| 聚羟乙基脂肪酸甲酯分层现象浅析 |
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| 引用本文： | 吴文清,孙永强,史修启. 聚羟乙基脂肪酸甲酯分层现象浅析[J]. 理化检验(化学分册), 2011, 0(11) |
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| 作者姓名： | 吴文清 孙永强 史修启 |
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| 作者单位： | 西藏地勘局第五地质大队;中国日用化学工业研究院; |
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| 基金项目： | “十一五”国家科技支撑计划项目(2007BAE52B00) |
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| 摘 要： | 将需分析的聚羟乙基脂肪酸甲酯(MEE)样品充分混匀,并经真空抽滤后,滤液经高速离心分成两层,上层为澄清液,下层呈浑浊或固化。收集上、下两层分别用于分析,用火焰原子吸收光谱法测定了下层中由催化剂所残留的镁量。用国标GB/T 5560-2003方法测定了上、下两层中作为合成中的副产物存在的聚乙二醇(PEG)。另取一定量的下层样品经水解处理并分离后,用核磁共振氢谱法测定其中副产物二酯的含量。结果表明:MEE下层样品中镁的残留量达0.421mg.g-1,下层样品中聚乙二醇质量分数为3.68%;下层中二酯(测定时预先除去样品中的PEG)及具有较高的环氧乙烷加合数的MEE的物质的量分数依次为16%和84%。据此认为上、下两层中组分及含量的不同是导致产生分层现象的原因。
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| 关 键 词： | 分层现象 聚羟乙基脂肪酸甲酯 火焰原子吸收光谱法 核磁共振氢谱法 二酯 组分 |
Elementary Analysis on the Phenomenon of Layer Separation of Methyl Ester of Poly-ethoxyl Fatty Acid |
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| WU Wen-qing,SUN Yong-qiang,SHI Xiu-qi. Elementary Analysis on the Phenomenon of Layer Separation of Methyl Ester of Poly-ethoxyl Fatty Acid[J]. Physical Testing and Chemical Analysis Part B:Chemical Analgsis, 2011, 0(11) |
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| Authors: | WU Wen-qing SUN Yong-qiang SHI Xiu-qi |
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| Affiliation: | WU Wen-qing1,SUN Yong-qiang2,SHI Xiu-qi2 |
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| Abstract: | The thoroughly mixed sample of methyl ester of poly-ethoxyl fatty acid(abbreviated as MEE) was filtered by suction and centrifuged at high speed to separated into 2 layers,giving a clear supernatant upper layer and a turbid or solidified lower layer.The 2 layers were separated and collected for analytical study.Magnesium as a residual element from the catalyst was determined by FAAS.Polyethylene glycol(PEG) in both layers as a by-product in the synthesis of MEE was determined by the method of GB/T 5560-2003... |
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| Keywords: | Layer separation phenomenon Methy ester of poly-ethoyl fatty acid FAAS 1H NMR Diester Composition |
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