Patent ID: 7407906

Claim:
A process for the preparation of a molecular sieve adsorbent for adsorptive dehydration of alcohols, said process comprising the steps of: a) obtaining a molecular sieve adsorbent represented by the chemical formula: (Na 2 O) 6 . (Al 2 O 3 ) 6 . (SiO 2 ) 12 . (M 2/n O 2 ) x . wH 2 O, where M is the element selected from Si, Al, Zr and Ti; n its valance, the values of x varies from 0.001 to 0.1, and w is the number of moles of water; b) activating the molecular sieve adsorbent at a temperature in the range of 350 to 450° C. to eliminate physically adsorbed water, for a period ranging from 3 to 6 hours; c) cooling the activated the molecular sieve adsorbent under vacuum in the range of 10 −2 to 10 −4 torr; d) treating the activated adsorbent with an alkoxide of element M in a dry solvent; e) drying the treated activated adsorbent of step (d) in air in static condition at a temperature in the range of 15 to 40° C.; f) converting the alkoxide deposited on modified adsorbent into silica by calcining the same in a temperature range of 450 to 600° C. for a period ranging from 3 to 8 hrs, and g) obtaining the adsorbent by cooling the calcined product of step (g) at ambient temperature in static condition.