Complexation Extraction And Resources Utilization Of Phenolic Compounds From Waste Lye In Oil Refinery

Waste lye was produced in the oil refining process in refineries after alkali cleaning oil in order to obtain petrol products. It consisted of high concentration of phenols, sulfides, oils and other pollutants. In this thesis, waste lye in oil refinery as the research object, phenolic compounds have been reduced through the acidification pretreatment and complexation extraction process, these laid the foundation for further biological treatment of waste lye. Meanwhile, recovery of phenols from waster lye in oil refinery and utilization of phenolic compounds have been studied.In this thesis, phenols have been extracted from waste lye by using tributyl phosphate(TBP) as extraction agent, waste ratio of extraction agent has been discussed by multistage extraction. The extraction kinetics of phenolic compounds have been measured by the constant interfacial cell with laminar flow, effects of stirring speed, temperature, specific area, phenol concentration and extraction concentration on the extraction rate have been studied, and the extraction mechanism has been discussed in detail.The experimental results indicated that, under conditions of the initial pH<8, the temperature in 20～30℃, the volume fraction of TBP in 25～30%, the extractability of phenol by TBP were over 98% when the initial concentration of phenol for 12000～14000mg/L. Studing on extraction kinetics of phenolic compounds showed that phenols extraction was diffusion-controlled regime, and the rate equation could be expressed as: R=kf1[ArOH(w)]·[TBP(o)]-kb[ArOH(o)], the extraction of phenols by TBP was first order reaction. According to the characteristic of phenolic compounds which have been extracted from waste lye, phenolic resin-based activated carbon was prepared by recovery of phenolic compounds had been discussed. It can attain certain adsorption effect of phenols, and it can be used as catalyst, carrier, adsorption material, electrode material, et al.The results showed that, through the investigation of the extraction and reverse extraction process parameters and the control model judgement of extraction dynamics of phenols, it could provide data for further industrialization, more effective measures can be taken in engineering application in order to improving extraction rate. Phenolic compounds recovery from waste lye made into carbon microspheres was one method of waste resources utilization.