共查询到18条相似文献,搜索用时 93 毫秒
1.
2.
3.
4.
5.
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
6.
7.
8.
《精细化工原料及中间体》2016,(6)
正扬子石化研究院开发的废白土绿色再生技术,化固体废弃物为再生资源,循环利用于芳烃精制脱烯烃工艺,彻底解决了被江苏省界定为固废的废白土的处置难题,同时使吨废白土处置费用降低了500元,申报了3项发明专利。扬子石化公司芳烃联合装置生产过程中脱除其中的乙烯,每年产生的废弃白土约600吨。此前,废弃白土主要采用 相似文献
9.
废润滑油再生新工艺采用AG破乳吸水剂,脱除乳化溶解态的水分,再经白土吸附处理。使废润滑油再生。用本工艺对大连二家工厂的废润滑油进行了最佳操作条件的研究。经过预沉的废油中加入1%的AG剂和6%的白土,在70℃下搅拌20min,静置24h后再过滤可得到理化指标合格的再生油。无污染,收率高,操作费用低,已转让生产。 相似文献
10.
中国石油化工股份有限公司镇海炼化分公司(镇海炼化)炼油五部芳烃装置R401白土塔用于脱除芳烃中的微量烯烃杂质,更换周期为10~20 d,频繁更换导致装置运行压力大,同时产生大量固体废弃物。为减轻装置负荷和环境压力,镇海炼化于2014年12月采用中海油天津化工研究设计院有限公司开发的TCDTO-1系列分子筛精制剂(型号CXR-1)来替代普通白土。分子筛精制剂目前运行2个周期,运行结果表明精制剂具有优良的脱烯烃性能,同时不对原料组分造成影响,新鲜精制剂运行寿命达到普通白土的12倍,再生后精制剂运行寿命达到普通白土的14倍。分子筛精制剂的应用明显改变了使用白土所带来的更换过程劳动强度大、现场安全隐患多和固废造成环境污染等状况。 相似文献
11.
对废汽轮机油进行了再生研究。选用吸附能力比较强的活性白土为原料,采用实验室自制的经过引入无机高分子以后的改性活性白土为主要吸附剂,利用再生后油的透过率的变化,对再生条件进行了研究。再生条件:温度55 ~65 ℃;搅拌时间20~30 min,根据汽轮机油劣化的程度不同,通过实验确定所加的吸附剂量一般为5% ~20 % 。再生后的油送检测单位检验,再生前后对比:水溶性酸碱pH4-9/5-8,酸值0-0596/0-0057 mg KOH/g,破乳化度( 搅拌法)50/1 min。结论:再生效果较好,达到新油标准。再生后废油的回收率可达85% 左右。 相似文献
12.
利用天然纳米硅酸盐黏土矿物的独特层状结构与晶体表面特性制备出具有纳米三维孔道结构的新型硅铝矿物吸附剂,并对所得纳米多孔材料的性能进行相应的表征及废变压器油吸附再生应用研究,通过吸附再生条件考察确定了最佳吸附条件。对吸附前后变压器油理化性能及电气性能分析结果表明,利用上述吸附剂吸附处理废变压器油后变压器油性能明显改善,耐压性、体积电阻率、界面张力、介质损耗因素、酸值等指标完全符合国家标准,可以实现废变压器油的高效吸附及再生,显著降低了成本,并避免了环境污染及资源浪费。 相似文献
13.
Peng-Lim Boey Shangeetha Ganesan Gaanty Pragas Maniam 《Journal of the American Oil Chemists' Society》2011,88(8):1247-1253
Landfill bound waste from the oil palm industry, spent bleaching clay (SBC) containing significant amounts of adsorbed crude
palm oil (CPO) has the potential to be used for biodiesel production. In this study, SBC was subjected to ultrasound-aided
in situ transesterification with a co-solvent to convert the oil into methyl esters (biodiesel). Optimized reaction conditions
used were 5.4 wt% KOH, methanol to oil mass ratio of 5.9:1 and 1:1 mass ratio of co-solvent (petroleum ether or ethyl methyl
ketone) to SBC. The remaining bleaching clay was calcined at 500 °C for 30 min and reutilized for bleaching. Absence of –CH
absorption peaks in the FTIR and TGA-FTIR analysis of regenerated clays shows the regeneration efficiency of the method. In
situ transesterification and heat regeneration helped to restore pores without adversely affecting the clay structure. The
use of ethyl methyl ketone (EMK) as the co-solvent in the in situ transesterification process produced clay with better bleaching
qualities. 相似文献
14.
15.
16.
In this work the effect of spent diatomaceous earth (SDE), as pore forming or silica carrier, on the properties of clay ceramic bricks was investigated. Mixtures of clay and SDE waste were, compacted, dried and fired at 950°C during 6?h. The technological properties of waste-clay bricks were analysed to evaluate the influence of the waste incorporation. The SDE (1–5?wt-%) addition in the clay matrix causes a reduction between 6 and 12% of the bulk density compared with the control samples (only clay) which implies good insulating characteristics. In addition, the waste incorporation increases the water absorption within the range 4–31% and decreases the compressive strength between 12 and 26%. However, the incorporation of the waste is beneficial as no remarkable changes in the technological properties are observed. These results indicate that the waste has a predominant pore forming effect over a pore filling effect. 相似文献
17.
18.
The utilization of clay wastes (CW) containing boron as cement additives was investigated. The effect of CW on mechanical and chemical properties of cement prepared by adding CW to clinker and gypsum was determined. The results obtained were compared with Portland cement properties and Turkish standards (TS) values. It was determined that the first clay waste (CW1) and the second clay waste (CW2) may be used as cement additives up to 5% and 10%, respectively. 相似文献