Method for making silica supported, crush-resistant catalysts
AssigneePQ Corporation
InventorYatao Hu
Life of this patent
Estimating the term…
Abstract
A method for making a silica supported catalyst involves impregnating a silica component with a catalytic metal using an aqueous, alkaline bath before drying. More specifically, the method involves forming and washing a silica component, such as a silica gel or a co-gel, for example a silica-zirconia co-gel. Then, the washed silica component is contacted with the alkaline bath to effect the impregnation with the catalytic metal, such as cesium, to form an activated silica component. Subsequently, the activated silica component is dried to form the catalyst. The resulting catalysts demonstrate good mechanical strength.
Claims18
A method for making a catalyst comprising the steps of:
- forming a silica component, wherein the silica component is a silica hydrogel;
- washing said silica hydrogel;
- contacting said silica hydrogel with an aqueous, alkaline bath comprising a catalytic metal selected from the group consisting of an alkali metal and an alkaline earth metal to impregnate said silica hydrogel with said catalytic metal to form an activated silica hydrogel;
- and
- drying said activated silica hydrogel to form said catalyst.
A method for making a catalyst comprising the steps of:
- combining an alkali metal silicate, a mineral acid, and a source of zirconium to form a hydrosol and allowing said hydrosol to set to form a co-gel;
- washing said co-gel;
- contacting said co-gel with an aqueous, alkaline bath comprising cesium to impregnate said co-gel with said cesium to form an activated silica co-gel, wherein said bath has a pH between and 8 and 9.5 at the end of the metal impregnation;
- and
- drying said activated silica co-gel to form said catalyst.
Dependencies are inferred from the claim text.