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合成型汽车制动液的制备 总被引:1,自引:0,他引:1
介绍了合成型汽车制动液的特性合成机理、国内外发展现状,论述了固体酸合成以聚乙二醇醚为主体汽车制动液的优点,指出了国内汽车制动液的发展方向。 相似文献
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江镇海 《精细与专用化学品》1997,(15)
由无锡炼油厂研制开发的T104-1型高性能汽车制动液,最近在无锡通过了江苏省科委组织的技术鉴定。 该汽车制动液是目前国内唯一全面达到桑塔纳轿车配套及同类型车辆配套的高性能制动液。该产品主要由高沸点的醇醚稀释剂、硼酸 相似文献
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介绍了制动液标准的历史沿革和近代各国通用标准,以及近年来随着汽车工业的发展,对新一代(DOT-4级)硼酸酯型制动液的开发和研制。 相似文献
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新型通用皮碗,是一种适应醇型油,矿油型、合成油型,三种不同制动液的新型制动皮碗。从我国引进汽车和建立自己汽车工业有史以来,汽车液压制动的皮碗除进口外,均以天然橡胶制造。由于国内外汽车工业日益发展液压制动液成倍增长,即醇型油无法适应跟上需要。(蓖麻油加丁醇混合物)矛盾十分尖锐。由于醇型油是蓖麻油和乙醇配制,均为植物油和粮食制作,又是国防工业不可缺少的重要原料。在原石化部和商业部的重视下,对汽车液 相似文献
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介绍了适用于江淮地区通用型汽车使用的质优价廉的汽车制动液。从使用技术要求,工艺配方改进,降低制造成本和市场售价等方面讨论汽车制动液的开发与应用。 相似文献
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介绍了超临界流体中化学反应的特点及基础理论研究,简要评述了超临界流体作为反应介质的酶催化反应、超临界水氧化反应、金属有机反应和超临界流体作为反应原料的超临界CO2、超临界CO加氢反应。 相似文献
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压裂技术是提高低渗透油气藏生产能力和油气井采收率的重要手段,而压裂液是影响压裂效果的关键因素。相较于水基植物胶压裂液和以单链表面活性剂为稠化剂的传统清洁压裂液,双子表面活性剂类清洁压裂液在耐温、携砂和保护油气层等使用性能上更具优势,是新一代清洁压裂液发展重点。本文综述了双子表面活性剂类清洁压裂液制备、性能及应用的研究进展,分析比较了阳离子双子表面活性剂类清洁压裂液、阴离子双子表面活性剂类清洁压裂液、两性双子表面活性剂类清洁压裂液等的优缺点,讨论了双子表面活性剂类清洁压裂液在油田领域的应用现状:阳离子双子表面活性剂类清洁压裂液的制备方法成熟,耐温性能较好,可以应用于中高温油田,但是其生产成本较高;阴离子双子表面活性剂类清洁压裂液能有效减少表面活性剂在地层的吸附损失,降低储层渗透率伤害,但是其合成条件苛刻,耐温性不高,适用于中低温油田;两性双子表面活性剂类清洁压裂溶液的耐温性好,但是其制备过程繁琐、成本高,难以大规模推广应用。对双子表面活性剂类清洁压裂液的研究前景进行了展望:发展低成本的合成方法及耐高温双子表面活性剂类清洁压裂液的制备及应用。 相似文献
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本文研究了层流区域有较大叶片截面积的特型双螺带──锚桨叶在高粘弹性和非弹性流体中的搅拌功率,测定了K_p和K_s,采用广义二阶流体本构方程导出搅拌功率计算式参数f_s和F_(1ac)由实验数据确定。该式适用于牛顿型流体、假塑性和粘弹性流体的功率消耗计算。 相似文献
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Saeed Mortazavi 《中国化学工程学报》2017,25(10):1360-1368
The flow of pseudoplastic power-law fluids with different flow indexes at a microchannel plate was studied using computational fluid dynamic simulation.The velocity distribution along the microchannel plate and especially in the microchannel slits,flow pattern along the outlet arc and the pressure drop through the whole of microchannel plate were investigated at different power-law flow indexes.The results showed that the velocity profile in the microchannel slits for low flow index fluids was similar to the plug flow and had uniform pattern.Also the power-law fluids with lower flow indexes had lower stagnation zones near the outlet of the microchannel plate.The pressure drop through the microchannel plate showed huge differences between the fluids.The most interesting result was that the pressure drops for power-law fluids were very smaller than that of Newtonian fluids.In addition,the heat transfer of the fluids through the microchannel with different channel numbers in a wide range of Reynolds number was investigated.For power-law fluid with flow index (n =0.4),the Nusselt number increases continuously as the number of channels increases.The results highlight the potential use of using pseudoplastic fluids in the microheat exchangers which can lower the pressure drop and increase the heat transfer efflciency. 相似文献
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Feng Ling Yang Shen Jie Zhou Cui Xun Zhang Gui Chao Wang 《Korean Journal of Chemical Engineering》2013,30(10):1843-1854
Mixing of two stratified miscible fluids in an eccentric stirred tank agitated by a four pitched-blade turbine was studied by using the detached eddy simulation (DES) model and volume of fluid (VOF) method. The fluids were operated in the transitional and mildly turbulent flow regimes. Interfaces between the two miscible fluids during the mixing processes were captured and mixing times were computed. Effects of the Richardson number and eccentricity on the mixing times were quantificationally analyzed. Results show that the spatial and temporal variations of volume fractions of the fluids can be well captured by the method presented in this study. Mixing time increases with the increase of Richardson number. Effect of eccentricity on mixing time depends on Richardson number and the eccentric agitation scheme is not advisable to use to blend the low-viscosity miscible fluids starting from a stratified state, especially for lower Richardson values. 相似文献