Animal and vegetable oleic acid is mainly used to synthesize some products. At the same time, as a nutrient object, animal and vegetable oleic acid also has a function of synthesizing lubricating oil. Do you know what its specific methods are? The following method is for everyone to introduce.
Animal and vegetable oleic acid method 1: Add 50 kg of high-purity oleic acid to the stirred 200-liter enamel reactor, 18.75 kg of animal and vegetable oleic acid mixed fatty acid, 70% of perchloric acid 1145 ml (about 20 kg), and evacuate to 1333 Pa. The reaction temperature was controlled at 60 ° C, and the reaction was carried out for 24 hours with stirring. Then, 34.58 kg of isooctanol (2-ethylhexanol) was inhaled, and the above conditions were maintained, and the esterification reaction was continued for 4 hours.

        Then, 744.9 g of potassium hydroxide and 5000 ml of a 90% ethanol solution were mixed and melted into a homogeneous alkaline solution, neutralized in a reaction vessel, and the acid was cooled and cooled, and further cooled for 30 minutes, and the resulting salt was removed by filtration, and the solution was mixed with water and washed. After 1 hour, settle for 30 minutes. The aqueous layer was removed, and ethanol water was removed at 60 ° C and 1333 Pa, and isooctyl alcohol was removed at 100 ° C and 1333 Pa. Then, the monomeric ester was removed by molecular distillation at 16 Pa, 200 ° C to obtain a mixed polylactone, and further molecular distillation of 16 Pa, 300 ° C to obtain high purity lactone and polylactone.
Animal and vegetable oleic acid method 2: Add a certain proportion of oleic acid and animal and vegetable oleic acid (molar ratio of 2:1) to a stirred three-necked flask, heat in a water bath, and then add 10% (molar ratio) catalyst based on the starting material. Perchloric acid, microwave power 320W, reaction temperature 60 ° C, reaction time 4 h, conversion rate as high as 77.7%. The one-step and two-step method were used to synthesize palm oleic acid lactone, a catalyst for the esterification reaction in two-step process. Screening was carried out, and a high esterification rate was obtained when perchloric acid was used as a catalyst. The curve of the reaction as a function of time and the conversion ratio of the different ratios of acid to alcohol were obtained. The conditions were: reaction time, 4 h; acid alcohol molar ratio 1: 1.2. The esterification rate of palmitic acid lactone and isooctanol was 96.8%. The product was purified by molecular distillation of palmitic acid lactone isooctyl ester. The reaction product was analyzed by infrared spectroscopy and electrospray ionization mass spectrometry, and the composition of the polymer was mainly composed of dimeric palmitic acid lactone isooctyl ester. The performance of palmitic acid lactone isooctyl ester was tested, pour point -29 ° C, kinematic viscosity 17.15 mm 2 / s at 100 ° C, 114 mm 2 / s at 40 ° C, viscosity index 165, flash point higher than 300, suitable Do the lubrication.
Animal and vegetable oleic acid In the three methods of synthesizing lubricating oil, we can choose the appropriate method to prepare according to the appropriate method, so I hope the above content will help you.