复合铝基润滑脂的制备研究

以异丙醇铝为原料制备复合铝基润滑脂,考察最高炼制温度、皂化有机酸的反应顺序、急冷油加入量、复合铝皂稠化剂的组成、基础油种类等对复合铝基润滑脂理化性能的影响;通过红外光谱分析手段监控研究复合铝皂的生成和复合铝基润滑脂的制备过程;根据实验得到的最佳生产工艺和配方,在中型装置上进行放大试验。结果表明:复合铝基润滑脂的最佳制备条件为基础油选择150BS,用1/3质量的150BS作急冷油,硬脂酸和苯甲酸同时与异丙醇铝反应,硬脂酸、苯甲酸、异丙醇铝的摩尔比为1∶1∶1.2,最高炼制温度控制在180~190℃;利用红外光谱分析可以很好地监测该制备过程;所研制的复合铝基润滑脂产品具有良好的机械安定性、胶体安定性、防腐防锈性、抗水性和抗磨性,可满足美国海军舰船用润滑脂A-A-50433规范要求。

PREPARATION OF ALUMINUM COMPLEX GREASE

The preparation of aluminum complex grease using aluminum isopropoxide as raw material was studied. The effects of the reaction temperature, the reaction sequence of organic acid saponification, the amount of quench oil, the composition of aluminum complex soap and the type of the base oils on the physicochemical properties of the product were investigated. Infrared spectroscopy was used to monitor the synthesis of aluminum complex soap and complex grease. The scale up test was conducted on pilot plant. The materials used are 150BS, where 1/3 is used as quench oil, stearic acid and benzoic acid which react with aluminum isopropoxide at the same time. The optimal reaction conditions are: the molar ratio of stearic acid, benzoic acid and aluminum isopropoxide is 1: 1: 1.2, the maximum refining temperature is controlled at 180-190℃. The preparation process can be well monitored by infrared spectroscopy. The aluminum complex grease prepared has a good performance in mechanical stability, colloidal stability, anti-corrosion and anti-rust, water resistance and abrasion resistance, and meets the US Navy ship grease AA-50433 specification.