乙二醇是我国年进口量高达800余万吨的化工原料，广泛用于各种化工产业，如聚酯、涂料和炸药工业等．乙二醇中含化学性质较为活泼的次甲基（CH）的微量杂质，不但影响其运输、储存，而且严重影响其品质．常规的研究方法难以快速确定这些杂质组分．本文利用高灵敏度高分辨率核磁共振（NMR）技术，通过抑制主成分信号的方法，以及利用特征官能团表现出特定峰型的特点，对不同工艺条件下，煤制聚合级乙二醇（含量不低于99.8%）中的微量杂质1，2-丁二醇进行了快速鉴定，并在利用半谱峰积分方法避免信号重叠影响的基础上，测定了其含量．
俞刚金
,
周志明
,
吕明
,
钱胜涛
,
孔渝华
,
张许
,
毛诗珍
,
刘买利
. 煤基乙二醇中杂质1,2-丁二醇的NMR定性定量分析[J]. 波谱学杂志, 2019
, 36(1)
: 55
-64
.
DOI: 10.11938/cjmr20182621
Ethylene glycol is a raw chemical material for production of polyester fibers used in coating material, dynamite and etc. The presence of trace methyne (CH) containing impurities greatly affects the quality, transportation and storage of ethylene glycol. So far it is difficult to analyze these trace impurities quickly with the traditional methods. Hereby, we demonstrated a simple procedure to analyze the key impurity (1, 2-butanediol) in polymer grade coal-based ethylene glycol by the nuclear magnetic resonance (NMR) multiple signal suppression technique combined with peak shape analysis.
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