| 摘要 |
Preparing fully or partially water-soluble tetraalkylbisphosphates (I) comprises: (a) reacting tetrachlorbisphosphates (II) with one or more different alcohols; (b) reacting the reaction mixture of step (a) with a base; (c) adding water to the reaction mixture of step (b); (d) adding solvent that is not completely miscible with water to the reaction mixture of step (c) to form a mixture consisting of two separate liquid phases; and (e) separating a phase containing (I) that is obtained in step (d). Preparing fully or partially water-soluble tetraalkylbisphosphates (I) comprises: (a) reacting tetrachlorbisphosphates (II) with one or more different alcohols; (b) reacting the reaction mixture of step (a) with a base containing one or more substance of formula ((Kat(n+)) a(X(m-)) b), when at least 50% of (II) containing phosphorus-chloride groups are reacted; (c) adding water to the reaction mixture of step (b); (d) adding solvent that is not completely miscible with water to the reaction mixture of step (c) to form a mixture consisting of two separate liquid phases; and (e) separating a phase containing (I) that is obtained in step (d). Kat(n+) : a cation of charge n, preferably optionally substituted ammonium ion, an alkali metal ion or alkaline earth metal ion; X(m-) : an anion of the charge m, preferably hydroxide, alkoxide, oxide, carbonate, bicarbonate, phosphate, hydrogen phosphate, dihydrogen phosphate or acetate; and a, b : numbers that satisfies the relation nx a = mx b. |
