FIELD: chemistry.
SUBSTANCE: present invention provides a carbonylation catalyst for synthesis of oxalate from carbon monoxide (CO) and nitrite in gaseous phase, comprising: (a) an active component containing palladium particles (Pd) in amount of 0.01 to 1.00 wt%, wherein Pd particles have a degree of dispersion of 20 to 50 % and an average particle size of 2.5 to 4.0 nm; (b) an auxiliary in amount of 0.01 to 12 wt%, wherein the auxiliary element is an alkali metal or an alkali-earth metal; from 0.01 to 11 wt%, wherein the auxiliary element is selected from a group consisting of IIB, IVB, VB, VIIB, VIII, IIIA and IVA; or from 0.01 to 10 wt%, wherein auxiliary element is lanthanide; (c) a support containing aluminum oxide and in which at least 90 wt% of aluminum oxide is in form of alpha-aluminum oxide, and in which the ratio of bridge adsorption of CO to linear adsorption of CO on the catalyst ranges from 1.8 to 4.3. Also disclosed is a method of producing said catalyst and a method for use thereof in synthesis of oxalate in a reaction taking place in a gas phase between carbon monoxide (CO) and methyl nitrite (MN).
EFFECT: technical result is higher efficiency of catalyst and output of oxalate.
16 cl, 2 tbl
