加氢润滑油基础油光稳定剂的研制

Study on Light Stabilizer for Hydrotreated Lubricating Oils

应用正交试验设计的方法,研究了自制的紫外辐射吸收剂、受阻胺类光稳定剂及抗氧剂对兰州石化总厂生产的125N加氢润滑油基础油抗光氧化降解性能的影响。发现以上各种添加剂均能提高加氢润滑油基础油抗光氧化降解的能力。在相同的辐射剂量下,添加四甲基受阻胺类光稳定剂的加氢基础油抗光氧化降解的能力优于添加五甲基受阻胺类光稳定剂;添加苯并三唑型紫外辐射吸收剂比添加二苯甲酮型紫外吸收剂的加氢基础油抗光氧化降解的能力强;紫外辐射吸收剂与受阻胺类光稳定剂之间以及紫外辐射吸收剂与抗氧剂之间均存在协同作用。并且发现,四甲基受阻胺类光稳定剂与酚类抗氧剂之间存在协同作用,而五甲基受阻胺类光稳定剂与酚类抗氧剂之间存在反协同作用。评价结果表明:添加自制的高效无灰复合型光稳定剂1.5g?L?1可使兰州炼油化工总厂生产的125N加氢润滑油基础油保持良好的光稳定性,其透光率、色度均优于添加2g?L?1目前最好的有机镍盐配合物型光稳定剂。

The effects of adding three kinds of additives ——ultra-violet absorbers, hindered amine light stabilizers （HALS） and antioxidants prepared by this work on the performances of anti-degradation and anti-deterioration against UV irradiation for 125N hydrotreated lube base oil were studied. According to the orthogonal design method, the investigation was conducted by using a self-made UV photo-degradation instrument. It is found that all these additives mentioned above are effective in preventing the mentioned oil from UV radiation-induced deterioration. Under the same radiation dose, adding tetramethyl HALS the anti-degradation ability of 125N hydrotreated lube base oil against UV catalyzed oxidation is better than that of adding pentamethy I HALS. The performances of resisting radiation-induced deterioration of 125N hydrotreated lube base oil added UV absorber of hydroxyphenyl benzotriazoles is better than that of added the UV absorber of hydroxybenzophenones. The results show that there is synergistic combination between UV absorber and antioxidant, and so does between tetramethyl HALS and phenolic antioxidant. However, an anti-synergistic combination between pentamethyl HALS and phenolic antioxidant is observed under our experimental conditions. The evaluation shows that adding 1.5g·L^-1 high efficiency ashless light stablizer prepared by this work can make the 125N hydrotreated lube base oil has a good light stability, and its transparency and colority are better than that of adding 2g·L^-1 commercially available best stabilizers of organic sulfur-containing nickel complexes.