高粘度减压馏分油NMP精制小试研究

以某炼厂高粘度润滑油馏分油为原料,进行了NMP溶剂精制的小试研究.首先进行单级抽提试验,然后通过正交试验并借助数学手段,确定了NMP精制的适宜操作条件.在此基础之上,进行了NMP的假三段抽提试验及脱蜡试验.结果表明,无水抽提适宜操作条件为:抽提温度87℃,剂油体积比为0.75,在相同条件下,NMP单级抽提精制油收率为9...

Laboratory Trail Study on NMP Refining of High-Viscosity VGO

Single stage refining of high-viscosity lubricating oil using N-methyl-2-pyrrolidone(NMP) was carried out.The suitable operating conditions of the NMP refining were determined by orthogonal test and mathematical ways.On this basis,a simulate-three-stage extraction and dewaxing tests of NMP were done.The results show that the operation conditions of NMP anhydrous extraction are as follows: extracting temperature 87 ℃,the volume ratio of solvent to oil is 0.75.Under same conditions,NMP anhydrous single-stage extraction are as follows: the yield of refined oil is 90.1%,the refractive index is 1.464 5 at 60 ℃.NMP anhydrous simulate-three-stage extraction are as follows: the yield of refined oil is 90%,the refractive index is 1.462 2 at 60 ℃.Volume fraction of water 1.5% of extraction suitable operating conditions are as follows: extracting temperature 88.5 ℃,the volume ratio of solvent to oil is 1.38.Under same conditions,NMP single-stage extraction are as follows: the yield of refined oil is 87.7%,the refractive index is 1.463 1;NMP simulate-three-stage extraction are as follows: the yield of refined oil is 87%,the refractive index is 1.461 0 at 60 ℃.From refractive index changes to know that the effect of simulate-three-stage test is better than single-stage extraction test.