一种沥青分散剂的研制及其对油浆阻垢性能的评价

采用聚异丁烯基丁二酰亚胺、咪唑和水杨醛为原料制备了一种新型沥青分散剂，考察了原料配比、反应温度和反应时间对产品阻垢性能的影响；采用傅里叶红外光谱对产品结构进行表征；采用经典失重法考察产品的缓蚀性能，对其进行热重分析，并考察了阻垢剂各组分配比对油浆阻垢性能的影响。结果表明：沥青分散剂的最佳合成条件为：n（聚异丁烯基丁二酰亚胺）：n（咪唑）：n（水杨醛）=2:2:1，反应温度140 ℃，反应时间5 h；红外光谱分析表明合成的样品为目的产物；合成的沥青分散剂具有良好的热稳定性，在200～380 ℃内未出现热失重情况；具有较好的阻垢性能，当加入量（w）为150 μg/g时，对油浆的阻垢率可达79.0 ％；并具有较好的缓蚀性能，缓蚀率为84.6%。

DEVELOPMENT AND PERFORMANCE OF ASPHALTENE INHIBITOR/ DISPERSANT

A new type of asphalt dispersant was prepared by using polyisobutylene succinimide, imidazole，and salicylaldehyde as materials and characterized by FT-IR. The effects of molar ratio of the material，reaction time and temperature on the scale inhibition performance of the product were investigated；the weight loss analysis was used to test the corrosion inhibition performance of product; and the effect of the ratio of scale inhibitor components on the asphaltene inhibition was discussed. The results show that the best synthetic conditions for asphalt dispersant are: mole ratio of 2:2:1 for polyisobutylene succinimide: imidazole: salicylaldehyd, and reaction time of 5 h at 140 ℃. IR spectrum shows that the desired product is synthesized；No thermal weight loss in 200—380 ℃ indicates the good thermal stability of the product. When 150 μg/g product was added, the asphaltene inhibition rate is up to 79.0%，and the corrosion-inhibiting rate is up to 84.6%.