关键词: 高蜡原油, 化学清蜡剂, 减阻性能, 热力学性质, 相变, 溶解

Abstract: The selection and preparation of optimal component for paraffin removal additive were conducted by paraffin dissolving and resistance reducing to various oil base additives. The influence of temperature and solvent on paraffin dissolving effect was analyzed. The result shows that paraffin dissolved amount has little correlation with the solvent volume. Paraffin amount in solution should be controlled within the saturated amount. In addition，paraffin dissolving time should not be too long and the ideal time can be selected from 40 to 100min. According to the actual situation，0.5 g paraffin dissolved in 10 mL solvent and at heating temperature of 35 ℃ are appropriate. Solubilization by surface active agent has been observed on paraffin. The speed of dissolved paraffin can be improved only when surface active agent with HLB value in the range of 13 to 16 has been selected. The thermodynamic properties and phase change of paraffin were investigated by the DSC. The result shows that the effect of temperature is significant，and that the higher of paraffin melting point，the larger of phase change energy. The phase change energy is 29.28 J/g when paraffin melting point is 44.30 ℃.

Key words: high waxy crude oil, chemical paraffin removal additive, anti-resistance property, thermodynamic properties, phase change, dissolution