| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention relates to fine organic synthesis. In the method of producing lactobionic acid via liquid-phase oxidation of D-lactose with pure oxygen, at partial pressure of 1 bar on a platinum or palladium or gold catalyst, with concentration of the transition metal or Au 0.5% or Pt 5% or Pd 5% of the weight of the support and amount of catalyst of 1 g/l, at pH of the aqueous solution of lactose 8-10, while heating and stirring, the support used for the platinum, palladium and gold catalysts is ultra-crosslinked polystyrene, wherein transition metal particles are nano-dispersed in the matrix of the support, and oxidation is carried out at temperature 60-72C, with oxygen flow rate of 2.5-3 ml/min and with concentration of lactose 0.4-0.5 mol/l. The size of the transition metal particles, embedded in the matrix of the ultra-crosslinked polystyrene support, is equal to 1.40.5 nm. Conversion after 20 minutes is greater than 95% for 0.5% Au/SPS, 80% for 5% Pt/SPS and 72% for 5% Pd/SPS. ^ EFFECT: high efficiency of the method. ^ 2 cl, 3 ex, 3 tbl |
