Council of Scientific and Industrial Research

Turaga Sundara Rama Prasada Rao

Nagabhatla Viswanadham

Nirmalya Ray

Uma Shanker

Ajit Ramchandra Pradhan

Surendranath Suresh

This invention relates to a novel porous crystalline synthetic catalyst having the general formula expressed in the form of oxides: M 2/n o. x Al,O,Y SiO,, Z ZnO wherein, M represents a proton and/or a metallic cation, n is the valence of the said cation, Y/x is a number ranging from 5 to 1000 (SiO,/Al,O,molar ratio), and a process for preparing such catalyst by (a) forming a reaction medium comprising water, a silicon source, an aluminium source, a zinc source and a source of structure directing agent capable of providing organic cations, (b) heating the said reaction mixture to a temperature ranging from 80&deg; C. to 230&deg; C. at autogeneous phase, and (c) heating the solid content obtained at the end of step (b) to a temperature greater than 400&deg; C., so as to eliminate the organic species present due to the use of the structuring agent.

Catalyst comprising oxides of silicon, zinc and aluminium used for the preparation of LPG and high octane aromatics and a process for preparing the same

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Dehradun, India

Turaga Sundara Rama Prasada Rao