of tetraethylammonium hydroxide teaoh 20 wt 91 8 g of tetraethylammonium bromide 350 00 g of deionized water and 10 00 g of zeolite beta 3 9 wt based on total sio 2 to give a gel composition in terms of the molar ratio as follows this gel was heated while stirring to reflux temperature under atmospheric pressure and was kept refluxing for 86 hours an aqueous solution containing 2 28 wt al 2 o 3 and 19 76 wt teaoh and prepared by dissolving aluminum chips in 20 wt tetraethylammonium hydroxide was added to the reaction mixture another aqueous solution containing 13 80 wt alcl 3 and 25 wt teabr was added into the solution simultaneously additions were continued for 29 hours until a total of 540 grams of a1 teaoh solution and 235 grams of alcl 3 teabr solution were added the reaction mixture having the following overall composition was stirred for another 65 hours the zeolitic product was collected by filtration washed three times with deionized water and dried at 100 u00b0 c the isolated product gave an x ray powder diffraction pattern identical to that of zeolite gzs 11 and icp analysis gave a sio 2 al 2 o 3 ratio of 9 4 a synthesis mixture was prepared by mixing 2 50 kg of sodium aluminate solution al 2 o 3 21 40 wt na 2 o 18 20 wt 10 51 kg of precipitated silica 90 wt sio 2 15 85 kg of tetraethylammonium hydroxide 20 wt 3 61 kg of tetraethylammonium chloride 99 wt and 17 50 liters of deionized water to give a gel composition in terms.