催化氧化法制备硬质氧化蜡

实验制备的氧化蜡具有与天然巴西棕榈蜡相近的性能。考察了反应温度、反应时间、空气流速、蜡的选择和用量、催化剂用量等因素对氧化蜡质量的影响。结果表明,最佳工艺条件为:反应温度150～160℃,激发温度180～185℃,反应时间6～8 h,空气流速0.4 m3/h,石蜡用量65.0%,聚乙烯蜡用量20.0%,硬脂酸用量10.0%,氢氧化钙用量2.5%～3.0%,催化剂用量0.02%～0.05%,DTBP用量0.6%～1.0%。得到的产品具有较高的酸值、皂化值和较佳的针入度值。

Preparation of hard oxidized wax by catalytic oxidation

The oxidized wax,prepared in our laboratory,has the similar performance of natural carnauba wax.The influences of reaction temperature,reaction time,air velocity,selection and the mass of wax,catalyst on the quality of oxidized wax were researched.The results showed that the optimal conditons were as follows:the reaction temperature 150~160 ℃,the excitation temperature 180~185 ℃,the reaction time 6~8 h,the air velocity 0.4 m3/h,the mass of the paraffin 65.0%,the mass of polyethylene wax 20.0%,stearic acid 10.0%,calcium hydroxide 2.5%~3.0%,the catalyst 0.02%~0.05%,DTBP 0.6%~1.0%.The product has the higher acid and saponification value,the penetration is fitting.