Patent ID: 9573822
Date: 2017-02-21
CPC Classifications: B01J,C01B,C01C,C01F,C01P,Y02P,Y10T

Claim:
1. A method for producing a mayenite compound, the method comprising: (1) a step of forming a precursor powder of a mayenite compound by subjecting a mixture of a raw material powder of the mayenite compound and water to a hydrothermal treatment; (2) a step of forming a mayenite compound powder by dehydrating the precursor powder by heating; (3) a step of forming an activated mayenite compound powder by heating the mayenite compound powder in an inert gas atmosphere or in a vacuum in a temperature range of 400° C. to 1,000° C. for three hours or more; and (4) a step of injecting electrons into the mayenite compound by mixing the activated mayenite compound powder with a reducing agent and heating the resulting mixture in a temperature range of 400° C. to 1,100° C. to conduct a reduction treatment, wherein a conductive mayenite compound powder having a conduction electron concentration of 10