A METHOD FOR MAKING A CATALYST PRECURSOR

摘要

The present invention relates to a method for making a catalyst precursor with enhanced hydrothermal stability, comprising: providing a material comprising a crystalline hydrous alumina precursor, wherein the crystalline hydrous alumina precursor comprises at least one crystalline boehmite having an average crystallite size selected from an optimum range from about 4 nm to about 30 nm, or comprises at least one crystalline bayerite; contacting the material with at least one structural stabilizer or a compound thereof; shaping the contacted material in the presence of the compound of the at least one structural stabilizer so as to form a shaped alumina precursor material in the form of particles of a desired average particle size, wherein the shaped alumina precursor material comprises the crystalline hydrous alumina precursor and the at least one structural stabilizer or compound thereof; calcining the shaped alumina precursor material under suitable calcination conditions to effect the conversion of the crystalline hydrous alumina precursor to a stabilized aluminum oxide structure and to generate a stabilized catalyst support; and applying a catalytic metal or a compound thereof to said stabilized catalyst support to form a catalyst precursor, wherein the catalytic metal comprises a Group 8 metal, a Group 9 metal, a Group 10 metal, or combinations thereof.