| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: phosphoric and/or hypophosphorus acid and a basic compound are added to triethanolamine, where the basic compound is selected from a hydroxide of alkali metals, a hydroxide of alkali-earth metals and [R1R2R3(2-hydroxyethyl)ammonium]hydroxide, where R1, R2 and R3 independently denote an alkyl having 1-30 carbon atoms, or hydroxyalkyl having 2-10 carbon atoms. If a hydroxide of alkali metals is used as the basic compound, molar ratio of acid (acids): hydroxide ranges from 1:0.1 to 1:1, and if hydroxide of alkali-earth metals is used as the basic compound, molar ratio of acid (acids): hydroxide ranges from 1:0.05 to 1:0.5. Phosphoric and/or hypophosphorus acid and the basic compound are added before and/or during distillation of triethanolamine. The invention also relates to triethanolamine containing 0.01-2 wt % (in terms of pure triethanolamine) phosphoric and/or hypophosphorus acid and the corresponding hydroxide. ^ EFFECT: stability of improved chromaticity of triethanolamine during storage and increased output during distillation of the triethanolamine. ^ 15 cl, 2 tbl |
