CO2/N2开关微乳液及其油污洗涤和分离性能

doi:10.13218/j.cnki.csdc.2016.06.006

摘要/Abstract

摘要： 采用等摩尔的十二烷基苯磺酸钠与N-十二烷基-N,N-二甲基叔胺为主乳化剂,正丁醇为助乳化剂,正庚烷为油相,制得O/W型微乳液。在CO₂/N₂交替作用下,可实现微乳液-相分离-微乳液的可逆转换;原始微乳液与复原微乳液半径分别为(10.89±0.21)和(11.50±0.47) nm。该微乳液对多孔固体和织物表面烃类矿物油的洗油率分别为99.13%±0.32%和98.30%±0.28%,对油砂表面原油的洗油率为54.52%±0.25%。活性物质量分数相等时,微乳稀释液对织物表面油性记号笔渍的去污力是市售洗衣粉的1.90倍;而微乳原液的去污力是市售洗衣粉的2.02倍。洗后含油废液通入CO₂可迅速实现油水分层,分离油相后的残余水相经阴、阳离子交换树脂和活性炭常规处理,COD和TOC分别为40.62和17.51 mg/L,符合GB 18918-2002中一级水排放标准(COD≤100 mg/L,TOC≤20 mg/L)。

关键词: 微乳液, CO₂/N₂开关响应, 油污洗涤, 分离

Abstract: To obtain an O/W microemulsion,blend of sodium dodecyl benzene sulfonate and N,N-dimethyl-N-dodecyl tert-amine with equimolar ratio was used as main emulsifier,butanol as co-emulsifier and n-heptane as oil phase.The reversible conversion of microemulsion-phase separated liquid-microemulsion can be realized by alternate action of CO₂ and N₂.The radii of the original and recovered microemulsion are (10.89±0.21) and (11.50±0.47) nm respectively.The oil removal rate for mineral oil on porous solid,textiles and industrial crude oil sand are 99.13%±0.32%,98.30%±0.28% and 54.52%±0.25% respectively.On an equal mass fraction basis,the removal rate of soil made by mark pen of the diluted microemulsion to that of laundry powder from market achieves 1.90 while that of the microemulsion without dilution achieves 2.02.The phase separation of oil containing waste liquid could be quickly and completely realized by bubbling of CO₂.After separating the oil phase,the water phase left was treated with anion and cation exchange resins and activated carbon.The values of chemical oxygen demand (COD) and total organic carbon (TOC) of the waste water drop to 40.62 and 17.51 mg/L respectively,which are in conformity with the first class standard of discharged water (COD≤100 mg/L,TOC≤20 mg/L) according to GB 18918-2002.

Key words: microemulsion, CO₂/N₂ switchable response, oil dirt washing, separation

中图分类号:

TQ423.92

黄曼,李灿琪,刘雪锋. CO₂/N₂开关微乳液及其油污洗涤和分离性能[J]. 日用化学工业, 2016, 46(6): 328-333.

HUANG Man,LI Can-qi,LIU Xue-feng. CO₂/N₂-switchable microemulsion as well as its oil dirt washing and separation performance[J]. China Surfactant Detergent & Cosmetics, 2016, 46(6): 328-333.

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CO₂/N₂开关微乳液及其油污洗涤和分离性能

CO₂/N₂-switchable microemulsion as well as its oil dirt washing and separation performance

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