聚乙烯基溴代咪唑离子液体的制备及其油品脱硫性能

Preparation of polyvinyl bromoimidazole ionic liquids and desulfurization performance for oil products

为了获得一种易于分离回收的高效油品脱硫剂,对乙烯基溴代咪唑离子液体进行聚合得到聚乙烯基溴代咪唑离子液体。通过实验研究了该离子液体对溶剂油中二苯并噻吩(DBT)的脱除率,并利用单因素实验研究了脱硫工艺条件对脱硫效果的影响。结果表明,聚乙烯基溴代咪唑离子液体对溶剂油中的DBT有较好的脱除效果,在20℃、P([VDIM]Br)质量浓度为0.3 g/mL、萃取时间为15 min的条件下,其脱硫率达到78%左右。通过响应面法对单因素脱硫工艺条件进行优化,得到最优脱硫条件为:脱硫温度为26℃、脱硫时间为17 min、P([VDIM]Br)质量浓度为0.34 g/mL,此条件下DBT的脱硫率为80.26%。

In order to obtain an efficient desulfurizer for oil products, which is easy to separate and recover, polyvinyl bromoimidazole ionic liquids are prepared through polymerizing vinyl bromoimidazole ionic liquids.The removal rate of dibenzothiophene(DBT) in solvent oil by the ionic liquids is studied, and the effect of desulfurization process conditions on the desulfurization effect is explored through single factor method.Experimental results show that polyvinyl bromoimidazole ionic liquids have a good effect on the removal of DBT in solvent oil.The desulfurization rate can reach about 78% under the conditions that the temperature is at 20℃,P([VDIM]Br) dosage is 0.3 g·mL;,and extraction time is 15 min.The single-factor desulfurization process conditions are optimized by means of response surface method, and the optimal desulfurization conditions are obtained as follows: desulfurization temperature is at 26℃,desulfurization time is 17 min, and the dosage of P([VDIM]Br) is 0.34 g·mL;.Under the optimal desulfurization conditions, the desulfurization rate of DBT is 80.26%.