的,而烟煤冷煤气站废水中的煤焦油是在中温不断供给空气、水蒸汽等条件下形成的,一般含重馏份较高,在废水中除少数呈浮油、溶解油状态存在外,大部份是以高度分散的乳化油状态存在。焦化厂的煤焦油测试研究工作进行较多,而烟煤冷煤气站煤焦油的测试工作进行较少。本文从控制分析与环境监测出发,对重量法,紫外吸光光度法测油的萃取条件以及将萃取物蒸除石油醚的方法进行了研究。一仪器与试剂 751G分光光度计(上海分析仪器厂): 730型紫外可见分光光度计(上海第二分析议器
Coal tar in the coking plant is formed under high temperature and oxygen barrier conditions. Coal tar in the waste gas of the bituminous coal cold gas station is formed under conditions of continuous supply of air and water vapor at medium temperature. Generally, heavy coal tar is contained in the waste water In addition to a small number of oil slick, dissolved oil exists, most of the highly dispersed emulsified oil exists. Coking plant coal tar test work more, and bituminous coal gas station coal tar test less. In this paper, starting from the control analysis and environmental monitoring, the gravimetric method, the UV extraction spectrophotometric method and the petroleum ether extraction method were studied. An instrument and reagent 751G spectrophotometer (Shanghai Analytical Instrument Factory): 730 UV-visible spectrophotometer (Shanghai Second Analyzer