COMPOSITE ZEOLITES SYNTHESIZED FROM (TEA)₂O-Na₂O- Al₂O₃-SiO₂-H₂O SYSTEM : STRUCTURAL CHARACTERISTICS AND HYDRATION ACTIVITY

ABSTRACT

Several catalysts of composite zeolites were synthesized from (TEA) ₂O-Na₂O-Al₂O₃-SiO₂-H₂O system adopting different conditions of the preparation. The prepared zeolites, in the hydrogen-exchanged form were characterized by EDS and XRD. The obtained catalysts consisted of ß-zeolite composited with different amounts of other zeolites such as morderute and/or analcime. Acidic properties of these composite zeolites were measured potentiometrically in an aqueous medium. The hydration of butene-1 over the H-exchanged composite zeolites was carried out at 250°C and 180 atm, and with a water/olefin ratio of 3.86. The hydration activity was discussed in terms of structural characteristics and acidic properties of the prepared catalysts.

Keywords:

• analcime
• mordenite
• ß-Zeolite
• hydration
• light olefins

Additional information

Notes on contributors

S. Faramawy

Present address: Chemistry Department, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.