吗啉衍生物抑制CO_2腐蚀性能的研究

用静态失重法研究了吗啉衍生物及其复配物对CO2腐蚀的缓蚀效果。试验表明,该吗啉衍生物与咪唑啉衍生物、硫脲及丙炔醇复配后对抑制CO2的腐蚀有良好的效果,气相中的缓蚀效率可达93.6%,液相中的缓蚀效率为96.9%。     

吗啉衍生物的合成研究

本文对吗啉省生物的合成进行了研究，重点研究了以吗啉、甲醛和甲酸为原料，制备N-甲基吗啉的合成工艺，其收率达到92％，并对N-甲基氧化吗啉的合成方法进行了探索。对于治疗抑郁症的药物吗氯贝胺及其中间体N-(2-胺乙基)吗啉的合成进行了研究。     

吗啉及其衍生物的应用进展

介绍了吗啉的物化性质和应用领域,并以N-甲基吗啉、N-甲酰吗啉、N-甲基氧化吗啉、N-丙烯酰吗啉作为不同结构类型的吗啉衍生物代表,综述了这几种吗啉衍生物的应用开发进展。     

吗啉类缓蚀剂的合成及其应用研究

以吗啉、二正丁胺、三聚甲醛等为原料合成了一种新型的吗啉衍生物,并将该吗啉衍生物与其它物质进行复配,并用静态失重法,研究了吗啉衍生物及其复配物对CO2腐蚀的缓蚀效果试验表明,该吗啉衍生物与咪唑啉衍生物、硫脲及丙炔醇复配后对抑制CO2的腐蚀有良好的效果,气相中的缓蚀效率可达93.6%,液相中的缓蚀效率为96.9%.     

吗啉芳酸衍生物的合成

目的：合成吗啉芳酸衍生物并优化其合成工艺。方法：以芳酸酯为起始原料,经Williamson醚化、亲核取代反应和水解反应合成目标化合物。结果：所合成的目标化合物未见文献报道,其结构经IR1、H-NMR1、3C-NMR及MS得到确证。结论：所设计的合成技术简单易行,适合工业化生产。     

吗啉类衍生物的合成与HIV-1蛋白酶抑制活性的研究

为探索有效的抗HIV-1活性化合物,通过开环反应、磺酰基取代反应、还原反应、氧化反应、脱Boc保护基反应、甲氨基取代反应、酰胺缩合反应等步骤设计合成7个吗啉类目标化合物,并经¹HNMR、¹³CNMR和HR-MS进行结构确证。利用荧光共振能量转移方法进行体外HIV-1蛋白酶抑制活性评价,该类化合物显示出一定的HIV-1蛋白酶抑制活性。其中化合物（R）-N-(（2S,3R）-3-羟基-4-(（4-羟基-N-异丁基苯基）磺酰胺基)-1-苯基丁烷-2-基)吗啉-3-甲酰胺的IC₅₀为30.23 nmol/L,同时分子对接结果揭示了该化合物与HIV-1蛋白酶可能的结合模式,为该类化合物的进一步优化改造提供了依据。     

含三嗪结构吗啉衍生物的合成与表征

文章以三聚氯氰、脂肪胺、二乙醇胺、氯磺酸为原料,分三步合成了含有三嗪结构的吗啉衍生物,所得产物纯度好,收率高。并用FT-IR(傅立叶红外光谱仪)、ESI-MS(质谱)对产物结构进行了表征,证实所合成的产物结构正确。     

使用N-甲酰吗啉和聚乙二醇二甲醚溶剂分离H2S和CO2流程模拟比较

研究了N-甲酰吗啉作为高浓度酸性气体处理溶剂的可行性。使用PC-SAFT方程拟合了酸性气体CO₂和H₂S在N-甲酰吗啉物理溶剂中溶解的参数,并与聚乙二醇二甲醚溶剂进行了比较。在此基础上,利用通用化工流程模拟软件,设计使用上述两种溶剂提浓高分离酸性气体中的H₂S并简单比较了两种溶剂工艺的主要操作能耗。在流程模拟的结果上来看,相对而言,N-甲酰吗啉在高酸气分离中应用有一定的优势,具有工业应用价值。     

吗啉的应用及生产科研概况

介绍了吗啉的用途，生产方法及国内外生产,科研情况。     

吗啉的应用及生产科研概况

吗啉(morpholine,C_4H_9NO)又称吗啡啉、1,4-氧氮杂环环已烷,常温下为无色液体,具有吸湿性和特殊的胺味,能以任何比例与水互溶,易溶于芳烃、醇类、酮类、醚类和有机溶剂中,稍溶于矿物油和脂肪族烃中,有轻微毒性。 一、吗啉的应用 吗啉带有仲胺基团,具有仲胺基团的所有典型反应特征。与无机酸反应生成盐,与有机酸反应生成盐或酰胺。可进行烷基化反应,还可以与环氧乙烷、酮反应或进行Willgerodt反应。由于吗啉所具有的化学性     

油气开发中CO_2腐蚀及其缓蚀剂的选用

介绍了CO2 的腐蚀机理及其影响因素、我国CO2 缓蚀剂近期的研究状况以及选用原则 ,并提出了研究CO2 腐蚀及其缓蚀剂应注意的几个问题。     

Electrochemical study of 2-mercaptoimidazole as a novel corrosion inhibitor for steels

