HETEROGENEOUS CATALYST FOR OXIDATION OF PARA-XYLENE TO TEREPHTHALIC ACID Russian patent published in 2020 - IPC B82B3/00 B82Y40/00 B01J29/68 B01J29/35 C07C51/265 

FIELD: chemistry.

SUBSTANCE: invention relates to a heterogeneous catalyst for oxidation of para-xylene to terephthalic acid, consisting of a carrier containing, wt%: ordered mesoporous silicon oxide of type MSM-41 20.0–70.0; aluminosilicate nanotubes 30.0–80.0, and a metal oxide selected from a series comprising Mn, Co, Fe, Cu, Pd or a mixture thereof, supported on the support in amount of 0.5–15.0 % of the weight of the catalyst, wherein said carrier is a single structured composite material. Use: oil refining and petrochemical industries.

EFFECT: achieved technical result consists in improvement of selectivity for target terephthalic acid due to formed system of pores and channels of nanostructured composite support, which provides molecular sieve effect during oxidation due to bimodal pore size distribution; high specific surface area of the described catalyst and, as a result, an increase in the area of contact of molecules of the raw material with catalytically active centers, enables to increase conversion of para-xylene and output of target terephthalic acid.

1 cl, 1 tbl, 11 ex