共查询到19条相似文献,搜索用时 93 毫秒
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以油酸、二乙烯三胺、氯化苄为原料合成了油酸咪唑啉季铵盐,采用电化学极化法测试了其对N80钢片在1mol·L-1盐酸溶液中的缓蚀性能;然后分别将KI、十二烷基苯磺酸钠(SDBS)、丙炔醇(PA)与油酸咪唑啉季铵盐进行复配,并测试了3种复配试剂对油酸咪唑啉季铵盐缓蚀率的影响。结果表明:当油酸咪唑啉季铵盐浓度达到50 mg·L-1时,N80钢片的腐蚀速率最小,缓蚀率高达92%;随着油酸咪唑啉季铵盐浓度的增大,缓蚀率趋于稳定;3种复配试剂对油酸咪唑啉季铵盐的缓蚀率都有明显改善,KI和SDBS的复配均能使缓蚀率达到95%以上,PA的复配效果最佳,缓蚀率可达到99%以上。 相似文献
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咪唑啉季铵盐缓蚀剂的合成是将油酸作为原料,利用咪唑啉季铵盐的中间体转化为咪唑啉季铵盐的水溶性液体。一般来说,可以用亚磷酸二甲酯作为中间体,加入催化剂做出水溶性的季铵盐缓蚀液。经过试验与配比,发现合成咪唑啉季铵盐,最佳的工艺温度为90℃,咪唑啉中间体和磷酸二的配比为10:8,溶剂缓蚀效率达到98.3%。 相似文献
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用摩尔比为4:1的油酸和松香作为原料酸,与二乙烯三胺合成咪唑啉中间体,并用氯化苄进行季铵化得到松香改性油酸基咪唑啉季铵盐,将其分别与十二烷基苯磺酸钠和十二烷基磷酸酯进行复配.采用静态失重法、电镜扫描分析法对复配产物的缓蚀性能进行研究.结果表明,这两种复配都具有明显的协同作用,并得出了优化的缓蚀剂配方:质量分数0.05%松香改性油酸基咪唑啉季铵盐和质量分数0.10%十二烷基苯磺酸钠复配;质量分数0.05%松香改性油酸基咪唑啉季铵盐和质量分数0.05%十二烷基磷酸酯复配. 相似文献
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Synthesis,Corrosion Inhibition Performance and Biodegradability of Novel Alkyl Hydroxyethyl Imidazoline Salts 下载免费PDF全文
Hongqin Liu Jun Hu Xiaoze Zhou Dan Liu Baocai Xu Yawen Zhou 《Journal of surfactants and detergents》2015,18(6):1025-1031
New alkyl hydroxyethyl imidazoline salts were synthesized via a high pressure process with imidazoline and dimethyl carbonate, and their chemical structure were confirmed using mass spectral fragmentation and FTIR spectroscopic analysis. In addition, several quaternary ammonium salts with new counterions (formic acid, acetic acid and lactic acid) were also synthesized by ion exchange reaction of methyl carbonate quaternary ammoniums with the corresponding acids. These new compounds reduced the surface tension of water to a minimum value of approximately 27 mN m?1 at a concentration of 8.72 × 10?5 mol L?1. They also show efficient corrosion inhibition performances and could significantly inhibit the corrosion of mild steel in acid solutions. It was also found that the biological degradation of these imidazoline surfactants was greater than 98 % after 7 days. 相似文献
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以二聚油酸和二乙烯三胺为原料,氯乙酸为反应介质,经酰胺化、环化和季铵化反应合成了新型咪唑啉。通过正交实验研究,确定最优合成条件为:n(二乙烯三胺)∶n(二聚油酸)=1∶2.1;酰胺化时间3.5 h,季铵化时间3 h。通过红外光谱分析表明,产物为咪唑啉季铵盐,经测定其季铵盐质量分数为理论值的80%左右;通过ρ(C l-)=157 305 mg/L、CO2分压为3.5 MPa、在120℃和20 MPa条件下的油田模拟工况实验,证明该咪唑啉季铵盐对N80套管钢缓蚀率在85%以上,符合西部油田苛刻的腐蚀环境要求。 相似文献
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合成了硫脲基松香咪唑啉季铵盐,对其结构进行了红外和核磁表征。采用失重法、动电位极化曲线、交流阻抗以及接触角测试分析了目标产物在质量分数为15%HCl溶液中对A3碳钢的缓蚀性能。采用AFM以及XPS测试对产物的吸附膜进行了表征。结果表明:目标产物的缓蚀效率随添加质量分数的增加先增大后减小,当目标产物质量分数增加到占盐酸质量的0.4%时,缓蚀效率最高达到90.78%;此物质是一种阴极控制为主的混合型缓蚀剂;AFM以及XPS结果证实目标产物确实可以在碳钢表面形成缓蚀剂吸附膜。 相似文献
