摘要
以甲苯为溶剂,用金属钠和椰油醇聚氧乙烯(3)醚反应生成醇纳,再与2-氯乙基磺酸钠反应合成了椰油醇聚氧乙烯醚磺酸钠(CAPES),产率达到82%左右。产品经红外光谱和质谱表征为C12/C14醇聚氧乙烯醚(n)磺酸盐(n=1～8)。性能研究表明,CAPES在中性或微碱性水介质中于80℃下存放96 h,稳定度达到97%以上,明显高于AES;45℃下对NaCl,CaCl2,MgSO4的容忍度分别达到115,167,300 g/L以上,与AES相当;CAPES微乳液的最佳盐度(NaCl)和中相盐宽亦与AES接近,耐盐能力明显高于重烷基苯磺酸盐类表面活性剂;CAPES的表面活性与AES相当,明显高于SDS;通过与两性表面活性剂复配,无需添加任何碱和中性电解质,可使大庆原油/水界面张力降到10-3 mN/m数量级。
Polyethoxylated coconut fatty alcohol reacted with metallic sodium in benzene as reaction medium to form sodium polyethoxylated coconut fatty alcoholate,and the latter further reacted with 2-chloroethanesulfonate in toluene as solvent to form the product sodium polyethoxylated coconut fatty alcohol sulfonate（CAPES） with a yield of 82% achieved.Characterized by IR and MS,the final product was proved to be mixed homologues of sodium polyethoxylated C12/C14 alcohol sulfonates with n between 1 to 8.Examination to the properties of CAPES indicated that CAPES has a thermal stability of higher than 97% when dissolved in neutral or slightly alkaline aqueous media and set for 96 h at 80 ℃,which is conspicuously higher than that of sodium polyethoxylated alcohol sulfate（AES）.At 45 ℃,the tolerance of CAPES to NaCl,CaCl2 and MgSO4 in water reaches higher than 115,167 and 300 g/L respectively,which is equivalent to that of AES.Using CAPES as surfactant to prepare microemulsions,the optimum salinity and the salt concentration range in which middle phase microemulsions are formed are similar to that of AES.The salt tolerance of CAPES is much better than that of sodium heavy alkylbenzene sulfonates（HABS）.The interfacial activity of CAPES is similar to AES but much better than sodium dodecyl sulfate（SDS）.By blending with amphoterics,CAPES can reduce Daqing crude oil/water interfacial tension to a magnitude of 10-3 mN/m at 45 ℃ without adding any alkaline agent or neutral electrolyte.
出处
《日用化学工业》
CAS
CSCD
北大核心
2011年第2期92-96,108,共6页
China Surfactant Detergent & Cosmetics
关键词
椰油醇聚氧乙烯醚磺酸盐
合成
性能
无碱驱油剂
polyethoxylated coconut fatty alcohol sulfonates
synthesis
chemical property
alkali-free surfactant-polymer flooding
