Catalyst preparation method

摘要

A method for preparing a catalyst comprising (i) preparing a calcined shaped calcium aluminate catalyst support, (ii) treating the calcined shaped calcium aluminate support with water, and then drying the support, (iii) impregnating the dried support with a solution containing one or more metal compounds and drying the impregnated support, (iv) calcining the dried impregnated support, to form metal oxide on the surface of the support and (v) optionally repeating steps (ii), (iii) and (iv) on the metal oxide coated support. The method provides an eggshell catalyst in which the metal oxide is concentrated in an outer layer on the support.

主权项

1. A method for preparing a catalyst comprising:
(i) preparing a calcined shaped calcium aluminate catalyst support by forming a calcium aluminate cement powder, optionally with additional alumina and/or lime, into a desired shape, curing the cement and subsequently calcining the shaped support by heating to between 500 and 1400° C. in air for between 1 and 16 hours, (ii) prior to impregnating the calcined shaped support with a solution containing one or more metal compounds, treating the calcined shaped calcium aluminate support with water, said water being essentially free of salts, and then drying the support, (iii) impregnating the dried support with the solution containing one or more metal compounds and drying the impregnated support, (iv) calcining the dried impregnated support, to form metal oxide on the surface of the support, and (v) optionally repeating steps (ii), (iii) and (iv) on the metal oxide coated support.