咪唑类离子液体对油基钻屑的处理  

Treatment of oil-based drilling cuttings with imidazolium ionic liquids

作　　者：单海霞[1] 何焕杰[1] 王中华[1] 张鑫[1] 张弌[1] SHAN Haixia HE Huanjie WANG Zhonghua ZHANG Xin ZHANG Yi(Drilling Technology Research Institute ,Zhongyuan Petroleum Exploration Bureau, Sinopec, Puyang 457001, China)

机构地区：[1]中国石油化工股份有限公司中原石油工程有限公司钻井工程技术研究院,濮阳457001

出　　处：《环境工程学报》2017年第3期1837-1841,共5页Chinese Journal of Environmental Engineering

基　　金：中国博士后科学基金资助项目(2011M501194);中国博士后科学基金特别资助项目(2012T50641);中原石油工程公司科技攻关项目(2014208)

摘　　要：合成3种结构和性质呈规律性递变的离子液体1-烷基-3,基咪唑溴化盐[C_nIm]Br(n=8、10、12),作为萃取剂替代有机溶剂用于油基钻屑的萃取处理。研究了离子液体结构对油去除率的影响规律,发现随着阳离子烷基链长的增加,油去除率提高。通过考察离子液体种类、加量、萃取时间及pH值等对萃取效果的影响,优选[C_(12)MIm]Br为最佳萃取剂,油基钻屑与萃取液质量比为1:1、PH大于7时,萃取在20 min时就可以达到平衡,油基钻屑中油去除率大于85%,离子液体吸附损失率小于1%,分离后的离子液体可直接重复利用6次。Three 1-alky-3-roethyl imidazole bromide salt ionic liquids,abbreviated as[C_nMIm]Br（n=8,10,12）,were synthesized and used to replace organic solvent as an extraction agent in the oil-based drilling cutting treatment.Analysis of the effects of the ionic liquid structure on the oil-removal rate law revealed that the oil-re—moval rate increased with the increasing cation alkyl chain length.By investigating the effects of the ionic liquid type,amount,extraction time,and pH on the extraction,the following optimized conditions were identified：[C12MIm]Br as the extraction solvent,a 1：1 mass ratio of the oil-base drilling cuttings and extracted liquid,and a pH greater than 7.Under these conditions,the extraction can achieve balance in 20 min,the oil removal rate is over 85%,and the ionic liquid adsorption loss rate is less than 1%.The separated ionic liquid can be directly reused up to six times.

关 键 词：离子液体 油基钻屑 萃取 去除率 

分 类 号：X705[环境科学与工程—环境工程]