| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: method involves addition of a phosphorus-containing compound in liquid phase to triethanolamine, where the phosphorus-containing compound is phosphane and/or a compound which releases phosphane, selected from phosphonium halide or metallophosphide which contains group IA, IIA, IIIA or IIB metals in an amount of at least 0.001 wt % while heating and subsequent separation of pure triethanolamine from the additive or additives. Phosphane usually refers to PH3, P2H4 or P4H6. Phosphide refers to lithium phosphide, sodium phosphide, potassium phosphide, magnesium phosphide, calcium phosphide, aluminium phosphide, indium phosphide and/or zinc phosphide. Triethanolamine is mixed with phosphane and/or a compound which releases phosphane in amount of 2 wt % (in terms of pure triethanolamine) before and/or during distillation of the triethanolamine. The desirable time for treatment with the additive is at least 5 minutes at temperature ranging from 40 to 250C. Triethanolamine may contain water in amount of 0.01-20 wt % (in terms of pure triethanolamine). The invention also relates to triethanolamine containing at least 0.001 (in terms of pure triethanol) of the mass of phosphane and/or a compound which releases phosphan selected from phosphonium halide or metallophosphide containing group IA, IIA, IIIA or IIB metals, which is the initial mixture for enhancing chromaticity. ^ EFFECT: enhanced chromaticity of triethanolamine. ^ 17 cl |
