一种环保型重油乳化剂的合成

采用正交实验设计探讨了环保型重油乳化剂聚乙二醇400双油酸酯的合成工艺条件,确定其最佳反应条件为:反应体系绝对压力0.07MPa,原料油酸与聚乙二醇400的摩尔比3.0,反应时间8 h,催化剂对甲苯磺酸的质量分数1.5%。综合评价结果表明,在此条件下制备的重油乳化剂纯化后具有很好的乳化性能,其亲水亲油平衡(HLB)值为6.1,乳化稳定时间为6.23 min;其与失水山梨醇单油酸酯Span 80(HLB值为4.3)复合后的产物(其HLB值为5.0)对重油的乳化功效高,达到了中微乳指标的要求。

Synthesis of environmental protection type emulsifier for heavy oil

The synthetic process condition of the emulsifier for heavy oil,polyethylene glycol 400 dioleate ester,was investigated through the orthogonal experiment.The determined optimum reaction condition was as follows: reaction system absolute pressure 0.07MPa,the molar ratio of oleic acid to polyethelene glycol 3.0,reaction time 8h,the mass fraction of catalyst toluene-p-sulfonic acid 1.5%.The evaluation results showed that the purified emulsifier synthesized under the above condition had good emulsification performance,its hydrophile-lipophile balance(HLB)value was 6.1,the stable time of emulsification was 6.23min;The mixture of the purified emulsifier with sorbitan monooleate Span-80 presented an excellent emulsification efficiency for heavy oil,which could meet the requirement of middle microemulsion globulet index.