Patent ID: 9011694
Filing Date: 2015-04-21
Classification: B01J,C01G,C01P,C02F,Y10T

Abstract:
1. A method for the synthesis of a tetravalent manganese feroxyhite (δ-Fe (1-x) Mn x OOH), characterized by the fact that the method takes place in a continuous flow reactor, under weak acidic conditions and controlled redox and the method comprises the following steps: i) in a first stage reactor, FeSO ii) subsequently, the reaction is completed in a second stage reactor with the pH value in the second stage reactor being adjusted in the weak acidic range 4-7 by adding one or a combination of more than one of the reagents NaOH, NaHCO iii) subsequently, the product comes out from the outflow of the second stage reactor, enters the thickening tank, where by a slow stirring for 1-48 h the grain geometry is controlled between irregular spheres to hollow spheres and the specific surface area between 100 m