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以油酸和二乙烯三胺为主要原料,二甲苯为携水剂,合成了油酸咪唑啉中间体。通过正交实验,考察了原料配比、酰胺化时间、酰胺化温度以及环化温度对合成产物缓蚀性能的影响。确定最佳的反应合成条件为:油酸与二乙烯三胺的摩尔比为1∶1.2,酰胺化温度为160℃,酰胺化时间为3 h,环化温度为220℃,环化时间为4 h。合成的油酸咪唑啉缓蚀率达到86.64%。 相似文献
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咪唑啉缓蚀剂合成工艺优化及吸附性能 总被引:1,自引:0,他引:1
以油酸、二乙烯三胺为原料,氧化钙为脱水剂,氯化苄为季铵化试剂,经酰胺化-环化、季铵化合成了新型咪唑啉季铵盐缓蚀剂,并对其吸附过程进行了研究.响应面法优化了油酸与二乙烯三胺摩尔比、环化时间和环化温度等合成关键工艺条件,采用红外光谱和可见光吸收光谱法分析产品结构,以动电位扫描极化曲线法评价缓蚀效果.以0.05mol油酸为基准,氧化钙0.10mol,氯化苄0.06mol,季铵化时间2.5h,季铵化温度55℃条件下,优化结果为:n(油酸):n(二乙烯三胺)为1:1.18,环化温度162.8℃,环化时间5.55h;在50℃缓蚀剂浓度200mg/L、15%盐酸溶液中缓蚀率可达94%;该缓蚀剂的吸附行为符合Langmuir 吸附等温式,为自发放热过程,50℃下吸附平衡常数为1.0277′105L/mol,吉布斯自由能为-41.75kJ/mol,吸附热能为-54.07kJ/mol,熵值为-38.11J/(K·mol),属于以化学吸附为主的过程.与同类合成工艺相比较,环化温度明显降低,产物具有优异的缓蚀性能. 相似文献
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利用静态失重法、Tafel极化曲线研究了油酸咪唑啉类缓蚀剂在不同酸介质中对不锈钢的缓蚀性能,并尝试了油酸咪唑啉缓蚀剂与KI的复配实验。结果表明,油酸咪唑啉类缓蚀剂在10%盐酸中和10%硫酸中对不锈钢有很好的缓蚀作用。在10%盐酸介质中,只需加入0.3%的油酸咪唑啉缓蚀剂,不锈钢材质的缓蚀率就能达到98%;在10%硫酸介质中,缓蚀率在油酸咪唑啉缓蚀剂添加量为0.5%时最大,达到94%。与KI的复配结果表明,咪唑啉与KI之间有一定的缓蚀协同效应,复合使用可以达到降低成本和保持高缓蚀率的作用。 相似文献
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Kiran Kousar Thomas Ljungdahl Alexander Wetzel Michael Dowhyj Hans Oskarsson Alex S. Walton Monika S. Walczak Robert Lindsay 《Journal of surfactants and detergents》2020,23(1):225-234
An optimized one-pot recipe has been developed to synthesize a surfactant molecule, referred to as OMID, consisting of an imidazoline head group and aliphatic tail, which is an exemplar corrosion inhibitor for carbon steel in acidic solutions. As evidenced by gas chromatography, 1H and 13C nuclear magnetic resonance, and Fourier-transform infrared data, a high-purity product was achieved without the use of either a solvent or catalyst. Critical micelle concentration values and corrosion inhibition efficiencies ( η %) were determined in aqueous solutions of hydrochloric acid and sulfuric acid using surface tensiometry and linear polarization resistance measurements, respectively. Hydrolysis of the imidazoline head group as a function of pH (0–11) was explored with ultraviolet–visible absorption spectroscopy. In addition, N 1s and C 1s X-ray photoelectron spectroscopy data were acquired from both surface-adsorbed OMID and a multilayer of the imidazoline head group of OMID. These latter data are highly relevant to those attempting to understand OMID inhibition chemistry. 相似文献