METHOD FOR PRODUCING MESOPOROUS XEROGELS AND NANOPOWDERS IN SYSTEM ZRO2(Y2O3)-AL2O3 FOR CARRIERS OF CATALYSTS AT METHANE CONVERSION INTO SYNTHESIS GAS Russian patent published in 2017 - IPC B01J32/00 B82B1/00 B82Y40/00 

FIELD: chemistry.

SUBSTANCE: invention relates to the synthesis of mesoporous materials, namely, to a method for producing mesoporous xerogels and nanopowders in the system ZrO₂(Y₂O₃)-Al₂O₃ for catalyst carriers at the methane conversion into synthesis gas. The method is carried out by co-precipitating the original reagents with an aqueous ammonia solution of 0.05-0.15 M. As original reagents, 0.05-0.15 M aqueous solutions of ZrO(NO₃)₂⋅2H₂O, Y(NO₃)₃⋅6H₂O and Al(NO₃)₃⋅9H₂O are used. When the hydroxides are co-precipitated in the reactor, a constant pH value is maintained in the range of 9.15 to 9.45 with a solution NH₄Cl. After that, the co-precipitated hydroxides are dried and subjected to cryochemical treatment at a temperature of -20 to -30°C during the day. Then the obtained xerogels are heat treated at a temperature of 500-650°C to produce a metastable tetragonal solid solution based on ZrO₂.

EFFECT: production of highly disperse mesoporous xerogels and nanopowders, which are efficiently used as catalyst carriers in the development of catalytic systems.

5 dwg, 2 tbl, 3 ex