Council of Scientific and Industrial Research

Nirmalya Ray

Nagabhatla Viswanadham

Uma Shanker

Turuga Sundara Rao

Ajit Ramchandra Pradhan

Turaga Sundara Rama Prasada Rao

Ajit Ram Pradhan

Surendranath Suresh

Mohan Lal Sharma

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

The present invention relates to a process for production of LPG and high octane aromatic hydrocarbon from non-economically viable petroleum feedstock, which comprises passing the same feedstock through zinc-aluminosilicate molecular sieve (Zn-ZSM-5), in a reactor at a temperature in the range of 300-600.degree. C. pressure 1 to 30 atmosphere liquid hourly space velocity of 1 to 10 hr.sup.-1 and nitrogen to hydrocarbon molar ratio 1 to 4.

Process for the production of LPG and high octane aromatic hydrocarbons

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Dehradun, India

Nirmalya Ray