| 摘要 |
FIELD: chemistry.SUBSTANCE: invention relates to a method of producing industrially used acids of formula: (X)[N(W)(Y)], where X denotes optionally substituted C-Clinear, branched, cyclic or aromatic hydrocarbon, ZPOM, [V-N(K)]-K, [V-N(Y)]-V or [V-O]-V; where V denotes optionally substituted Clinear, branched, cyclic or aromatic hydrocarbon; Y = ZPOM, [V-N(K)]-K or [V-N(K)]-V; x = 1 to 50000; z = 0 to 200000 and ? the number of carbon atoms in X; a = 0 or 1; n = 0 to 50000; Z - Calkylene; M = H; W = H, X and ZPOM; K = ZPOMor H. The method includes adding POto an aqueous reaction medium containing a homogeneous Bronsted acid, wherein POis hydrolysed to phosphorous acid, and said aqueous medium contains an amine of formula (X)[N(W)(H)], where b = 0 or 1, and the amine is added at the same time as POor after hydrolysis of PO; water after hydrolysis from 0 to 40 wt %, pH during the entire hydrolysis period is kept below 5 with subsequent addition of formaldehyde and a homogenous Bronsted acid with pKa?3.1 and a heterogeneous Bronsted acid, with the ratios: (a) phosphorous acid, (b) amine, (c) formaldehyde and (d) Bronsted acid: (a):(b) 0.05:1 to 2:1; (c):(b) 0.05:1 to 5:1; (c):(a) 5:1 to 0,25:1; and (b):(d) 40:1 to 1:5; where (a) and (c) denote the number of moles, (b) denotes the number of moles, multiplied by the number of N-H groups in the amine, (d) denotes the number of moles, multiplied by the number of available protons per mole catalyst.EFFECT: novel efficient method of producing aminoalkylene phosphonic acids is disclosed.14 cl, 10 ex |
