Methods for preparing integral while maintaining acidity of zeolite catalysts and catalysts made from the same

摘要

1 / 1 summary methods to prepare catalysts while maintaining acidity of zeolite and integral catalyst made by the same methods to prepare catalysts including a component of transition metal 5 and a component of zeolite are revealed.In some arrangements, the transition metal is deposited in a solution of a precursor of a croquette of zeolite to form an integral catalyst intermediate, in which prior to the deposit, the zeolite is subjected to ion exchange with cations of the original protection that exchange with the S protons of the zeolite.The catalyst is heated to decompose the full intermediary transition metal and the 10 catalyst is subsequently subjected to a secondary ion exchange with ammonium complex ion to exchange with cations of protection. The catalyst is treated with ammonium aquec resulting. Went to a temperature sufficient to decompose the ammonium to form complex ions (H +) and ammonia.The transition metal in the resulting catalyst is in the form of cristalitos reduced located outside the channels of zeolite. No appreciable ionic exchange 15 of the transition metal occurs inside the zeolite channels.