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以含氢硅油、烯壬基酚聚醚与甲基丙烯酸十二酯为原料制备了一种梳型改性聚硅氧烷稠油破乳剂(GPX1),并用FTIR、1HNMR、单滴法、表面张力法、微生物降解法对聚合物GPX1进行了表征和测试。结果表明,液膜的破裂速率常数k含GPX1的自来水=0.257 46,高于k含SP169的自来水=0.218 84,说明GPX1能够有效降低液膜稳定性,加快液膜的排液速率。微生物降解性能测试结果表明,投加90 mg/L的GPX1于耗氧活性污泥中,24 h后体系中COD降到24.8 mg/L,低于空白值33.4 mg/L。破乳性能测试结果表明,GPX1与腰果酚胺醛树脂按质量比4∶6可得出最佳复配破乳剂FW1,再将100 mg/L FW1、80 mg/L聚合氯化铝与3 mg/L阳离子聚丙烯酰胺(CPAM)进行复配,对制备的乳状液破乳效果达到最佳,脱水率可达到98.32%,污水含油量为19.7 mg/L,油水界面整齐。
A kind of comb-modified polysiloxane heavy oil demulsifier (GPX1) was prepared by using hydrogenated silicone oil, nonylphenol polyether and dodecyl methacrylate as raw materials, and characterized by FTIR, 1HNMR, single drop method, Tension method, microbial degradation of polymer GPX1 were characterized and tested. The results show that the rupture rate constant k of the liquid film is 0.257246 GPX1, higher than that of tap water containing SP169 0.218 84, which shows that GPX1 can effectively reduce the stability of the liquid film and accelerate the draining rate of liquid film. The result of biodegradation test showed that the COD of the system was reduced to 24.8 mg / L 24 h after adding 90 mg / L of GPX1 to aerobic activated sludge, which was lower than the blank value of 33.4 mg / L. Demulsification test results show that, GPX1 and cashew nut amine formaldehyde resin mass ratio of 4 to obtain the best compound demulsifier FW1, and then 100 mg / L FW1, 80 mg / L polyaluminum chloride and 3 mg / L cationic polyacrylamide (CPAM). The emulsion breaking efficiency of the prepared emulsion reached the best, the dehydration rate reached 98.32%, the oil content of wastewater was 19.7 mg / L, and the oil-water interface was neat.