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

US6177374A · kind A · utility

Assignee

• COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH · IN

Inventors

• Ajit Ramchandra Pradhan · Walnut Creek, US
• Nagabhatla Viswanadham · Dehradun, IN
• Surendranath Suresh · Dehradun, IN
• Nirmalya Ray · Dehradun, IN
• Uma Shanker · Noida, IN
• Turaga Sundara Rama Prasada Rao · Dehradun, IN

Key dates

• Filing date: Jan 17, 1997
• Grant date: Jan 23, 2001
• Expiry date: Jan 17, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S423/22
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

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.sub.2 O.sub.3 Y SiO.sub.2, 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.sub.2 /Al.sub.2 O.sub.S 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.degree. C. to 230.degree. C. at autogeneous phase, and (c) heating the solid content obtained at the end of step (b) to a temperature greater than 400.degree. C., so as to eliminate the organic species present due to the use of the structuring agent.