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This paper presents the results of the peptizability of boehmite and its application for the preparation of -Al2O3 in spherical shape. The obtained -Al2O3 in spherical shape has high mechanical resistance and high surface area. The water vapor adsorption ability of sphere of - Al2O3 has also been determined. -Al2O3 in spherical shape can adsorb moisture up to 65% of their weight. | Journal of Chemistry Vol. 45 Special issue P. 158 -161 2007 STUDY ON PEPTIZABILITY OF BOEHMITE AND ITS APPLICATION FOR THE PEPARATION OF y-Al2O3 IN SPHERICAL SHAPE Received 15 October 2007 NGUyEN HAN LONG TRAN VINH HOANG PHAM THANH HUyEN Faculty of Chemical Technology Hanoi University of Technology SUMMARy This paper presents the results of the peptizability of boehmite and its application for the preparation of ỵ-Al2O3 in spherical shape. The obtained ỵ-Al2O3 in spherical shape has high mechanical resistance and high surface area. The water vapor adsorption ability of sphere of Ỵ-Al2O3 has also been determined. ỵ-Al2O3 in spherical shape can adsorb moisture up to 65 of their weight. I - INTRODUCTION II - EXPERIMENTAL y-Al2O3 is a mesoporous material which has high acidity activity good mechanical and thermal resistance. So y-Al2O3 is widely used as the adsorbent and catalyst in the refinery and petrochemical technology in particular and in the chemical industry in general 1 2 . However in order to use it in chemical processes beside the study to increase its surface area 3 the formation of y-Al2O3 in spherical shape is very important. One of the most important properties of boehmite is its peptizability to be the binder for other materials that do not have this ability. So the application of boehmite as the binder has greatly increased the value and the application range of y-Al2O3 and other materials. The refinery and petrochemical industry is being built in Vietnam. Each year a large amount of y-Al2O3 in spherical shape is imported to be used as the adsorbent in the drying of natural gas. So finding a procedure to synthesize y-Al2O3 in spherical shape from cheap and available domestic raw material is very necessary. 158 y-Al2O3 has been synthesized from available domestic raw materials such as waste aluminum Tan Binh aluminum hydroxide and industrial aluminous material. Other chemicals include NaOH H2SO4 H2O2 organic additives and peptization reagent. These .
