共查询到18条相似文献,搜索用时 623 毫秒
1.
评价了6种超高碱值磺酸钙的热氧化安定性.曲轴箱模拟试验证明,在4030中速船用柴油机油和CD15W -40柴油机油中,部分超高碱值磺酸钙替代高碱值磺酸钙是可行的. 相似文献
2.
3.
4.
5.
以高碱性磺酸钙和高碱性环烷酸钙为主要金属清净剂开发的70TBN船用气缸油,通过建立实验室模拟评定船用气缸油方法、配方筛选和Bolnes发动机台架评定,最后通过远洋船舶实船试验考核,证明其性能相当于国外大石油公司的70TBN船用气缸油水平,完全能够满足远洋船舶使用高硫燃料的润滑要求,已于1997年底通过专家鉴定,可以推广使用。 相似文献
6.
7.
8.
在有水环境中使用的磺酸钙润滑脂易受到水的污染,造成磺酸钙润滑脂变稠(工作锥入度下降),减少了磺酸钙润滑脂中基础油的析出,影响润滑效果.针对磺酸钙润滑脂遇水工作锥入度下降的问题,用滚筒试验(20%水,室温,2 h)就磺酸钙复合转化剂及转化参数(转化温度,转化时间及搅拌速度)对磺酸钙润滑脂抗水性能的影响进行了考察和优化.在... 相似文献
9.
复合磺酸钙基润滑脂具有优异的综合性能而被广泛应用,不断提高和完善复合磺酸钙基润滑脂的综合性能对于推动绿色发展、提高资源的利用率有着重大的意义,预测复合磺酸钙润滑脂将可能会成为润滑脂的主要发展方向。为此,就钛粉对复合磺酸钙基润滑脂理化性能,胶体结构,抗燃性能和高温摩擦学特性的影响进行了考察,以期进一步提高和改善复合磺酸钙基润滑脂的综合性能。结果表明,钛粉对复合磺酸钙基润滑脂理化性能和胶体结构基本没有影响,能够降低复合磺酸钙基润滑脂的高温摩擦因数,并显示出了优异的抗磨损性能,提高了复合磺酸钙基润滑脂的高温(120℃)摩擦学特性,同时高含量(2.5%质量分数及以上)的钛粉有助于提高复合磺酸钙基润滑脂的抗燃性能。(图6表1参考文献17) 相似文献
10.
《新疆石油科技》2014,(3)
在对高碱值硼化石油磺酸钙的制备进行大量试验的基础上,确定了高碱值硼化石油磺酸钙的合成工艺过程及条件。合成分为2个阶段,第一阶段为合成高碱值石油磺酸钙,关键是石油磺酸铵转化为石油磺酸钙的碳酸化反应过程;第二阶段为合成高碱值硼化石油磺酸钙,关键是石油磺酸钙转化为硼酸钙的硼化反应过程。合成试验结果表明:高碱值石油磺酸钙的合成,确定碳酸化反应时间为135 min,反应产物的碱值为319.2 mgKOH/g,相应运动粘度为35.6 mm2/s;高碱值硼化石油磺酸钙的合成,硼化反应时间为60min,反应产物的总碱值为282.7 mgKOH/g,硼含量为6.03%;且在常温下流动性好,制备出的高碱值硼化石油磺酸钙完全能够满足质量指标的要求。 相似文献
11.
MUIR Ronald J 《润滑油》2009,24(2)
Overbased calcium sulfonate is used widely as detergent in automotive and marine lubricants, as well as various industrial oil applications. In this paper, the process to produce overbased calcium sulfonate is overviewed. The sulfonate structure and molecular weight and its molecular weight distribution, the enclosed calcium carbonate nanoparticle size and crystalline structure, properties of the carrier oil, all influence its properties, such as stability, viscosity, and detergency of the system. 相似文献
12.
高碱值清净剂是内燃机油中不可或缺的一种添加剂,主要用于提高内燃机油的性能。近年来的研究发现,高碱值清净剂具有良好的抗磨性能。文章总结了高碱值清净剂的抗磨性,以高碱值磺酸钙为例,介绍了摩擦后高碱值磺酸钙在金属表面形成的含钙保护膜,包括保护膜的形态、组成及结构。列举了其他种类清净剂的抗磨性,并对全配方汽油机油中不同种类高碱值清净剂的抗磨性做了比较。介绍了方解石型高碱值磺酸钙抗磨性要优于无定形高碱值磺酸钙,二烷基二硫代磷酸锌与高碱值清净剂复合后抗磨性的变差。通过综述高碱值清净剂的抗磨性,为其抗磨性的发挥和内燃机油的配制提供参考。 相似文献
13.
