共查询到17条相似文献,搜索用时 62 毫秒
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粉煤灰在废润滑油再生中的应用研究 总被引:3,自引:0,他引:3
本文主要介绍粉煤灰在发电厂废润滑油再生中的应用研究。研究表明:粉煤灰是一种优良的吸附剂,节能效果十分明显,其生产成本是目前所采用的各种吸附剂的1/15~1/50,不但降低了劳动强度,而且再生油的重要指标都有所提高。 相似文献
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利用上/下位机RS485总线通信,设计废油再生分子蒸馏设备实时在线监控系统。实现了以现场优先,在生产现场和中控室的两级控制。 相似文献
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分子蒸馏条件控制对废润滑油再生馏分色度的影响 总被引:2,自引:0,他引:2
通过调节刮膜式分子蒸馏操作参数,考察了不同类型废油再生产品的透光率。结果表明,温度升高,一级再生油的透光率下降,二级再生基础油的透光率上升,废内燃机油的操作温度应控制在225℃左右,废液压油应控制在210℃左右,废混合油应控制在215℃左右为最佳;真空度升高,一级再生油的透光率上升,二级再生油的透光率下降,废内燃机油的真空度应控制在12 Pa左右,废液压油应控制在18 Pa左右,废混合油应控制在16 Pa左右为最佳;进料流量增加,一级、二级再生油的透光率均缓慢下降,因此应尽量维持较低流量。 相似文献
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短程蒸馏条件对废润滑油再生馏分色度的影响 总被引:1,自引:0,他引:1
通过调节刮膜式分子蒸馏操作参数,考察了不同类型废油再生产品透光率的变化。实验结果表明,温度升高,一级再生油的透光率下降,二级再生油的透光率上升,废内燃机油的操作温度应控制在225℃左右,废液压油的操作温度应控制在210℃左右,废混合油的操作温度应控制在215℃左右为最佳;真空度升高,一级再生油的透光率上升,二级再生油的透光率下降,废内燃机油的真空度应控制在12Pa左右,废液压油的真空度应控制在18Pa左右,废混合油的真空度应控制在16Pa左右为最佳;进料流量增加,一级、二级再生油的透光率均缓慢下降,因此应尽量维持较低流量。 相似文献
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近年来石油资源短缺和环保意识增长,废润滑油再生工艺也日益受到各国的关注。本文回顾了国内外废润滑油再生工艺的发展历程,对较典型的传统工艺如蒸馏-白土工艺、蒸馏-硫酸-白土工艺和蒸馏-加氢工艺进行了概述,并分析各类型工艺方法的优缺点。重点探讨了废润滑油再生新工艺如分子蒸馏工艺、溶剂精制工艺和膜处理工艺的优缺点和发展前景。总结国内外学者针对以上新工艺的研究,发现分子蒸馏工艺虽然对废润滑油原料的要求有些苛刻并且设备的前期投入较大,但其具有再生废润滑油效率高、品质好等优点,适合大型工业化;超临界流体与膜耦合技术继承了两种技术的优点,大幅提升了废润滑油再生速度和效果,随着机械强度大、化学稳定性好的无机膜材料和超临界流体萃取工艺的快速发展,该项技术也必将成为废润滑油再生的研究热点。 相似文献
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我国废润滑油再生行业的现状及发展前景 总被引:3,自引:0,他引:3
调查了废润滑油再生处理的主要方式和环境因素,对国内废润滑油再生行业的政策法规状况进行了总结,对国内废润滑油再生行业的发展前景进行了展望,同时为我国废润滑油再生行业的正规化、专业化和规模化发展之路提出了建议。 相似文献
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Sena Cetinbas Cansu Ekin Gumus-Bonacina Aziz Tekin 《Journal of the American Oil Chemists' Society》2022,99(2):175-179
Squalene was recovered from an olive oil deodorizer distillate (OODD) containing 40% of squalene by a two-step process. The first step was to esterify the free fatty acids (FFAs) to make them less volatile. The second step was to separate the squalene by molecular distillation. The best esterification conditions were found to be 190°C and 360 min, where FFA content of the reaction mixture was reduced from 49.3% to 7.9%, however, an inevitable squalene loss (30%) was also observed due to a discontinuous operation. The remaining squalene (28%) in the esterified mixture was then distilled using a molecular distillation unit at elevated temperatures (190–230°C) and pressures (0.05–5 mmHg). When the temperature and vacuum during distillation increased, FFA content in the distillate reduced while distillate yield and squalene purity increased. The highest distillate yield (27.7%) and squalene purity (98.1%) were obtained at the highest applied temperature (230°C) under the lowest absolute pressure (0.05 mmHg), where FFA content of distillate was measured as 1.8%. High percentage of squalene (95%–98%) could be distilled at 230°C between 0.05 and 0.5 mmHg absolute pressures. The overall squalene recovery after all treatments was calculated as 68%. 相似文献
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Maurício Dalla Costa Rodrigues da Silva Eluize Vayne Maziero Cristiano Augusto Ballus Eduardo Hiromitsu Tanabe Daniel Assumpção Bertuol 《加拿大化工杂志》2024,102(4):1658-1669
Waste edible oils are an alternative source of high-value natural compounds. Vitamin E can be recovered from palm oil refining residues by molecular distillation. However, the presence of other lipophilic molecules compromises the selective separation of vitamin E. Esterification of the free fatty acids can enhance the selective separation of vitamin E by molecular distillation, but the conditions for carrying out the reaction need to be investigated to simultaneously ensure the conversion of free fatty acids and the reduction of vitamin E losses. Thus, this study investigated the effect of the esterification of the industrial waste on the recovery of vitamin E by molecular distillation. Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), and analysis for fats and oils preconized by the American Oil Chemists' Society (AOCS) were used in the characterization of the industrial waste. Determination of the best condition to carry out the reaction was obtained by a central composite rotational design (CCRD) using the response surface methodology (RSM) and the desirability profile. The results showed that the best condition for the esterification was at 64°C, 213 min, 2 wt.% sulphuric acid, and a 10/1 methanol/free fatty acids molar ratio. This reaction condition achieved 97.9% conversion of free fatty acids and less than 3% of vitamin E loss. The esterification promoted concentration of vitamin E in the residue stream (145.4%) and reduction in the distillate stream (87.8%). Therefore, the obtained results presented a suitable route to obtaining vitamin E concentrate and adding value to an industrial residue. 相似文献