Process for catalytic cracking of petroleum based feed stocks

US5846402A · kind A · utility

Assignee

• Indian Oil Corporation Limited · IN

Inventors

• Sukumar Mandal · Faridabad, IN
• Suresh Kumarshah · Faridabad, IN
• Debasis Bhattacharyya · Faridabad, IN
• Vutukuru Lakshmi Narasimha Murthy · Bengaluru, IN
• Asit Kumar Das · Faridabad, IN
• Sanjeev Singh · San Francisco, US
• Ram Mohan Thakur · Faridabad, IN
• Shankar Sharma · Faridabad, IN
• Jagdev Kumar Dixit · Faridabad, IN
• Sobhan Ghosh · Faridabad, IN
• Satyen Kumar Das · Barwala, IN
• Manoranjan Santra · Barwala, IN
• Latoor Lal Saroya · Faridabad, IN
• Marri Rama Rao · Faridabad, IN
• Ganga Shanker Mishra · Faridabad, IN
• Satish Makhija · Barwala, IN

Key dates

• Filing date: May 14, 1997
• Grant date: Dec 8, 1998
• Expiry date: May 14, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10G2400/28
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for selective catalytic cracking of a petroleum-based feedstock to produce a product having a high yield of liquified petroleum gas (LPG) and light olefins having 3 to 4 carbons includes providing a fluidized bed reactor which is a high velocity riser, continuously circulating fluidized bed reactor; providing a solid acidic catalyst comprised of: from 1 to 6% by wt. of ultra stable Y-zeolite; from 8-25% by wt. of Pentasil zeolite which is shape selective; from 0-8% by wt. of an active material which is bottom selective; from 0-1% by wt. of rare earth constituents; and from 91 to 60% by wt. of nonacidic constituents and binder; charging the fluidized bed reactor with the solid acidic catalyst and the petroleum-based feedstock; and cracking the petroleum-based feedstock in the presence of the solid acidic catalyst in the fluidized bed reactor. The reactor is operated at a Weight Hourly Space Velocity (WHSV) ranging from 40 to 120 hr.sup.-1, a ratio of solid acidic catalyst to petroleum-based feedstock ranging from 15 to 25, a temperature at the top of the high velocity riser ranging from 530.degree. C. to 600.degree. C., recycled riser products ranging from 0 to 40%, a pres…