Hassanin A. Rashid Ahmed A. Alhassan A. Abdulsalam 《Petroleum Science and Technology》1990,8(8):899-916
Infrared absorptions of TLC subtractions of used motor oil, original oil, base oil and the additive, indicate the transformation of the polar and nonpolar components by further oxidation and oxidative degradation of carbonyl compounds into acids, esters and peroxides. Organic nitrates and nitro compounds were also detected after 2000Km and 3000Km service. The effects of basic calcium sulfonate additives, starting with used oil l000Km, 2000Km, 3000Km service, vacuum distillates of used oils and base oil, were studied. It has been found that the dispersant properties of these sulfonates are profoundly influenced by their structure. The alkalinity of the calcium sulfonate additive was determined by spectroscopic-IR method. 相似文献
14.
Hassanin A. Rashid Ahmed A. Alhassan A. Abdulsalam 《Petroleum Science and Technology》2013,31(8):899-916
ABSTRACT Infrared absorptions of TLC subtractions of used motor oil, original oil, base oil and the additive, indicate the transformation of the polar and nonpolar components by further oxidation and oxidative degradation of carbonyl compounds into acids, esters and peroxides. Organic nitrates and nitro compounds were also detected after 2000Km and 3000Km service. The effects of basic calcium sulfonate additives, starting with used oil l000Km, 2000Km, 3000Km service, vacuum distillates of used oils and base oil, were studied. It has been found that the dispersant properties of these sulfonates are profoundly influenced by their structure. The alkalinity of the calcium sulfonate additive was determined by spectroscopic-IR method. 相似文献
15.
According to the conductivity test results,it is found that oil conductivity increases with an increasing additive content,and the turbidity of engine oil is also augmented with an increasing additive content.After testing the turbidity and stability of oils containing the typical conventional calcium sulfonate,the overbased calcium sulfonate and the mixture of the above two calcium sulfonates,the results show that at the same amount of additives used,the oil with a higher turbidity demonstrated a worse stability.A nonionic dispersant that was added into lube oils at a definite concentration could improve the detergent compatibility.For this reason,the sediment volume in three kinds of oils all decreased obviously,resulting in successful improvement of storage stability of marine engine oils. 相似文献
16.
E. V. Kobylyanskii G. G. Kravchuk O. A. Makedonskii Yu. L. Ishchuk 《Chemistry and Technology of Fuels and Oils》2002,38(2):110-114
The effect of different components on the structure of ultrabasic calcium sulfonate during formation of a complex system was investigated by potentiometric titration and IR spectroscopy. Colloidal calcium carbonate has a calcite structure in the initial simple ultrabasic calcium sulfonate, in the intermediate model systems containing calcium tetraborate or 12–hydroxystearate, and in the final ultrabasic calcium sulfonate, and this structure does not change on conversion of the simple sulfonate grease into a complex grease. Micelles of the complex ultrabasic sulfonate grease consist of nuclei containing colloidal calcium carbonate and tetraborate coated with a calcium sulfonate and 12–hydroxystearate adsorption shell. 相似文献
17.
18.
采用沉淀值、溶解试验及微粒粒径测量等试验对柴油机油常用添加剂单剂和添加剂复配后体系的稳定性进行考察,并应用红外光谱分析、粒径分析及碰撞理论等手段对添加剂之间相互作用的机理进行了研究。结果表明:添加剂单剂中高碱值烷基苯磺酸钙的稳定性最差,其次为高碱值硫化烷基酚钙,其它添加剂的稳定性较好;高碱值烷基苯磺酸钙与高碱值硫化烷基酚钙复配时会产生大量沉淀,两者之间无化学反应发生,但颗粒相互碰撞,形成更大的颗粒,从而使体系不稳定;无灰分散剂的引入有利于高碱值烷基苯磺酸钙胶体结构的稳定,两者复配时,无灰分散剂利用其空间位阻效应使高碱值烷基苯磺酸钙的稳定性提高。 相似文献