From electrochemical methods, polarization resistance and electrochemical impedance spectroscopy, the corrosion susceptibility of pipeline steel samples immersed in 1 M H₂SO₄ was determined using nil and different concentrations of the molecule 2-mercaptoimidazole (2MI). It was found that a corrosion inhibiting efficiency, IE, value of 98.5% was reached when the 2MI concentration in the system increased to 25 ppm. Moreover, at this concentration, the 2MI IE was measured as a function of time finding that the IE kinetics follows the relationship: %IE = 98.5 − 0.03t after 800 h of evaluation. During the first 200 h 2MI IE was higher that 90% then, it decreased to 70% and it remained constant up to 1200 h. It is shown that this compound can affect both the anodic and cathodic processes, thus it can be classified as a mixed-type inhibitor however, from variation of both corrosion potential and polarization resistance with [2MI] it was possible to state that the anodic reaction rate, of the corrosion process, decreases at a greater proportion than the cathodic one. 2MI follows an adsorption mechanism, which can be adequately described by the Langmuir isotherm with an adsorption standard free energy difference (ΔG°_ads) of −26.8 kJ mol⁻¹. In order to analyze the influence of substituting groups, both electron-donating and electron-attracting and the number of π-electrons on the corrosion inhibiting properties of organic molecules, an electrochemical study was carried out on four different molecules having similar chemical framework structure: 2-mercaptoimidazole (2MI), 2-mercaptobenzoimidazole (2MBI) 2-mercapto-5-methylbenzimidazole (2M5MBI) and 2-mercapto-5-nitrobenzimidazole (2M5NBI). It was found that the IE order followed by the molecules tested was 2MI > 2MBI > 2M5MBI > 2M5NBI. Thus 2MI turned out to be the best inhibitor, even superior to the 2MBI. This fact strongly suggests that, contrary to a hitherto generally suggested notion, an efficient corrosion inhibiting molecule does not require to be a large one, also bearing an extensive number of π-electrons.     

Newly synthesized pyrimidine compound as CO2 corrosion inhibitor for steel in highly aggressive simulated oilfield brine

A newly synthesized pyrimidine–based compound, 5-(4-hydroxy-3-methoxyphenyl)-2,7-dithioxo-2,3,5,6,7,8-hexahydropyrimido[4,5-d]pyrimidin-4(1H)-one (PP), was evaluated as a promising inhibitor for the CO₂ corrosion of API X60 steel in NACE 1D196 brine solution. Under rotation speed of 1000?rpm, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) were complemented with scanning electron microscopy (SEM), X-ray diffraction (XRD) and Attenuated total reflectance infrared (ATR-IR) techniques to assess the corrosion inhibition performance. PP provided inhibition efficiency up to 90% at 20?ppm. It adsorbs on the Fe (110) phase on the steel using its heteroatoms and aromatic rings. Its adsorption greatly reduces the steel surface pitting corrosion.     

冷媒液用缓蚀剂的研制

通过复配实验筛选出一种不含NO2-的复配缓蚀剂,失重法实验表明,钢、铝、铜在含缓蚀剂的乙醇冷媒液中的腐蚀速度明显降低,当缓蚀剂浓度达到1.3%时,腐蚀速度近乎为零,有效地抑制了碳钢、紫铜和铝合金材料在冷媒液中的腐蚀,同时提高了冷媒液的沸点,改善了冷媒液的稳定性。     

一种氢氟酸缓蚀剂的缓蚀性能研究

将曼尼希碱、咪唑啉季铵盐、苯硫脲、乙醇及一定量的水混合溶解,得到氢氟酸缓蚀剂F-108,用失重法静态条件下考察了温度、加量、材质对其缓蚀性能的影响;动态条件下考察了添加300 mg/L Fe3+不同流速对其缓蚀性能的影响,并对其缓蚀机理进行探讨。结果表明,在2%的HF中,50℃,F-108添量0.30%时,20#钢的静态腐蚀速率0.32 g/(m~2·h),缓蚀率大于98.7%;动态条件下,腐蚀速率为0.84 g/(m~2·h);两者均优于电力行业标准《DL/T 523—2007》中腐蚀指标,该缓蚀剂缓蚀性能优异。     

12-Aminododecanoic acid as a corrosion inhibitor for carbon steel

The inhibiting effect of 12-aminododecanoic acid (AA) on corrosion of carbon steel (CS) was investigated in hydrochloric acid of different pH, temperatures and over a prolonged period of time, and also in some other selected corrosive solutions. It was found that AA inhibits both partial corrosion reactions, with a slightly stronger inhibition of the anodic corrosion reaction. The corrosion protection mechanism is by formation of a surface-adsorbed AA monolayer that offers a hydrophobic barrier to transport of solvated corrosive ions to the surface. A maximum inhibition efficiency of 98.8 ± 0.5% was achieved in 0.5 M HCl. The adsorption of AA onto the CS surface was described by the Langmuir adsorption isotherm. The corresponding standard Gibbs energy of adsorption was calculated to be −26 kJ mol⁻¹. Polarization modulation infrared reflection absorption spectroscopy measurements revealed that the adsorbed AA monolayer is amorphous, which is due to the high heterogeneity of the CS surface.     

离子液体对碳钢的缓蚀行为研究进展

从电化学试验行为、表面分析技术、量子化学计算等多方面综述了离子液体对碳钢的缓蚀行为,包括离子液体的电化学缓蚀机理、在碳钢表面上的吸附作用机理、腐蚀产物膜的元素构成及物种的化学组成和不同离子液体分子结构对应的前线轨道能量差与缓蚀效率的关系,并展望了离子液体缓蚀剂未来应用研究趋势。     

离子液体对碳钢的缓蚀行为研究进展

从电化学试验行为、表面分析技术、量子化学计算等多方面综述了离子液体对碳钢的缓蚀行为,包括离子液体的电化学缓蚀机理、在碳钢表面上的吸附作用机理、腐蚀产物膜的元素构成及物种的化学组成和不同离子液体分子结构对应的前线轨道能量差与缓蚀效率的关系,并展望了离子液体缓蚀剂未来应用研究趋势。