Discrete tert-amine oxides, including non-hygroscopic tert-amine oxide dihydrates, are prepared by (A) reacting a concentrated aqueous hydrogen peroxide with a tert-amine corresponding to the formula RR'R"N in which R is a primary alkyl group containing 8-24 carbons; R' is methyl, ethyl, or 2-hydroxyethyl; and R" is independently selected from methyl, ethyl, 2-hydroxyethyl, and primary alkyl groups containing 8-24 carbons in a reaction mixture which is maintained stirrable throughout the reaction by the use, at least during the latter part of the reaction, of an organic solvent which solubilizes the reaction mixture at the reaction temperature but permits precipitation of the tert-amine oxide at a lower temperature and (B) adjusting the water content of the product, if necessary, to achieve a water/tert-amine oxide mol ratio not higher than about 2.1/1 before recovering the tert-amine oxide.
离散的三次胺氧化物,包括不吸湿的三次胺氧化物
二水合物,通过以下步骤制备:(A)将浓缩的
过氧化氢与符合RR'R"N公式的三次胺反应,其中R是含有8-24个碳的一次烷基基团;R'是甲基、乙基或2-羟乙基;R"是独立选择自甲基、乙基、2-羟乙基和含有8-24个碳的一次烷基基团的反应混合物,在整个反应过程中通过使用有机溶剂维持混合物可搅拌,至少在反应的后期使用有机溶剂,该有机溶剂在反应温度下溶解反应混合物,但允许在较低温度下沉淀三次胺氧化物;(B)如有必要,调节产品的
水含量,以实现
水/三次胺氧化物的摩尔比不超过约2.1/1,然后回收三次胺氧化物。