CATALYST FOR SYNTHESIS OF 2,6-DIMETHYLANILINE AND A METHOD OF ITS PREPARING Russian patent published in 1995 - IPC

FIELD: catalytic chemistry. SUBSTANCE: method involves mixing aqueous solution of palladium hydrochloric acid (concentration is 0.025-0.5 M) with sodium carbonate aqueous solution (concentration is 0.05-1 M) at their molar ratio 1: (2-3) followed by applying prepared mixture at pH 6.5-8.5 and dispersed in the presence of CO₂ (mixture as aerosol) on the layer of moving carrier. The latter is a matrix formed by curved carbon layers at thickness , curvature radius , true density 1,8-2,1 g/cm³, roentgen density 2,11-2,24 g/сm³, pore distribution by size showing maximum at the range . Aerosol quantity applied on the carrier is 10-100% of pore volume. Then catalyst is reduced with hydrogen, washed with distilled water and dried. Palladium content in the end product must be 0.093-1 wt.-% on the carrier. Under these conditions catalyst activity is increased by 2.5 times as output at selectivity 2,6-dimethylaniline synthesis up to 93.5% EFFECT: increased activity and selectivity of catalyst. 3 cl, 1 tbl