| With toluene as water carrying agent, propanediol mono linoleate was synthesized from the esterification of linoleic acid and 1, 3-propanediol catalyzed by amino sulfonic acid. The structure of the product was analyzed by infrared spectroscopy, its antiwear effect was evaluated by high frequency reciprocating friction test machine, and its effects on physicochemical properties of hydrogen cracking diesel oil were studied. The results showed that the optimal synthesis conditions of the target product were determined as follows: molar ratio of linoleic acid to 1,3-propanediol 1∶?1.1, reaction time 9 h, reaction temperature 145?℃, dosage of catalyst 0.8%. Under these conditions, the esterification rate reached 959%. The synthetic products had good antiwear property, and its WS1.4 achieved 388 μm (addition amount 200 μg/g). Meanwhile, this ester product had lower acid value, which was 0.80 mgKOH/g. As diesel antiwear agent, its main performance indexes could meet the standard requirements of antiwear agents, and the physicochemical properties of diesel oil were not affected when the ester product was added to the diesel oil. |
