Aluminum monoethyl-phosphite, useful for the protection of plants against fungal diseases, is manufactured in a continuous manner by first preparing a mixture of phosphite compounds, containing at least 70 mol % of diethyl phosphite, then saponifying and neutralizing such mixture with an inorganic base, at a temperature of 20.degree.-85.degree. C., at a pH of 4.0-8.5, and finally reacting the residual aqueous solution of alkaline metal monoethyl-phosphite, continuously withdrawn from the preceding operation, with an approximately stoichiometric amount of a water-soluble aluminum salt at 70.degree.-95.degree. C. and a pH of 3.0-4.5.
铝单乙基
亚磷酸盐可用于保护植物免受真菌病的侵害,其连续生产方法包括:首先制备含有至少70摩尔%
二乙基亚磷酸酯的
亚磷酸化合物混合物,然后在pH值为4.0-8.5,温度为20℃-85℃的条件下,用
无机碱液皂化和中和该混合物,最后将从前一步操作中连续提取的残余
水溶性碱
金属单乙基
亚磷酸盐与约
化学计量量的
水溶性铝盐在70℃-95℃,pH值为3.0-4.5的条件下反应。