Process for the preparation of a molecular sieve adsorbent for the adsorptive dehydration of alcohols

A process for the preparation of a molecular sieve adsorbent for the adsorptive dehydration of alcohols using a molecular sieve adsorbent represented by the chemical formula:

• (Na2O)6.(Al2O3)6.(SiO2)12.(M2/nO2).wH2O, where M is Si, Al, Zr, Ti;
• n its valancy, the values of x varies from 0.001 to 0.1 and w being the number of moles of water, which comprises activating the molecular sieve at temperature in a range of 350 to 450° C. to eliminate physically adsorbed water for a period ranging from 3 to 6 hours;
• cooling the solid under vacuum in a range of 10−2 to 10−4 torr;
• treating the activated solid with a solution of alkoxide in a dry solvent for a period of 4 to 8 hours;
• and heating the alkoxide deposited solid in the temperature range of 450 to 600° C. for a period ranging from 3 to 8 hours.

A process for the preparation of a molecular sieve adsorbent for the adsorptive dehydration of alcohols using a molecular sieve adsorbent represented by the chemical formula:

• (Na2O)6.(Al2O3)6.(SiO2)12.(M2/n O2)x.wH2O, where M is Si Al, Zr, Ti;
• n its valancy, the values of x varies from 0.001 to 0.1 and w being the number of moles of water, which comprises activating the molecular sieve at temperature in the range of 350 to 450° C. to eliminate physically adsorbed water for a period ranging from 3 to 6 hours;
• cooling the solid under vacuum in the range of 10−2 to 10−4 torr;
• treating the activated solid with vapours of the alkoxide at a temperature range of 80 to 150° C. for a period of 2-to 6 hours;
• heating the alkoxide deposited solid in the temperature range of 450 to 600° C. for a period ranging from 3 to 8 hours.