Mesoporous nanometer alumina, preparation method and application thereof

The present invention provides a method for preparing a mesoporous nano-alumina, the method comprising: preparing a gel system containing a templating agent, and an aluminum source; and then removing the solvent and calcining the gel system, to obtain mesoporous nano-alumina; wherein the templating agent is as in formula (1) shown in block copolyether; wherein, Rl is an amino-substituted hydrocarbon group, x, y and z are each independently 1 to 100; the source of aluminum is an organic source of aluminum. The present invention further provides a preparation prepared by the method of the obtained mesoporous nano-alumina and its application in the dehydration of isopropanol to propylene. The present invention provides a method for preparing a solution without adjusting pH, the method is simple and reduce the environmental burden; prepared mesoporous nano-alumina having a large specific surface area and pore size and dehydration of isopropanol to propylene can be obtained in high isopropanol conversion and propylene selectivity. Formula (1)