Patent ID: 9012351
Filing Date: 2015-04-21
Classification: B01J,C01B,C01G,C01P

Abstract:
1. A method for preparing a metal oxides catalyst, the method is characterized by the following method: (a) dissolving one or more kinds of metal materials in nitric acid solution to produce a metal nitrate solution, and also to produce NOx and water vapor; (b) introducing pressurized superheated water vapor into the obtained metal nitrate solution to perform hydrolysis to obtain acidic gas and a slurry of hydrates of metal oxides, wherein main components of the acidic gas are NO (c) filtering the slurry of hydrates of metal oxides to obtain the hydrates of metal oxides and a filtrate and drying the hydrates of metal oxides to obtain the corresponding hydrates of metal oxides and/or metal oxides; and (d) using the hydrates of metal oxides and/or metal oxides as raw materials to prepare a metal oxides catalyst.