Vapour–liquid equilibrium of CO2 in aqueous solutions of N‐methyl‐2‐ethanolamine

The equilibrium solubility of CO₂ into aqueous solution of sterically hindered N‐methyl‐2‐ethanolamine or methyl amino ethanol (MAE) was investigated in the temperature range of 303.1–323.1 K and total CO₂ pressure in the range of 1–350 kPa. The N‐methyl‐2‐ethanolamine aqueous solutions studied were 0.968, 1.574, 2.240 and 3.125 mol kg^?1 of solvent. © 2011 Canadian Society for Chemical Engineering     

Rapid synthesis of (E)-5-amino-N′-benzylidene-8-nitro-7-aryl-3,7-dihydro-2H-thiazolo[3,2-a]pyridine-6-carbohydrazide derivatives

A variety of novel thiazolo/oxazolo pyridine derivatives were synthesized via an efficient, one-pot, multi-component reaction of enamines derived from the addition of cysteamine hydrochloride/ethanolamine to 1,1-bis(methylthio)-2-nitroethene with aromatic aldehydes and cyanoacetohydrazide in the presence of catalytic amount of Et₃N. This reaction includes some important aspects like simple operation under mild conditions, high atom economy, easy accessibility of reactants, simple workup procedure, and the use of EtOH/H₂O as a green reaction medium.     

切削液防锈剂的研究

以硼酸酯、取代苯甲酸乙醇胺盐、葡萄糖酸钠三者为混合防锈剂应用于切削液中，其中硼酸酯和取代苯甲酸乙醇胺盐有明显的协同效应。实际配方中硼酸酯、取代苯甲酸乙醇胺盐、葡萄糖酸钠的含量分别为10％、6％和1％。所得切削液有较好的防锈性能，使用寿命长，适合于多种金属材料的多种加工工艺。     

Optimization by full factorial design of the emulsifying properties of ethanol insoluble fraction from rapeseed lecithin

Rapeseed lecithin ethanol insoluble fraction (LEIF), was acetylated and optimum conditions for improving LEIF emulsifying property were determined. The effects of reaction time, pyridine amount and temperature on phosphatidyl ethanolamine conversion degree (PECD) and emulsion stability index (ESI) have been described in the form of regression equations. A full factorial design method was used. Regression equations for the maximum value of response functions and computation results were calculated and compared with those obtained in control experiments. Acetylation of rapeseed LEIF with the use of calculated optimal parameters led to 35% and 60% increments in PECD and ESI, respectively.     

Antioxidant activity and active sites of phospholipids as antioxidants

Various compounds, representative of the major functional groups in phospholipids, phosphatidylethanolamine and phosphatidylcholine, were tested for antioxidant activity (AA) in a sardine oil system to determine the relationship between molecular structure and the AA of these compounds. AA was found to be attributable not only to the side-chain amino groups but also to the cooperative effect of the hydroxy group in the side chain. Choline and ethanolamine, side-chain moieties of phospholipids, strongly inhibited increases in peroxide values in a sardine oil mixture during storage; however, phosphatidic acid derivatives and glycerol, also major functional groups of phospholipids, did not show AA. Choline and ethanolamine have hydroxy amines as functional groups; therefore, several model reagents that contained amines and alcohols were assayed to compare the activity of the amino group with that of the hydroxy group. All basic alkylamines examined had AA as decomposers of hydroperoxides. The intramolecular hydroxy group in these amines complemented AA of the amino group. Only intramolecular alcohol, which can donate a proton, showed strong synergistic activity with AAof the basic amines, while protected groups, such as methyl ether and phosphate ester, did not show this effect.     

双氧威的合成研究

以乙醇胺和对苯氧基苯酚为主要原料催化合成双氧威,重点考察了氯化亚砜、氯甲酸乙酯与乙醇胺的配比,以及催化剂的用量对反应的影响,得出了合成双氧威的优惠条件;中间体2 氯乙基氨基甲酸乙酯合成收率达78%(以乙醇胺计),产品双氧威合成收率达86%(以对苯氧基苯酚计),产品纯度≥95%。     

乙醇胺的市场及生产工艺分析

对乙醇胺的产能和市场需求做了简要的分析,并分析了中国市场的乙醇胺产能、消费及构成、扩能展望及现状,指出了中国乙醇胺生产的不足;其次还对当今乙醇胺的生产工艺进行了介绍,着重介绍了国内与国外乙醇胺生产工艺,指出了我国乙醇胺在生产工艺落后与市场需求量大的矛盾;最后对国内乙醇胺的生产提出了个人建议。     

Transport selectivity of tribenuron‐methyl imprinted polymer nanowire membrane prepared using N,O‐bismethacryloyl ethanolamine as a functional crosslinking monomer

Using tribenuron‐methyl as a template and N,O‐bismethacryloyl ethanolamine as a functional crosslinking monomer, a molecularly imprinted nanowire membrane was prepared over an anodic alumina oxide membrane. The nanowire fabric of the imprinted membrane was established with a scanning electron microscope and a transmission electron microscope. However, the nonimprinted particulate membrane is formed in the absence of a template. Scatchard analysis showed that an equal class of binding sites were formed in the imprinted nanowire membrane and the dissociation constant and the maximum number of these binding sites were estimated to be 1.44 × 10⁻⁵ M and 22.7 µmol/g, respectively. The permeation experiments throughout the imprinted membrane and the nonimprinted one were carried out in a solution containing the template and its competitive analogs. These results demonstrated that the molecularly imprinted nanowire membrane exhibited higher transport selectivity for the template tribenuron‐methyl than its analogs, chlorimuron‐ethyl, thifensulfuron‐methyl and N‐(4‐bromophenylcarbamoyl)‐5‐chloro‐1H‐benzo[d]imidazole‐2‐carboxamide. But the nonimprinted granular membrane had no permselectivity for the four substrates. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010     

乙醇胺的生产技术

论述了乙醇胺合成的方法，介绍国外乙醇胺的先进生产技术，并结合国内乙醇胺的生产现状提出了其生产技术改造的必要性及初步设想。     

气相色谱法测定化妆品中的乙醇胺

建立一种用气相色谱法测定化妆品中单乙醇胺(MEA)、二乙醇胺(DEA)、三乙醇胺(TEA)含量的方法.在选定的实验条件下,单、二、三乙醇胺能较好的分离,加标回收率在90.9%～96.9%之间,相对标准偏差小于3%.此方法简单、精密度高、分析快速.