Indian Oil Corporation Limited

Soban Ghosh

Mohan Prabhu Kuvettu

Ram Mohan Thakur

Satish Makhija

Sanjay Kumar Ray

Venkatachalam Krishnan

Manoranjan Santra

Ganga Shanker Mishra

Christopher J

A synthetic faujasite zeolite and a process for preparing the same which includes forming a reaction mixture consisting essentially of water, a source of silica, a source of alumina, Na,O nd nucleation centers, wherein the reaction mixture has molar ratios of constituents including Na,O/SiO,, 0.4-0.9; SiO,/Al,O,, 7-13; and H,O/Na,O, 30-45, and wherein the nucleation centers have molar ratios of constituents including Na,O/SiO,, 0.5-2.0; SiO,/Al,0,, 10-20; and H,O/Na,O, 10-40; and heating the reaction mixture to a temperature ranging from 90 to 110&deg; C. for a time period ranging from 23 to 29 hours to obtain the synthetic faujasite zeolite, wherein the synthetic faujasite zeolite has a crystallite size ranging from 1500 to 2000 &angst;, a particle size ranging from 4000 to 8000 &angst;, and a retention of surface of more than 70% of that of a parent zeolite, when exchanged with ammonia and subjected to hydrothermal treatment at 650&deg; C. for 3 hours and with 100% steam.

Process for preparing an hydrothermally stable, large crystallite sized, highly crystallite sized, highly crystalline synthetic faujasite zeolite

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Faridabad, India

Soban Ghosh