Major products and by-products of the ethoxylation of diethylethanolamine and its solutions in methanol have been identified. Through gas chromatography and mass spectrometry, it has been found that by-products correspond to ethyldiethanolamine and its succeeding ethoxylates. In methanol ethoxylation, diethylethanolamine acts as a catalyst and also itself undergoes ethoxylation, forming two types of products.
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