Process for purifying benzo pollutants in waste water
A technology for benzene-based pollutants and waste water, applied in water pollutants, chemical instruments and methods, extraction water/sewage treatment, etc., can solve the problems of rectification method, high price of diethylbenzene, difficulty in recovering extractant, etc. , to achieve better separation and extraction effect, easy and safe operation, and reduce purification pressure.
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Embodiment 1
[0038] At room temperature, add n-pentane to the benzene-containing wastewater. The volume ratios of n-pentane and benzene-containing wastewater are 0.2, 0.5, 1, 2 respectively; after vigorous stirring and mixing for 5 minutes, 15 minutes, 60 minutes, and 180 minutes, stop Stir, stand for layering, take 5-10ml of the lower water sample, use acetone as internal standard, add 1-2 drops of acetone to weigh, use Varian3700 gas chromatograph for benzene content detection, chromatographic conditions: sample chamber temperature 80℃ ; Chromatographic column model OV-101, column temperature 40℃; ion head detector 120℃; carrier gas nitrogen, 30ml / min; hydrogen 30ml / min. The results are shown in Table 1. When n-pentane is used as the extractant, the comparison of benzene content in water and oil phases is shown in figure 1 .
Embodiment 2
[0040] The operation method and conditions are the same as in Example 1, replacing n-pentane with n-hexane. The test results are shown in Table 1.
Embodiment 3
[0042] The operation method and conditions are the same as in Example 1, replacing n-pentane with cyclohexane. The test results are shown in Table 1.
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