超亲氮化碳-硅藻土复合滤层油包水乳液快速破乳  

Rapid demulsification of water in oil emulsion of supernitriphilic carbon-diatomite composite filter layer

作　　者：何赟艺 张兴杨 蒋炜[1] 王唯 李遵照[2] 王佩弦 贾旭东 赵鹏[3] HE Yunyi;ZHANG Xingyang;JIANG Wei;WANG Wei;LI Zunzhao;WANG Peixian;JIA Xudong;ZHAO Peng(School of Chemical Engineering,Sichuan University,Chengdu,Sichuan,China;SINOPEC(Dalian)Research Institute of Petroleum and Petrochemicals Co.,Ltd.,Dalian,Liaoning,China;SINOPEC Northwest China Oilfield Branch,Wulumuqi,Xinjiang,China)

机构地区：[1]四川大学化学工程学院 [2]中国石化(大连)石油化工研究院有限公司 [3]中国石油化工股份有限公司西北油田分公司

出　　处：《石油与天然气化工》2024年第1期90-97,共8页Chemical engineering of oil & gas

基　　金：国家自然科学基金“液相并流通过超润湿质构过滤层的快速乳化和破乳行为机理及其在湿法磷酸萃取工艺强化中的应用”(2178229);国家自然科学基金“尿素熔体在超润湿表面的润湿行为及其在无尘大颗粒尿素熔体造粒工艺开发中的应用”(21978181)。

摘　　要：目的实现高黏度油品油包水乳液的快速高效破乳。方法以三聚氰胺为原料,通过热聚法制备超亲水材料氮化碳,采用制备的氮化碳混合硅藻土制备复合滤饼,通过抽滤实现高黏度油包水乳液快速破乳。结果含质量分数为1.5%氮化碳的0.5 cm氮化碳-硅藻土滤饼可实现水含量在6%(w)以内,乳滴粒径在2.32μm及以上,油包水乳液完全破乳,20 kPa真空度的破乳速率可达3.57 L/min,破乳效率为97.36%,油回收率为99.72%以上;增大破乳用滤饼厚度,可用于更高含水量乳液的破乳;破乳基于超亲氮化碳对水的强吸引力和硅藻土微孔破碎共同作用。结论氮化碳-硅藻土滤饼可实现油包水乳液快速高效破乳,具工业实用前景。Objective Achieving efficient rapid demulsification of water-in-oil emulsion constructed of oil with high viscosity was realized.Methods The g-C 3N 4 was prepared from melamine by thermal polymerization method.The composite filter cake was prepared by mixing super-hydrophilic g-C 3N 4 with diatomite,and the high viscosity water-in-oil emulsion was quickly demulsified by pumping and filtering.Results The filter cake containing 1.5 wt%g-C 3N 4 with 0.5 cm thickness can realize completely demulsified,which the emulsion with water content less 6 wt%and droplet size larger than 2.32μm.The demulsification rate of 20 kPa vacuum degree can reach 3.57 L/min,the demulsification efficiency is 97.36%,and the oil recovery rate is above 99.72%.Thickening the filter cake can be used for demulsification of emulsion with higher water content.Such attractive demulsification effect is caused by the simultaneous action of strong affinity of g-C 3N 4 to water and the crushing effect by micropores of diatomite.Conclusion The g-C 3N 4/diatomite composite filter cake can be effectively used for efficient rapid demulsification of water-in-oil emulsion with promising application prospect.

关 键 词：超亲水材料氮化碳 硅藻土 高黏度油品 油包水乳液 破乳 

分 类 号：TE35[石油与天然气工程—油气田开发工程]