Fluidized catalytic cracking process

US6267873A · kind A · utility

Assignee

• Indian Oil Corporation Limited · IN

Inventors

• Asit Kumar Das · Faridabad, IN
• Debasis Bhattacharyya · Faridabad, IN
• Sukumar Mandal · Faridabad, IN
• Vutukuru Lakshmi Narasimha Murthy · Bengaluru, IN
• Sanjeev Singh · San Francisco, US
• Marri Rama Rao · Faridabad, IN
• Sobhan Ghosh · Faridabad, IN

Key dates

• Filing date: Nov 30, 1998
• Grant date: Jul 31, 2001
• Expiry date: Nov 30, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S585/91
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A fluidized catalytic cracking process for catalytically cracking a feed to lighter products includes introducing a heated catalyst and the feed into a bottom riser of a fluidized catalytic cracking apparatus and allowing the heated catalyst and the feed to preaccelerate upwardly within the bottom riser as a mixture; flowing the mixture upwardly from the bottom riser through a plurality of microriser tubes disposed within a regenerator under conditions effective to cause a cracking reaction of the hydrocarbons and result in a mixture including coked catalyst and hydrocarbon vapors; passing the mixture from the microriser tubes through a catalyst separator for separating the coked catalyst from the hydrocarbon vapors; collecting coked catalyst in a stripper for stripping out hydrocarbon vapors carried along with the coked catalyst and introducing the coked catalyst collected into a regenerator; simultaneous with flowing the mixture, combusting the coked catalyst within the regenerator under conditions effective to cause regeneration of the catalyst so that hot regenerated catalyst is produced and heat transferred to the microriser tubes; introducing the hot regenerated catalyst from…