共查询到19条相似文献,搜索用时 94 毫秒
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以混合溶剂精制润滑油 总被引:3,自引:0,他引:3
以混合溶剂精制润滑油杨卓如黄洪杨晓燕兰仁华陈焕钦(华南理工大学化工学院,广州510641)关键词润滑油溶剂精制糠醛1前言目前,我国在润滑油精制过程中仍主要用糠醛作为溶剂。糠醛精制装置占溶剂精制装置的75.8%,其精制工艺已趋于成熟。预计糠醛精制仍将... 相似文献
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润滑油糠醛加助溶剂精制技术的研究进展 总被引:3,自引:0,他引:3
综述了国内外润滑油糠醛加助溶剂精制的研究进展,主要介绍了在糠醛中加入表面活性剂、轻质烃、环氧氯丙烷、脱酸助剂、脱氮助剂、DMF等的研究结果,认为润滑油糠醛加助溶剂精制技术将是今后润滑油精制的发展方向. 相似文献
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采用“溶剂精制-白土/活性炭吸附”和“减压蒸馏-溶剂精制”两种工艺对摩托车废润滑油进行再生研究,实验表明,后者的效果较为显著。在“减压蒸馏-溶剂精制”的工艺中,将减压蒸馏收集的第二馏分作为主要馏分,并用糠醛和N-甲基吡咯烷酮(NMP)对其进行精制,通过正交实验得到了两种溶剂的最佳精制条件。糠醛精制的最佳条件:精制温度为80℃,精制时间为60min,剂油比为1.5:1,而NMP精制的最佳条件:精制温度为30℃,精制时间为60min,剂油比为3:1。在该工艺中,精制油品的收率都在80%以上。通过对精制后的油品进行润滑油脂润滑性模拟试验(四球磨试验)。结果显示NMP的精制效果比糠醛好。实验还对废润滑油和新润滑油进行了热重分析,结果表明润滑油的主要成分并没有发生变化。 相似文献
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废润滑油再生工艺技术 总被引:7,自引:0,他引:7
介绍了几种典型的国内外成熟的废润滑油再生工艺技术,它们分别是:预处理一薄膜蒸发-白土精制;预处理-薄膜蒸发-加氢精制;溶剂抽提-普通蒸馏。本文从工艺流程、操作条件、环境保护、经济性等方面对3种工艺加以比较,剖析了国内目前废润滑油再生工业现状,对将来的发展和改进提出了一些建设性意见。 相似文献
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本研究以糠醛为主溶剂[1],正丁醇为辅助溶剂回收废润滑油,并在改善油品质量的同时提高油品的收率.通过考察不同精制温度与剂油比对油品质量以及收率的影响,并且多次实验得出辅助溶剂的最佳加入量.通过实验以及对产品润滑油性能的检测得出剂油比(体积比)为2:1,精制温度为85℃,辅助溶剂添加量(正丁醇:糠醛,质量比)为15%时,... 相似文献
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The kinetics of waste automobile lubricating oil have been studied experimentally and modeled mathematically. Experiments were carried out in the tubing bomb microreactor at a temperature of 420–440°C and reaction times of 5–50 min. Volatile pyrolysis products were identified and quantitatively determined by gas chromotography. A lump model of combined series and parallel reactions for oil formation is proposed. Conversion data fitted first order kinetics for C5–C11 and C12–C25. The kinetic parameters were determined by nonlinear least-squares regression of the experimental data. These calculated values of the product distribution were found to be in agreement with the experimental data. 相似文献
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Different subsequent refining techniques including solvent dewaxing and solvent extraction have been used to produce lubricating base oil from slop wax waste by-product. The solvent dewaxing technique was performed using two different solvent mixtures of methyl ethyl ketone and toluene with and without benzene at different dilution solvent ratios and at different dewaxing temperatures. The solvent extraction technique was carried out using N-methyl-2-pyrrolidone solvent at 90 °C and at constant dilution solvent ratio of 3:1 by weight. The resulting data revealed that the highest yield of lubricating base oil having the lowest pour point (−6 °C) and the highest iso- and cyclo-paraffins to n-paraffins ratio (5.11) is obtained by solvent dewaxing process only. While the lowest yield of lubricating base oil having the highest pour point (−1 °C) and the lowest iso- and cyclo-paraffins to n-paraffins ratio (4.08) is obtained using solvent dewaxing followed by solvent extraction process. These lubricating base oil products, especially the one that having the lowest pour point (−6 °C) matches the principal characteristics of AX 973853 type of premium low viscosity textile machinery oils obtained by Mobile Velocite Oil Company. 相似文献