摘要
依次用石油醚和三氯甲烷萃取含油3320 mg/L、含聚合物225 mg/L、含悬浮固体336 mg/L的胜利孤岛孤二联聚驱采油污水中的油分;将石油醚萃取物分离为甲醇/异丙醇可溶亚组分SF1和二氯甲烷可溶亚组分SF2;将三氯甲烷萃取物再用石油醚萃取,其萃取物被分离为甲醇/异丙醇可溶亚组分SF31和二氯甲烷可溶亚组分SF32,萃余物被分离为二氯甲烷/石油醚可溶亚组分SF41和不溶亚组分SF42。对所得6个亚组分作了元素分析、红外光谱分析、酸值和碱氨值测定,考察了各亚组分的苯/庚烷溶液与蒸馏水之间的界面张力及形成的乳状液的稳定性。固体亚组分SF41和SF42的杂原子含量高,H/C比值低,低浓度下(<0.5 g/L)界面活性强,乳化能力强;液体亚组分SF1和SF31酸值高(SF31的酸值高达23.9 mg KOH/g),富含石油酸,界面活性和乳化能力均较强;黏稠液体亚组分SF32和SF2酸值较低,界面活性和乳化能力均较弱。各亚组分按界面张力由小到大排序为:SF42≤SF41<SF31≈SF1<SF32≈SF2。图4表2参6。
The oily substances （OSs） in the produced water from a polymer flooded reservoir of Gudao, Shengli, containing 3320 mg/L OSs,225 rng/L polymer,and 336 mg/L suspended solids were extracted by petroleum ether （PEth） and trichloroethane （TCE） successively. The PEth fraction of OSs was separated into 2 subfractious： soluble in CH3OH/i-C3H7OH, SF1, and in dichloroethane （DCE） ,SF2. The TCE fraction was extracted again by PEth and the extract was separated into CH3OH/i-C3H7OH soluble subfraction SF31 and DCE soluble subfraction SF32 and the raffinate-into 2 subfractious： DCE/PEth soluble one, SF41, and insoluble one, SF42. The 6 subfractions obtained were characterized by elemental and IR spectral analyses and acid value and alkaline amine content determinations; the interracial tension between benzene/heptane solution of subfrcactious and distilled water and the stability of their emulsions formed are investigated. High heteroatom content, low H/C ratio, strong interracial activity at low concentrations 40.5 g/L, and strong emulsifying capacity are observed for solid subfractions SF41 and SF42 ; high acid value （23.9 mg KOH/g for SF31 ） and relatively strong intertracial activity and emulsifying capacity for liquid subfractious SF31 and SF1, rich in petroleum acids as shown by IR data; low acid value, interracial tension and emulsifying capacity for subfractions SF32 and SF2 ,being viscous liquid. The interfacial tension for these subfractions is arranged as follows： SF42≤SF41〈SF31≈SF1〈SF32≈SF2.
出处
《油田化学》
CAS
CSCD
北大核心
2007年第1期53-56,47,共5页
Oilfield Chemistry
基金
中国石油化工股份有限公司科学技术开发项目"特高含水期采出液油水分离机理及新方法研究"(项目编号P05022)
关键词
采油污水
油分
组分
分离
油水界面张力
乳化性能
胜利孤岛油田
oily produced water
oily substances
fractions
separation
oil/water interfacial tension
emulsifying ability
Gudao oil field in Shengli
