摘要
以玉门风化油砂为研究对象,通过解离剂将沥青从砂粒剥离,利用聚结剂对水相中的沥青微滴聚结,实现了沥青、水、砂粒三相分离。考察了解离剂组成和聚结剂用量等工艺条件对风化油砂分离效果的影响。采用偏光显微镜和FTIR技术对风化油砂、尾砂及沥青试样进行了表征。实验结果表明,以Na OH、Na Cl和吐温80为解离剂,处理后尾砂的含油率低至0.2%;以聚丙烯酰胺为聚结剂,加入量为0.005 g/g时沥青收率为93.5%。提出了分离风化油砂的解离-聚结体系模型,即通过表面活性物质强化沥青乳化,通过碱剂的化学驱动力使"露头"油砂表面沥青剥离,以高分子聚结剂彻底回收分散态的风化油砂沥青。
The Yumen weathered oil sands were separated into bitumen, water and sands by means of liberating agent and flocculating agent, in which the bitumen was separated from the sands through the liberation process and then the bitumen was recovered through the flocculation process. The effects of the liberating agent composition and the flocculating agent dosage on the separation of the weathered oil sands were investigated. The results showed that, oil content in the tailing sands could be as low as 0.2% when NaOH, NaC1 and Tween 80 were used as the liberating agent, and the bitumen recovery could be up to 93.5% when 0.005 g/g polyacrylamide was used as the flocculating agent. The weathered oil sands, tailing sands and bitumen were characterized by means of digital polarizing microscope and FTIR. The mechanism for the separation of the weathered oil sands by liberation- flocculation was proposed, namely the surfactants made the weathered oil sands ＂outcrop＂ , the alkaline agent peeled off the bitumen film from the ＂outcrop＂ oil sands, and then the polymeric flocculant was used to recover the bitumen dispersed in the water.
出处
《石油化工》
CAS
CSCD
北大核心
2017年第4期461-466,共6页
Petrochemical Technology
基金
国家自然科学基金项目(21276253)
关键词
风化油砂
沥青
解离剂
聚结剂
weathered oil sands
bitumen
liberating agent
flocculating agent
