柴油机油添加剂的稳定性研究  

STABILITY OF ADDITIVES IN DIESEL ENGINE OILS

作　　者：张倩[1] 安谧 

机构地区：[1]中国石化石油化工科学研究院,北京100083 [2]中国石油石油化工研究院

出　　处：《石油炼制与化工》2016年第4期71-75,共5页Petroleum Processing and Petrochemicals

摘　　要：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。The stability of diesel engine oil additives （single or composite） is investigated by sedi- ment, solubility test, and particle diameler measurement. The interaction mechanism in composite addi- tive was studied hy FT-IR, laser particle analyzer granulometry, and Wiegnor colliding theory. The re suhs show that overbased calcium alkylhenzene sulfonate is found to have the worst stability followed by overhased sulfurized calcium alkylphenolate. Other additives have good stability. A lot of sediment is found when overbased calcium alkylhenzene sulfonate mixes with overbased sulfurized calcium alkylphe- nolate Because forming larger particles through collision of the small particles, resulting in unstable colloid system, but no interaction is occurred. The addition of ashless dispersants makes the overbased calcium alkylbenzene sulfonate more stable because of the space steric effect of the dispersant.

关 键 词：添加剂 稳定性 胶体结构 相互作用 

分 类 号：TE624.82[石油与天然气工程—油气加工工程]