Catalyst composition and method for preparing catalyst

An isomerization catalyst composition comprising an alumina-based catalyst wherein the alumina-based catalyst has a pore volume of pores having a pore size less than # imgabs0 # less than about 5% of the total pore volume, a pore volume of pores having a pore size greater than # imgabs1 # less than 10% of the total pore volume, a volume median pore size less than # imgabs2 # water pore volume less than 1.2 cc/g, and a surface area greater than 130 m2/g. The isomerization catalyst composition may include a Group I cation, a Group II cation, and mixtures thereof. 一种异构化催化剂组合物，包含氧化铝基催化剂，其中所述氧化铝基催化剂的孔径小于#imgabs0#的孔的孔体积小于总孔体积的约5％，孔径大于#imgabs1#的孔的孔体积小于总孔体积的10％，体积中值孔径小于#imgabs2#水孔体积小于1.2cc/g，并且表面积大于130m2/g。所述异构化催化剂组合物可包含第I族阳离子、第II族阳离子及其混合物。