METHOD AND DEVICE FOR CONTINUOUS PRODUCTION OF METAL OXIDE CATALYST Russian patent published in 2013 - IPC B01J23/70 B01J23/16 B01J37/00 C01G1/02 C01B13/14 B01J8/00 

FIELD: process engineering.

SUBSTANCE: invention relates to production of metal oxide materials, including metal hydroxides and/or metal oxides and catalysts. Proposed method comprises the following steps: dissolving metals in nitric acid to produce metal nitride and releasing NO_X and water vapor. Hydrolysis of metal nitride solution by introducing compressed superheated water vapor in metal nitride solution to produce suspension of hydroxide suspension and acid gas. Main components of acid gas are NO₂, NO, O₂ and water vapor. Suspension filtration and drying to produce metal hydroxides and/or metal oxides. Further recovery of produced metal hydroxides and/or metal oxides and production of metal oxide catalyst in traditional process. Released gas NO_X may be used for production of reusable nitric acid. Proposed device consists of system to produce metal salt solution, metal salt solution hydrolysis system, product production system, and system to produce and recycle nitric acid.

EFFECT: continuous production, closed circulation, no emissions, reduced costs.

17 cl, 1 tbl, 2 ex, 1 dwg