Patent ID: 9162899
Filing Date: 2015-10-20
Classification: B01J,C01B,C07C

Abstract:
1. A method for preparing BaX type zeolite granules, comprising: (1) adding a carbohydrate-based molding promoter to NaX type zeolite powder, spraying alumina sol and silica sol thereto, and blending them together to form granules; (2) classifying the granules to obtain granules having a size of 0.25-1.20 mm; (3) drying the obtained granules and then calcinating the dried granules at the temperature range of 200-500° C. so as to remove the carbohydrate-based molding promoter, thereby generating pores; (4) placing the calcinated granules obtained from the step (3) in an aqueous solution of sodium hydroxide to allow a hydrothermal reaction, and separating and washing the resulted granules from the reaction solution; (5) treating the granules obtained from the step (4) with aqueous barium ion solution for ion-exchange, and then washing and drying the resultant; and (6) heating the dried granules obtained from the step (5) at the temperature range of 350-650° C. to remove water of crystallization from the granules, thereby activating the granules.