Novel production process of metal alkoxide by using solvent extraction technique

1990 ~ 1993年进行了溶剂萃取法生产金属醇盐新工艺的基础研究。该工艺采用特定的萃取剂从氯化物水溶液中选择性地萃取目标金属的氯络合物，并通过低压蒸馏除去共萃取的水和氯离子，然后与乙醇和氨进行合成反应。研究结果表明：低沸点、蒸馏分离简单、高碱度、低盐酸浓度下的高萃取能力、低含水量的萃取物、与金属醇盐的弱结合力是获得最佳萃取效果的必要条件在所研究的各种萃取剂中，TOPO（三辛基氧化膦）和IPE（异丙基醚）可以有效地用作溶剂化萃取剂， ...更多信息 以TOA（三辛胺）为碱性萃取剂，对金属烷氧基化物的生产工艺提供了新的信息。萃取过程-在有机相中的高HCl浓度和高金属含量下，可降低有机相中的水含量。然而，后者比前者更有效。TOPO和TOA可以在萃取阶段萃取不含水的氯络合物。低压蒸馏过程--由于乙醇的共沸作用，IPE中的萃取水可以通过3个阶段充分去除，并可以提供给金属烷氧基化物的合成反应。合成工艺--合成反应宜在较低温度下进行。分离过程-通过形成乙氧基铁，可以分离TOPO或TOA。采用溶剂萃取技术，可以选择性地萃取目标金属的氯络合物，不含氨的氯络合物，从而实现了不同于传统方法的金属烷氧基化物的生产新工艺。用特定的萃取剂从含有多种金属离子的金属氯化物水溶液中提取水分，并在低温下与醇和氨进行合成反应。少

The fundamental study on the novel production process of metal alkoxide by solvent extraction technique which can selectively extract the chlorocomplex of the objected metal from aqueous chloride solution with specificextractant, removal of the coextracted water and chloride ion by distillation under low pressure and synthesis reaction with alcohol and ammonia was conducted from 1990 to 1993. The predominant objected metal was ferric iron because of its superior extractability.It was found from the research results that the following properties were indispensable for the optimal extractant.1) low boiling point and simple separation by distillation.2) high basicity and high extractability in the low HCl concentration.3) extracted species containing low water content.4) weak bonding strength with metal alkoxide.5) low solubility in water.Among the various investigated extractants, TOPO(Tri-octyl-phosphine oxide) and IPE(Iso-propyl-ehter) can be effectively used as solvated extractant and … More TOA(Tri-octyl-amine) as basic extractant.The new information was obtained with respect to the production process of metal alkoxyde. Extraction process - Reduction of water content in the organic phase is obtainable in high HCl concentration and high metal content in the organic phase. However, the latter is more effective than the former. TOPO and TOA can extract the chlorocomplex containing no water content in the extraction stage. Distillation process under low pressure - The sufficient removal of the extracted water in IPE is possible with 3 stages as a result of azeotropic effect of ethanol and can be offered to the synthesis reaction of metal alkoxyde. Synthesis process - Synthesis reaction in lower temperature is favarable. Separation process - The separation of TOPO or TOA is possible by the formation of Iron-ethoxyde-ammonium compound and the synthetic alkoxyde can be separated from the extractant having low boiling point by distillation under low pressure.The novel production process of metal alkoxyde different from the conventional process was found to be possible by solvent extraction technique which can selectively extract the chlorocomplex of the objected metal containing no water content from the aqueous metal chloride solution involving various metallic ions with specific extractant and synthesis reaction with alcohol and ammonia in low temperature. Less