Synthesis of stable solutions of rare earth tris (organophosphate) in hydrocarbon solvents
申请人:——
公开号:US20040192950A1
公开(公告)日:2004-09-30
Stable rare earth tris (organophosphate) solutions comprise a rare earth tris (organophosphate) and a hydrocarbon solvent. From about 2% to about 10% rare earth element, preferably from about 3% to about 8%, is present in the solutions. The rare earth tris (organophosphate) solutions are stable from precipitation of the rare earth tris (organophosphate) for at least about fifteen (15) days, preferably for at least about twenty (20) days and most preferably at least about thirty (30) days. A process for preparing these solutions is described herein. A stabilizing additive, acid, glycol or mixtures thereof, is utilized to inhibit precipitation. The molar ratios of free acid, glycol and/or water to the rare earth element are controlled to inhibit precipitation.
稳定的稀土三(有机磷酸酯)溶液由稀土三(有机磷酸酯)和烃类溶剂组成。溶液中含有约 2%至约 10%的稀土元素,最好是约 3%至约 8%。稀土三(有机磷酸酯)溶液从稀土三(有机磷酸酯)沉淀开始至少稳定约十五(15)天,最好至少稳定约二十(20)天,最理想至少稳定约三十(30)天。本文介绍了制备这些溶液的工艺。利用稳定添加剂、酸、乙二醇或其混合物来抑制沉淀。控制游离酸、乙二醇和/或水与稀土元素的摩尔比,以抑制沉淀。